Articles | Volume 19, issue 3
https://doi.org/10.5194/bg-19-877-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-877-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Feb 2022
Research article |
| 11 Feb 2022
| 11 Feb 2022
Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains
Yuwei Liu
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Zhuanxia Zhang
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Zhigang Sun
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Leilei Yong
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Liyuan Sang
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Lei Wang
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
Kailiang Zhao
School of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, Gansu, China
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Revised manuscript not accepted
Short summary
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We analyzed the stable isotopic composition of surface water and estimated its evaporative loss in the Shiyang River Basin. The characteristics of stable isotopes in surface water show a gradual enrichment from mountainous areas to deserts, and the evaporation loss of surface water also shows a gradually increasing trend from upstream to downstream. The study of evaporative losses in the river-lake continuum contributes to the sustainable use of water resources.
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Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2021-79, https://doi.org/10.5194/essd-2021-79, 2021
Revised manuscript not accepted
Short summary
Short summary
We have established a stable water isotope monitoring network in the Shiyang River Basin. The monitoring station with six observation systems: river source area, oasis area, reservoir canal system area, oasis farmland area, ecological restoration area and salinized area.The data set includes the stable water isotopes of different water bodies and the meteorological and hydrological data in the Shiyang River Basin. So far, the data have been obtained for five consecutive years.
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Knowledge of carbon isotope fractionation is important for the assessment of the pathways involved in the degradation of organic matter. Propionate is an important intermediate. In the presence of sulfate, it was degraded by Syntrophobacter species via acetate to CO2. In the absence of sulfate, it was mainly consumed by Smithella and methanogenic archaeal species via butyrate and acetate to CH4. However, stable carbon isotope fractionation during the degradation process was quite small.
Alessandro Zanchetta, Linda M. J. Kooijmans, Steven van Heuven, Andrea Scifo, Hubertus A. Scheeren, Ivan Mammarella, Ute Karstens, Jin Ma, Maarten Krol, and Huilin Chen
Biogeosciences, 20, 3539–3553, https://doi.org/10.5194/bg-20-3539-2023, https://doi.org/10.5194/bg-20-3539-2023, 2023
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Carbonyl sulfide (COS) has been suggested as a tool to estimate carbon dioxide (CO2) uptake by plants during photosynthesis. However, understanding its sources and sinks is critical to preventing biases in this estimate. Combining observations and models, this study proves that regional sources occasionally influence the measurements at the 60 m tall Lutjewad tower (1 m a.s.l.; 53°24′ N, 6°21′ E) in the Netherlands. Moreover, it estimates nighttime COS fluxes to be −3.0 ± 2.6 pmol m−2 s−1.
Joel T. Bostic, David M. Nelson, and Keith N. Eshleman
Biogeosciences, 20, 2485–2498, https://doi.org/10.5194/bg-20-2485-2023, https://doi.org/10.5194/bg-20-2485-2023, 2023
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Land-use changes can affect water quality. We used tracers of pollution sources and water flow paths to show that an urban watershed exports variable sources during storm events relative to a less developed watershed. Our results imply that changing precipitation patterns combined with increasing urbanization may alter sources of pollution in the future.
Robin Havas, Christophe Thomazo, Miguel Iniesto, Didier Jézéquel, David Moreira, Rosaluz Tavera, Jeanne Caumartin, Elodie Muller, Purificación López-García, and Karim Benzerara
Biogeosciences, 20, 2405–2424, https://doi.org/10.5194/bg-20-2405-2023, https://doi.org/10.5194/bg-20-2405-2023, 2023
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Dissolved organic carbon (DOC) is a reservoir of prime importance in the C cycle of both continental and marine systems. It has also been suggested to influence the past Earth climate but is still poorly characterized in ancient-Earth-like environments. In this paper we show how DOC analyses from modern redox-stratified lakes can evidence specific metabolic reactions and environmental factors and how these can help us to interpret the C cycle of specific periods in the Earth's past.
Robin Havas, Christophe Thomazo, Miguel Iniesto, Didier Jézéquel, David Moreira, Rosaluz Tavera, Jeanne Caumartin, Elodie Muller, Purificación López-García, and Karim Benzerara
Biogeosciences, 20, 2347–2367, https://doi.org/10.5194/bg-20-2347-2023, https://doi.org/10.5194/bg-20-2347-2023, 2023
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We describe the C cycle of four modern stratified water bodies from Mexico, a necessary step to better understand the C cycle of primitive-Earth-like environments, which were dominated by these kinds of conditions. We highlight the importance of local external factors on the C cycle of these systems. Notably, they influence the sensitivity of the carbonate record to environmental changes. We also show the strong C-cycle variability among these lakes and their organic C sediment record.
Yifan Ma, Kuanbo Zhou, Weifang Chen, Junhui Chen, Jin-Yu Terence Yang, and Minhan Dai
Biogeosciences, 20, 2013–2030, https://doi.org/10.5194/bg-20-2013-2023, https://doi.org/10.5194/bg-20-2013-2023, 2023
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We distinguished particulate organic carbon (POC) export fluxes out of the nutrient-depleted layer (NDL) and the euphotic zone. The amount of POC export flux at the NDL base suggests that the NDL could be a hotspot of particle export. The substantial POC export flux at the NDL base challenges traditional concepts that the NDL was limited in terms of POC export. The dominant nutrient source for POC export fluxes should be subsurface nutrients, which was determined by 15N isotopic mass balance.
Clémence Paul, Clément Piel, Joana Sauze, Nicolas Pasquier, Frédéric Prié, Sébastien Devidal, Roxanne Jacob, Arnaud Dapoigny, Olivier Jossoud, Alexandru Milcu, and Amaëlle Landais
Biogeosciences, 20, 1047–1062, https://doi.org/10.5194/bg-20-1047-2023, https://doi.org/10.5194/bg-20-1047-2023, 2023
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To improve the interpretation of the δ18Oatm and Δ17O of O2 in air bubbles in ice cores, we need to better quantify the oxygen fractionation coefficients associated with biological processes. We performed a simplified analogue of the terrestrial biosphere in a closed chamber. We found a respiration fractionation in agreement with the previous estimates at the microorganism scale, and a terrestrial photosynthetic fractionation was found. This has an impact on the estimation of the Dole effect.
Adam Francis, Raja S. Ganeshram, Robyn E. Tuerena, Robert G. M. Spencer, Robert M. Holmes, Jennifer A. Rogers, and Claire Mahaffey
Biogeosciences, 20, 365–382, https://doi.org/10.5194/bg-20-365-2023, https://doi.org/10.5194/bg-20-365-2023, 2023
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Climate change is causing extensive permafrost degradation and nutrient releases into rivers with great ecological impacts on the Arctic Ocean. We focused on nitrogen (N) release from this degradation and associated cycling using N isotopes, an understudied area. Many N species are released at degradation sites with exchanges between species. N inputs from permafrost degradation and seasonal river N trends were identified using isotopes, helping to predict climate change impacts.
Mohamed Ayache, Jean-Claude Dutay, Kazuyo Tachikawa, Thomas Arsouze, and Catherine Jeandel
Biogeosciences, 20, 205–227, https://doi.org/10.5194/bg-20-205-2023, https://doi.org/10.5194/bg-20-205-2023, 2023
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The neodymium (Nd) is one of the most useful tracers to fingerprint water mass provenance. However, the use of Nd is hampered by the lack of adequate quantification of the external sources. Here, we present the first simulation of dissolved Nd concentration and Nd isotopic composition in the Mediterranean Sea using a high-resolution model. We aim to better understand how the various external sources affect the Nd cycle and particularly assess how it is impacted by atmospheric inputs.
Marta Santos-Garcia, Raja S. Ganeshram, Robyn E. Tuerena, Margot C. F. Debyser, Katrine Husum, Philipp Assmy, and Haakon Hop
Biogeosciences, 19, 5973–6002, https://doi.org/10.5194/bg-19-5973-2022, https://doi.org/10.5194/bg-19-5973-2022, 2022
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Terrestrial sources of nitrate are important contributors to the nutrient pool in the fjords of Kongsfjorden and Rijpfjorden in Svalbard during the summer, and they sustain most of the fjord primary productivity. Ongoing tidewater glacier retreat is postulated to favour light limitation and less dynamic circulation in fjords. This is suggested to encourage the export of nutrients to the middle and outer part of the fjord system, which may enhance primary production within and in offshore areas.
Marlene Dordoni, Michael Seewald, Karsten Rinke, Kurt Friese, Robert van Geldern, Jakob Schmidmeier, and Johannes A. C. Barth
Biogeosciences, 19, 5343–5355, https://doi.org/10.5194/bg-19-5343-2022, https://doi.org/10.5194/bg-19-5343-2022, 2022
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Organic matter (OM) turnover into dissolved inorganic carbon (DIC) was investigated by means of carbon isotope mass balances in Germany's largest water reservoir. This includes a metalimnetic oxygen minimum (MOM). Autochthonous particulate organic carbon (POC) was the main contributor to DIC, with rates that were highest for the MOM. Generally low turnover rates outline the environmental fragility of this water body in the case that OM loads increase due to storm events or land use changes.
Frédérique M. S. A. Kirkels, Hugo J. de Boer, Paulina Concha Hernández, Chris R. T. Martes, Marcel T. J. van der Meer, Sayak Basu, Muhammed O. Usman, and Francien Peterse
Biogeosciences, 19, 4107–4127, https://doi.org/10.5194/bg-19-4107-2022, https://doi.org/10.5194/bg-19-4107-2022, 2022
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The distinct carbon isotopic values of C3 and C4 plants are widely used to reconstruct past hydroclimate, where more C3 plants reflect wetter and C4 plants drier conditions. Here we examine the impact of regional hydroclimatic conditions on plant isotopic values in the Godavari River basin, India. We find that it is crucial to identify regional plant isotopic values and consider drought stress, which introduces a bias in C3 / C4 plant estimates and associated hydroclimate reconstructions.
Mhlangabezi Mdutyana, Tanya Marshall, Xin Sun, Jessica M. Burger, Sandy J. Thomalla, Bess B. Ward, and Sarah E. Fawcett
Biogeosciences, 19, 3425–3444, https://doi.org/10.5194/bg-19-3425-2022, https://doi.org/10.5194/bg-19-3425-2022, 2022
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Nitrite-oxidizing bacteria in the winter Southern Ocean show a high affinity for nitrite but require a minimum (i.e., "threshold") concentration before they increase their rates of nitrite oxidation significantly. The classic Michaelis–Menten model thus cannot be used to derive the kinetic parameters, so a modified equation was employed that also yields the threshold nitrite concentration. Dissolved iron availability may play an important role in limiting nitrite oxidation.
Weitian Ding, Urumu Tsunogai, Fumiko Nakagawa, Takashi Sambuichi, Hiroyuki Sase, Masayuki Morohashi, and Hiroki Yotsuyanagi
Biogeosciences, 19, 3247–3261, https://doi.org/10.5194/bg-19-3247-2022, https://doi.org/10.5194/bg-19-3247-2022, 2022
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Excessive leaching of nitrate from forested catchments during storm events degrades water quality and causes eutrophication in downstream areas. Thus, tracing the source of nitrate increase during storm events in forested streams is important for sustainable forest management. Based on the isotopic compositions of stream nitrate, including Δ17O, this study clarifies that the source of stream nitrate increase during storm events was soil nitrate in the riparian zone.
Nicolas Séon, Romain Amiot, Guillaume Suan, Christophe Lécuyer, François Fourel, Fabien Demaret, Arnauld Vinçon-Laugier, Sylvain Charbonnier, and Peggy Vincent
Biogeosciences, 19, 2671–2681, https://doi.org/10.5194/bg-19-2671-2022, https://doi.org/10.5194/bg-19-2671-2022, 2022
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We analysed the oxygen isotope composition of bones and teeth of four marine species possessing regional heterothermies. We observed a consistent link between oxygen isotope composition and temperature heterogeneities recorded by classical methods. This opens up new perspectives on the determination of the thermoregulatory strategies of extant marine vertebrates where conventional methods are difficult to apply, but also allows us to investigate thermophysiologies of extinct vertebrates.
Roberto Velázquez-Ochoa, María Julia Ochoa-Izaguirre, and Martín Federico Soto-Jiménez
Biogeosciences, 19, 1–27, https://doi.org/10.5194/bg-19-1-2022, https://doi.org/10.5194/bg-19-1-2022, 2022
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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.
Raquel F. Flynn, Thomas G. Bornman, Jessica M. Burger, Shantelle Smith, Kurt A. M. Spence, and Sarah E. Fawcett
Biogeosciences, 18, 6031–6059, https://doi.org/10.5194/bg-18-6031-2021, https://doi.org/10.5194/bg-18-6031-2021, 2021
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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, https://doi.org/10.5194/bg-18-5891-2021, https://doi.org/10.5194/bg-18-5891-2021, 2021
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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, https://doi.org/10.5194/bg-18-5351-2021, https://doi.org/10.5194/bg-18-5351-2021, 2021
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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, https://doi.org/10.5194/bg-18-4733-2021, https://doi.org/10.5194/bg-18-4733-2021, 2021
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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, https://doi.org/10.5194/bg-18-4629-2021, https://doi.org/10.5194/bg-18-4629-2021, 2021
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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, https://doi.org/10.5194/bg-18-4535-2021, https://doi.org/10.5194/bg-18-4535-2021, 2021
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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, https://doi.org/10.5194/bg-18-4491-2021, https://doi.org/10.5194/bg-18-4491-2021, 2021
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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, https://doi.org/10.5194/bg-18-3539-2021, https://doi.org/10.5194/bg-18-3539-2021, 2021
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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, https://doi.org/10.5194/bg-18-3505-2021, https://doi.org/10.5194/bg-18-3505-2021, 2021
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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, https://doi.org/10.5194/bg-18-3421-2021, https://doi.org/10.5194/bg-18-3421-2021, 2021
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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.
Zixun Chen, Xuejun Liu, Xiaoqing Cui, Yaowen Han, Guoan Wang, and Jiazhu Li
Biogeosciences, 18, 2859–2870, https://doi.org/10.5194/bg-18-2859-2021, https://doi.org/10.5194/bg-18-2859-2021, 2021
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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, https://doi.org/10.5194/bg-18-2325-2021, https://doi.org/10.5194/bg-18-2325-2021, 2021
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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, https://doi.org/10.5194/bg-18-1645-2021, https://doi.org/10.5194/bg-18-1645-2021, 2021
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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, https://doi.org/10.5194/bg-18-805-2021, https://doi.org/10.5194/bg-18-805-2021, 2021
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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, https://doi.org/10.5194/bg-17-6475-2020, https://doi.org/10.5194/bg-17-6475-2020, 2020
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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, https://doi.org/10.5194/bg-17-5989-2020, https://doi.org/10.5194/bg-17-5989-2020, 2020
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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, https://doi.org/10.5194/bg-17-5639-2020, https://doi.org/10.5194/bg-17-5639-2020, 2020
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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, https://doi.org/10.5194/bg-17-5513-2020, https://doi.org/10.5194/bg-17-5513-2020, 2020
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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, https://doi.org/10.5194/bg-17-5365-2020, https://doi.org/10.5194/bg-17-5365-2020, 2020
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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, https://doi.org/10.5194/bg-17-5149-2020, https://doi.org/10.5194/bg-17-5149-2020, 2020
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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, https://doi.org/10.5194/bg-17-4919-2020, https://doi.org/10.5194/bg-17-4919-2020, 2020
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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, https://doi.org/10.5194/bg-17-4883-2020, https://doi.org/10.5194/bg-17-4883-2020, 2020
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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, https://doi.org/10.5194/bg-17-4871-2020, https://doi.org/10.5194/bg-17-4871-2020, 2020
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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, https://doi.org/10.5194/bg-17-4785-2020, https://doi.org/10.5194/bg-17-4785-2020, 2020
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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, https://doi.org/10.5194/bg-17-4281-2020, https://doi.org/10.5194/bg-17-4281-2020, 2020
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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, https://doi.org/10.5194/bg-17-3903-2020, https://doi.org/10.5194/bg-17-3903-2020, 2020
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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, https://doi.org/10.5194/bg-17-3891-2020, https://doi.org/10.5194/bg-17-3891-2020, 2020
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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.
Cited articles
Araguás-Araguás, L., Froehlich, K., and Rozanski, K.:
Stable isotope composition of precipitation over southeast Asia,
J. Geophys. Res.-Atmos.,
103, 28721–28742, https://doi.org/10.1029/98JD02582, 1998.
Bam, E. and Ireson, A. M.:
Quantifying the wetland water balance: a new isotope-based approach that includes precipitation and infiltration,
J. Hydrol.,
570, 185–200, https://doi.org/10.1016/j.jhydrol.2018.12.032, 2018.
Chen, X. L., Chen, Y. N., and Chen, Y. N P.:
Water use relationship of desert riparian forest in lower reaches of Heihe River,
Chinese Journal of Eco-Agriculture,
22, 972–979, https://doi.org/10.1007/s11430-013-4680-8, 2014.
Christopher, T., Solomon, J, J., Cole, R. R., and Doucett, M.:
The influence of environmental water on the hydrogen stable isotope ratio in aquatic consumers,
Oecologia,
161, 313–324, https://doi.org/10.1007/s00442-009-1370-5, 2009.
Coenders-Gerrits, A. M, J., van der Ent, R. J., Bogaard, T. A., Wang-Erlandsson, L., Hrachowitz, M., Savenije, and Savenije, H. H. G.:
Uncertainties in transpiration estimates,
Nature,
506, 74–87, https://doi.org/10.1038/nature12925, 2014.
Coplen, T.:
Stable isotope hydrology: Stable isotope hydrology: deuterium and oxygen 18 in the water cycle,
EOS T. Am. Geophys. Un.,
63, 861–862, https://doi.org/10.1029/EO063i045p00861, 2013.
Cortes, A. and Farvolden, R. N.:
Isotope studied of precipitation and groundwater in the Sierra de las Cruces, Mexico,
J. Hydrol.,
107, 147–153, https://doi.org/10.1016/0022-1694(89)90055-3, 1989.
Craig, H.: Isotopic variations in meteoric water, Science, 133, 1702–1703, https://doi.org/10.1126/science133.3465.1702, 1961.
Csilla, F., Györgyi, G., Zsófia, B., and Eszter, T.:
Impact of expected climate change on soil water regime under different vegetation conditions,
Biologia, 69, 1510–1519, https://doi.org/10.2478/s11756-014-0463-8, 2014.
Dai, J. J., Zhang, X. P., Luo, Z. D., Wang, R., Liu, Z. L., He, X. G., and Guan, H. D.:
Variation of the stable isotopes of water in the soil–plant–atmosphere continuum of a Cinnamomum camphora woodland in the East Asian monsoon region,
J. Hydrol.,
589, 125199, https://doi.org/10.1016/j.jhydrol.2020.125199, 2020.
Darling, W. G., Bath, A. H., and Talbot, J. C.: The O and H stable isotope composition of freshwaters in the British Isles. 2. Surface waters and groundwater, Hydrol. Earth Syst. Sci., 7, 183–195, https://doi.org/10.5194/hess-7-183-2003, 2003.
Dawson, T. E.:
Water sources of plants as determined from xylem-water isotopic composition: perspectives on plant competition, distribution, and water relations stable isotopes and plant carbon water relations, stable isotopes and plant carbon-water relations, Stable Isotopes and Plant carbon-water relations. Academic Press, 465–496, 1993.
Dawson, T. E. and Ehleringer, J. R.:
Streamside trees that do not use stream water,
Nature,
350, 335–337, https://doi.org/10.1038/350335a0, 1991.
Detjen, M., Sterling, E., and Gómez, A.: Stable isotopes in barnacles as a tool to understand green sea turtle (Chelonia mydas) regional movement patterns, Biogeosciences, 12, 7081–7086, https://doi.org/10.5194/bg-12-7081-2015, 2015.
Durand, J.-L., Bariac, T., Ghesquière, M., Biron, P., Richard, P., Humphreys, M., and Zwierzykovski, Z.:
Ranking of the depth of water extraction by individual grass plants, using natural 18O isotope abundance,
Environ. Exp. Bot.,
60, 137–144, https://doi.org/10.1016/j.envexpbot.2006.09.004, 2007.
Ehleringer, L.:
Stable isotope composition of stem and leaf water: applications to the study of plant water use,
Funct. Ecol.,
5, 270–277, https://doi.org/10.2307/2389264, 1991.
Gao, J., Tian, L, D., Liu, Y, Q., and Gong, T. L.:
Oxygen isotope variation in the water cycle of the Yamzho lake Basin in southern Tibetan Plateau,
Chinese Sci. Bull.,
2758–2765, https://doi.org/10.1007/s11434-009-0487-6, 2009.
Gao, J., Yao, T., Tian, L. D., Risi, C., and Hoffmann, G.:
Precipitation water stable isotopes in the south Tibetan Plateau: observations and modeling,
J. Climate,
24, 3161–3178, https://doi.org/10.1175/2010JCLI3736.1, 2011.
Hou, S. B., Song, X. F., Jie, Y. J., Liu, X., and Zhang, G. Y.:
Stable isotopes characters in the process of precipitation and infiltration in taihang mountainous region,
Resources Science, 23, 86–92, http://hdl.handle.net/2268/90707, 2008.
Hua, M. Q., Zhang, X. P., Yao, T. C., Luo, Z. D., Zhou, H., Rao, Z. G., and He, X. G.:
Dual effects of precipitation and evaporation on lake water stable isotope composition in the monsoon region,
Hydrol. Process.,
33, 2192–2205, https://doi.org/10.1002/hyp.13462, 2019.
Jasechko, S., Sharp, Z. D., Gibson, J. J., Birkes, S. J., Yi, Y., and Fawcett, P. J.:
Terrestrial water fluxes dominated by transpiration,
Nature,
496, 347–351, https://doi.org/10.1038/nature11983, 2013.
Javaux, M., Rothfuss, Y., Vanderborght, J., Vereecken, H., and Brüggemann, N.:
Isotopic composition of plant water sources,
Nature,
536, E1–E3, https://doi.org/10.1038/nature18946, 2016.
Li, C. C., Huang, M. S., Liu, J., Ji, S. P., and Zhao, R. Q.:
Isotope-based water-use efficiency of major greening plants in a sponge city in northern China,
PloS one,
14, https://doi.org/10.1371/journal.pone.0220083, 2019.
Li, L. F., Yan, J. P., Liu, D. M., Chen, F., and Ding, J. M.:
Changes in soil water content under different vegetation conditions in arid-semi-arid areas and analysis of vegetation construction methods, Bulletin of Soil and Water Conservation, 29, 18–22, 2009.
Li, S. G., Maki, T., Atsuko, S., and Michiaki, S.:
Seasonal variation in oxygen isotope composition of waters for a montane larch forest in Mongolia,
Trees, 20, 122–130, https://doi.org/10.1007/s00468-005-0019-1, 2006.
Liu, W., Wang, P., Li, J., Liu, W., and Li, H.:
Plasticity of source-water acquisition in epiphytic, transitional and terrestrial growth phases of Ficus tinctoria,
Ecohydrology,
7, 1524–1533, https://doi.org/10.1002/eco.1475, 2015.
McCole, A. A. and Stern, L. A.:
Seasonal water use patterns of Juniperus ashei on the Edwards Plateau, Texas, based on stable isotopes in water,
J. Hydrol.,
342, 238–248, https://doi.org/10.1016/j.jhydrol.2007.05.024, 2007.
Meissner, K., Schwendenmann, H., and Dyckmans.:
Soil water uptake by trees using water stable isotopes (δD and δ18O) – a method test regarding soil moisture, texture and carbonate,
Plant Soil.,
376, 327–335, https://doi.org/10.1007/s11104-013-1970-z, 2014.
Meng, X. Q., Wen, X. F., Zhang, X. Y., Han, J. Y., Sun, X. M., and Li, X. B.:
Influence of organics on the determination of δ18O and δD of plant leaves and stalk water by infrared spectroscopy,
Chinese Journal of Eco-Agriculture,
20, 1359–1365, 2012.
Nie, Y. P., Chen, H. S., Wang, K, L., and Ding, Y. L.:
Rooting characteristics of two widely distributed woody plant species growing in different karst habitats of southwest China,
Plant. Ecol.,
215, 1099–1109, https://doi.org/10.1007/s11258-014-0369-0, 2014.
Nlend, B., Celle-Jeanton, H., Risi, C., Pohl, B., Huneau, F., Ngo
Boum-Nkot, S., Seze, G., Roucou, P., Camberlin, P., Etame, J.,
and Ketchemen-Tandia, B.:
Identification of processes that control the stable isotope composition of rainwater in the humid tropical west-central Africa,
J. Hydrol.,
584, 124650, https://doi.org/10.1016/j.jhydrol.2020.124650, 2020.
Price, R. M., Skrzypek, G., Grierson, P. F., Swart, P. K , and Fourqurean, J. W.:
The use of stable isotopes of oxygen and hydrogen to identify water sources in two hypersaline estuaries with different hydrologic regimes,
Mar. Freshwater Res.,
63, 952–966, https://doi.org/10.1071/MF12042, 2012.
Raco, B., Dotsika, E., Feroni, A. C., Battaglini, R., and Poutoukis, D.:
Stable isotope composition of italian bottled waters,
J. Geochem. Explor.,
124, 203–211, https://doi.org/10.1016/j.gexplo.2012.10.003, 2013.
Rodriguez-Iturbe, I., Porporato, A., Laio, F., and Ridolfi,
L.:
Plants in water-controlled ecosystems: active role in hydrologic processes and response to water stress,
Adv. Water. Resour.,
24, 707–723, https://doi.org/10.1016/S0309-1708(01)00005-7, 2001.
Rothfuss, Y. and Javaux, M.: Reviews and syntheses: Isotopic approaches to quantify root water uptake: a review and comparison of methods, Biogeosciences, 14, 2199–2224, https://doi.org/10.5194/bg-14-2199-2017, 2017.
Rozanski, K., Araguas-Araguas, L., and Gonfifiantini, R.:
Relation between long-term trends of oxygen-18 isotope composition of precipitation and climate,
Science,
258, 981–985, https://doi.org/10.1126/science.258.5084.981, 1992.
Schlesinger, W. H. and Jasechko, S.:
Transpiration in the global water cycle,
Agr. Forest Meteorol.,
189, 115–117, https://doi.org/10.1016/j.agrformet.2014.01.011, 2014.
Schwendenmann, L., Pendall, E., Sanchez-Bragado, R., Kunert, N., Hölscher, D.:
Tree water uptake in a tropical plantation varying in tree diversity: Interspecific differences, seasonal shifts and complementarity,
Ecohydrology,
8, 1–12, https://doi.org/10.1002/eco.1479, 2015.
Shou, W. K., Hu, F. L., Alamusa., and Liu, Z. M.:
Methods for studying water cycle and water sources in arid regions based on spac system,
Chinese Journal of Ecology,
32, 2194–2202, 2013.
Smith, G. I., Friedman, I., Gleason, J. D., and Warden, A.:
Stable isotope composition of waters in southeastern California: 2. groundwaters and their relation to modern precipitation,
J. Geophys. Res-Atmos.,
97, 5813–5823, https://doi.org/10.1029/92JD00183, 1992.
Song, X., Barbour, M. M., Farquhar, G. D., Vann, D. R., and Helliker, B. R.:
Transpiration rate relates to within and across species variations in effective path length in a leaf water model of oxygen isotope enrichment,
Plant Cell Environ.,
36, 1338–1351, https://doi.org/10.1111/pce.12063, 2013.
Song, X. F., Xia, J., Yu, J. J., and Liu, C. M.:
Application of environmental isotope techniques to study the hydrological cycle mechanism of typical watersheds in North China,
Advances in Geographical Sciences,
21, 527–537, 2002.
Sprenger, M., Tetzlaff, D., and Soulsby, C.: Soil water stable isotopes reveal evaporation dynamics at the soil–plant–atmosphere interface of the critical zone, Hydrol. Earth Syst. Sci., 21, 3839–3858, https://doi.org/10.5194/hess-21-3839-2017, 2017.
Sun, S. F., Huang, J. H., Lin, G. H. , Zhao, W., and Han, X. G.:
Application of stable isotope technique in the study of plant water use,
Acta Ecologica Sinica,
25, 2362–2371, https://doi.org/10.1360/982004-755, 2005 (in Chinese).
Wan, Q. Z., Zhu, G. F., Guo, H. W., Zhang, Y., Pan, H. X., and Yong, L. L.:
Influence of vegetation coverage and climate environment on soil organic carbon in the Qilian mountains,
Sci. Rep.-UK,
9, 17623. https://doi.org/10.1038/s41598-019-53837-4, 2019.
Wang, S. Y., Wang, Q. L., Wu, J, K., He, X. B., and Wang, L. H.:
Characteristics of stable isotopes in precipitation and moisture sources in the headwaters of the Yangtze River,
Environm. Sci.,
40, 2615–2623, https://doi.org/10.13227/j.hjkx.201811140, 2019.
Wei, W., Xie, B., Zhang, X., and Zhang, J.: Spatial heterogeneity of soil moisture and vegetation cover in Shiyang river basin, northwest China, IOP Conference Series: Earth and Environmental Science., 237, 052003, https://doi.org/10.1088/1755-1315/237/5/052003, 2019.
West, A. G., Patrickson, S. J., and Ehleringer, J. R.:
Water extraction times for plant and soil materials used in stable isotope analysis,
Rapid Commun. Mass Sp.,
20, 1317–1321. https://doi.org/10.1002/rcm.2456, 2010.
Western, A. W. and Grayson, R. B.:
The tarrawarra data set: soil moisture patterns, soil characteristics, and hydrological flux measurements,
Water. Resour. Res.,
34, 2765–2768. https://doi.org/10.1029/98WR01833, 1998.
White, J., Cook, E., Lawrence, J. R., and Broecker, W. S.:
The
Yang, B., Wen, X., and Sun, X.:
Seasonal variations in depth of water uptake for a subtropical coniferous plantation subjected to drought in an east Asian monsoon region,
Agr. Forest Meteorol.,
201, 218–228, https://doi.org/10.1016/j.agrformet.2014.11.020, 2015.
Yu, J. J., Song, X. F., Liu, X. C., Yang, C., Tang, C. Y., and Li, F. D.:
A study of groundwater cycle in yongding river basin by using δD, δ18O and hydrochemical data,
Journal of Natural Resources, 22, 415–423, 2007.
Zhou, H., Zhao, W. Z., Zheng, X. J., and Li, S. J.:
Root distribution of Nitraria sibirica with seasonally varying water sources in a desert habitat,
J. Plant Res.,
128, 613–622, 2015.
Zhou, J. J., Zhao, Y. R., Huang, P., and Liu. C. F.:
Impacts of ecological restoration projects on the ecosystem carbon storage of inland river basin in arid area, China,
Ecol. Indic.,
118, 106803, https://doi.org/10.1016/j.ecolind.2020.106803, 2020.
Zhu, G. F., Guo, H. W., Qin, D. H., Pan, H. X., and Ma, X. G.:
Contribution of recycled moisture to precipitation in the monsoon marginal zone: estimate based on stable isotope data,
J. Hydrol.,
569, 423–435, https://doi.org/10.1016/j.jhydrol.2018.12.014, 2018.
Zhu, G. F., Zhang, Z. X., Guo H. W., Zhang, Y., Yong, L. L., Wan, Q. Z., Sun, Z. G., and Ma, H. Y.:
Below-Cloud Evaporation of Precipitation Isotope over Mountain–oasis–desert in Arid Area,
J. Hydrometeorol.,
22, 2533-2545, https://doi.org/10.1175/JHM-D-20-0170.1, 2021a.
Zhu, G. F.: Stable water isotope monitoring network of different
water bodies in Shiyang River Basin, a typical arid river in China
(Supplemental Edition 20210808) [data set], https://doi.org/10.17632/d5kzm92nn3.1, 2021b.
Short 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 plays 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.
We took the water cycle process of soil–plant–atmospheric precipitation as the research...
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