Articles | Volume 19, issue 1
Research article 03 Jan 2022
Research article | 03 Jan 2022
An analysis of the variability in δ13C in macroalgae from the Gulf of California: indicative of carbon concentration mechanisms and isotope discrimination during carbon assimilation
Roberto Velázquez-Ochoa et al.
Related subject area
Biogeochemistry: Stable Isotopes & Other TracersSummertime productivity and carbon export potential in the Weddell Sea, with a focus on the waters adjacent to Larsen C Ice ShelfParticulate biogenic barium tracer of mesopelagic carbon remineralization in the Mediterranean Sea (PEACETIME project)Hydrogen and carbon isotope fractionation factors of aerobic methane oxidation in deep-sea waterHost-influenced geochemical signature in the parasitic foraminifera Hyrrokkin sarcophagaComparing modified substrate-induced respiration with selective inhibition (SIRIN) and N2O isotope approaches to estimate fungal contribution to denitrification in three arable soils under anoxic conditionsHow are oxygen budgets influenced by dissolved iron and growth of oxygenic phototrophs in an iron-rich spring system? Initial results from the Espan Spring in Fürth, GermanyStable isotope ratios in seawater nitrate reflect the influence of Pacific water along the northwest Atlantic marginHigh-resolution 14C bomb peak dating and climate response analyses of subseasonal stable isotope signals in wood of the African baobab – a case study from OmanGeographic variability in freshwater methane hydrogen isotope ratios and its implications for global isotopic source signaturesSeasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratiosDifference of SPAC composition and control factors of different vegetation zones in north slope of Qilian MountainsEvaluating the response of δ13C in Haloxylon ammodendron, a dominant C4 species in Asian desert ecosystems, to water and nitrogen addition as well as the availability of its δ13C as an indicator of water use efficiencyModern silicon dynamics of a small high-latitude subarctic lakeRadium-228-derived ocean mixing and trace element inputs in the South AtlanticNitrogen isotopic fractionations during nitric oxide production in an agricultural soilSilicon uptake and isotope fractionation dynamics by crop speciesBarium stable isotopes as a fingerprint of biological cycling in the Amazon River basinBottomland hardwood forest growth and stress response to hydroclimatic variation: evidence from dendrochronology and tree ring Δ13C valuesN2O isotope approaches for source partitioning of N2O production and estimation of N2O reduction – validation with the 15N gas-flux method in laboratory and field studiesTechnical note: Single-shell δ11B analysis of Cibicidoides wuellerstorfi using femtosecond laser ablation MC-ICPMS and secondary ion mass spectrometryBiogeochemical evidence of anaerobic methane oxidation and anaerobic ammonium oxidation in a stratified lake using stable isotopesEffects of 238U variability and physical transport on water column 234Th downward fluxes in the coastal upwelling system off PeruDo degree and rate of silicate weathering depend on plant productivity?Alpine Holocene tree-ring dataset: age-related trends in the stable isotopes of cellulose show species-specific patternsIdeas and perspectives: The same carbon behaves like different elements – an insight into position-specific isotope distributionsSeasonal dynamics of the COS and CO2 exchange of a managed temperate grasslandLeaf-scale quantification of the effect of photosynthetic gas exchange on Δ17O of atmospheric CO2The stable carbon isotope signature of methane produced by saprotrophic fungiUnderstanding the effects of early degradation on isotopic tracers: implications for sediment source attribution using compound-specific isotope analysis (CSIA)Oxygen isotope composition of waters recorded in carbonates in strong clumped and oxygen isotopic disequilibriumIsotopic evidence for alteration of nitrous oxide emissions and producing pathways' contribution under nitrifying conditionsTrace element composition of size-fractionated suspended particulate matter samples from the Qatari Exclusive Economic Zone of the Arabian Gulf: the role of atmospheric dustBenthic carbon fixation and cycling in diffuse hydrothermal and background sediments in the Bransfield Strait, AntarcticaChanges in gross oxygen production, net oxygen production, and air-water gas exchange during seasonal ice melt in Whycocomagh Bay, a Canadian estuary in the Bras d'Or Lake systemPlants or bacteria? 130 years of mixed imprints in Lake Baldegg sediments (Switzerland), as revealed by compound-specific isotope analysis (CSIA) and biomarker analysisCommercial traceability of Arapaima spp. fisheries in the Amazon basin: can biogeochemical tags be useful?Distribution of Fe isotopes in particles and colloids in the salinity gradient along the Lena River plume, Laptev SeaEarly season N2O emissions under variable water management in rice systems: source-partitioning emissions using isotope ratios along a depth profileEvolution of 231Pa and 230Th in overflow waters of the North AtlanticSouthern Ocean controls of the vertical marine δ13C gradient – a modelling studyNegligible isotopic fractionation of nitrogen within temperate Zostera spp. meadowsEcosystem fluxes of carbonyl sulfide in an old-growth forest: temporal dynamics and responses to diffuse radiation and heat wavesExport flux of unprocessed atmospheric nitrate from temperate forested catchments: a possible new index for nitrogen saturationSilicon isotopes of deep sea sponges: new insights into biomineralisation and skeletal structureLatitudinal trends in stable isotope signatures and carbon-concentrating mechanisms of northeast Atlantic rhodolithsSalinity control on Na incorporation into calcite tests of the planktonic foraminifera Trilobatus sacculifer – evidence from culture experiments and surface sedimentsThe silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic OceanTracing water masses with 129I and 236U in the subpolar North Atlantic along the GEOTRACES GA01 sectionEnvironmental and taxonomic controls of carbon and oxygen stable isotope composition in Sphagnum across broad climatic and geographic rangesEstimation of isotope variation of N2O during denitrification by Pseudomonas aureofaciens and Pseudomonas chlororaphis: implications for N2O source apportionment
Raquel F. Flynn, Thomas G. Bornman, Jessica M. Burger, Shantelle Smith, Kurt A. M. Spence, and Sarah E. Fawcett
Biogeosciences, 18, 6031–6059,Short summary
Biological activity in the shallow Weddell Sea affects the biogeochemistry of recently formed deep waters. To investigate the drivers of carbon and nutrient export, we measured rates of primary production and nitrogen uptake, characterized the phytoplankton community, and estimated nutrient depletion ratios across the under-sampled western Weddell Sea in mid-summer. Carbon export was highest at the ice shelves and was determined by a combination of physical, chemical, and biological factors.
Stéphanie H. M. Jacquet, Christian Tamburini, Marc Garel, Aurélie Dufour, France Van Vambeke, Frédéric A. C. Le Moigne, Nagib Bhairy, and Sophie Guasco
Biogeosciences, 18, 5891–5902,Short summary
We compared carbon remineralization rates (MRs) in the western and central Mediterranean Sea in late spring during the PEACETIME cruise, as assessed using the barium tracer. We reported higher and deeper (up to 1000 m depth) MRs in the western basin, potentially sustained by an additional particle export event driven by deep convection. The central basin is the site of a mosaic of blooming and non-blooming water masses and showed lower MRs that were restricted to the upper mesopelagic layer.
Shinsuke Kawagucci, Yohei Matsui, Akiko Makabe, Tatsuhiro Fukuba, Yuji Onishi, Takuro Nunoura, and Taichi Yokokawa
Biogeosciences, 18, 5351–5362,Short summary
Hydrogen and carbon isotope ratios of methane as well as the relevant biogeochemical parameters and microbial community compositions in hydrothermal plumes in the Okinawa Trough were observed. We succeeded in simultaneously determining hydrogen and carbon isotope fractionation factors associated with aerobic oxidation of methane in seawater (εH = 49.4 ± 5.0 ‰, εC = 5.2 ± 0.4 ‰) – the former being the first of its kind ever reported.
Nicolai Schleinkofer, David Evans, Max Wisshak, Janina Vanessa Büscher, Jens Fiebig, André Freiwald, Sven Härter, Horst R. Marschall, Silke Voigt, and Jacek Raddatz
Biogeosciences, 18, 4733–4753,Short summary
We have measured the chemical composition of the carbonate shells of the parasitic foraminifera Hyrrokkin sarcophaga in order to test if it is influenced by the host organism (bivalve or coral). We find that both the chemical and isotopic composition is influenced by the host organism. For example strontium is enriched in foraminifera that grew on corals, whose skeleton is built from aragonite, which is naturally enriched in strontium compared to the bivalves' calcite shell.
Lena Rohe, Traute-Heidi Anderson, Heinz Flessa, Anette Goeske, Dominika Lewicka-Szczebak, Nicole Wrage-Mönnig, and Reinhard Well
Biogeosciences, 18, 4629–4650,Short summary
This is the first experimental setup combining a complex set of methods (microbial inhibitors and isotopic approaches) to differentiate between N2O produced by fungi or bacteria during denitrification in three soils. Quantifying the fungal fraction with inhibitors was not successful due to large amounts of uninhibited N2O production. All successful methods suggested a small or missing fungal contribution. Artefacts occurring with microbial inhibition to determine N2O fluxes are discussed.
Inga Köhler, Raul E. Martinez, David Piatka, Achim J. Herrmann, Arianna Gallo, Michelle M. Gehringer, and Johannes A. C. Barth
Biogeosciences, 18, 4535–4548,Short summary
We investigated how high Fe(II) levels influence the O2 budget of a circum-neutral Fe(II)-rich spring and if a combined study of dissolved O (DO) and its isotopic composition can help assess this effect. We showed that dissolved Fe(II) can exert strong effects on the δ18ODO even though a constant supply of atmospheric O2 occurs. In the presence of photosynthesis, direct effects of Fe oxidation become masked. Critical Fe(II) concentrations indirectly control the DO by enhancing photosynthesis.
Owen A. Sherwood, Samuel H. Davin, Nadine Lehmann, Carolyn Buchwald, Evan N. Edinger, Moritz F. Lehmann, and Markus Kienast
Biogeosciences, 18, 4491–4510,Short summary
Pacific water flowing eastward through the Canadian Arctic plays an important role in redistributing nutrients to the northwest Atlantic Ocean. Using samples collected from northern Baffin Bay to the southern Labrador Shelf, we show that stable isotopic ratios in seawater nitrate reflect the fraction of Pacific to Atlantic water. These results provide a new framework for interpreting patterns of nitrogen isotopic variability recorded in modern and archival organic materials in the region.
Franziska Slotta, Lukas Wacker, Frank Riedel, Karl-Uwe Heußner, Kai Hartmann, and Gerhard Helle
Biogeosciences, 18, 3539–3564,Short summary
The African baobab is a challenging climate and environmental archive for its semi-arid habitat due to dating uncertainties and parenchyma-rich wood anatomy. Annually resolved F14C data of tree-ring cellulose (1941–2005) from a tree in Oman show the annual character of the baobab’s growth rings but were up to 8.8 % lower than expected for 1964–1967. Subseasonal δ13C and δ18O patterns reveal years with low average monsoon rain as well as heavy rainfall events from pre-monsoonal cyclones.
Peter M. J. Douglas, Emerald Stratigopoulos, Sanga Park, and Dawson Phan
Biogeosciences, 18, 3505–3527,Short summary
Hydrogen isotopes could be a useful tool to help resolve the geographic distribution of methane emissions from freshwater environments. We analyzed an expanded global dataset of freshwater methane hydrogen isotope ratios and found significant geographic variation linked to water isotopic composition. This geographic variability could be used to resolve changing methane fluxes from freshwater environments and provide more accurate estimates of the relative balance of global methane sources.
Veronica R. Rollinson, Julie Granger, Sydney C. Clark, Mackenzie L. Blanusa, Claudia P. Koerting, Jamie M. P. Vaudrey, Lija A. Treibergs, Holly C. Westbrook, Catherine M. Matassa, Meredith G. Hastings, and Craig R. Tobias
Biogeosciences, 18, 3421–3444,Short summary
We measured nutrients and the naturally occurring nitrogen (N) and oxygen (O) stable isotope ratios of nitrate discharged from a New England river over an annual cycle, to monitor N loading and identify dominant sources from the watershed. We uncovered a seasonality to loading and sources of N from the watershed. Seasonality in the nitrate isotope ratios also informed on N cycling, conforming to theoretical expectations of riverine nutrient cycling.
Yuwei Liu, Guofeng Zhu, Zhuanxia Zhang, Zhigang Sun, Leilei Yong, Liyuan Sang, Lei Wang, and Kailiang Zhao
Revised manuscript accepted for BGShort summary
We took the water cycle process of soil-plant-atmospheric precipitation as the research objective. In the water cycle of soil-plant-atmospheric precipitation, precipitation is the main controlling role. The main source of replenishment for alpine meadow plants is precipitation and alpine meltwater, the main source of replenishment for forest plants is soil water, and the plants in the arid foothills mainly use groundwater.
Zixun Chen, Xuejun Liu, Xiaoqing Cui, Yaowen Han, Guoan Wang, and Jiazhu Li
Biogeosciences, 18, 2859–2870,Short summary
δ13C in plants is a sensitive long-term indicator of physiological acclimatization. The present study suggests that precipitation change and increasing atmospheric N deposition have little impact on δ13C of H. ammodendron, a dominant plant in central Asian deserts, but affect its gas exchange. In addition, this study shows that δ13C of H. ammodendron could not indicate its water use efficiency (WUE), suggesting that whether δ13C of C4 plants indicates WUE is species-specific.
Petra Zahajská, Carolina Olid, Johanna Stadmark, Sherilyn C. Fritz, Sophie Opfergelt, and Daniel J. Conley
Biogeosciences, 18, 2325–2345,Short summary
The drivers of high accumulation of single-cell siliceous algae (diatoms) in a high-latitude lake have not been fully characterized before. We studied silicon cycling of the lake through water, radon, silicon, and stable silicon isotope balances. Results showed that groundwater brings 3 times more water and dissolved silica than the stream inlet. We demonstrate that groundwater discharge and low sediment deposition have driven the high diatom accumulation in the studied lake in the past century.
Yu-Te Hsieh, Walter Geibert, E. Malcolm S. Woodward, Neil J. Wyatt, Maeve C. Lohan, Eric P. Achterberg, and Gideon M. Henderson
Biogeosciences, 18, 1645–1671,Short summary
The South Atlantic near 40° S is one of the high-productivity and most dynamic nutrient regions in the oceans, but the sources and fluxes of trace elements (TEs) to this region remain unclear. This study investigates seawater Ra-228 and provides important constraints on ocean mixing and dissolved TE fluxes to this region. Vertical mixing is a more important source than aeolian or shelf inputs in this region, but particulate or winter deep-mixing inputs may be required to balance the TE budgets.
Zhongjie Yu and Emily M. Elliott
Biogeosciences, 18, 805–829,Short summary
In this study, we demonstrated distinct nitrogen isotope effects for nitric oxide (NO) production from major microbial and chemical NO sources in an agricultural soil. These results highlight characteristic bond-forming and breaking mechanisms associated with microbial and chemical NO production and implicate that simultaneous isotopic analyses of NO and nitrous oxide (N2O) can lead to unprecedented insights into the sources and processes controlling NO and N2O emissions from agricultural soils.
Daniel A. Frick, Rainer Remus, Michael Sommer, Jürgen Augustin, Danuta Kaczorek, and Friedhelm von Blanckenburg
Biogeosciences, 17, 6475–6490,Short summary
Silicon is taken up by some plants to increase structural stability and to develop stress resistance and is rejected by others. To explore the underlying mechanisms, we used the stable isotopes of silicon that shift in their relative abundance depending on the biochemical transformation involved. On species with a rejective (tomato, mustard) and active (wheat) uptake mechanism, grown in hydroculture, we found that the transport of silicic acid is controlled by the precipitation of biogenic opal.
Quentin Charbonnier, Julien Bouchez, Jérôme Gaillardet, and Éric Gayer
Biogeosciences, 17, 5989–6015,Short summary
The abundance and isotope composition of the trace metal barium (Ba) allows us to track and quantify nutrient cycling throughout the Amazon Basin. In particular, we show that the Ba biological fingerprint evolves from that of a strong net nutrient uptake in the mountainous area of the Andes towards efficient nutrient recycling on the plains of the Lower Amazon. Our study highlights the fact that the geochemical signature of rock-derived nutrients transported by the Amazon is scarred by life.
Ajinkya G. Deshpande, Thomas W. Boutton, Ayumi Hyodo, Charles W. Lafon, and Georgianne W. Moore
Biogeosciences, 17, 5639–5653,Short summary
Wetland forests in the southern USA are threatened by changing climate and human-induced pressures. We used tree ring widths and C isotopes as indicators of forest growth and physiological stress, respectively, and compared these to past climate data. We observed that vegetation growing in the drier patches is susceptible to stress, while vegetation growth and physiology in wetter patches is less sensitive to unfavorable environmental conditions, highlighting the importance of optimal wetness.
Dominika Lewicka-Szczebak, Maciej Piotr Lewicki, and Reinhard Well
Biogeosciences, 17, 5513–5537,Short summary
We present the first validation of N2O isotopic approaches for estimating N2O source pathways and N2O reduction. These approaches are widely used for tracing soil nitrogen cycling, but the results of these estimations are very uncertain. Here we report the results from parallel treatments allowing for precise validation of these approaches, and we propose the best strategies for results interpretation, including the new idea of an isotope model integrating three isotopic signatures of N2O.
Markus Raitzsch, Claire Rollion-Bard, Ingo Horn, Grit Steinhoefel, Albert Benthien, Klaus-Uwe Richter, Matthieu Buisson, Pascale Louvat, and Jelle Bijma
Biogeosciences, 17, 5365–5375,Short summary
The isotopic composition of boron in carbonate shells of marine unicellular organisms is a popular tool to estimate seawater pH. Usually, many shells need to be dissolved and measured for boron isotopes, but the information on their spatial distribution is lost. Here, we investigate two techniques that allow for measuring boron isotopes within single shells and show that they yield robust mean values but provide additional information on the heterogeneity within and between single shells.
Florian Einsiedl, Anja Wunderlich, Mathieu Sebilo, Ömer K. Coskun, William D. Orsi, and Bernhard Mayer
Biogeosciences, 17, 5149–5161,Short summary
Nitrate pollution of freshwaters and methane emissions into the atmosphere are crucial factors in deteriorating the quality of drinking water and in contributing to global climate change. Here, we report vertical concentration and stable isotope profiles of CH4, NO3-, NO2-, and NH4+ in the water column of Fohnsee (southern Bavaria, Germany) that may indicate linkages between nitrate-dependent anaerobic methane oxidation and the anaerobic oxidation of ammonium.
Ruifang C. Xie, Frédéric A. C. Le Moigne, Insa Rapp, Jan Lüdke, Beat Gasser, Marcus Dengler, Volker Liebetrau, and Eric P. Achterberg
Biogeosciences, 17, 4919–4936,Short summary
Thorium-234 (234Th) is widely used to study carbon fluxes from the surface ocean to depth. But few studies stress the relevance of oceanic advection and diffusion on the downward 234Th fluxes in nearshore environments. Our study in offshore Peru showed strong temporal variations in both the importance of physical processes on 234Th flux estimates and the oceanic residence time of 234Th, whereas salinity-derived seawater 238U activities accounted for up to 40 % errors in 234Th flux estimates.
Ralf A. Oeser and Friedhelm von Blanckenburg
Biogeosciences, 17, 4883–4917,Short summary
We present a novel strategy to decipher the relative impact of biogenic and abiotic drivers of weathering. We parameterized the nutrient fluxes in four ecosystems along a climate and vegetation gradient situated on the Chilean Coastal Cordillera. We investigated how nutrient demand by plants drives weathering. We found that the increase in biomass nutrient demand is accommodated by faster nutrient recycling rather than an increase in the weathering–release rates.
Tito Arosio, Malin M. Ziehmer, Kurt Nicolussi, Christian Schlüchter, and Markus Leuenberger
Biogeosciences, 17, 4871–4882,Short summary
Stable isotopes in tree-ring cellulose are tools for climatic reconstructions, but interpretation is challenging due to nonclimate trends. We analyzed the tree-age trends in tree-ring isotopes of deciduous larch and evergreen cembran pine. Samples covering the whole Holocene were collected at the tree line in the Alps. For cambial ages over 100 years, we prove the absence of age trends in δD, δ18O, and δ13C for both species. For lower cambial ages, trends differ for each isotope and species.
Yuyang He, Xiaobin Cao, and Huiming Bao
Biogeosciences, 17, 4785–4795,Short summary
Different carbon sites in a large organic molecule have different isotope compositions. Different carbon sites may not have the chance to exchange isotopes at all. The lack of appreciation of this notion might be blamed for an unsettled debate on the thermodynamic state of an organism. Here we demonstrate using minerals, N2O, and acetic acid that the dearth of exchange among different carbon sites renders them as independent as if they were different elements in organic molecules.
Felix M. Spielmann, Albin Hammerle, Florian Kitz, Katharina Gerdel, and Georg Wohlfahrt
Biogeosciences, 17, 4281–4295,Short summary
Carbonyl sulfide (COS) can be used as a proxy for plant photosynthesis on an ecosystem scale. However, the relationships between COS and CO2 fluxes and their dependence on daily to seasonal changes in environmental drivers are still poorly understood. We examined COS and CO2 ecosystem fluxes above an agriculturally used mountain grassland for 6 months. Harvesting of the grassland disturbed the otherwise stable COS-to-CO2 uptake ratio. We even found the canopy to release COS during those times.
Getachew Agmuas Adnew, Thijs L. Pons, Gerbrand Koren, Wouter Peters, and Thomas Röckmann
Biogeosciences, 17, 3903–3922,Short summary
We measured the effect of photosynthesis, the largest flux in the carbon cycle, on the triple oxygen isotope composition of atmospheric CO2 at the leaf level during gas exchange using three plant species. The main factors that limit the impact of land vegetation on the triple oxygen isotope composition of atmospheric CO2 are identified, characterized and discussed. The effect of photosynthesis on the isotopic composition of CO2 is commonly quantified as discrimination (ΔA).
Moritz Schroll, Frank Keppler, Markus Greule, Christian Eckhardt, Holger Zorn, and Katharina Lenhart
Biogeosciences, 17, 3891–3901,Short summary
Fungi have recently been identified to produce the greenhouse gas methane. Here, we investigated the stable carbon isotope values of methane produced by saprotrophic fungi. Our results show that stable isotope values of methane from fungi are dependent on the fungal species and the metabolized substrate. They cover a broad range and overlap with stable carbon isotope values of methane reported for methanogenic archaea, the thermogenic degradation of organic matter, and other eukaryotes.
Pranav Hirave, Guido L. B. Wiesenberg, Axel Birkholz, and Christine Alewell
Biogeosciences, 17, 2169–2180,Short summary
Sediment input into water bodies is a prominent threat to freshwater ecosystems. We tested the stability of tracers employed in freshwater sediment tracing based on compound-specific isotope analysis during early degradation in soil. While bulk δ13C values showed no stability, δ13C values of plant-derived fatty acids and n-alkanes were stably transferred to the soil without soil particle size dependency after an early degradation in organic horizons, thus indicating their suitability as tracers.
Caroline Thaler, Amandine Katz, Magali Bonifacie, Bénédicte Ménez, and Magali Ader
Biogeosciences, 17, 1731–1744,Short summary
Paleoenvironment reconstructions, retrieved from δ18O and Δ47 values measured in carbonate, are compromised when crystallization occurs in isotopic disequilibrium. We show that some paleoenvironmental information can still be retrieved from these paired disequilibrium Δ47 and δ18O values. The possibility of retrieving information on paleowaters, sediments' interstitial waters, or organisms' body water at the carbonate precipitation loci will help understand past Earth and life evolution.
Guillaume Humbert, Mathieu Sébilo, Justine Fiat, Longqi Lang, Ahlem Filali, Véronique Vaury, Mathieu Spérandio, and Anniet M. Laverman
Biogeosciences, 17, 979–993,Short summary
Mitigating emissions of the greenhouse gas N2O requires understanding of the relative contribution of its producing processes in response to environmental variables. We show, using isotopic analysis, that N2O emissions from a nitrifying system were sensitive to oxygenation, temperature and NH4+ concentrations with nitrite reduction being the main N2O source. Temperature appears to be the main control on N2O production, due to its dissimilar effects on ammonium and nitrite oxidizing activities.
Oguz Yigiterhan, Ebrahim Mohd Al-Ansari, Alex Nelson, Mohamed Alaa Abdel-Moati, Jesse Turner, Hamood Abdulla Alsaadi, Barbara Paul, Ibrahim Abdullatif Al-Maslamani, Mehsin Abdulla Al-Ansi Al-Yafei, and James W. Murray
Biogeosciences, 17, 381–404,Short summary
We analyze net-tow samples of plankton and associated particulate matter from the Exclusive Economic Zone, Qatar, Arabian Gulf, using net tows with mesh sizes of 50 and 200 μm to examine the composition of plankton populations. We also focus on the role and composition of the atmospheric dust, representative of terrigenous material, deposited in the Gulf. We concluded that Al, Fe, Cr, Co, Mn, Ni, Pb, and Li are of dust origin and As, Cd, Cu, Mo, Zn, and Ca are of anthropogenic/biogenic origin.
Clare Woulds, James B. Bell, Adrian G. Glover, Steven Bouillon, and Louise S. Brown
Biogeosciences, 17, 1–12,Short summary
Sedimented hydrothermal vents occur where heated, mineral-rich (hydrothermal) water seeps through seafloor sediments. They host chemosynthetic microbes, which use chemical energy to fix dissolved carbon dioxide into sugars (chemosynthesis). We conducted carbon tracing experiments, and observed chemosynthesis at both vent and non-vent sites. Thus, chemosynthesis occurred over a much larger area than expected, suggesting it is more widespread than previously thought.
Cara C. Manning, Rachel H. R. Stanley, David P. Nicholson, Brice Loose, Ann Lovely, Peter Schlosser, and Bruce G. Hatcher
Biogeosciences, 16, 3351–3376,Short summary
We measured rates of biological activity and gas exchange in a Canadian estuary during ice melt. We quantified gas exchange using inert, deliberately released tracers and found that the gas transfer rate at > 90 % ice cover was 6 % of the rate for nearly ice-free conditions. We measured oxygen concentration and isotopic composition and used the data to detect changes in the rates of photosynthesis and respiration (autotrophy and heterotrophy) as the ice melted.
Marlène Lavrieux, Axel Birkholz, Katrin Meusburger, Guido L. B. Wiesenberg, Adrian Gilli, Christian Stamm, and Christine Alewell
Biogeosciences, 16, 2131–2146,Short summary
A fingerprinting approach using compound-specific stable isotopes was applied to a lake sediment core to reconstruct erosion processes over the past 150 years in a Swiss catchment. Even though the reconstruction of land use and eutrophication history was successful, the observation of comparatively low δ13C values of plant-derived fatty acids in the sediment suggests their alteration within the lake. Thus, their use as a tool for source attribution in sediment cores needs further investigation.
Luciana A. Pereira, Roberto V. Santos, Marília Hauser, Fabrice Duponchelle, Fernando Carvajal, Christophe Pecheyran, Sylvain Bérail, and Marc Pouilly
Biogeosciences, 16, 1781–1797,Short summary
This study presents the first step for a chemical origin certification of pirarucu fishery in the Amazon. A preliminary isotopic tool to improve the actual tracking system integrates ecological, social, and economic aspects of Amazon dynamics. The geographic origin validation of farmed and wild fishes contributes to environmental and social practices, secures food and income to communities, helps manage endangered species, reinforces aquaculture, and combats illegal fisheries.
Sarah Conrad, Johan Ingri, Johan Gelting, Fredrik Nordblad, Emma Engström, Ilia Rodushkin, Per S. Andersson, Don Porcelli, Örjan Gustafsson, Igor Semiletov, and Björn Öhlander
Biogeosciences, 16, 1305–1319,Short summary
Iron analysis of the particulate, colloidal, and truly dissolved fractions along the Lena River freshwater plume showed that the particulate iron dominates close to the coast. Over 99 % particulate and about 90 % colloidal iron were lost, while the truly dissolved phase was almost constant. Iron isotopes suggest that the shelf acts as a sink for particles and colloids with negative iron isotope values, while colloids with positive iron isotope values travel further out into the Arctic Ocean.
Elizabeth Verhoeven, Matti Barthel, Longfei Yu, Luisella Celi, Daniel Said-Pullicino, Steven Sleutel, Dominika Lewicka-Szczebak, Johan Six, and Charlotte Decock
Biogeosciences, 16, 383–408,Short summary
This study utilized state-of-the-art measurements of nitrogen isotopes to evaluate nitrogen cycling and to assess the biological sources of the potent greenhouse gas, N2O, in response to water-saving practices in rice systems. Water-saving practices did emit more N2O, and high N2O production had a lower 15N isotope signature. Modeling and visual interpretation indicate that these emissions mostly came from denitrification or nitrifier denitrification, controlled upstream by nitrification rates.
Feifei Deng, Gideon M. Henderson, Maxi Castrillejo, Fiz F. Perez, and Reiner Steinfeldt
Biogeosciences, 15, 7299–7313,Short summary
To better use Pa / Th to reconstruct deep water ventilation rate, we assessed controls on 230Th and 231Pa in the northern North Atlantic. With extended optimum multi-parameter analysis and CFC-based water-mass age, we found the imprint of young overflow water on Th and Pa and enhanced scavenging near the seafloor. A significantly higher advective loss of Pa to the south relative to Th in the Atlantic was estimated, supporting the use of Pa / Th for assessing basin-scale meridional transport.
Anne L. Morée, Jörg Schwinger, and Christoph Heinze
Biogeosciences, 15, 7205–7223,Short summary
Changes in the distribution of the carbon isotope 13C can be used to study the climate system if the governing processes (ocean circulation and biogeochemistry) are understood. We show the Southern Ocean importance for the global 13C distribution and that changes in 13C can be strongly influenced by biogeochemistry. Interpretation of 13C as a proxy for climate signals needs to take into account the effects of changes in biogeochemistry in addition to changes in ocean circulation.
Douglas G. Russell, Wei Wen Wong, and Perran L. M. Cook
Biogeosciences, 15, 7225–7234,Short summary
Nitrogen is an important nutrient in marine environments and is continually converted from one form to another. One way these processes can be investigated is by looking at the ratio of the 15N and 14N stable isotopes of different nitrogen-containing compounds. To date few studies have compared these ratios in seagrass beds, their associated sediments and the porewater NH4+ pool. The strong relationship between these nitrogen pools suggests that nitrogen is tightly recycled within seagrass beds.
Bharat Rastogi, Max Berkelhammer, Sonia Wharton, Mary E. Whelan, Frederick C. Meinzer, David Noone, and Christopher J. Still
Biogeosciences, 15, 7127–7139,Short summary
Carbonyl sulfide (OCS) has gained prominence as an independent tracer for gross primary productivity, which is usually modelled by partitioning net CO2 fluxes. Here, we present a simple empirical model for estimating ecosystem-scale OCS fluxes for a temperate old-growth forest and find that OCS sink strength scales with independently estimated CO2 uptake and is sensitive to the the fraction of downwelling diffuse light. We also examine the response of OCS and CO2 fluxes to sequential heat waves.
Fumiko Nakagawa, Urumu Tsunogai, Yusuke Obata, Kenta Ando, Naoyuki Yamashita, Tatsuyoshi Saito, Shigeki Uchiyama, Masayuki Morohashi, and Hiroyuki Sase
Biogeosciences, 15, 7025–7042,Short summary
To clarify the biological processing of nitrate within temperate forested catchments using unprocessed atmospheric nitrate exported from each catchment as a tracer, we continuously monitored stream nitrate concentrations and stable isotopic compositions in three forested catchments for more than 2 years. We concluded that the export flux of unprocessed atmospheric nitrate relative to the deposition flux in each forest ecosystem is applicable as an index for nitrogen saturation.
Lucie Cassarino, Christopher D. Coath, Joana R. Xavier, and Katharine R. Hendry
Biogeosciences, 15, 6959–6977,Short summary
Using a simple model, we show that the silicon isotopic composition of sponges can be used to estimate the silicic acid concentration of seawater, a key parameter linked to nutrient and carbon cycling. However, our data illustrate that skeletal type and growth rate also control silicon isotopic composition of sponges. Our study demonstrates the paleoceanographic utility of sponges as an archive for ocean silica content provided that suitable skeleton types are selected.
Laurie C. Hofmann and Svenja Heesch
Biogeosciences, 15, 6139–6149,Short summary
The ability of marine macroalgae to adapt to changing ocean chemistry will depend on the flexibility of their inorganic carbon uptake mechanisms across biogeographic ranges. Therefore, we investigated the plasticity of inorganic carbon uptake mechanisms in north Atlantic rhodoliths – free-living calcifying red algae that form important benthic habitats in coastal environments. We observed flexible mechanisms related to seawater DIC concentrations, indicating the potential for adaptation.
Jacqueline Bertlich, Dirk Nürnberg, Ed C. Hathorne, Lennart J. de Nooijer, Eveline M. Mezger, Markus Kienast, Steffanie Nordhausen, Gert-Jan Reichart, Joachim Schönfeld, and Jelle Bijma
Biogeosciences, 15, 5991–6018,
Jill N. Sutton, Gregory F. de Souza, Maribel I. García-Ibáñez, and Christina L. De La Rocha
Biogeosciences, 15, 5663–5676,Short summary
The silicon stable isotope distribution determined from samples collected from the North Atlantic Ocean indicates that water mass subduction and circulation are the dominant processes controlling the distribution of dissolved silicon in this region. In addition, these data provide a clear view of the direct interaction between northern and southern water masses and the extent to which the silicon isotope composition of these silica-poor waters is influenced by hydrography.
Maxi Castrillejo, Núria Casacuberta, Marcus Christl, Christof Vockenhuber, Hans-Arno Synal, Maribel I. García-Ibáñez, Pascale Lherminier, Géraldine Sarthou, Jordi Garcia-Orellana, and Pere Masqué
Biogeosciences, 15, 5545–5564,Short summary
The investigation of water mass transport pathways and timescales is important to understand the global ocean circulation. Following earlier studies, we use artificial radionuclides introduced to the oceans in the 1950s to investigate the water transport in the subpolar North Atlantic (SPNA). For the first time, we combine measurements of the long-lived iodine-129 and uranium-236 to confirm earlier findings/hypotheses and to better understand shallow and deep ventilation processes in the SPNA.
Gustaf Granath, Håkan Rydin, Jennifer L. Baltzer, Fia Bengtsson, Nicholas Boncek, Luca Bragazza, Zhao-Jun Bu, Simon J. M. Caporn, Ellen Dorrepaal, Olga Galanina, Mariusz Gałka, Anna Ganeva, David P. Gillikin, Irina Goia, Nadezhda Goncharova, Michal Hájek, Akira Haraguchi, Lorna I. Harris, Elyn Humphreys, Martin Jiroušek, Katarzyna Kajukało, Edgar Karofeld, Natalia G. Koronatova, Natalia P. Kosykh, Mariusz Lamentowicz, Elena Lapshina, Juul Limpens, Maiju Linkosalmi, Jin-Ze Ma, Marguerite Mauritz, Tariq M. Munir, Susan M. Natali, Rayna Natcheva, Maria Noskova, Richard J. Payne, Kyle Pilkington, Sean Robinson, Bjorn J. M. Robroek, Line Rochefort, David Singer, Hans K. Stenøien, Eeva-Stiina Tuittila, Kai Vellak, Anouk Verheyden, James Michael Waddington, and Steven K. Rice
Biogeosciences, 15, 5189–5202,Short summary
Peat constitutes a long-term archive for climate reconstruction by using the isotopic composition of carbon and oxygen. We analysed isotopes in two peat moss species across North America and Eurasia. Peat (moss tissue) isotope composition was predicted by soil moisture and isotopic composition of the rainwater but differed between species. Our results suggest that isotope composition can be used on a large scale for climatic reconstructions but that such models should be species-specific.
Joshua A. Haslun, Nathaniel E. Ostrom, Eric L. Hegg, and Peggy H. Ostrom
Biogeosciences, 15, 3873–3882,Short summary
N2O δ15N and δ18O values changed non-linearly during in vitro N2O production by bacterial denitrification of NO3−, an argument against their use in N2O apportionment. We present a novel approach for describing non-linear isotopic behaviour, which may be applied to other multi-step reactions. We also show that the intramolecular distribution of 15N in N2O, used to apportion N2O emissions to denitrification and nitrification, is unaffected by electron donor source and electron donor concentration.
Abbot, I. A. and Hollenberg, G.: Marine algae of California, Standford University Press, California, 827 pp., 1976.
Aguilar-Rosas, L. E. and Aguilar-Rosas, R.: Ficogeografía de las algas pardas (Phaeophyta) de la península de Baja California, in: Biodiversidad Marina y Costera de México, Comisión Nacional Biodiversidad y Centro de Investigaciones de Quintana Roo, México, edited by: Salazar-Vallejo, S. I. and González, N. E., 197–206, 1993.
Álvarez-Borrego, S.: Gulf of California, in: Ecosystems of the World, edited by: Ketchum, B. H., Estuaries and Enclosed Seas, Elsevier, Amsterdam, 427–449, 1983.
Axelsson, L., Larsson, C., and Ryberg, H.: Affinity, capacity and oxygen sensitivity of two different mechanisms for bicarbonate utilization in Ulva lactuca L. (Chlorophyta), Plant Cell Environ., 22, 969–978, https://doi.org/10.1046/j.1365-3040.1999.00470.x, 1999.
Balata, D., Piazzi, L., and Rindi, F.: Testing a new classification of morphological functional groups of marine macroalgae for the detection of responses to stress, Mar. Biol., 158, 2459–2469, https://doi.org/10.1007/s00227-011-1747-y, 2011.
Bastidas-Salamanca, M., Gonzalez-Silvera, A., Millán-Núñez, R., Santamaria-del-Angel, E., and Frouin, R.: Bio-optical characteristics of the Northern Gulf of California during June 2008, Int. J. Oceanogr., 2014, 384618, https://doi.org/10.1155/2014/384618, 2014.
Bauwe, H., Hagemann, M., and Fernie, A. R.: Photorespiration: players, partners and origin, Trends Plant Sci., 15, 330–336, https://doi.org/10.1016/j.tplants.2010.03.006, 2010.
Beardall, J. and Giordano, M.: Ecological implications of microalgal and cyanobacterial CO2 concentrating mechanisms, and their regulation, Funct. Plant Biol., 29, 335–347, https://doi.org/10.1071/PP01195, 2002.
Bold, C. H. and Wynne, J. M.: Introduction to the Algae: Structure and reproduction, Prentice-Hall, Incorporated, New Jersey, USA, 706 pp., 1978.
Borowitzka, M. A. and Larkum, A. W. D.: Calcification in green alga Halimeda. III. Sources of inorganic carbon for photosynthesis and calcification and a model of mechanism of calcification, J. Exp. Bot., 27, 879–893, 1976.
Bowes, G. W.: Carbonic anhydrase in marine algae, Plant Physiol., 44, 726–732, https://doi.org/10.1104/pp.44.5.726, 1969.
Bray, N. A.: Thermohaline circulation in the Gulf of California, J. Geophys. Res.-Oceans., 93, 4993–5020, https://doi.org/10.1029/JC093iC05p04993, 1988.
Brodeur, J. R., Chen, B., Su, J., Xu, Y. Y., Hussain, N., Scaboo, K. M., Zhang, Y., Testa, J. M., and Cai, W. J.: Chesapeake Bay inorganic carbon: Spatial distribution and seasonal variability, Front. Mar. Sci., 6, 1–17, https://doi.org/10.3389/fmars.2019.00099, 2019.
Brusca, R. C., Findley, L. T., Hastings, P. A., Hendrickx, M. E., Cosio, J. T., and van der Heiden, A. M.: Macrofaunal diversity in the Gulf of California, in: Biodiversity, ecosystems, and conservation in Northern Mexico, 2005.
Burlacot, A., Burlacot, F., Li-Beisson, Y., and Peltier, G.: Membrane inlet mass spectrometry: a powerful tool for algal research, Front. Plant Sci., 11, 1302, https://doi.org/10.3389/fmicb.2019.01356, 2020.
Burnham, K. P. and Anderson, D. R.: A practical information-theoretic approach, Model selection and multimodel inference, 2nd Edn., Springer, New York, 2002.
Carrillo, L. and Palacios-Hernández, E.: Seasonal evolution of the geostrophic circulation in the northern Gulf of California, Estuar. Coast. Shelf S., 54, 157–173, https://doi.org/10.1006/ecss.2001.0845, 2002.
Carvalho, M. C. and Eyre, B. D.: Carbon stable isotope discrimination during respiration in three seaweed species, Mar. Ecol.-Prog. Ser., 437, 41–49, https://doi.org/10.3354/meps09300, 2011.
Carvalho, M. C., Hayashizaki, K., Ogawa, H., and Kado, R.: Preliminary evidence of growth influence on carbon stable isotope composition of Undaria pinnatifida, Mar. Res. Indones., 32, 185–188, 2007.
Carvalho, M. C., Hayashizaki, K., and Ogawa, H.: Carbon stable isotope discrimination: a possible growth index for the kelp Undaria pinnatifida, Mar. Ecol.-Prog. Ser., 381, 71–82, https://doi.org/10.3354/meps07948, 2009a.
Carvalho, M. C., Hayashizaki, K. I., and Ogawa, H.: Short-term measurement of carbon stable isotope discrimination in photosynthesis and respiration by aquatic macrophytes, with marine macroalgal examples, J. Phycol., 45, 761–770, 2009b.
Carvalho, M. C., Hayashizaki, K., and Ogawa, H.: Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida, Coast. Mar. Sci., 34, 135–139, 2010a.
Carvalho, M. C., Hayashizaki, K., and Ogawa, H.: Temperature effect on carbon isotopic discrimination by Undaria pinnatifida (Phaeophyta) in a closed experimental system, J. Phycol., 46, 1180–1186, https://doi.org/10.1111/j.1529-8817.2010.00895.x, 2010b.
Carvalho, M. C., Santos, I. R., Maher, D. T., Cyronak, T., McMahon, A., Schulz, K. G., and Eyre, B. D.: Drivers of carbon isotopic fractionation in a coral reef lagoon: Predominance of demand over supply, Geochim. Cosmochim. Ac., 153, 105–115, https://doi.org/10.1016/j.gca.2015.01.012, 2015.
Cerling, T. E., Wang, Y., and Quade, J.: Expansion of C4 ecosystems as an indicator of global ecological change in the late Miocene, Nature, 361, 344–345, https://doi.org/10.1038/361344a0, 1993.
Chanton, J. P. and Lewis, F. G.: Plankton and dissolved inorganic carbon isotopic composition in a river-dominated estuary: Apalachicola Bay, Florida, Estuaries, 22, 575–583, https://doi.org/10.2307/1353045, 1999.
CNA (Comisión Nacional del Agua): Atlas del agua en México, available at: https://www.gob.mx/cms/uploads/attachment/file/259372/_2012_EAM2012.pdf, (last access: 5 November 2019) 2012.
Comeau, S., Carpenter, R. C., and Edmunds, P. J.: Coral reef calcifiers buffer their response to ocean acidification using both bicarbonate and carbonate, Proc. Bio. Sci., 280, 20122374, https://doi.org/10.1098/rspb.2012.2374, 2012.
Cooper, L. W. and DeNiro, M. J.: Stable carbon isotope variability in the seagrass Posidonia oceanica: Evidence for light intensity effects, Mar. Ecol.-Prog. Ser., 50, 225–229, 1989.
Cornelisen, C. D., Wing, S. R., Clark, K. L., Hamish Bowman, M., Frew, R. D., and Hurd, C. L.: Patterns in the δ13C and δ15N signature of Ulva pertusa: interaction between physical gradients and nutrient source pools, Limnol. Oceanogr., 52, 820–832, 2007.
Cornwall, C. E., Revill, A. T., and Hurd, C. L.: High prevalence of diffusive uptake of CO2 by macroalgae in a temperate subtidal ecosystem, Photosynth. Res., 124, 181–190, https://doi.org/10.1007/s11120-015-0114-0, 2015.
Cornwall, C. E., Comeau, S., and McCulloch, M. T.: Coralline algae elevate pH at the site of calcification under ocean acidification, Glob. Change Biol., 23, 4245–4256, 2017.
Dawson, E. Y.: The marine algae of the Gulf of California, Allan Hancock Pac. Exped., 3, 189–453, 1944.
Dawson, E. Y.: Marine red algae of Pacific México. Part 2. Cryptonemiales (cont.), Allan Hancock Pac. Exped., 17, 241–397, 1954.
Dawson, E. Y.: How to know the seaweeds, W.M.C. Brown Co. Publishers, Dubuque, Iowa, USA, 197 pp., 1956.
Dawson, E. Y.: The marine red algae of Pacific Mexico, Part 4, Gigartinales, Allan Hancock Pac. Exped., 2, 191–343, 1961.
Dawson, E. Y.: Marine red algae of Pacific México. Part 7. Ceramiales: Ceramiaceae, Delesseriaceae, Allan Hancock Pac. Exped., 26, 1–207, 1962.
Dawson, E. Y.: Marine red algae of Pacific México. Part 8. Ceramiales: Dasyaceae, Rhodomelaceae, Nova Hedwigia, 6, 437–476, 1963.
Díaz-Pulido, G., Cornwall, C., Gartrell, P., Hurd, C., and Tran, D. V.: Strategies of dissolved inorganic carbon use in macroalgae across a gradient of terrestrial influence: implications for the Great Barrier Reef in the context of ocean acidification, Coral Reefs, 35, 1327–1341, https://doi.org/10.1007/s00338-016-1481-5, 2016.
Digby, P. S. B.: Growth and calcification in coralline algae, Clathromorphum circumscriptum and Corallina officinalis, and significance of pH in relation to precipitation, J. Mar. Biol. Assoc. UK, 57, 1095–109, https://doi.org/10.1017/S0025315400026151, 1977.
Doubnerová, V. and Ryšlavá, H.: What can enzymes of C4 photosynthesis do for C3 plants under stress?, Plant Sci., 180, 575–583, https://doi.org/10.1016/j.plantsci.2010.12.005, 2011.
Douchi, D., Liang, F., Cano, M., Xiong, W., Wang, B., Maness, P. C., Lindblad, P., and Yu, J.: Membrane-Inlet Mass Spectrometry enables a quantitative understanding of inorganic carbon uptake flux and carbon concentrating mechanisms in metabolically engineered cyanobacteria, Front. Microbiol., 10, 1356–1356, https://https://doi.org/10.3389/fmicb.2019.01356, 2019.
Draper, N. R. and Smith, H.: Applied regression analysis, Vol. 326, John Wiley and Sons, New Jersey, USA, 1–715, ISBN 0-471-17082-8, 1998.
Drechsler, Z. and Beer, S.: Utilization of inorganic carbon by Ulva lactuca, Plant Physiol., 97, 1439–1444, https://doi.org/10.1104/pp.97.4.1439, 1991.
Drechsler, Z., Sharkia, R., Cabantchik, Z. I., and Beer, S.: Bicarbonate uptake in the marine macroalga Ulva sp. is inhibited by classical probes of anion exchange by red blood cells, Planta, 191, 34–40, https://doi.org/10.1007/BF00240893, 1993.
Dreckmann, K. M.: El género Gracilaria (Gracilariaceae, Rhodophyta) en el Pacífico centro-sur mexicano, Monografías ficológicas, 1, 77–118, 2002.
Dudgeon, S. R., Davison, I. R., and Vadas, R. L.: Freezing tolerance in the intertidal red algae Chondrus crispus and Mastocarpus stellatus: Relative importance of acclimation and adaptation, Mar Biol., 106, 427–436, https://doi.org/10.1007/BF01344323, 1990.
Dudley, B. D., Barr, N. G., and Shima, J. S.: Influence of light intensity and nutrient source on δ13C and δ15N signatures in Ulva pertusa, Aquat. Biol., 9, 85–93, https://doi.org/10.3354/AB00241, 2010.
Ehleringer, J. R., Sage, R. F., Flanagan, L. B., and Pearcy, R. W.: Climate change and the evolution of C4 photosynthesis, Trends Ecol. Evol., 6, 95–99, https://doi.org/10.1073/pnas.1718988115, 1991.
Enríquez, S. and Rodríguez-Román, A.: Effect of water flow on the photosynthesis of three marine macrophytes from a fringing-reef lagoon, Mar. Ecol.-Prog. Ser., 323, 119–132, https://doi.org/10.3354/meps323119, 2006.
Escalante, F., Valdez-Holguín, J. E., Álvarez-Borrego, S., and Lara-Lara, J. R.: Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California, Cienc. Mar., 39, 203–215, 2013.
Espinoza-Avalos, J.: Macroalgas marinas del Golfo de California, Biodiversidad marina y costera de México, Comisión Nacional Biodiversidad, Centro de Investigaciones de Quintana Roo, México, edited by: Salazar-Vallejo, S. I. and González, N. E., 328–357, 1993.
Espinosa-Carreón, T. L. and Escobedo-Urías, D.: South region of the Gulf of California large marine ecosystem upwelling, fluxes of CO2 and nutrients, Environ. Dev., 22, 42–51, https://doi.org/10.1016/j.envdev.2017.03.005, 2017.
Espinosa-Carreón, T. L. and Valdez-Holguín, E.: Variabilidad interanual de clorofila en el Golfo de California, Ecol. Appl., 6, 83–92, 2007.
Fernández, P. A., Hurd, C. L., and Roleda, M. Y.: Bicarbonate uptake via an anion exchange protein is the main mechanism of inorganic carbon acquisition by the giant kelp Macrocystis pyrifera (L aminariales, Phaeophyceae) under variable pH, J. Phycol., 50, 998–1008, https://https://doi.org/10.1111/jpy.12247, 2014.
Fernández, P. A., Roleda, M. Y., and Hurd, C. L.: Effects of ocean acidification on the photosynthetic performance, carbonic anhydrase activity and growth of the giant kelp Macrocystis pyrifera, Photosynth. Res., 124, 293–304, 2015.
Gateau, H., Solymosi, K., Marchand, J., and Schoefs, B.: Carotenoids of microalgae used in food industry and medicine, Mini-Rev. Med. Chem., 17, 1140–1172, https://doi.org/10.2174/1389557516666160808123841, 2017.
Gilbert, J. Y. and Allen, W. E.: The phytoplankton of the Gulf of California obtained by the “E.W. Scripps” in 1939 and 1940, J. Mar. Res., 5, 89–110, https://doi.org/10.1016/0022-0981(67)90008-1, 1943.
Giordano, M., Beardall, J., and Raven, J. A.: CO2 concentrating mechanisms in algae: mechanisms, environmental modulation and evolution, Annu. Rev. Plant Biol., 66, 99–131, https://doi.org/10.1146/annurev.arplant.56.032604.144052, 2005.
Grice, A. M., Loneragan, N. R., and Dennison, W. C.: Light intensity and the interactions between physiology, morphology and stable isotope ratios in five species of seagrass, J. Exp. Mar. Biol. Ecol., 195, 91–110, https://doi.org/10.1016/0022-0981(95)00096-8, 1996.
Gowik, U. and Westhoff, P.: The path from C3 to C4 photosynthesis, Plant Physiol., 155, 56–63, https://doi.org/10.1104/pp.110.165308, 2011.
Harris, D., Horwáth, W. R., and Van Kessel, C.: Acid fumigation of soils to remove carbonates prior to total organic carbon or carbon-13 isotopic analysis, Soil Sci. Soc. Am. J., 65, 1853–1856, https://doi.org/10.2136/sssaj2001.1853, 2001.
Hepburn, C. D., Pritchard, D. W., Cornwall, C. E., McLeod, R. J., Beardall, J., Raven, J. A., and Hurd, C. L.: Diversity of carbon use strategies in a kelp forest community: implications for a high CO2 ocean, Glob. Change Biol., 17, 2488–2497, https://doi.org/10.1111/j.1365-2486.2011.02411.x, 2011.
Hinger, E. N., Santos, G. M., Druffel, E. R. M., and Griffin, S.: Carbon isotope measurements of surface seawater from a time-series site off Southern California, Radiocarbon, 52, 69–89, 2010.
Hiraoka, M., Kinoshita, Y., Higa, M., Tsubaki, S., Monotilla, A. P., Onda, A., and Dan, A.: Fourfold daily growth rate in multicellular marine alga Ulva meridionalis, Sci. Rep.-UK, 10, 1–7, 2020.
Hofmann, L. C. and Heesch, S.: Latitudinal trends in stable isotope signatures and carbon-concentrating mechanisms of northeast Atlantic rhodoliths, Biogeosciences, 15, 6139–6149, https://doi.org/10.5194/bg-15-6139-2018, 2018.
Hopkinson, B. M., Young, J. N., Tansik, A. L., and Binder, B. J.: The minimal CO2 concentrating mechanism of Prochlorococcus MED4 is effective and efficient, Plant Physiol., 166, 2205–2217, https://doi.org/10.1104/pp.114.247049, 2014.
Hurd, C. L.: Water motion, marine macroalgal physiology and production, J. Phycol., 36, 453–472, https://doi.org/10.1046/j.1529-8817.2000.99139.x, 2000.
Iluz, D., Fermani, S., Ramot, M., Reggi, M., Caroselli, E., Prada, F., Dubinsky, Z., Goffredo, S., and Falin, G.: Calcifying response and recovery potential of the brown alga Padina pavonica under ocean acidification, ACS Earth Space Chem., 1, 316–323, https://doi.org/10.1021/acsearthspacechem.7b00051, 2017.
Iñiguez, C., Galmés, J., and Gordillo, F. J.: Rubisco carboxylation kinetics and inorganic carbon utilization in polar versus cold-temperate seaweeds, J. Exp. Bot., 70, 1283–1297, https://doi.org/10.1093/jxb/ery443, 2019.
Sand-Jensen, E. L., Maberly, S. C., and Gontero, B.: Insights on the functions and ecophysiological relevance of the diverse carbonic anhydrases in microalgae, Int. J. Mol. Sci., 21, 2922, https://doi.org/10.3390/ijms21082922, 2020.
Johansson, G. and Snoeijs, P.: Macroalgal photosynthetic responses to light in relation to thallus morphology and depth zonation, Mar. Ecol.-Prog. Ser., 244, 63–72, https://https://doi.org/10.3354/meps244063, 2002.
Kim, M. S., Lee, S. M., Kim, H. J., Lee, S. Y., Yoon, S. H., and Shin, K. H.: Carbon stable isotope ratios of new leaves of Zostera marina in the mid-latitude region: implications of seasonal variation in productivity, J. Exp. Mar. Biol. Ecol., 461, 286–296, https://doi.org/10.1016/j.jembe.2014.08.015, 2014.
Klenell, M., Snoeijs, P., and Pedersen, M.: Active carbon uptake in Laminaria digitata and L. saccharina (Phaeophyta) is driven by a proton pump in the plasma membrane, Hydrobiologia, 514, 41–53, https://doi.org/10.1023/B:hydr.0000018205.80186.3e, 2004.
Kroopnick, P. M.: The distribution of 13C of ΣCO2 in the world oceans, Deep-Sea Res. Pt. I, 32, 57–84, https://doi.org/10.1016/0198-0149(85)90017-2, 1985.
Kübler, J. E. and Davison, I. R.: High-temperature tolerance of photosynthesis in the red alga Chondrus crispus, Mar. Biol., 117, 327–335, https://doi.org/10.1007/BF00345678, 1993.
Kübler, J. E. and Dudgeon, S. R.: Predicting effects of ocean acidification and warming on algae lacking carbon concentrating mechanisms, PLoS One, 10, e0132806, https://doi.org/10.1371/journal.pone.0132806, 2015.
Kübler, J. E. and Raven, J. A.: The interaction between inorganic carbon acquisition and light supply in Palmaria palmata (Rhodophyta), J. Phycol., 31, 369–375, https://doi.org/10.1111/j.0022-3646.1995.00369.x, 1995.
Kübler, J. E. and Raven, J. A.: Inorganic carbon acquisition by red seaweeds grown under dynamic light regimes, Hydrobiologia, 326, 401–406, 1996.
Lapointe, B. E. and Duke, C. S.: Biochemical strategies for growth of Gracilaria tikvahiae (Rhodophyta) in relation to light intensity and nitrogen availability, J. Phycol., 20, 488–495, https://doi.org/10.1111/j.0022-3646.1984.00488.x, 1984.
Littler, M. M. and Arnold, K. E.: Primary productivity of marine macroalgal functional-form groups from south-western North America, J. Phycol., 18, 307–311, https://doi.org/10.1111/j.1529-8817.1982.tb03188.x, 1982.
Littler, M. M. and Littler, D. S.: The evolution of thallus form and survival strategies in benthic marine macroalgae: field and laboratory tests of a functional form model, Am. Nat., 116, 25–44, 1980.
Lobban, C. S. and Harrison, P. J.: Seaweed ecology and physiology, Cambridge University Press, New York, USA, ISBN 9780511626210, 1–366, 1994.
Lovelock, C. E., Reef, R., Raven, J. A., and Pandolfi, J. M.: Regional variation in δ13C of coral reef macroalgae, Limnol. Oceanogr., 65, 2291–2302, https://doi.org/10.1002/lno.11453, 2020.
Lluch-Cota, S. E., Aragón-Noriega, E. A., Arreguín-Sánchez, F., Aurioles-Gamboa, D., Bautista-Romero, J. J., Brusca, R. C., Cervantes-Duarte, R., Cortes-Altamirano, R., Del-MonteLuna, P., Esquivel-Herrera, A., Fernández, G., Hendrickx, M. E., Hernandez-Vazquez, S., Herrera-Cervantes, H., Kahru, M., Lavin, M., Lluch-Belda, D., Lluch-Cota, D. B., López-Martínez, J., Marinone, S. G., Nevarez-Martinez, M. O., Ortega-García, S., Palacios-Castro, E., Pares-Sierra, A., Ponce-Díaz, G., Ramirez-Rodríguez, M., Salinas-Zavala, C. A., Schwartzlose, R. A., and Sierra-Beltrán, A. P.: The Gulf of California: Review of ecosystem status and sustainability challenges, Prog. Oceanogr., 73, 1–26, https://doi.org/10.1016/j.pocean.2007.01.013, 2007.
Maberly, S. C., Raven, J. A., and Johnston, A. M.: Discrimination between 12C and 13C by marine plants, Oecologia, 91, 481–492, https://doi.org/10.1007/BF00650320, 1992.
Mackey, A. P., Hyndes, G. A., Carvalho, M. C., and Eyre, B. D.: Physical and biogeochemical correlates of spatio-temporal variation in the δ13C of marine macroalgae, Estuar. Coast. Shelf S., 157, 7–18, https://doi.org/10.1016/j.ecss.2014.12.040, 2015.
Madsen, T. V. and Maberly, S. C.: High internal resistance to CO2 uptake by submerged macrophytes that use HCO: measurements in air, nitrogen and helium, Photosynth. Res., 77, 183–190, https://doi.org/10.1023/A:1025813515956, 2003.
Marinone, S. G.: A note on “Why does the Ballenas Channel have the coldest SST in the Gulf of California?”, Geophys. Res. Lett., 34, L02607, https://doi.org/10.1029/2006GL028589, 2007.
Marinone, S. G. and Lavín, M. F.: Residual flow and mixing in the large islands' region of the central Gulf of California: Nonlinear processes in geophysical fluid dynamics, Springer, Dordrecht, https://doi.org/10.1007/978-94-010-0074-1_13, 2003.
Marconi, M., Giordano, M., and Raven, J. A.: Impact of taxonomy, geography and depth on the δ13C and δ15N variation in a large collection of macroalgae, J. Phycol., 47, 1023–1035, https://doi.org/10.1111/j.1529-8817.2011.01045.x, 2011.
Martínez-Díaz-de-León, A.: Upper-ocean circulation patterns in the Northern Gulf of California, expressed in Ers-2 synthetic aperture radar imagery, Cienc. Mar., 27, 209–221, https://doi.org/10.7773/cm.v27i2.465, 2001.
Martínez-Díaz-de-León, A., Pacheco-Ruíz, I., Delgadillo-Hinojosa, F., Zertuche-González, J. A., Chee-Barragán, A., Blanco-Betancourt, R., Guzmán-Calderón, J. M., and Gálvez-Telles, A.: Spatial and temporal variability of the sea surface temperature in the Ballenas-Salsipuedes Channel (central Gulf of California), J. Geophys. Res.-Oceans, 111, C02008, https://doi.org/10.1029/2005JC002940, 2006.
Masojidek, J., Kopecká, J., Koblížek, M., and Torzillo, G.: The xanthophyll cycle in green algae (Chlorophyta): its role in the photosynthetic apparatus, Plant Biol., 6, 342–349, https://doi.org/10.1055/s-2004-820884, 2004.
McConnaughey, T. A., Burdett, J., Whelan, J. F., and Paull, C. K.: Carbon isotopes in biological carbonates: respiration and photosynthesis, Geochim. Cosmochim. Ac., 61, 611–622, https://doi.org/10.1016/S0016-7037(96)00361-4, 1997.
Mercado, J. M., De los Santos, C. B., Pérez-Lloréns, J. L., and Vergara, J. J.: Carbon isotopic fractionation in macroalgae from Cadiz Bay (Southern Spain): comparison with other bio-geographic regions, Estuar. Coast. Shelf S., 85, 449–458, https://doi.org/10.1016/j.ecss.2009.09.005, 2009.
Mook, W. G., Bommerson, J. C., and Staverman, W. H.: Carbon isotope fractionation between dissolved bicarbonate and gaseous carbon dioxide, Earth Planet. Sc. Lett., 22, 169–176, https://doi.org/10.1016/0012-821X(74)90078-8, 1974.
Murru, M. and Sandgren, C. D.: Habitat matters for inorganic carbon acquisition in 38 species of red macroalgae (Rhodophyta) from Puget Sound, Washington, USA, J. Phycol., 40, 837–845, https://doi.org/10.1111/j.1529-8817.2004.03182.x, 2004.
Narvarte, B. C. V., Nelson, W. A., and Roleda, M. Y.: Inorganic carbon utilization of tropical calcifying macroalgae and the impacts of intensive mariculture-derived coastal acidification on the physiological performance of the rhodolith Sporolithon sp., Environ. Pollut., 266, 115344, https://doi.org/10.1016/j.envpol.2020.115344 , 2020.
Nielsen, S. L. and Sand-Jensen, K.: Allometric settling of maximal photosynthetic growth rate to surface/volume ratio, Limnol. Oceanogr., 35, 177–180, https://doi.org/10.4319/lo.1990.35.1.0177, 1990.
Norris, J. N.: The marine algae of the northern Gulf of California, PhD dissertation, University of California, Santa Barbara, 575 pp., 1975.
Norris, J. N.: Studies on Gracilaria Grev.(Gracilariaceae, Rhodophyta) from the Gulf of California, Mexico, Taxonomy of Economic Seaweeds, California Sea Grant College Program, California, Vol. I, 123–135, 1985.
Norris, J. N.: Marine algae of the northern Gulf of California: Chlorophyta and Phaoephyceae, Smithsonian Institution Scholarly Press, Washington DC, USA, no. 94, https://doi.org/10.5479/si.19382812.96, 2010.
Ochoa-Izaguirre, M. J. and Soto-Jiménez, M. F.: Variability in nitrogen stable isotope ratios of macroalgae: consequences for the identification of nitrogen sources, J. Phycol., 51, 46–65, https://doi.org/10.1111/jpy.12250, 2015.
Ochoa-Izaguirre, M. J., Aguilar-Rosas, R., and Aguilar-Rosas, L. E.: Catálogo de Macroalgas de las lagunas costeras de Sinaloa, Serie Lagunas Costeras, edited by: Páez-Osuna, F., UNAM, ICMyL, México, 117 pp., 2007.
Páez-Osuna, F., Piñón-Gimate, A., Ochoa-Izaguirre, M. J., Ruiz-Fernández, A. C., Ramírez-Reséndiz, G., and Alonso-Rodríguez, R.: Dominance patterns in macroalgal and phytoplankton biomass under different nutrient loads in subtropical coastal lagoons of the SE Gulf of California, Mar. Pollut. Bull., 77, 274–281, https://doi.org/10.1016/j.marpolbul.2013.09.048, 2013.
Páez-Osuna, F., Álvarez-Borrego, S., Ruíz-Fernández, A. C., García-Hernández, J., Jara-Marini, E., Bergés-Tiznado, M. E., Piñón-Gimate, A., Alonso-Rodríguez, R., Soto-Jiménez, M. F., Frías-Espericueta, M. G., Ruelas-Inzunza, J. R., Green-Ruíz, C. R., Osuna-Martínez, C. C., and Sánchez-Cabeza, J. A.: Environmental status of the Gulf of California: a pollution review, Earth-Sci. Rev., 166, 181–205, https://doi.org/10.1016/j.earscirev.2016.09.015, 2017.
Pedroche, F. F. and Sentíes, A.: Ficología marina mexicana: Diversidad y Problemática actual, Hidrobiológica, 13, 23–32, 2003.
Quay, P., Sonnerup, R., Westby, T., Stutsman, J., and McNichol, A.: Changes in the 13C/12C of dissolved inorganic carbon in the ocean as a tracer of anthropogenic CO2 uptake, Global Biogeochem. Cy., 17, 1–20, https://doi.org/10.1029/2001GB001817, 2003.
Rautenberger, R., Fernández, P. A., Strittmatter, M., Heesch, S., Cornwall, C. E., Hurd, C. L., and Roleda, M. Y.: Saturating light and not increased carbon dioxide under ocean acidification drive photosynthesis and growth in Ulva rigida (Chlorophyta), Ecol. Evol., 5, 874–888, https://doi.org/10.1002/ece3.1382, 2015.
Raven, J., Beardall, J., and Griffiths, H.: Inorganic C-sources for Lemanea, Cladophora, and Ranunculus in a fast-flowing stream: measurements of gas exchange and of carbon isotope ratio and their ecological implications, Oecologia, 53, 68–78, https://https://doi.org/10.1007/BF00377138, 1982.
Raven, J. A. and Beardall, J.: The ins and outs of CO2, J. Exp. Bot., 67, 1–13, https://doi.org/10.1093/jxb/erv451, 2016.
Raven, J. A., Johnston, A. M., Kübler, J. E., Korb, R. E., McInroy, S. G., Handley, L. L., Scrimgeour, C. M., Walker, D. I., Beardall, J., Clayton, M. N., Vanderklift, M., Fredriksen, S., and Dunton, K. H.: Seaweeds in cold seas: evolution and carbon acquisition, Ann. Bot., 90, 525–536, https://doi.org/10.1093/aob/mcf171, 2002a.
Raven, J. A., Johnshton, A. M., Kübler, J. E., Korb, R. E., Mclnroy, S. G., Handley, L. L., Scrimgeour, C. M., Walker, D. I., Beardall, J., Vanderklift, M., Fredriksen, S., and Dunton, K. H.: Mechanistic interpretation of carbon isotope discrimination by marine macroalgae and seagrasses, Funct. Plant Biol., 29, 355–378, https://doi.org/10.1071/PP01201, 2002b.
Roberts, K., Granum, E., Leegood, R. C., and Raven, J. A.: C3 and C4 pathways of photosynthetic carbon assimilation in marine diatoms are under genetic, not environmental control, Plant Physiol., 145, 230–235, https://doi.org/10.1104/pp.107.102616, 2007.
Robles-Tamayo, C. M., Valdez-Holguín, J. E., García-Morales, R., Figueroa-Preciado, G., Herrera-Cervantes, H., López-Martínez, J., and Enríquez-Ocaña, L. F.: Sea surface temperature (SST) variability of the eastern coastal zone of the gulf of California, Remote Sens., 10, 1434, https://doi.org/10.3390/rs10091434, 2018.
Roden, G. I.: Oceanographic and meteorological aspects of the Gulf of California, Pac. Sci., 12, 21–45, 1958.
Roden, G. I. and Emilsson, L.: Physical oceanography of the Gulf of California, Simposium Golfo de California, Universidad Nacional Autónoma de México, Mazatlán, Sinaloa, México, 1979.
Roden, G. I. and Groves, G. W.: Recent oceanographic investigations in the Gulf of California, J. Mar. Res., 18, 10–35, 1959.
Roleda, M. Y. and Hurd, C. L.: Seaweed responses to ocean acidification, in: Seaweed biology (Novel Insights into Ecophysiology, Ecology and Utilization), edited by: Caldwell, M. M., Heldmaier, G., Jackson, R. B., Lange, O. L., Mooney, H. A., Schulze, E.-D., and Sommer, U., Springer, Berlin, Heidelberg, 407–431, 2012.
Roleda, M. Y., Boyd, P. W., and Hurd, C. L.: Before ocean acidification: calcifier chemistry lessons, J. Phycol., 48, 840–843, 2012.
Rusnak, G. A., Fisher, R. L., and Shepard, F. P.: Bathymetry and faults of Gulf of California, in: Marine Geology of the Gulf of California: A symposium, edited by: van Andel, T. H. and Shor Jr., G. G., AAPG Memoir, Tulsa, OK, USA, 3, 59–75, https://doi.org/10.1306/M3359C3, 1964.
Sand-Jensen, K. and Gordon, D.: Differential ability of marine and freshwater macrophytes to utilize HCO and CO2, Mar. Biol., 80, 247–253, https://doi.org/10.1111/j.1469-8137.1981.tb03198.x, 1984.
Sanford, L. P. and Crawford, S. M.: Mass transfer versus kinetic control of uptake across solid-water boundaries, Limnol. Oceanogr., 45, 1180–1186, https://doi.org/10.4319/lo.2000.45.5.1180, 2000.
Santamaría-del-Angel, E., Alvarez-Borrego, S., and Müller-Karger, F. E.: Gulf of California biogeographic regions based on coastal zone color scanner imagery, J. Geophys. Res., 99, 7411–7421, https://doi.org/10.1029/93JC02154, 1994.
Santos, G. M., Ferguson, J., Acaylar, K., Johnson, K. R., Griffin, S., and Druffel, E.: Δ14C and δ13C of seawater DIC as tracers of coastal upwelling: A 5-year time series from Southern California, Radiocarbon, 53, 669–677, https://doi.org/10.1017/S0033822200039126, 2011.
Setchell, W. and Gardner, N.: The marine algae of the Pacific Coast of North America. Part II Chlorophyceae, Univ. Calif. Publ. Bot., 8, 139–374, https://doi.org/10.5962/bhl.title.5719, 1920.
Setchell, W. and Gardner, N.: The marine algae: Expedition of the California Academy of Sciences to the Gulf of California in 1921, Proc. Calif. Acad. Sci., 4th series, California Academy of Sciences, San Francisco, CA, USA, 12, 695–949, 1924.
Sharkey, T. D. and Berry, J. A.: Carbon isotope fractionation of algae as influenced by an inducible CO2 concentrating mechanism, Inorganic carbon uptake by aquatic photosynthetic organisms, American Society of Plant Physiologists, Rockville, MD, USA, 389–401, 1985.
Soto-Jimenez, M. F., Velázquez-Ochoa, R., and Ochoa Izaguirre, M. J.: Analysis of the variation of stable carbon isotopes in macroalgae communities from shallow marine habitats in the Gulf of California ecoregion, Earth and Space Science Open Archive ESSOAr, https://doi.org/10.1002/essoar.10504972.1, online first, 2020.
Stepien, C. C.: Impacts of geography, taxonomy and functional group on inorganic carbon use patterns in marine macrophytes, J. Ecol., 103, 1372–1383, https://doi.org/10.1111/1365-2745.12451, 2015.
Stroup, W. W., Milliken, G. A., Claassen, E. A., and Wolfinger, R. D.: SAS for mixed models: introduction and basic applications, SAS Institute, Cary, NC, USA, 1–48, 2018.
Teichberg, M., Fox, S. E., Olsen, Y. S., Valiela, I., Martinetto, P., Iribarne, O., Muto, E. Y., Petti, M. A., Cobrisier, T. N., Soto-Jiménez, M., Páez-Osuna, F., Castro, P., Freitas, H., Zitelli, A., Cardinaletti, M., and Tagliapietra, D.: Eutrophication and macroalgal blooms in temperate and tropical coastal waters: nutrient enrichment experiments with Ulva spp., Glob. Change Biol., 16, 2624–2637, https://doi.org/10.1111/j.1365-2486.2009.02108.x, 2010.
Valiela, I., Liu, D., Lloret, J., Chenoweth, K., and Hanacek, D.: Stable isotopic evidence of nitrogen sources and C4 metabolism driving the world's largest macroalgal green tides in the Yellow Sea, Sci. Rep., 8, 1–12, https://doi.org/10.1038/s41598-018-35309-3, 2018.
Vásquez-Elizondo, R. M. and Enríquez, S.: Light absorption in coralline algae (Rhodophyta): a morphological and functional approach to understanding species distribution in a coral reef lagoon, Front. Mar. Sci., 4, 297, https://doi.org/10.3389/fmars.2017.00297, 2017.
Velasco-Fuentes, O. V. and Marinone, S. G.: A numerical study of the Lagrangian circulation in the Gulf of California, J. Marine Syst., 22, 1–12, https://doi.org/10.1016/S0924-7963(98)00097-9, 1999.
Young, E. B. and Beardall, J.: Modulation of photosynthesis and inorganic carbon acquisition in a marine microalga by nitrogen, iron, and light availability, Can. J. Bot., 83, 917–928, https://doi.org/10.1139/b05-081, 2005.
Young, J. N., Heureux, A. M., Sharwood, R. E., Rickaby, R. E., Morel, F. M., and Whitney, S. M.: Large variation in the Rubisco kinetics of diatoms reveals diversity among their carbon-concentrating mechanisms, J. Exp. Bot., 67, 3445–3456, https://doi.org/10.1093/jxb/erw163, 2016.
Xu, J., Fan, X., Zhang, X., Xu, D., Mou, S., Cao, S., Zheng, Z., Miao, J., and Ye, N.: Evidence of coexistence of C3 and C4 photosynthetic pathways in a green-tide-forming alga, Ulva prolifera, PloS one, 7, e37438, https://doi.org/10.1371/journal.pone.0037438, 2012.
Xu, J., Zhang, X., Ye, N., Zheng, Z., Mou, S., Dong, M., Xu, D., and Miao, J.: Activities of principal photosynthetic enzymes in green macroalga Ulva linza: functional implication of C4 pathway in CO2 assimilation, Sci. China Life Sci., 56, 571–580, https://doi.org/10.1007/s11427-013-4489-x, 2013.
Wiencke, C. and Fischer, G.: Growth and stable carbon isotope composition of cold-water macroalgae in relation to light and temperature, Mar. Ecol.-Prog. Ser., 65, 283–292, 1990.
Wilkinson, T. E., Wiken, E., Creel, J. B., Hourigan, T. F., and Agardy, T.: Marine Ecoregions of North America, Commission of Environmental Cooperation, Montreal, Canada, Montreal, Canada, 1–177, 2009.
Zabaleta, E., Martin, M. V., and Braun, H. P.: A basal carbon concentrating mechanism in plants?, Plant Sci., 187, 97–104, https://doi.org/10.1016/j.plantsci.2012.02.001, 2012.
Zeebe, R. E. and Wolf-Gladrow, D.: CO2 in seawater: equilibrium, kinetics, isotopes, No. 65, Gulf Professional Publishing, Elsevier Oceanography Series, Oxford, United Kingdom, 1–341, 2001.
Zeitzschel, B.: Primary productivity in the Gulf of California, Mar. Biol., 3, 201–207, https://doi.org/10.1007/BF00360952, 1969.
Zou, D., Xia, J., and Yang, Y.: Photosynthetic use of exogenous inorganic carbon in the agarophyte Gracilaria lemaneiformis (Rhodophyta), Aquaculture, 237, 421–431, https://doi.org/10.1016/j.aquaculture.2004.04.020, 2004.
Our research is the first approximation to understand the δ13C macroalgal variability in one of the most diverse marine ecosystems in the world, the Gulf of California. The life-form is the principal cause of δ13C macroalgal variability, mainly taxonomy. However, changes in habitat characteristics and environmental conditions also influence the δ13C macroalgal variability. The δ13C macroalgae is indicative of carbon concentration mechanisms and isotope discrimination during carbon assimilation.
Our research is the first approximation to understand the δ13C macroalgal variability in one of...