Articles | Volume 14, issue 19
https://doi.org/10.5194/bg-14-4455-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-14-4455-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
11 Oct 2017
Research article |
| 11 Oct 2017
Effects of ultraviolet radiation on photosynthetic performance and N2 fixation in Trichodesmium erythraeum IMS 101
Xiaoni Cai
State Key Laboratory of Marine Environmental Science, Xiamen
University, Xiamen, Fujian, 361102, China
Department of Biological Sciences, University of Southern California,
3616 Trousdale Parkway, Los Angeles, California, 90089, USA
David A. Hutchins
Department of Biological Sciences, University of Southern California,
3616 Trousdale Parkway, Los Angeles, California, 90089, USA
Feixue Fu
Department of Biological Sciences, University of Southern California,
3616 Trousdale Parkway, Los Angeles, California, 90089, USA
State Key Laboratory of Marine Environmental Science, Xiamen
University, Xiamen, Fujian, 361102, China
Related authors
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David A. Hutchins, Fei-Xue Fu, Shun-Chung Yang, Seth G. John, Stephen J. Romaniello, M. Grace Andrews, and Nathan G. Walworth
Biogeosciences, 20, 4669–4682, https://doi.org/10.5194/bg-20-4669-2023, https://doi.org/10.5194/bg-20-4669-2023, 2023
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Applications of the mineral olivine are a promising means to capture carbon dioxide via coastal enhanced weathering, but little is known about the impacts on important marine phytoplankton. We examined the effects of olivine dissolution products on species from three major phytoplankton groups: diatoms, coccolithophores, and cyanobacteria. Growth and productivity were generally either unaffected or stimulated, suggesting the effects of olivine on key phytoplankton are negligible or positive.
Guang Gao, Tifeng Wang, Jiazhen Sun, Xin Zhao, Lifang Wang, Xianghui Guo, and Kunshan Gao
Biogeosciences, 19, 2795–2804, https://doi.org/10.5194/bg-19-2795-2022, https://doi.org/10.5194/bg-19-2795-2022, 2022
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After conducting large-scale deck-incubation experiments, we found that seawater acidification (SA) increased primary production (PP) in coastal waters but reduced it in pelagic zones, which is mainly regulated by local pH, light intensity, salinity, and community structure. In future oceans, SA combined with decreased upward transports of nutrients may synergistically reduce PP in pelagic zones.
Yong Zhang, Sinéad Collins, and Kunshan Gao
Biogeosciences, 17, 6357–6375, https://doi.org/10.5194/bg-17-6357-2020, https://doi.org/10.5194/bg-17-6357-2020, 2020
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Our results show that ocean acidification, warming, increased light exposure and reduced nutrient availability significantly reduce the growth rate but increase particulate organic and inorganic carbon in cells in the coccolithophore Emiliania huxleyi, indicating biogeochemical consequences of future ocean changes on the calcifying microalga. Concurrent changes in nutrient concentrations and pCO2 levels predominantly affected E. huxleyi growth, photosynthetic carbon fixation and calcification.
Noelle A. Held, Eric A. Webb, Matthew M. McIlvin, David A. Hutchins, Natalie R. Cohen, Dawn M. Moran, Korinna Kunde, Maeve C. Lohan, Claire Mahaffey, E. Malcolm S. Woodward, and Mak A. Saito
Biogeosciences, 17, 2537–2551, https://doi.org/10.5194/bg-17-2537-2020, https://doi.org/10.5194/bg-17-2537-2020, 2020
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Trichodesmium is a globally important marine nitrogen fixer that stimulates primary production in the surface ocean. We surveyed metaproteomes of Trichodesmium populations across the North Atlantic and other oceans, and we found that they experience simultaneous phosphate and iron stress because of the biophysical limits of nutrient uptake. Importantly, nitrogenase was most abundant during co-stress, indicating the potential importance of this phenotype to global nitrogen and carbon cycling.
Xiangqi Yi, Fei-Xue Fu, David A. Hutchins, and Kunshan Gao
Biogeosciences, 17, 1169–1180, https://doi.org/10.5194/bg-17-1169-2020, https://doi.org/10.5194/bg-17-1169-2020, 2020
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Combined effects of warming and light intensity were estimated in N2-fixing cyanobacterium Trichodesmium. Its physiological responses to warming were significantly modulated by light, with growth peaking at 27 °C under the light-saturating condition but being non-responsive across the range of 23–31 °C under the light-limiting condition. Light shortage also weakened the acclimation ability of Trichodesmium to warming, making light-limited Trichodesmium more sensitive to acute temperature change.
Xinwei Wang, Feixue Fu, Pingping Qu, Joshua D. Kling, Haibo Jiang, Yahui Gao, and David A. Hutchins
Biogeosciences, 16, 4393–4409, https://doi.org/10.5194/bg-16-4393-2019, https://doi.org/10.5194/bg-16-4393-2019, 2019
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In this study, we examine the responses of E. huxleyi to a future warmer and more thermally variable ocean. Elevated temperatures and thermal variation have negative effects on growth rate and physiology that are especially pronounced at high temperatures, but high-frequency thermal variation may reduce the risk of extreme high-temperature events. These findings have potentially large implications for ocean productivity and marine biogeochemical cycles under a future changing climate.
Jiekai Xu, John Beardall, and Kunshan Gao
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-4, https://doi.org/10.5194/bg-2019-4, 2019
Revised manuscript not accepted
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A lot of papers studying Ocean acidification (OA) have been published while no related reports can be found on the combined effects of OA with decreased salinity on coccolithophores yet.Thus, we investigated the physiological responses of an Emiliania huxleyi strain grown at 2CO2 concentrations and 3 levels of salinity and found cells could tolerate reduced salinity under OA as its increased light capturing capability, which suggests a potential niche extension of coccolithophores in the future.
Shanying Tong, David A. Hutchins, and Kunshan Gao
Biogeosciences, 16, 561–572, https://doi.org/10.5194/bg-16-561-2019, https://doi.org/10.5194/bg-16-561-2019, 2019
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Most previous studies concerning the effects of environmental changes on marine organisms have been carried out under
photosynthetically active radiation onlyconditions, with solar ultraviolet radiation (UVR) not being considered. In this study, we found that UVR can counteract the negative effects of the
greenhousetreatment on the calcification rate to photosynthesis rate ratio, and may be a key stressor when considering the impacts of future greenhouse conditions on E. huxleyi.
Sheng-Hui Zhang, Juan Yu, Qiong-Yao Ding, Gui-Peng Yang, Kun-Shan Gao, Hong-Hai Zhang, and Da-Wei Pan
Biogeosciences, 15, 6649–6658, https://doi.org/10.5194/bg-15-6649-2018, https://doi.org/10.5194/bg-15-6649-2018, 2018
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Environmental effects of ocean acidification and trace gases have drawn much attention in recent years and existing studies reveal that the response of communities and trace gases to ocean acidification is still not predictable and requires further study. The present study examined the effect of elevated pCO2 on trace gas production and phytoplankton during an ocean acidification mesocosm experiment.
Chris J. Daniels, Alex J. Poulton, William M. Balch, Emilio Marañón, Tim Adey, Bruce C. Bowler, Pedro Cermeño, Anastasia Charalampopoulou, David W. Crawford, Dave Drapeau, Yuanyuan Feng, Ana Fernández, Emilio Fernández, Glaucia M. Fragoso, Natalia González, Lisa M. Graziano, Rachel Heslop, Patrick M. Holligan, Jason Hopkins, María Huete-Ortega, David A. Hutchins, Phoebe J. Lam, Michael S. Lipsen, Daffne C. López-Sandoval, Socratis Loucaides, Adrian Marchetti, Kyle M. J. Mayers, Andrew P. Rees, Cristina Sobrino, Eithne Tynan, and Toby Tyrrell
Earth Syst. Sci. Data, 10, 1859–1876, https://doi.org/10.5194/essd-10-1859-2018, https://doi.org/10.5194/essd-10-1859-2018, 2018
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Calcifying marine algae (coccolithophores) are key to oceanic biogeochemical processes, such as calcium carbonate production and export. We compile a global database of calcium carbonate production from field samples (n = 2756), alongside primary production rates and coccolithophore abundance. Basic statistical analysis highlights global distribution, average surface and integrated rates, patterns with depth and the importance of considering cell-normalised rates as a simple physiological index.
Xin Lin, Ruiping Huang, Yan Li, Futian Li, Yaping Wu, David A. Hutchins, Minhan Dai, and Kunshan Gao
Biogeosciences, 15, 551–565, https://doi.org/10.5194/bg-15-551-2018, https://doi.org/10.5194/bg-15-551-2018, 2018
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We examine the effects of elevated CO2 on bacterioplankton community during a mesocosm experiment in subtropical, eutrophic coastal waters in southern China. We found that the elevated CO2 hardly altered the network structure of the bacterioplankton taxa present with high abundance but appeared to reassemble the community network of taxa with low abundance. Results suggest that the bacterioplankton community in this subtropical, high-nutrient coastal environment is insensitive to elevated CO2.
Yong Zhang, Feixue Fu, David A. Hutchins, and Kunshan Gao
Biogeosciences Discuss., https://doi.org/10.5194/bg-2018-11, https://doi.org/10.5194/bg-2018-11, 2018
Revised manuscript not accepted
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To investigate responses of the calcifying E. huxleyi to multiple environmental factors, we investigated its growth, POC and PIC quotas and photosynthesis parameter at different levels of CO2, light, dissolved inorganic nitrogen and phosphate concentrations. High CO2 (HC) and low nitrogen (LN) synergistically decreased growth rates, high light compensated for inhibition of low phosphate (LP) on growth rates at LC, but exacerbated inhibition of LP at HC. LN or LP increased PIC quotas and ETRmax.
Zhi Zhu, Pingping Qu, Jasmine Gale, Feixue Fu, and David A. Hutchins
Biogeosciences, 14, 5281–5295, https://doi.org/10.5194/bg-14-5281-2017, https://doi.org/10.5194/bg-14-5281-2017, 2017
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This study focused on the individual and interactive effects of warming and CO2 variations on the diatom Pseudo-nitzschia subcurvata and the prymnesiophyte Phaeocystis antarctica. The results showed that both optimum and maximum growth temperatures of P. subcurvata were significantly higher than those of P. antarctica. CO2 functional response curves at two temperatures showed a significant interactive effect between warming and CO2. This study can help us to predict what will happen in future.
Futian Li, Yaping Wu, David A. Hutchins, Feixue Fu, and Kunshan Gao
Biogeosciences, 13, 6247–6259, https://doi.org/10.5194/bg-13-6247-2016, https://doi.org/10.5194/bg-13-6247-2016, 2016
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Ongoing ocean acidification is being superimposed on the natural carbonate buffer system to influence the physiology of phytoplankton. Here, we show that coastal and oceanic diatoms respond differentially to diurnal fluctuating carbonate chemistry in current and ocean acidification scenarios. We propose that the ability to acclimate to dynamic carbonate chemistry may act as one determinant of the spatial distribution of diatom species.
Guang Gao, Peng Jin, Nana Liu, Futian Li, Shanying Tong, David A. Hutchins, and Kunshan Gao
Biogeosciences Discuss., https://doi.org/10.5194/bg-2016-403, https://doi.org/10.5194/bg-2016-403, 2016
Manuscript not accepted for further review
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Our shipboard experiments showed high temperature and CO2 (HTHC) did not affect phytoplankton biomass at nearshore station but decreased it at offshore station. HT did not change dark respiration at nearshore station but enhanced it at offshore station. Our findings indicate that responses of coastal and offshore phytoplankton assemblages to ocean warming and acidification may be contrasting, with the pelagic phytoplankton communities being more sensitive to these two global change factors.
Juntian Xu, Lennart T. Bach, Kai G. Schulz, Wenyan Zhao, Kunshan Gao, and Ulf Riebesell
Biogeosciences, 13, 4637–4643, https://doi.org/10.5194/bg-13-4637-2016, https://doi.org/10.5194/bg-13-4637-2016, 2016
Khan M. G. Mostofa, Cong-Qiang Liu, WeiDong Zhai, Marco Minella, Davide Vione, Kunshan Gao, Daisuke Minakata, Takemitsu Arakaki, Takahito Yoshioka, Kazuhide Hayakawa, Eiichi Konohira, Eiichiro Tanoue, Anirban Akhand, Abhra Chanda, Baoli Wang, and Hiroshi Sakugawa
Biogeosciences, 13, 1767–1786, https://doi.org/10.5194/bg-13-1767-2016, https://doi.org/10.5194/bg-13-1767-2016, 2016
Y. Li, S. Zhuang, Y. Wu, H. Ren, F. Cheng, X. Lin, K. Wang, J. Beardall, and K. Gao
Biogeosciences Discuss., https://doi.org/10.5194/bgd-12-15809-2015, https://doi.org/10.5194/bgd-12-15809-2015, 2015
Revised manuscript not accepted
W. Li, K. Gao, and J. Beardall
Biogeosciences, 12, 2383–2393, https://doi.org/10.5194/bg-12-2383-2015, https://doi.org/10.5194/bg-12-2383-2015, 2015
S. Chen, J. Beardall, and K. Gao
Biogeosciences, 11, 4829–4837, https://doi.org/10.5194/bg-11-4829-2014, https://doi.org/10.5194/bg-11-4829-2014, 2014
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Biogeosciences, 21, 3965–3984, https://doi.org/10.5194/bg-21-3965-2024, https://doi.org/10.5194/bg-21-3965-2024, 2024
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Lucia Fuchslueger, Emily Francesca Solly, Alberto Canarini, and Albert Carles Brangarí
Biogeosciences, 21, 3959–3964, https://doi.org/10.5194/bg-21-3959-2024, https://doi.org/10.5194/bg-21-3959-2024, 2024
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Biogeosciences, 21, 2529–2546, https://doi.org/10.5194/bg-21-2529-2024, https://doi.org/10.5194/bg-21-2529-2024, 2024
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EGUsphere, https://doi.org/10.5194/egusphere-2024-1285, https://doi.org/10.5194/egusphere-2024-1285, 2024
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Geochemical cycles and biodiversity are altered at transition zones of chemosynthetic ecosystems, chemotones. We asked if burrowing alters the functionality of these habitats. We surveyed the seafloor, analyzed sediment properties, and explored microbial communities in ghost shrimp burrows. We made an exciting discovery of chemosynthetic biofilms, linking them to macromolecule turnover and nutrient cycling, using metagenomics. This phenomenon may play an important role in biogeochemical cycles.
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EGUsphere, https://doi.org/10.5194/egusphere-2024-1085, https://doi.org/10.5194/egusphere-2024-1085, 2024
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Biogeosciences, 21, 1601–1611, https://doi.org/10.5194/bg-21-1601-2024, https://doi.org/10.5194/bg-21-1601-2024, 2024
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Coccolithophores contribute to the global carbon cycle and their calcite structures (coccoliths) are used as a palaeoproxy to understand past oceanographic conditions. Here, we compared three frequently used methods to estimate coccolith mass from the model species Emiliania huxleyi and the results allow for a high level of comparability between the methods, facilitating future comparisons and consolidation of mass changes observed from ecophysiological and biogeochemical studies.
Ralf Conrad and Peter Claus
Biogeosciences, 21, 1161–1172, https://doi.org/10.5194/bg-21-1161-2024, https://doi.org/10.5194/bg-21-1161-2024, 2024
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Knowledge of carbon isotope fractionation is important for the assessment of the pathways involved in the degradation of organic matter. Formate is an important intermediate during this process. It was mainly converted to carbon dioxide and acetate both in the presence and absence of sulfate. Methane was only a minor product and was mainly formed from the acetate. The acetate was depleted in the heavy carbon atom relative to formate, while the carbon dioxide was enriched.
Mutong Niu, Shu Huang, Wei Hu, Yajie Wang, Wanyun Xu, Wan Wei, Qiang Zhang, Zihan Wang, Donghuan Zhang, Rui Jin, Libin Wu, Junjun Deng, Fangxia Shen, and Pingqing Fu
Biogeosciences, 20, 4915–4930, https://doi.org/10.5194/bg-20-4915-2023, https://doi.org/10.5194/bg-20-4915-2023, 2023
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Sugar compounds in air can trace the source of bioaerosols that affect public health and climate. In rural north China, we observed increased fungal activity at night and less variable bacterial community diversity. Certain night-increasing sugar compounds were more closely related to fungi than bacteria. The fungal community greatly influenced sugar compounds, while bacteria played a limited role. Caution is advised when using sugar compounds to trace airborne microbes, particularly bacteria.
David A. Hutchins, Fei-Xue Fu, Shun-Chung Yang, Seth G. John, Stephen J. Romaniello, M. Grace Andrews, and Nathan G. Walworth
Biogeosciences, 20, 4669–4682, https://doi.org/10.5194/bg-20-4669-2023, https://doi.org/10.5194/bg-20-4669-2023, 2023
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Applications of the mineral olivine are a promising means to capture carbon dioxide via coastal enhanced weathering, but little is known about the impacts on important marine phytoplankton. We examined the effects of olivine dissolution products on species from three major phytoplankton groups: diatoms, coccolithophores, and cyanobacteria. Growth and productivity were generally either unaffected or stimulated, suggesting the effects of olivine on key phytoplankton are negligible or positive.
Ze Ren, Shudan Ye, Hongxuan Li, Xilei Huang, and Luyao Chen
Biogeosciences, 20, 4241–4258, https://doi.org/10.5194/bg-20-4241-2023, https://doi.org/10.5194/bg-20-4241-2023, 2023
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Permafrost thaw initiates thermokarst landscape formation, resulting in distinct new habitats, including degraded permafrost soil, thermokarst lake sediments, and lake water. These distinct habitats harbored differentiated bacterial communities that originated from the same source, differing in diversity, assembly mechanisms, and environmental influences. The results imply ecological consequences of permafrost degradation in the face of further climate change.
Caitlyn A. Hall, Andre van Turnhout, Edward Kavazanjian Jr., Leon A. van Paassen, and Bruce Rittmann
Biogeosciences, 20, 2903–2917, https://doi.org/10.5194/bg-20-2903-2023, https://doi.org/10.5194/bg-20-2903-2023, 2023
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Earthquake-induced soil liquefaction poses a significant global threat. Microbially induced desaturation and precipitation (MIDP) via denitrification is a potentially sustainable, non-disruptive bacteria-driven ground improvement technique under existing structures. We developed a next-generation biogeochemical model to understand and predict the behavior of MIDP in the natural environment to design field-based hazard mitigation treatments.
Juan Pablo Almeida, Lorenzo Menichetti, Alf Ekblad, Nicholas P. Rosenstock, and Håkan Wallander
Biogeosciences, 20, 1443–1458, https://doi.org/10.5194/bg-20-1443-2023, https://doi.org/10.5194/bg-20-1443-2023, 2023
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In forests, trees allocate a significant amount of carbon belowground to support mycorrhizal symbiosis. In northern forests nitrogen normally regulates this allocation and consequently mycorrhizal fungi growth. In this study we demonstrate that in a conifer forest from Sweden, fungal growth is regulated by phosphorus instead of nitrogen. This is probably due to an increase in nitrogen deposition to soils caused by decades of human pollution that has altered the ecosystem nutrient regime.
Yong Zhang, Yong Zhang, Shuai Ma, Hanbing Chen, Jiabing Li, Zhengke Li, Kui Xu, Ruiping Huang, Hong Zhang, Yonghe Han, and Jun Sun
Biogeosciences, 20, 1299–1312, https://doi.org/10.5194/bg-20-1299-2023, https://doi.org/10.5194/bg-20-1299-2023, 2023
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We found that increasing light intensity compensates for the negative effects of low phosphorus (P) availability on cellular protein and nitrogen contents. Reduced P availability, increasing light intensity, and ocean acidification act synergistically to increase cellular contents of carbohydrate and POC and the allocation of POC to carbohydrate. These regulation mechanisms in Emiliania huxleyi could provide vital information for evaluating carbon cycle in marine ecosystems under global change.
Beatriz Gill-Olivas, Jon Telling, Mark Skidmore, and Martyn Tranter
Biogeosciences, 20, 929–943, https://doi.org/10.5194/bg-20-929-2023, https://doi.org/10.5194/bg-20-929-2023, 2023
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Microbial ecosystems have been found in all subglacial environments sampled to date. Yet, little is known of the sources of energy and nutrients that sustain these microbial populations. This study shows that crushing of sedimentary rocks, which contain organic carbon, carbonate and sulfide minerals, along with previously weathered silicate minerals, produces a range of compounds and nutrients which can be utilised by the diverse suite of microbes that inhabit glacier beds.
Federico Fabisik, Benoit Guieysse, Jonathan Procter, and Maxence Plouviez
Biogeosciences, 20, 687–693, https://doi.org/10.5194/bg-20-687-2023, https://doi.org/10.5194/bg-20-687-2023, 2023
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We show, for the first time, that pure cultures of the cyanobacterium Microcystis aeruginosa can synthesize the potent greenhouse gas N2O using nitrite as substrate. Our findings have broad environmental implications because M. aeruginosa is globally found in freshwater ecosystems and is often the dominant species found in algae blooms. Further research is now needed to determine the occurrence and significance of N2O emissions from ecosystems rich with M. aeruginosa.
Fanny Noirmain, Jean-Luc Baray, Frédéric Tridon, Philippe Cacault, Hermine Billard, Guillaume Voyard, Joël Van Baelen, and Delphine Latour
Biogeosciences, 19, 5729–5749, https://doi.org/10.5194/bg-19-5729-2022, https://doi.org/10.5194/bg-19-5729-2022, 2022
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We present a study linking rain, meteorology, and mountain lake phytoplankton dynamics on the basis of a case study at Aydat (France) in September 2020. The air mass origin mainly influences the rain chemical composition, which depends on the type of rain, convective or stratiform. Our results also highlighted a non-negligible presence of photosynthetic cells in rainwater. The impact of the atmospheric forcing on the lake could play a key role in phytoplankton dynamics in the temperate zone.
Sarah A. Brown, John Paul Balmonte, Adrienne Hoarfrost, Sherif Ghobrial, and Carol Arnosti
Biogeosciences, 19, 5617–5631, https://doi.org/10.5194/bg-19-5617-2022, https://doi.org/10.5194/bg-19-5617-2022, 2022
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Bacteria use extracellular enzymes to cut large organic matter to sizes small enough for uptake. We compared the enzymatic response of surface, mid-water, and deep-ocean bacteria to complex natural substrates. Bacteria in surface and mid-depth waters produced a much wider range of enzymes than those in the deep ocean and may therefore consume a broader range of organic matter. The extent to which organic matter is recycled by bacteria depends in part on its residence time at different depths.
Aaron Ferderer, Zanna Chase, Fraser Kennedy, Kai G. Schulz, and Lennart T. Bach
Biogeosciences, 19, 5375–5399, https://doi.org/10.5194/bg-19-5375-2022, https://doi.org/10.5194/bg-19-5375-2022, 2022
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Ocean alkalinity enhancement has the capacity to remove vast quantities of carbon from the atmosphere, but its effect on marine ecosystems is largely unknown. We assessed the effect of increased alkalinity on a coastal phytoplankton community when seawater was equilibrated and not equilibrated with atmospheric CO2. We found that the phytoplankton community was moderately affected by increased alkalinity and equilibration with atmospheric CO2 had little influence on this effect.
Quentin Devresse, Kevin W. Becker, Arne Bendinger, Johannes Hahn, and Anja Engel
Biogeosciences, 19, 5199–5219, https://doi.org/10.5194/bg-19-5199-2022, https://doi.org/10.5194/bg-19-5199-2022, 2022
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Eddies are ubiquitous in the ocean and alter physical, chemical, and biological processes. However, how they affect organic carbon production and consumption is largely unknown. Here we show how an eddy triggers a cascade effect on biomass production and metabolic activities of phyto- and bacterioplankton. Our results may contribute to the improvement of biogeochemical models used to estimate carbon fluxes in the ocean.
Sania Arif, Heiko Nacke, Elias Schliekmann, Andreas Reimer, Gernot Arp, and Michael Hoppert
Biogeosciences, 19, 4883–4902, https://doi.org/10.5194/bg-19-4883-2022, https://doi.org/10.5194/bg-19-4883-2022, 2022
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The natural enrichment of Chloroflexi (Ktedonobacteria) at the Kilianstollen Marsberg copper mine rocks being exposed to the acidic sulfate-rich leachate led to an investigation of eight metagenomically assembled genomes (MAGs) involved in copper and other transition heavy metal resistance in addition to low pH resistance and aromatic compounds degradation. The present study offers functional insights about a novel cold-adapted Ktedonobacteria MAG extremophily along with other phyla MAGs.
Chunmei Zhang, Huirong Li, Yinxin Zeng, Haitao Ding, Bin Wang, Yangjie Li, Zhongqiang Ji, Yonghong Bi, and Wei Luo
Biogeosciences, 19, 4639–4654, https://doi.org/10.5194/bg-19-4639-2022, https://doi.org/10.5194/bg-19-4639-2022, 2022
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The unique microbial eukaryotic community structure and lower diversity have been demonstrated in five freshwater lakes of the Fildes Peninsula, Antarctica. Stochastic processes and biotic co-occurrence patterns were shown to be important in shaping microbial eukaryotic communities in the area. Our study provides a better understanding of the dynamic patterns and ecological assembly processes of microbial eukaryotic communities in Antarctic oligotrophic lakes (Fildes Peninsula).
Juan Pablo Almeida, Nicholas P. Rosenstock, Susanne K. Woche, Georg Guggenberger, and Håkan Wallander
Biogeosciences, 19, 3713–3726, https://doi.org/10.5194/bg-19-3713-2022, https://doi.org/10.5194/bg-19-3713-2022, 2022
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Fungi living in symbiosis with tree roots can accumulate belowground, forming special tissues than can repel water. We measured the water repellency of organic material incubated belowground and correlated it with fungal growth. We found a positive association between water repellency and root symbiotic fungi. These results are important because an increase in soil water repellency can reduce the release of CO2 from soils into the atmosphere and mitigate the effects of greenhouse gasses.
Karen M. Brandenburg, Björn Rost, Dedmer B. Van de Waal, Mirja Hoins, and Appy Sluijs
Biogeosciences, 19, 3305–3315, https://doi.org/10.5194/bg-19-3305-2022, https://doi.org/10.5194/bg-19-3305-2022, 2022
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Reconstructions of past CO2 concentrations rely on proxy estimates, with one line of proxies relying on the CO2-dependence of stable carbon isotope fractionation in marine phytoplankton. Culturing experiments provide insights into which processes may impact this. We found, however, that the methods with which these culturing experiments are performed also influence 13C fractionation. Caution should therefore be taken when extrapolating results from these experiments to proxy applications.
Weilin Huang, Peter M. van Bodegom, Toni Viskari, Jari Liski, and Nadejda A. Soudzilovskaia
Biogeosciences, 19, 1469–1490, https://doi.org/10.5194/bg-19-1469-2022, https://doi.org/10.5194/bg-19-1469-2022, 2022
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This work focuses on one of the essential pathways of mycorrhizal impact on C cycles: the mediation of plant litter decomposition. We present a model based on litter chemical quality which precludes a conclusive examination of mycorrhizal impacts on soil C. It improves long-term decomposition predictions and advances our understanding of litter decomposition dynamics. It creates a benchmark in quantitatively examining the impacts of plant–microbe interactions on soil C dynamics.
Julie Dinasquet, Estelle Bigeard, Frédéric Gazeau, Farooq Azam, Cécile Guieu, Emilio Marañón, Céline Ridame, France Van Wambeke, Ingrid Obernosterer, and Anne-Claire Baudoux
Biogeosciences, 19, 1303–1319, https://doi.org/10.5194/bg-19-1303-2022, https://doi.org/10.5194/bg-19-1303-2022, 2022
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Saharan dust deposition of nutrients and trace metals is crucial to microbes in the Mediterranean Sea. Here, we tested the response of microbial and viral communities to simulated dust deposition under present and future conditions of temperature and pH. Overall, the effect of the deposition was dependent on the initial microbial assemblage, and future conditions will intensify microbial responses. We observed effects on trophic interactions, cascading all the way down to viral processes.
Ralf Conrad, Pengfei Liu, and Peter Claus
Biogeosciences, 18, 6533–6546, https://doi.org/10.5194/bg-18-6533-2021, https://doi.org/10.5194/bg-18-6533-2021, 2021
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Acetate is an important intermediate during the anaerobic degradation of organic matter. It is consumed by methanogenic and sulfidogenic microorganisms accompanied by stable carbon isotope fractionation. We determined isotope fractionation under different conditions in two paddy soils and two lake sediments and also determined the composition of the microbial communities. Despite a relatively wide range of experimental conditions, the range of fractionation factors was quite moderate.
Natalie R. Cohen, Abigail E. Noble, Dawn M. Moran, Matthew R. McIlvin, Tyler J. Goepfert, Nicholas J. Hawco, Christopher R. German, Tristan J. Horner, Carl H. Lamborg, John P. McCrow, Andrew E. Allen, and Mak A. Saito
Biogeosciences, 18, 5397–5422, https://doi.org/10.5194/bg-18-5397-2021, https://doi.org/10.5194/bg-18-5397-2021, 2021
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A previous study documented an intense hydrothermal plume in the South Pacific Ocean; however, the iron release associated with this plume and the impact on microbiology were unclear. We describe metal concentrations associated with multiple hydrothermal plumes in this region and protein signatures of plume-influenced microbes. Our findings demonstrate that resources released from these systems can be transported away from their source and may alter the physiology of surrounding microbes.
Sabyasachi Bhattacharya, Tarunendu Mapder, Svetlana Fernandes, Chayan Roy, Jagannath Sarkar, Moidu Jameela Rameez, Subhrangshu Mandal, Abhijit Sar, Amit Kumar Chakraborty, Nibendu Mondal, Sumit Chatterjee, Bomba Dam, Aditya Peketi, Ranadhir Chakraborty, Aninda Mazumdar, and Wriddhiman Ghosh
Biogeosciences, 18, 5203–5222, https://doi.org/10.5194/bg-18-5203-2021, https://doi.org/10.5194/bg-18-5203-2021, 2021
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Physicochemical determinants of microbiome architecture across continental shelves–slopes are unknown, so we explored the geomicrobiology along 3 m sediment horizons of seasonal (shallow coastal) and perennial (deep sea) hypoxic zones of the Arabian Sea. Nature, concentration, and fate of the organic matter delivered to the sea floor were found to shape the microbiome across the western Indian margin, under direct–indirect influence of sedimentation rate and water column O2 level.
Aditi Sengupta, Sarah J. Fansler, Rosalie K. Chu, Robert E. Danczak, Vanessa A. Garayburu-Caruso, Lupita Renteria, Hyun-Seob Song, Jason Toyoda, Jacqueline Hager, and James C. Stegen
Biogeosciences, 18, 4773–4789, https://doi.org/10.5194/bg-18-4773-2021, https://doi.org/10.5194/bg-18-4773-2021, 2021
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Conceptual models link microbes with the environment but are untested. We test a recent model using riverbed sediments. We exposed sediments to disturbances, going dry and becoming wet again. As the length of dry conditions got longer, there was a sudden shift in the ecology of microbes, chemistry of organic matter, and rates of microbial metabolism. We propose a new model based on feedbacks initiated by disturbance that cascade across biological, chemical, and functional aspects of the system.
Cora Hörstmann, Eric J. Raes, Pier Luigi Buttigieg, Claire Lo Monaco, Uwe John, and Anya M. Waite
Biogeosciences, 18, 3733–3749, https://doi.org/10.5194/bg-18-3733-2021, https://doi.org/10.5194/bg-18-3733-2021, 2021
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Microbes are the main drivers of productivity and nutrient cycling in the ocean. We present a combined approach assessing C and N uptake and microbial community diversity across ecological provinces in the Southern Ocean and southern Indian Ocean. Provinces showed distinct genetic fingerprints, but microbial activity varied gradually across regions, correlating with nutrient concentrations. Our study advances the biogeographic understanding of microbial diversity across C and N uptake regimes.
Nimrod Wieler, Tali Erickson Gini, Osnat Gillor, and Roey Angel
Biogeosciences, 18, 3331–3342, https://doi.org/10.5194/bg-18-3331-2021, https://doi.org/10.5194/bg-18-3331-2021, 2021
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Biological rock crusts (BRCs) are common microbial-based assemblages covering rocks in drylands. BRCs play a crucial role in arid environments because of the limited activity of plants and soil. Nevertheless, BRC development rates have never been dated. Here we integrated archaeological, microbiological and geological methods to provide a first estimation of the growth rate of BRCs under natural conditions. This can serve as an affordable dating tool in archaeological sites in arid regions.
Michal Elul, Maxim Rubin-Blum, Zeev Ronen, Itay Bar-Or, Werner Eckert, and Orit Sivan
Biogeosciences, 18, 2091–2106, https://doi.org/10.5194/bg-18-2091-2021, https://doi.org/10.5194/bg-18-2091-2021, 2021
Mindaugas Zilius, Irma Vybernaite-Lubiene, Diana Vaiciute, Donata Overlingė, Evelina Grinienė, Anastasija Zaiko, Stefano Bonaglia, Iris Liskow, Maren Voss, Agneta Andersson, Sonia Brugel, Tobia Politi, and Paul A. Bukaveckas
Biogeosciences, 18, 1857–1871, https://doi.org/10.5194/bg-18-1857-2021, https://doi.org/10.5194/bg-18-1857-2021, 2021
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In fresh and brackish waters, algal blooms are often dominated by cyanobacteria, which have the ability to utilize atmospheric nitrogen. Cyanobacteria are also unusual in that they float to the surface and are dispersed by wind-driven currents. Their patchy and dynamic distribution makes it difficult to track their abundance and quantify their effects on nutrient cycling. We used remote sensing to map the distribution of cyanobacteria in a large Baltic lagoon and quantify their contributions.
Saly Jaber, Muriel Joly, Maxence Brissy, Martin Leremboure, Amina Khaled, Barbara Ervens, and Anne-Marie Delort
Biogeosciences, 18, 1067–1080, https://doi.org/10.5194/bg-18-1067-2021, https://doi.org/10.5194/bg-18-1067-2021, 2021
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Our study is of interest to atmospheric scientists and environmental microbiologists, as we show that clouds can be considered a medium where bacteria efficiently degrade and transform amino acids, in competition with chemical processes. As current atmospheric multiphase models are restricted to chemical degradation of organic compounds, our conclusions motivate further model development.
Kahina Djaoudi, France Van Wambeke, Aude Barani, Nagib Bhairy, Servanne Chevaillier, Karine Desboeufs, Sandra Nunige, Mohamed Labiadh, Thierry Henry des Tureaux, Dominique Lefèvre, Amel Nouara, Christos Panagiotopoulos, Marc Tedetti, and Elvira Pulido-Villena
Biogeosciences, 17, 6271–6285, https://doi.org/10.5194/bg-17-6271-2020, https://doi.org/10.5194/bg-17-6271-2020, 2020
Romie Tignat-Perrier, Aurélien Dommergue, Alban Thollot, Olivier Magand, Timothy M. Vogel, and Catherine Larose
Biogeosciences, 17, 6081–6095, https://doi.org/10.5194/bg-17-6081-2020, https://doi.org/10.5194/bg-17-6081-2020, 2020
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The adverse atmospheric environmental conditions do not appear suited for microbial life. We conducted the first global comparative metagenomic analysis to find out if airborne microbial communities might be selected by their ability to resist these adverse conditions. The relatively higher concentration of fungi led to the observation of higher proportions of stress-related functions in air. Fungi might likely resist and survive atmospheric physical stress better than bacteria.
Yanhong Lu, Shunyan Cheung, Ling Chen, Shuh-Ji Kao, Xiaomin Xia, Jianping Gan, Minhan Dai, and Hongbin Liu
Biogeosciences, 17, 6017–6032, https://doi.org/10.5194/bg-17-6017-2020, https://doi.org/10.5194/bg-17-6017-2020, 2020
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Through a comprehensive investigation, we observed differential niche partitioning among diverse ammonia-oxidizing archaea (AOA) sublineages in a typical subtropical estuary. Distinct AOA communities observed at DNA and RNA levels suggested that a strong divergence in ammonia-oxidizing activity among different AOA groups occurs. Our result highlights the importance of identifying major ammonia oxidizers at RNA level in future studies.
Anna-Neva Visser, Scott D. Wankel, Pascal A. Niklaus, James M. Byrne, Andreas A. Kappler, and Moritz F. Lehmann
Biogeosciences, 17, 4355–4374, https://doi.org/10.5194/bg-17-4355-2020, https://doi.org/10.5194/bg-17-4355-2020, 2020
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This study focuses on the chemical reaction between Fe(II) and nitrite, which has been reported to produce high levels of the greenhouse gas N2O. We investigated the extent to which dead biomass and Fe(II) minerals might enhance this reaction. Here, nitrite reduction was highest when both additives were present but less pronounced if only Fe(II) minerals were added. Both reaction systems show distinct differences, rather low N2O levels, and indicated the abiotic production of N2.
Lisa Tanet, Séverine Martini, Laurie Casalot, and Christian Tamburini
Biogeosciences, 17, 3757–3778, https://doi.org/10.5194/bg-17-3757-2020, https://doi.org/10.5194/bg-17-3757-2020, 2020
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Bioluminescent bacteria, the most abundant light-emitting organisms in the ocean, can be free-living, be symbiotic or colonize organic particles. This review suggests that they act as a visual target and may indirectly influence the sequestration of biogenic carbon in oceans by increasing the attraction rate for consumers. We summarize the instrumentation available to quantify this impact in future studies and propose synthetic figures integrating these ecological and biogeochemical concepts.
Michael Lintner, Bianca Biedrawa, Julia Wukovits, Wolfgang Wanek, and Petra Heinz
Biogeosciences, 17, 3723–3732, https://doi.org/10.5194/bg-17-3723-2020, https://doi.org/10.5194/bg-17-3723-2020, 2020
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Foraminifera are unicellular marine organisms that play an important role in the marine element cycle. Changes of environmental parameters such as salinity or temperature have a significant impact on the faunal assemblages. Our experiments show that changing salinity in the German Wadden Sea immediately influences the foraminiferal community. It seems that A. tepida is better adapted to salinity fluctuations than H. germanica.
Kathrin Busch, Ulrike Hanz, Furu Mienis, Benjamin Mueller, Andre Franke, Emyr Martyn Roberts, Hans Tore Rapp, and Ute Hentschel
Biogeosciences, 17, 3471–3486, https://doi.org/10.5194/bg-17-3471-2020, https://doi.org/10.5194/bg-17-3471-2020, 2020
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Seamounts are globally abundant submarine structures that offer great potential to study the impacts and interactions of environmental gradients at a single geographic location. In an exemplary way, we describe potential mechanisms by which a seamount can affect the structure of pelagic and benthic (sponge-)associated microbial communities. We conclude that the geology, physical oceanography, biogeochemistry, and microbiology of seamounts are even more closely linked than currently appreciated.
Alexander Bratek, Justus E. E. van
Beusekom, Andreas Neumann, Tina Sanders, Jana Friedrich, Kay-Christian Emeis, and Kirstin Dähnke
Biogeosciences, 17, 2839–2851, https://doi.org/10.5194/bg-17-2839-2020, https://doi.org/10.5194/bg-17-2839-2020, 2020
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The following paper highlights the importance of benthic N-transformation rates in different sediment types in the southern North Sea as a source of fixed nitrogen for primary producers and also as a sink of fixed nitrogen. Sedimentary fluxes of dissolved inorganic nitrogen support ∼7 to 59 % of the average annual primary production. Semi-permeable and permeable sediments contribute ∼68 % of the total benthic N2 production rates, counteracting eutrophication in the southern North Sea.
Sabine Haalboom, David M. Price, Furu Mienis, Judith D. L. van Bleijswijk, Henko C. de Stigter, Harry J. Witte, Gert-Jan Reichart, and Gerard C. A. Duineveld
Biogeosciences, 17, 2499–2519, https://doi.org/10.5194/bg-17-2499-2020, https://doi.org/10.5194/bg-17-2499-2020, 2020
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Mineral mining in deep-sea hydrothermal settings will lead to the formation of plumes of fine-grained, chemically reactive, suspended matter. Understanding how natural hydrothermal plumes evolve as they disperse from their source, and how they affect their surrounding environment, may help in characterising the behaviour of the diluted part of mining plumes. The natural plume provided a heterogeneous, geochemically enriched habitat conducive to the development of a distinct microbial ecology.
Noelle A. Held, Eric A. Webb, Matthew M. McIlvin, David A. Hutchins, Natalie R. Cohen, Dawn M. Moran, Korinna Kunde, Maeve C. Lohan, Claire Mahaffey, E. Malcolm S. Woodward, and Mak A. Saito
Biogeosciences, 17, 2537–2551, https://doi.org/10.5194/bg-17-2537-2020, https://doi.org/10.5194/bg-17-2537-2020, 2020
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Trichodesmium is a globally important marine nitrogen fixer that stimulates primary production in the surface ocean. We surveyed metaproteomes of Trichodesmium populations across the North Atlantic and other oceans, and we found that they experience simultaneous phosphate and iron stress because of the biophysical limits of nutrient uptake. Importantly, nitrogenase was most abundant during co-stress, indicating the potential importance of this phenotype to global nitrogen and carbon cycling.
Helmke Hepach, Claire Hughes, Karen Hogg, Susannah Collings, and Rosie Chance
Biogeosciences, 17, 2453–2471, https://doi.org/10.5194/bg-17-2453-2020, https://doi.org/10.5194/bg-17-2453-2020, 2020
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Tropospheric iodine takes part in numerous atmospheric chemical cycles, including tropospheric ozone destruction and aerosol formation. Due to its significance for atmospheric processes, it is crucial to constrain its sources and sinks. This paper aims at investigating and understanding features of biogenic iodate-to-iodide reduction in microalgal monocultures. We find that phytoplankton senescence may play a crucial role in the release of iodide to the marine environment.
Roger D. Finlay, Shahid Mahmood, Nicholas Rosenstock, Emile B. Bolou-Bi, Stephan J. Köhler, Zaenab Fahad, Anna Rosling, Håkan Wallander, Salim Belyazid, Kevin Bishop, and Bin Lian
Biogeosciences, 17, 1507–1533, https://doi.org/10.5194/bg-17-1507-2020, https://doi.org/10.5194/bg-17-1507-2020, 2020
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Effects of biological activity on mineral weathering operate at scales ranging from short-term, microscopic interactions to global, evolutionary timescale processes. Microorganisms have had well-documented effects at large spatio-temporal scales, but to establish the quantitative significance of microscopic measurements for field-scale processes, higher-resolution studies of liquid chemistry at local weathering sites and improved upscaling to soil-scale dissolution rates are still required.
Christine Rooks, James Kar-Hei Fang, Pål Tore Mørkved, Rui Zhao, Hans Tore Rapp, Joana R. Xavier, and Friederike Hoffmann
Biogeosciences, 17, 1231–1245, https://doi.org/10.5194/bg-17-1231-2020, https://doi.org/10.5194/bg-17-1231-2020, 2020
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Sponge grounds are known as nutrient sources, providing nitrate and ammonium to the ocean. We found that they also can do the opposite: in six species from Arctic and North Atlantic sponge grounds, we measured high rates of denitrification, which remove these nutrients from the sea. Rates were highest when the sponge tissue got low in oxygen, which happens when sponges stop pumping because of stress. Sponge grounds may become nutrient sinks when exposed to stress.
Cited articles
Anning, T., Maclntyre, H. L., Sammes, S. M. P. a. P. J., Gibb, S., and Geider, R. J.: Photoacclimation in the marine diatom Skeletonema costatum, Limnol. Oceanogr., 45, 1807–1817, 2000.
Banaszak, A. T.: Photoprotective physiological and biochemical responses of aquatic organisms, in: UV effects in aquatic organisms and ecosystems, edited by: Helbling, E. W. and Zagarese, H. E., Comprehensive Series in Photosciences, Royal Society of Chemistry, Cambridge, UK, 329–356, 2003.
Breitbarth, E., Mills, M. M., Friedrichs, G., and LaRoche, J.: The Bunsen gas solubility coefficient of ethylene as a function of temperature and salinity and its importance for nitrogen fixation assays, Limnol. Oceanogr.-Meth., 2, 282–288, 2004.
Cai, X., Gao, K., Fu, F., Campbell, D., Beardall, J., and Hutchins, D.: Electron transport kinetics in the diazotrophic cyanobacterium Trichodesmium spp. grown across a range of light levels, Photosyn. Res., 124, 45–56, https://doi.org/10.1007/s11120-015-0081-5, 2015.
Campbell, D., Eriksson, M. J., Oquist, G., Gustafsson, P., and Clarke, A. K.: The cyanobacterium Synechococcus resists UV-B by exchanging photosystem II reaction-center D1 proteins, P. Natl. Acad. Sci. USA, 95, 364–369, 1998.
Capone, D.: Determination of nitrogenase activity in aquatic samples using the acetylene reduction procedure, in: Handbook of methods in aquatic microbial ecology, edited by: Kemp, P. F., Sherr, B. F., Sherr, E. B., and Cole, J. J., Lewis Publishers, Boca Raton, Fla, 621–631, 1993.
Capone, D., Zehr, J., Paerl, H., and Bergman, B.: Trichodesmium, a globally significant marine cyanobacterium, Science, 276, 1221–1227, 1997.
Capone, D. G., Subramaniaml, A., Joseph, P., Carpenters, E. J., Johansen, M., and Ronald, L.: An extensive bloom of the N2-fixing cyanobacterium Trichodesmium erythraeum in the central Arabian Sea, Mar. Ecol.-Prog. Ser., 172, 281–292, 1998.
Carpenter, E. J., Subramaniam, A., and Capone, D. G.: Biomass and primary productivity of the cyanobacterium Trichodesmium spp. in the tropical N Atlantic ocean, Deep-Sea Res. Pt I, 51, 173–203, https://doi.org/10.1016/j.dsr.2003.10.006, 2004.
Chen, Y. B., Zehr, J. P., and Mellon, M.: Growth and nitrogen fixation of the diazotrophic filamentous nonheterocystous cyanobacterium Trichodesmium sp. IMS101 in defined media: evidence for a circadian rhythm, J. Phycol., 32, 916–923, 1996.
Cleveland, J. S. and Weidemann, A. D.: Quantifying Absorption by Aquatic Particles: A Multiple Scattering Correction for Glass-Fiber, Limnol. Oceanogr., 38, 1321–1327, 1993.
Cockell, C. S. and Rothschild, L. J.: The Effects of UV Radiation A and B on Diurnal Variation in Photosynthesis in Three Taxonomically and Ecologically Diverse Microbial Mats, Photochem. Photobiol., 69, 203–210, https://doi.org/10.1111/j.1751-1097.1999.tb03274.x, 1999.
Cullen, J. J. and Neale, P. J.: Ultraviolet radiation, ozone depletion, and marine photosynthesis, Photosyn. Res., 39, 303–320, https://doi.org/10.1007/bf00014589, 1994.
Dunlap, W., Rae, G., Helbling, E., Villafañe, V., and Holm-Hansen, O.: Ultraviolet-absorbing compounds in natural assemblages of Antarctic phytoplankton, Antarct. J. US, 30, 323–326, 1995.
Fu, F.-X., Yu, E., Garcia, N. S., Gale, J., Luo, Y., Webb, E. A., and Hutchins, D. A.: Differing responses of marine N2 fixers to warming and consequences for future diazotroph community structure, Aquat. Microb. Ecol., 72, 33–46, 2014.
Gao, K., Yu, H., and Brown, M. T.: Solar PAR and UV radiation affects the physiology and morphology of the cyanobacterium Anabaena sp. PCC 7120, J. Photochem. Photobiol. B., 89, 117–124, https://doi.org/10.1016/j.jphotobiol.2007.09.006, 2007.
Garcia-Pichel, F. and Castenholz, W. R.: Occurrence of UV-absorbingmycosporine-like compounds among cyanobacterial isolates and estimationof their screening capacity, Appl. Environ. Microb., 59, 163–169, 1993.
Garczarek, L., Dufresne, A., Blot, N., Cockshutt, A. M., Peyrat, A., Campbell, D. A., Joubin, L., and Six, C.: Function and evolution of the psbA gene family in marine Synechococcus: Synechococcus sp. WH7803 as a case study, ISME J., 2, 937–953, 2008.
Genty, B., Briantais, J.-M., and Baker, N. R.: The relationship between the quantum yield of photosynthetic electron transport and quenching of chlorophyll fluorescence, Biochimica et Biophysica Acta (BBA) – General Subjects, 990, 87–92, https://doi.org/10.1016/S0304-4165(89)80016-9, 1989.
Häder, D.-P. and Gao, K.: Interactions of anthropogenic stress factors on marine phytoplankton, Frontiers in Environmental Science, 3, 1–14, 2015.
Häder, D. P., Williamson, C. E., Wangberg, S. A., Rautio, M., Rose, K. C., Gao, K., Helbling, E. W., Sinha, R. P., and Worrest, R.: Effects of UV radiation on aquatic ecosystems and interactions with other environmental factors, Photochem. Photobiol. Sci., 14, 108–126, https://doi.org/10.1039/c4pp90035a, 2015.
Helbling, W., Banaszak, A. T., and Villafañe, V. E.: Global change feed-back inhibits cyanobacterial photosynthesis, Sci. Rep., 5, 14514–14514, 2015.
Heraud, P. and Beardall, J.: Changes in chlorophyll fluorescence during exposure of Dunaliella tertiolecta to UV radiation indicate a dynamic interaction between damage and repair processes, Photosyn. Res., 63, 123–134, https://doi.org/10.1023/a:1006319802047, 2000.
Hutchins, D. A., Walworth, N. G., Webb, E. A., Saito, M. A., Moran, D., McIlvin, M. R., Gale, J., and Fu, F.-X.: Irreversibly increased nitrogen fixation in Trichodesmium experimentally adapted to elevated carbon dioxide, Nat. Commun., 6, 8155, https://doi.org/10.1038/ncomms9155, 2015.
Karsten, U., Sawall, T., and Wiencke, C.: A survey of the distribution of UV-absorbing substances in tropical macroalgae, Phycol. Res., 46, 271–279, https://doi.org/10.1046/j.1440-1835.1998.00144.x, 1998.
Kiefer, D. A. and SooHoo, J. B.: Spectral absorption by marine particles of coastal waters of Baja California, Limnol. Oceanogr., 27, 492–499, 1982.
Kranz, S. A., Levitan, O., Richter, K. U., Prasil, O., Berman-Frank, I., and Rost, B.: Combined effects of CO2 and light on the N2-fixing cyanobacterium Trichodesmium IMS101: physiological responses, Plant Physiol., 154, 334–345, https://doi.org/10.1104/pp.110.159145, 2010.
Kumar, A., Tyagi, M. B., Jha, P. N., Srinivas, G., and Singh, A.: Inactivation of cyanobacterial nitrogenase after exposure to Ultraviolet-B radiation, Curr. Microbiol., 46, 380–384, https://doi.org/10.1007/s00284-001-3894-8, 2003.
Lesser, M. P.: Effects of ultraviolet radiation on productivity and nitrogen fixation in the Cyanobacterium, Anabaena sp. (Newton's strain), Hydrobiologia, 598, 1–9, https://doi.org/10.1007/s10750-007-9126-x, 2007.
Litchman, E., Neale, P. J., and Banaszak, A. T.: Increased sensitivity to ultraviolet radiation in nitrogen-limited dinoflagellates: Photoprotection and repair, Limnol. Oceanogr., 47, 86–94, 2002.
Litchman, E. and Neale, P. J.: UV effects on photosynthesis, growth and acclimation of an estuarine diatom and cryptomonad, Mar. Ecol.-Prog. Ser., 300, 53–62, 2005.
Luo, Y.-W., Lima, I. D., Karl, D. M., Deutsch, C. A., and Doney, S. C.: Data-based assessment of environmental controls on global marine nitrogen fixation, Biogeosciences, 11, 691–708, https://doi.org/10.5194/bg-11-691-2014, 2014.
Mitchell, B. G.: Algorithms for determining the absorption coefficient for aquatic particulates using the quantitative filter technique, Orlando'90, 137–148, 1990.
Neale, P. J., Banaszak, A. T., and Jarriel, C. R.: Ultraviolet sunscreens in Gymnodinium sanguineum (Dinophyceae): mycosporine-like amino acids protect against inhibition of photosynthesis, J. Phycol., 34, 928–938, 1998.
Neale, P. J.: Spectral weighting functions for quantifying the effects of ultraviolet radiation in marine ecosystems, edited by: De Mora, S. J, Demers, S., and Vernet, M., Effects of UV Radiation on the Marine Environment, Cambridge University Press, Cambridge, UK, 73–100, 2000.
Olson, E. M., McGillicuddy, D. J., Dyhrman, S. T., Waterbury, J. B., Davis, C. S., and Solow, A. R.: The depth-distribution of nitrogen fixation by Trichodesmium spp. colonies in the tropical–subtropical North Atlantic, Deep-Sea Res. Pt. I, 104, 72–91, https://doi.org/10.1016/j.dsr.2015.06.012, 2015.
Prufert-Bebout, L., Paerl, H. W., and Lassen, C.: Growth, nitrogen fixation, and spectral attenuation in cultivated Trichodesmium species, Appl. Environ. Microb., 59, 1367–1375, 1993.
Quesada, A., Vincent, W. F., and Lean, D. R. S.: Community and pigment structure of Arctic cyanobacterial assemblages: the occurrence and distribution of UV-absorbing compounds, FEMS Microbiol. Ecol., 28, 315–323, https://doi.org/10.1111/j.1574-6941.1999.tb00586.x, 1999.
Rastogi, R. P., Sinha, R. P., Moh, S. H., Lee, T. K., Kottuparambil, S., Kim, Y. J., Rhee, J. S., Choi, E. M., Brown, M. T., Hader, D. P., and Han, T.: Ultraviolet radiation and cyanobacteria, J. Photoch. Photobio. B, 141, 154–169, https://doi.org/10.1016/j.jphotobiol.2014.09.020, 2014.
Rath, J. and Adhikary, S. P.: Response of the estuarine cyanobacterium Lyngbya aestuarii to UV-B radiation, J. Appl. Phycol., 19, 529–536, 2007.
Ritchie, R. J.: Consistent sets of spectrophotometric chlorophyll equations for acetone, methanol and ethanol solvents, Photosyn. Res., 89, 27–41, https://doi.org/10.1007/s11120-006-9065-9, 2006.
Shi, D., Kranz, S. A., Kim, J. M., and Morel, F. M. M.: Ocean acidification slows nitrogen fixation and growth in the dominant diazotroph Trichodesmium under low-iron conditions, P. Natl. Acad. Sci. USA, 109, E3094–E3100, 2012.
Shick, J. M. and Dunlap, W. C.: Mycosporine-like amino acids and related Gadusols: biosynthesis, acumulation, and UV-protective functions in aquatic organisms, Annu. Rev. Physiol., 64, 223–262, https://doi.org/10.1146/annurev.physiol.64.081501.155802, 2002.
Singh, S. P., Kumari, S., Rastogi, R. P., Singh, K. L., and Sinha, R. P.: Mycosporine-like amino acids (MAAs): chemical structure, biosynthesis and significance as UV-absorbing/screening compounds, Indian J. Exp. Biol., 46, 7–17, 2008.
Singh, S. P., Rastogi, R. P., Hader, D. P., and Sinha, R. P.: Temporal dynamics of ROS biogenesis under simulated solar radiation in the cyanobacterium Anabaena variabilis PCC 7937, Protoplasma, 251, 1223–1230, https://doi.org/10.1007/s00709-014-0630-3, 2014.
Sinha, R. P. and Häder, D.-P.: UV-protectants in cyanobacteria, Plant Sci., 174, 278–289, https://doi.org/10.1016/j.plantsci.2007.12.004, 2008.
Sinha, R. P., Singh, N., Kumar, A., Kumar, H. D., Häder, M., and Häder, D. P.: Effects of UV irradiation on certain physiological and biochemical processes in cyanobacteria, J. Photoch. Photobio. B, 32, 107–113, https://doi.org/10.1016/1011-1344(95)07205-5, 1996.
Sinha, R. P., Singh, N., Kumar, A., Kumar, H. D., and Häder, D.-P.: Impacts of ultraviolet-B irradiation on nitrogen-fixing cyanobacteria of rice paddy fields, J. Plant. Physiol., 150, 188–193, https://doi.org/10.1016/S0176-1617(97)80201-5, 1997.
Sinha, R. P., Klisch, M., Walter Helbling, E., and Häder, D.-P.: Induction of mycosporine-like amino acids (MAAs) in cyanobacteria by solar ultraviolet-B radiation, J. Photoch. Photobio. B, 60, 129–135, https://doi.org/10.1016/S1011-1344(01)00137-3, 2001.
Sinha, R. P., Ambasht, N. K., Sinha, J. P., Klisch, M., and Häder, D.-P.: UV-B-induced synthesis of mycosporine-like amino acids in three strains of Nodularia (cyanobacteria), J. Photoch. Photobio. B, 71, 51–58, https://doi.org/10.1016/j.jphotobiol.2003.07.003, 2003.
Sobrino, C. and Neale, P. J.: Short-term and long-term effects of temperature on photosynthesis in the diatom Thalassiosira Pseudonana under UVR exposures, J. Phycol., 43, 426–436, https://doi.org/10.1111/j.1529-8817.2007.00344.x, 2007.
Sohm, J. A., Webb, E. A., and Capone, D. G.: Emerging patterns of marine nitrogen fixation, Nat. Rev. Microbiol., 9, 499–508, https://doi.org/10.1038/nrmicro2594, 2011.
Spungin, D., Berman-Frank, I., and Levitan, O.: Trichodesmium's strategies to alleviate P-limitation in the future acidified oceans, Environ. Microbiol., 16, 1935–1947, https://doi.org/10.1111/1462-2920.12424, 2014.
Subramaniam, A., Carpenter, E. J., Karentz, D., and Falkowski, P. G.: Bio-optical properties of the marine diazotrophic cyanobacteria Trichodesmium spp. I. Absorption and photosynthetic action spectra, Limnol. Oceanogr., 44, 608–617, 1999.
Vernet, M. and Whitehead, K.: Release of ultraviolet-absorbing compounds by the red-tide dinoflagellate Lingulodinium polyedra, Mar. Biol., 127, 35–44, https://doi.org/10.1007/bf00993641, 1996.
Villafañe, V. E., Barbieri, E. S., and Helbling, E. W.: Annual patterns of ultraviolet radiation effects on temperate marine phytoplankton off Patagonia, Argentina, J. Plankton. Res., 26, 167–174, https://doi.org/10.1093/plankt/fbh011, 2004.
Westberry, T. K. and Siegel, D. A.: Spatial and temporal distribution of Trichodesmium blooms in the world's oceans, Global Biogeochem. Cy., 20, GB4016, https://doi.org/10.1029/2005gb002673, 2006.
Wu, H., Gao, K., Villafane, V. E., Watanabe, T., and Helbling, E. W.: Effects of solar UV radiation on morphology and photosynthesis of filamentous cyanobacterium Arthrospira platensis, Appl. Environ. Microb., 71, 5004–5013, https://doi.org/10.1128/AEM.71.9.5004-5013.2005, 2005.
Wu, H., Abasova, L., Cheregi, O., Deák, Z., Gao, K., and Vass, I.: D1 protein turnover is involved in protection of Photosystem II against UV-B induced damage in the cyanobacterium Arthrospira (Spirulina) platensis, J. Photoch. Photobio. B, 104, 320–325, https://doi.org/10.1016/j.jphotobiol.2011.01.004, 2011.
Wu, Y., Li, Z., Du, W., and Gao, K.: Physiological response of marine centric diatoms to ultraviolet radiation, with special reference to cell size, J. Photoch. Photobio. B, 153, 1–6, https://doi.org/10.1016/j.jphotobiol.2015.08.035, 2015.
Short summary
Trichodesmium is significant marine N2 fixer. We conducted short- and long-term UV exposure experiment to investigate how UV affects this organism. Our results showed N2 fixation and carbon fixation rates were significantly reduced under UV radiation. As a defense strategy, Trichodesmium is able to synthesize UV-absorbing compounds to protect from UV damage. Our results suggest that shipboard experiments in UV-opaque containers may have substantially overestimated in situ N2 fixation rate.
Trichodesmium is significant marine N2 fixer. We conducted short- and long-term UV exposure...
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