Articles | Volume 15, issue 12
https://doi.org/10.5194/bg-15-3857-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-15-3857-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Jun 2018
Research article |
| 27 Jun 2018
| 27 Jun 2018
Riverine carbon export in the arid to semiarid Wuding River catchment on the Chinese Loess Plateau
Department of Geography, The University of Hong Kong, Pokfulam Road,
Hong Kong
Mingyang Tian
School of Ecology and Environment, Inner Mongolia University, Hohhot,
China
Nufang Fang
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess
Plateau, Institute of Soil and Water Conservation, Northwest A&F
University, Yangling, China
Suiji Wang
Institute of Geographical Sciences and Natural Resources Research,
Chinese Academy of Sciences, Beijing, China
Xixi Lu
School of Ecology and Environment, Inner Mongolia University, Hohhot,
China
Department of Geography, National University of Singapore, Singapore
Xiankun Yang
School of Geographical Sciences, Guangzhou University, Guangzhou,
China
Frankie Cho
Department of Geography, The University of Hong Kong, Pokfulam Road,
Hong Kong
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Climate change is affecting mountain ecosystems intensely, including the loss of glaciers and the uphill migration of plants. How these changes will affect the streams draining these landscapes is unclear. We sampled streams across a gradient of glacier and vegetation cover in Switzerland and found glacier loss reduced the carbon dioxide sink from weathering, while vegetation cover increased dissolved organic carbon in the stream. These changes are important to consider for mountains globally.
Olga Ogneva, Gesine Mollenhauer, Bennet Juhls, Tina Sanders, Juri Palmtag, Matthias Fuchs, Hendrik Grotheer, Paul J. Mann, and Jens Strauss
Biogeosciences, 20, 1423–1441, https://doi.org/10.5194/bg-20-1423-2023, https://doi.org/10.5194/bg-20-1423-2023, 2023
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Arctic warming accelerates permafrost thaw and release of terrestrial organic matter (OM) via rivers to the Arctic Ocean. We compared particulate organic carbon (POC), total suspended matter, and C isotopes (δ13C and Δ14C of POC) in the Lena delta and Lena River along a ~1600 km transect. We show that the Lena delta, as an interface between the Lena River and the Arctic Ocean, plays a crucial role in determining the qualitative and quantitative composition of OM discharged into the Arctic Ocean.
Weitian Ding, Urumu Tsunogai, Fumiko Nakagawa, Takashi Sambuichi, Masaaki Chiwa, Tamao Kasahara, and Ken'ichi Shinozuka
Biogeosciences, 20, 753–766, https://doi.org/10.5194/bg-20-753-2023, https://doi.org/10.5194/bg-20-753-2023, 2023
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By monitoring the concentration and Δ17O of stream nitrate in three forested streams, the new nitrogen saturation index of forested catchments (Matm/Datm ratio) was estimated. We found that (1) the unprocessed atmospheric nitrate in our studied forested stream (FK1 catchment) was the highest ever reported in forested streams; (2) the Matm/Datm ratio can be used as a robust index for evaluating nitrogen saturation in forested catchments as the Matm/Datm ratio is independent of the precipitation.
Kirstin Dähnke, Tina Sanders, Yoana Voynova, and Scott D. Wankel
Biogeosciences, 19, 5879–5891, https://doi.org/10.5194/bg-19-5879-2022, https://doi.org/10.5194/bg-19-5879-2022, 2022
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Nitrogen is an important macronutrient that fuels algal production in rivers and coastal regions. We investigated the production and removal of nitrogen-bearing compounds in the freshwater section of the tidal Elbe Estuary and found that particles in the water column are key for the production and removal of water column nitrate. Using a stable isotope approach, we pinpointed regions where additional removal of nitrate or input from sediments plays an important role in estuarine biogeochemistry.
Tamara Michaelis, Anja Wunderlich, Ömer K. Coskun, William Orsi, Thomas Baumann, and Florian Einsiedl
Biogeosciences, 19, 4551–4569, https://doi.org/10.5194/bg-19-4551-2022, https://doi.org/10.5194/bg-19-4551-2022, 2022
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The greenhouse gas methane (CH4) drives climate change. Microorganisms in river sediments produce CH4 when degrading organic matter, but the contribution of rivers to atmospheric CH4 concentrations is uncertain. To better understand riverine CH4 cycling, we measured concentration profiles of CH4 and relevant reactants that might influence the CH4 cycle. We found substantial CH4 production, especially in fine, organic-rich sediments during summer and signs of microbial CH4 consumption.
James C. Stegen, Sarah J. Fansler, Malak M. Tfaily, Vanessa A. Garayburu-Caruso, Amy E. Goldman, Robert E. Danczak, Rosalie K. Chu, Lupita Renteria, Jerry Tagestad, and Jason Toyoda
Biogeosciences, 19, 3099–3110, https://doi.org/10.5194/bg-19-3099-2022, https://doi.org/10.5194/bg-19-3099-2022, 2022
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Rivers are vital to Earth, and in rivers, organic matter (OM) is an energy source for microbes that make greenhouse gas and remove contaminants. Predicting Earth’s future requires understanding how and why river OM is transformed. Our results help meet this need. We found that the processes influencing OM transformations diverge between river water and riverbed sediments. This can be used to build new models for predicting the future of rivers and, in turn, the Earth system.
Alexandra Klemme, Tim Rixen, Denise Müller-Dum, Moritz Müller, Justus Notholt, and Thorsten Warneke
Biogeosciences, 19, 2855–2880, https://doi.org/10.5194/bg-19-2855-2022, https://doi.org/10.5194/bg-19-2855-2022, 2022
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Tropical peat-draining rivers contain high amounts of carbon. Surprisingly, measured carbon dioxide (CO2) emissions from those rivers are comparatively moderate. We compiled data from 10 Southeast Asian rivers and found that CO2 production within these rivers is hampered by low water pH, providing a natural threshold for CO2 emissions. Furthermore, we find that enhanced carbonate input, e.g. caused by human activities, suspends this natural threshold and causes increased CO2 emissions.
Amy E. Pickard, Marcella Branagan, Mike F. Billett, Roxane Andersen, and Kerry J. Dinsmore
Biogeosciences, 19, 1321–1334, https://doi.org/10.5194/bg-19-1321-2022, https://doi.org/10.5194/bg-19-1321-2022, 2022
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Peatlands have been subject to a range of land management regimes over the past century. This has affected the amount of carbon that drains into surrounding streams and rivers. In our study, we measured carbon concentrations in streams draining from drained, non-drained, and restored areas of the Flow Country blanket bog in N Scotland. We found that drained peatland had higher concentrations and fluxes of carbon relative to non-drained areas. Restored peatland areas were highly variable.
Brynn O'Donnell and Erin R. Hotchkiss
Biogeosciences, 19, 1111–1134, https://doi.org/10.5194/bg-19-1111-2022, https://doi.org/10.5194/bg-19-1111-2022, 2022
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A stream is defined by flowing water, but higher flow from storms is also a frequent disturbance. This paper tests how higher flow changes stream metabolism (respiration and photosynthesis, R and P). P was less resistant to changes in flow compared to R, and P took longer to recover from storms than R (2.2 versus 0.6 d). Further work on metabolic responses to flow disturbance is critical given projected increases in storms and the influence of higher flows on ecosystem health and functioning.
Thibault Lambert, Pascal Perolo, Nicolas Escoffier, and Marie-Elodie Perga
Biogeosciences, 19, 187–200, https://doi.org/10.5194/bg-19-187-2022, https://doi.org/10.5194/bg-19-187-2022, 2022
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The bacterial mineralization of dissolved organic matter (DOM) in inland waters contributes to CO2 emissions to the atmosphere. Human activities affect DOM sources. However, the implications on DOM mineralization are poorly known. Combining sampling and incubations, we showed that higher bacterial respiration in agro-urban streams related to a labile pool from aquatic origin. Therefore, human activities may have a limited impact on the net carbon exchanges between inland waters and atmosphere.
Boyi Liu, Mingyang Tian, Kaimin Shih, Chun Ngai Chan, Xiankun Yang, and Lishan Ran
Biogeosciences, 18, 5231–5245, https://doi.org/10.5194/bg-18-5231-2021, https://doi.org/10.5194/bg-18-5231-2021, 2021
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Spatial and temporal patterns of pCO2 in the subtropical Dong River basin were mainly affected by C inputs and in-stream metabolism, both of which varied due to differential catchment settings, land cover, and hydrological conditions. CO2 fluxes in the wet season were 2-fold larger than in the dry season due to high pCO2 and turbulence caused by high flow velocity. The absence of high CO2 fluxes in small rivers could be associated with the depletion effect caused by abundant precipitation.
Sergey N. Vorobyev, Jan Karlsson, Yuri Y. Kolesnichenko, Mikhail A. Korets, and Oleg S. Pokrovsky
Biogeosciences, 18, 4919–4936, https://doi.org/10.5194/bg-18-4919-2021, https://doi.org/10.5194/bg-18-4919-2021, 2021
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In order to quantify riverine carbon (C) exchange with the atmosphere in permafrost regions, we report a first assessment of CO2 and CH4 concentration and fluxes of the largest permafrost-affected river, the Lena River, during the peak of spring flow. The results allowed identification of environmental factors controlling GHG concentrations and emission in the Lena River watershed; this new knowledge can be used for foreseeing future changes in C balance in permafrost-affected Arctic rivers.
Jan Greiwe, Markus Weiler, and Jens Lange
Biogeosciences, 18, 4705–4715, https://doi.org/10.5194/bg-18-4705-2021, https://doi.org/10.5194/bg-18-4705-2021, 2021
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We analyzed variability in diel nitrate patterns at three locations in a lowland stream. Comparison of time lags between monitoring sites with water travel time indicated that diel patterns were created by in-stream processes rather than transported downstream from an upstream point of origin. Most of the patterns (70 %) could be explained by assimilatory nitrate uptake. The remaining patterns suggest seasonally varying dominance and synchronicity of different biochemical processes.
Matthias Pucher, Peter Flödl, Daniel Graeber, Klaus Felsenstein, Thomas Hein, and Gabriele Weigelhofer
Biogeosciences, 18, 3103–3122, https://doi.org/10.5194/bg-18-3103-2021, https://doi.org/10.5194/bg-18-3103-2021, 2021
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Dissolved organic matter is an important carbon source in aquatic ecosystems, yet the uptake processes are not totally understood. We found evidence for the release of degradation products, efficiency loss in the uptake with higher concentrations, stimulating effects, and quality-dependent influences from the benthic zone. To conduct this analysis, we included interactions in the equations of the nutrient spiralling concept and solve it with a Bayesian non-linear fitting algorithm.
Xin Wang, Ting Liu, Liang Wang, Zongguang Liu, Erxiong Zhu, Simin Wang, Yue Cai, Shanshan Zhu, and Xiaojuan Feng
Biogeosciences, 18, 3015–3028, https://doi.org/10.5194/bg-18-3015-2021, https://doi.org/10.5194/bg-18-3015-2021, 2021
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We show a comprehensive monitoring dataset on the discharge and carbon transport in a small alpine river on the Qinghai–Tibetan Plateau, where riverine carbon increased downstream in the pre-monsoon season due to an increasing contribution of organic matter derived from seasonal permafrost thaw while it fluctuated in the monsoon season induced by sporadic precipitation. These results indicate a high sensitivity of riverine carbon in alpine headwater catchments to local hydrological events.
Man Zhao, Liesbet Jacobs, Steven Bouillon, and Gerard Govers
Biogeosciences, 18, 1511–1523, https://doi.org/10.5194/bg-18-1511-2021, https://doi.org/10.5194/bg-18-1511-2021, 2021
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We investigate the relative importance of two individual factors (hydrodynamical disturbance and aquatic microbial community) that possibly control SOC decomposition rates in river systems. We found aquatic microbial organisms led to rapid SOC decomposition, while effect of mechanical disturbance is relative minor. We propose a simple conceptual model: hydrodynamic disturbance is only important when soil aggregates are strong enough to withstand the disruptive forces imposed by water immersions.
Lyla L. Taylor, Charles T. Driscoll, Peter M. Groffman, Greg H. Rau, Joel D. Blum, and David J. Beerling
Biogeosciences, 18, 169–188, https://doi.org/10.5194/bg-18-169-2021, https://doi.org/10.5194/bg-18-169-2021, 2021
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Enhanced rock weathering (ERW) is a carbon dioxide removal (CDR) strategy involving soil amendments with silicate rock dust. Over 15 years, a small silicate application led to net CDR of 8.5–11.5 t CO2/ha in an acid-rain-impacted New Hampshire forest. We accounted for the total carbon cost of treatment and compared effects with an adjacent, untreated forest. Our results suggest ERW can improve the greenhouse gas balance of similar forests in addition to mitigating acid rain effects.
Scott Zolkos, Suzanne E. Tank, Robert G. Striegl, Steven V. Kokelj, Justin Kokoszka, Cristian Estop-Aragonés, and David Olefeldt
Biogeosciences, 17, 5163–5182, https://doi.org/10.5194/bg-17-5163-2020, https://doi.org/10.5194/bg-17-5163-2020, 2020
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High-latitude warming thaws permafrost, exposing minerals to weathering and fluvial transport. We studied the effects of abrupt thaw and associated weathering on carbon cycling in western Canada. Permafrost collapse affected < 1 % of the landscape yet enabled carbonate weathering associated with CO2 degassing in headwaters and increased bicarbonate export across watershed scales. Weathering may become a driver of carbon cycling in ice- and mineral-rich permafrost terrain across the Arctic.
Yingjie Cao, Yingxue Xuan, Changyuan Tang, Shuai Guan, and Yisheng Peng
Biogeosciences, 17, 3875–3890, https://doi.org/10.5194/bg-17-3875-2020, https://doi.org/10.5194/bg-17-3875-2020, 2020
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About half of the global CO2 sequestration due to chemical weathering occurs in warm and high-runoff regions. To evaluate the temporary and net sinks of atmospheric CO2 due to chemical weathering, we selected a typical subtropical catchment as our study area and did fieldwork to sample surface water along the main channel and major tributaries in 1 hydrological year. The result of mass balance calculation showed that human activities dramatically decreased the CO2 net sink.
Laure Gandois, Alison M. Hoyt, Stéphane Mounier, Gaël Le Roux, Charles F. Harvey, Adrien Claustres, Mohammed Nuriman, and Gusti Anshari
Biogeosciences, 17, 1897–1909, https://doi.org/10.5194/bg-17-1897-2020, https://doi.org/10.5194/bg-17-1897-2020, 2020
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Worldwide, peatlands are important sources of dissolved organic matter (DOM) and trace metals (TMs) to surface waters, and these fluxes may increase with peatland degradation. In Southeast Asia, tropical peatlands are being rapidly deforested and drained. This work aims to address the fate of organic carbon and its role as a trace metal carrier in drained peatlands of Indonesia.
Xiaohui Zhang, Moritz Müller, Shan Jiang, Ying Wu, Xunchi Zhu, Aazani Mujahid, Zhuoyi Zhu, Mohd Fakharuddin Muhamad, Edwin Sien Aun Sia, Faddrine Holt Ajon Jang, and Jing Zhang
Biogeosciences, 17, 1805–1819, https://doi.org/10.5194/bg-17-1805-2020, https://doi.org/10.5194/bg-17-1805-2020, 2020
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This study offered detailed information on dFe concentrations, distribution and the magnitude of yield in the Rajang River, the largest river in Malaysia. Three blackwater rivers, draining from peatlands, were also included in our study. Compared with the Rajang River, the dFe concentrations and yield from three blackwater rivers were much higher. The precipitation and agricultural activities, such as palm oil plantations, may markedly increase the concentration dFe in these tropical rivers.
Caroline Coch, Bennet Juhls, Scott F. Lamoureux, Melissa J. Lafrenière, Michael Fritz, Birgit Heim, and Hugues Lantuit
Biogeosciences, 16, 4535–4553, https://doi.org/10.5194/bg-16-4535-2019, https://doi.org/10.5194/bg-16-4535-2019, 2019
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Climate change affects Arctic ecosystems. This includes thawing of permafrost (ground below 0 °C) and an increase in rainfall. Both have substantial impacts on the chemical composition of river water. We compared the composition of small rivers in the low and high Arctic with the large Arctic rivers. In comparison, dissolved organic matter in the small rivers is more susceptible to degradation; thus, it could potentially increase carbon dioxide emissions. Rainfall events have a similar effect.
Benedikt J. Werner, Andreas Musolff, Oliver J. Lechtenfeld, Gerrit H. de Rooij, Marieke R. Oosterwoud, and Jan H. Fleckenstein
Biogeosciences, 16, 4497–4516, https://doi.org/10.5194/bg-16-4497-2019, https://doi.org/10.5194/bg-16-4497-2019, 2019
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Increased dissolved organic carbon (DOC) concentration in streams can pose a threat to downstream water resources. Analyzing data from an in-stream probe we found that hydroclimatic and hydrological drivers can describe up to 72 % of the observed DOC concentration and composition variability. Variability was found to be highest during discharge events with warm and dry preconditions. The findings suggest an impact of climate change on DOC exports and thus also on downstream water quality.
Shan Jiang, Moritz Müller, Jie Jin, Ying Wu, Kun Zhu, Guosen Zhang, Aazani Mujahid, Tim Rixen, Mohd Fakharuddin Muhamad, Edwin Sien Aun Sia, Faddrine Holt Ajon Jang, and Jing Zhang
Biogeosciences, 16, 2821–2836, https://doi.org/10.5194/bg-16-2821-2019, https://doi.org/10.5194/bg-16-2821-2019, 2019
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Three cruises were conducted in the Rajang River estuary, Malaysia. The results revealed that the decomposition of terrestrial organic matter and the subsequent soil leaching were the main sources of dissolved inorganic nitrogen (DIN) in the fresh river water. Porewater exchange and ammonification enhanced DIN concentrations in the estuary water, while intensities of DIN addition varied between seasons. The riverine DIN flux could reach 101.5 ton(N) / d, supporting the coastal primary producers.
Edwin Sien Aun Sia, Jing Zhang, Shan Jiang, Zhuoyi Zhu, Gonzalo Carrasco, Faddrine Holt Jang, Aazani Mujahid, and Moritz Müller
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-219, https://doi.org/10.5194/bg-2019-219, 2019
Revised manuscript not accepted
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Nutrient loads carried by large rivers and discharged into the continental shelf and coastal waters are vital to support primary production. Our knowledge of tropical river systems is fragmented with very few seasonal studies available for Southeast Asia (SEA). We present data from three sampling campaigns on the longest river in Malaysia, the Rajang river. Our results show the generalization of SEA as a nutrient hotspot might not hold true for all regions and requires further investigation.
Brian C. Doyle, Elvira de Eyto, Mary Dillane, Russell Poole, Valerie McCarthy, Elizabeth Ryder, and Eleanor Jennings
Biogeosciences, 16, 1053–1071, https://doi.org/10.5194/bg-16-1053-2019, https://doi.org/10.5194/bg-16-1053-2019, 2019
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This study explores the drivers of variation in the water colour of rivers, and hence organic carbon export, in a blanket peatland catchment. We used 6 years of weekly river water colour data (2011 to 2016) from three proximate river sub-catchments in western Ireland. in tandem with a range of topographical, hydrological and climate data, to discover the principle environmental drivers controlling changes in colour concentration in the rivers.
Manab Kumar Dutta, Sanjeev Kumar, Rupa Mukherjee, Prasun Sanyal, and Sandip Kumar Mukhopadhyay
Biogeosciences, 16, 289–307, https://doi.org/10.5194/bg-16-289-2019, https://doi.org/10.5194/bg-16-289-2019, 2019
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The study focused on understanding C biogeochemistry of two adjacently located estuaries undergoing different levels of anthropogenic stresses. Different parameters related to C cycling were measured in an anthropogenically influenced and a mangrove-dominated estuary. Although the entire estuarine system acted as a source of carbon dioxide to the regional atmosphere, emission approximately 17 times higher was noticed from the anthropogenically affected estuary compared to mangrove-dominated one.
Ivan V. Krickov, Artem G. Lim, Rinat M. Manasypov, Sergey V. Loiko, Liudmila S. Shirokova, Sergey N. Kirpotin, Jan Karlsson, and Oleg S. Pokrovsky
Biogeosciences, 15, 6867–6884, https://doi.org/10.5194/bg-15-6867-2018, https://doi.org/10.5194/bg-15-6867-2018, 2018
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We tested the effect of climate, permafrost and physio-geographical landscape parameters on particulate C, N and P concentrations in small- and medium- sized rivers in the Western Siberian Lowland (WSL). We discovered a maximum of particulate C and N concentrations at the beginning of the permafrost appearance. A northward shift of permafrost boundaries may increase the particulate C and N export by WSL rivers to the Arctic Ocean by a factor of 2.
Wenjing Liu, Zhifang Xu, Huiguo Sun, Tong Zhao, Chao Shi, and Taoze Liu
Biogeosciences, 15, 4955–4971, https://doi.org/10.5194/bg-15-4955-2018, https://doi.org/10.5194/bg-15-4955-2018, 2018
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The southeastern coastal region is the top acid-rain-impacted area in China. It is worth evaluating the acid deposition impacts on chemical weathering and CO2 consumption there. River water geochemistry evidenced an overestimation of CO2 sequestration if H2SO4/HNO3 involvement was ignored, which accounted for 33.6 % of the total flux by silicate weathering in this area. This study quantitatively highlights the anthropogenic acid effects on chemical weathering and associated CO2 consumption.
Thi Phuong Quynh Le, Cyril Marchand, Cuong Tu Ho, Nhu Da Le, Thi Thuy Duong, XiXi Lu, Phuong Kieu Doan, Trung Kien Nguyen, Thi Mai Huong Nguyen, and Duy An Vu
Biogeosciences, 15, 4799–4814, https://doi.org/10.5194/bg-15-4799-2018, https://doi.org/10.5194/bg-15-4799-2018, 2018
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The Red River is a typical south-east Asian river, strongly affected by climate and human activity. This study showed the spatial and seasonal variability of CO2 emissions at the water–air interface of the lower part of this river due to natural conditions (meteo-hydrological-geomorphological characteristics) and human activities (dam impoundment, population, land use). The Red River water was supersaturated with CO2, providing a mean water–air CO2 flux of 530 ± 17 mmol m−2 d−1.
Wei Wen Wong, Jesse Pottage, Fiona Y. Warry, Paul Reich, Keryn L. Roberts, Michael R. Grace, and Perran L. M. Cook
Biogeosciences, 15, 3953–3965, https://doi.org/10.5194/bg-15-3953-2018, https://doi.org/10.5194/bg-15-3953-2018, 2018
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Over-enrichment of nitrate can pose substantial risk to the quality of freshwater ecosystems. Hence, understanding the dynamics of nitrate is the key to better management of waterways. This study evaluates the relationship between the effects of land use and rainfall on the major sources and processing of nitrate within and between five streams in five catchments spanning an agricultural land use gradient. We found that rainfall exerted significant control over the fate of nitrate.
Robert O. Hall Jr. and Hilary L. Madinger
Biogeosciences, 15, 3085–3092, https://doi.org/10.5194/bg-15-3085-2018, https://doi.org/10.5194/bg-15-3085-2018, 2018
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Streams exchange oxygen with the atmosphere, but this rate is difficult to measure. We added argon to small mountain streams to estimate gas exchange. We compared these rates with sulfur hexafluoride, an intense greenhouse gas. Argon worked well to measure gas exchange, but had higher-than-predicted rates than sulfur hexafluoride. Argon exchange is more likely to represent that for oxygen because they share similar physical properties. We suggest argon to measure gas exchange in small streams.
Ji-Hyung Park, Omme K. Nayna, Most S. Begum, Eliyan Chea, Jens Hartmann, Richard G. Keil, Sanjeev Kumar, Xixi Lu, Lishan Ran, Jeffrey E. Richey, Vedula V. S. S. Sarma, Shafi M. Tareq, Do Thi Xuan, and Ruihong Yu
Biogeosciences, 15, 3049–3069, https://doi.org/10.5194/bg-15-3049-2018, https://doi.org/10.5194/bg-15-3049-2018, 2018
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Human activities are drastically altering water and material flows in river systems across Asia. This review provides a conceptual framework for assessing the human impacts on Asian river C fluxes and an update on anthropogenic alterations of riverine C fluxes, focusing on the impacts of water pollution and river impoundments on CO2 outgassing from the rivers draining South, Southeast, and East Asian regions that account for the largest fraction of river discharge and C exports from Asia.
Chung-Te Chang, Jr-Chuan Huang, Lixin Wang, Yu-Ting Shih, and Teng-Chiu Lin
Biogeosciences, 15, 2379–2391, https://doi.org/10.5194/bg-15-2379-2018, https://doi.org/10.5194/bg-15-2379-2018, 2018
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Our analysis of ion input–output budget illustrates that hydrochemical responses to typhoon storms are distinctly different from those of regular storms. In addition, even mild land use change may have large impacts on nutrient exports/losses. We propose that hydrological models should separate hydrochemical processes into regular and extreme conditions to better capture the whole spectrum of hydrochemical responses to a variety of climate conditions.
Camille Minaudo, Florence Curie, Yann Jullian, Nathalie Gassama, and Florentina Moatar
Biogeosciences, 15, 2251–2269, https://doi.org/10.5194/bg-15-2251-2018, https://doi.org/10.5194/bg-15-2251-2018, 2018
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We developed the model QUALity-NETwork (QUAL-NET) to simulate water quality variations in large drainage networks. This model is accurate enough to represent processes occurring over short periods of time such as storm events and helps to fully understand water quality variations in stream networks in the context of climate change and varying human pressures. It was tested on the Loire River and provided good performances and a new understanding of the functioning of the river.
Michael P. Schwab, Julian Klaus, Laurent Pfister, and Markus Weiler
Biogeosciences, 15, 2177–2188, https://doi.org/10.5194/bg-15-2177-2018, https://doi.org/10.5194/bg-15-2177-2018, 2018
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We studied the diel fluctuations of dissolved organic carbon (DOC) concentrations in a small stream in Luxembourg. We identified an increased proportion of DOC from terrestrial sources as responsible for the peaks in DOC in the afternoon. Warmer water temperatures in the riparian zone in the afternoon increased the amount of water flowing towards the stream. Consequently, an increased amount of DOC-rich water from the riparian zone was entering the stream.
Trent R. Marwick, Fredrick Tamooh, Bernard Ogwoka, Alberto V. Borges, François Darchambeau, and Steven Bouillon
Biogeosciences, 15, 1683–1700, https://doi.org/10.5194/bg-15-1683-2018, https://doi.org/10.5194/bg-15-1683-2018, 2018
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A 2-year biogeochemical record provides annual sediment and element flux estimates for the non-dammed Sabaki River, Kenya, establishing a baseline for future research in light of impending construction of the first major upstream reservoir. Over 80 % of material fluxes occur across the wet season, with annual yields comparable to the adjacent, and dammed, Tana River. Observations at low-flow periods suggest large mammalian herbivores may be vectors of terrestrial subsidies to the water column.
Loris Deirmendjian, Denis Loustau, Laurent Augusto, Sébastien Lafont, Christophe Chipeaux, Dominique Poirier, and Gwenaël Abril
Biogeosciences, 15, 669–691, https://doi.org/10.5194/bg-15-669-2018, https://doi.org/10.5194/bg-15-669-2018, 2018
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Carbon leaching to streams represents a very small (~ 2 %) fraction of forest net ecosystem exchange (NEE). Such weak export of carbon from forest ecosystems, at least in temperate regions, is at odds with recent studies that attempt to integrate the contribution of inland waters in the continent carbon budget. Understanding why local and global carbon mass balances strongly diverge on the proportion of land NEE exported to aquatic systems is a major challenge for research in this field.
Katrin Magin, Celia Somlai-Haase, Ralf B. Schäfer, and Andreas Lorke
Biogeosciences, 14, 5003–5014, https://doi.org/10.5194/bg-14-5003-2017, https://doi.org/10.5194/bg-14-5003-2017, 2017
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We analyzed the relationship between terrestrial net primary production (NPP) and the rate at which carbon is exported from catchments in a temperate stream network. The carbon exported by streams and rivers corresponds to 2.7 % of the terrestrial NPP. CO2 evasion and downstream transport contribute about equally to this flux. A review of existing studies suggests that the catchment-specific carbon export varies in a relatively narrow range across different study regions and spatial scales.
Rémi Dupas, Andreas Musolff, James W. Jawitz, P. Suresh C. Rao, Christoph G. Jäger, Jan H. Fleckenstein, Michael Rode, and Dietrich Borchardt
Biogeosciences, 14, 4391–4407, https://doi.org/10.5194/bg-14-4391-2017, https://doi.org/10.5194/bg-14-4391-2017, 2017
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Carbon and nutrient export regimes were analyzed from archetypal headwater catchments to
downstream reaches. In headwater catchments, land use and lithology determine
land-to-stream C, N and P transfer processes. The crucial role of riparian
zones in C, N and P coupling was investigated. In downstream reaches,
point-source contributions and in-stream processes alter C, N and P export
regimes.
Rose M. Smith, Sujay S. Kaushal, Jake J. Beaulieu, Michael J. Pennino, and Claire Welty
Biogeosciences, 14, 2831–2849, https://doi.org/10.5194/bg-14-2831-2017, https://doi.org/10.5194/bg-14-2831-2017, 2017
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Urban streams receive excess nitrogen from numerous sources. We hypothesized that variations in carbon availability and subsurface infrastructure influence emissions of N2O and other greenhouse gases (CH4 and CO2) as excess N is utilized by microbes. We sampled eight streams draining four categories of stormwater and sanitary infrastructure. Dissolved nitrogen concentration was the strongest predictor of CO2 and N2O concentrations, while C : N ratio was the strongest predictor of CH4 in streams.
Cited articles
Abril, G., Martinez, J.-M., Artigas, L. F., Moreira-Turcq, P., Benedetti, M.
F., Vidal, L., Meziane, T., Kim, J.-H., Bernardes, M. C., and Savoye, N.:
Amazon River carbon dioxide outgassing fuelled by wetlands, Nature, 505,
395–398, 2014.
Alin, S. R., Aalto, R., Goni, M. A., Richey, J. E., and Dietrich, W. E.:
Biogeochemical characterization of carbon sources in the Strickland and Fly
rivers, Papua New Guinea, J. Geophys. Res.-Earth, 113, F01S05,
https://doi.org/10.1029/2006JF000625, 2008.
Barros, N., Cole, J. J., Tranvik, L. J., Prairie, Y. T., Bastviken, D.,
Huszar, V. L., Del Giorgio, P., and Roland, F.: Carbon emission from
hydroelectric reservoirs linked to reservoir age and latitude, Nat. Geosci.,
4, 593–596, 2011.
Battin, T. J., Luyssaert, S., Kaplan, L. A., Aufdenkampe, A. K., Richter, A.,
and Tranvik, L. J.: The boundless carbon cycle, Nat. Geosci., 2, 598–600,
2009.
Brunet, F., Dubois, K., Veizer, J., Nkoue Ndondo, G. R., Ndam Ngoupayou, J.
R., Boeglin, J. L., and Probst, J. L.: Terrestrial and fluvial carbon fluxes
in a tropical watershed: Nyong basin, Cameroon, Chem. Geol., 265, 563–572,
2009.
Butman, D. and Raymond, P. A.: Significant efflux of carbon dioxide from
streams and rivers in the United States, Nat. Geosci., 4, 839–842, 2011.
Chen, J., Wang, F., Meybeck, M., He, D., Xia, X., and Zhang, L.: Spatial and
temporal analysis of water chemistry records (1958–2000) in the Huanghe
(Yellow River) basin, Global Biogeochem. Cy., 19, GB3016,
https://doi.org/10.1029/2004gb002325, 2005.
Clow, D. W., Stackpoole, S. M., Verdin, K. L., Butman, D. E., Zhu, Z.,
Krabbenhoft, D. P., and Striegl, R. G.: Organic carbon burial in lakes and
reservoirs of the conterminous United States, Environ. Sci. Technol., 49,
7614–7622, 2015.
Cole, J. J., Prairie, Y. T., Caraco, N. F., McDowell, W. H., Tranvik, L. J.,
Striegl, R. G., Duarte, C. M., Kortelainen, P., Downing, J. A., Middelburg,
J. J., and Melack, J.: Plumbing the global carbon cycle: Integrating inland
waters into the terrestrial carbon budget, Ecosystems, 10, 171–184, 2007.
Deemer, B. R., Harrison, J. A., Li, S., Beaulieu, J. J., DelSontro, T.,
Barros, N., Bezerra-Neto, J. F., Powers, S. M., dos Santos, M. A., and Vonk,
J. A.: Greenhouse gas emissions from reservoir water surfaces: a new global
synthesis, BioScience, 66, 949–964, 2016.
Deirmendjian, L. and Abril, G.: Carbon dioxide degassing at the
groundwater-stream-atmosphere interface: isotopic equilibration and
hydrological mass balance in a sandy watershed, J. Hydrol., 558, 129–143,
2018.
Doctor, D. H., Kendall, C., Sebestyen, S. D., Shanley, J. B., Ohte, N., and
Boyer, E. W.: Carbon isotope fractionation of dissolved inorganic carbon
(DIC) due to outgassing of carbon dioxide from a headwater stream, Hydrol.
Process., 22, 2410–2423, 2008.
Drake, T. W., Raymond, P. A., and Spencer, R. G.: Terrestrial carbon inputs
to inland waters: A current synthesis of estimates and uncertainty, Limnology
and Oceanography Letters, 3, 132–142, 2017.
Fu, X., Shao, M., Wei, X., and Wang, H.: Soil respiration as affected by
vegetation types in a semiarid region of China, Soil Sci. Plant Nutr., 59,
715–726, 2013.
Geldern, R., Schulte, P., Mader, M., Baier, A., and Barth, J. A.: Spatial and
temporal variations of pCO2, dissolved inorganic carbon and stable
isotopes along a temperate karstic watercourse, Hydrol. Process., 29,
3423–3440, 2015.
Gillon, M., Barbecot, F., Gibert, E., Plain, C., Corcho-Alvarado, J. A., and
Massault, M.: Controls on 13C and 14C variability in soil
CO2, Geoderma, 189–190, 431–441, 2012.
Hanson, P., Edwards, N., Garten, C. T., and Andrews, J.: Separating root and
soil microbial contributions to soil respiration: a review of methods and
observations, Biogeochemistry, 48, 115–146, 2000.
He, Y., He, S., Hu, Z., Qin, Y., and Zhang, Y.: The devastating 26 July 2017
floods in Yulin City, Northern Shaanxi, China, Geomatics, Natural Hazards and
Risk, 9, 70–78, 2018.
Hemingway, J. D., Schefuß, E., Spencer, R. G., Dinga, B. J., Eglinton, T.
I., McIntyre, C., and Galy, V. V.: Hydrologic controls on seasonal and
inter-annual variability of Congo River particulate organic matter source and
reservoir age, Chem. Geol., 466, 454–465, 2017.
Hernes, P. J., Spencer, R. G., Dyda, R. Y., Pellerin, B. A., Bachand, P. A.,
and Bergamaschi, B. A.: The role of hydrologic regimes on dissolved organic
carbon composition in an agricultural watershed, Geochim. Cosmochim. Ac., 72,
5266–5277, 2008.
Jia, X., Shao, M. A., and Wei, X.: Soil CO2 efflux in response to the
addition of water and fertilizer in temperate semiarid grassland in northern
China, Plant Soil, 373, 125–141, 2013.
Jung, B.-J., Lee, J.-K., Kim, H., and Park, J.-H.: Export, biodegradation,
and disinfection byproduct formation of dissolved and particulate organic
carbon in a forested headwater stream during extreme rainfall events,
Biogeosciences, 11, 6119–6129, https://doi.org/10.5194/bg-11-6119-2014,
2014.
Kastowski, M., Hinderer, M., and Vecsei, A.: Long-term carbon burial in
European lakes: Analysis and estimate, Global Biogeochem. Cy., 25, GB3019,
https://doi.org/10.1029/2010GB003874, 2011.
Knoll, L. B., Vanni, M. J., Renwick, W. H., Dittman, E. K., and Gephart, J.
A.: Temperate reservoirs are large carbon sinks and small CO2
sources: Results from high-resolution carbon budgets, Global Biogeochem. Cy.,
27, 52–64, 2013.
Lauerwald, R., Laruelle, G. G., Hartmann, J., Ciais, P., and Regnier, P. A.:
Spatial patterns in CO2 evasion from the global river network, Global
Biogeochem. Cy., 29, 534–554, 2015.
Lee, C. J., Hirsch, R. M., Schwarz, G. E., Holtschlag, D. J., Preston, S. D.,
Crawford, C. G., and Vecchia, A. V.: An evaluation of methods for estimating
decadal stream loads, J. Hydrol., 542, 185–203, 2016.
Lee, K. Y., van Geldern, R., and Barth, J. A.: A high-resolution carbon
balance in a small temperate catchment: Insights from the Schwabach River,
Germany, Appl. Geochem., 85, 86–96, 2017.
Li, L.-J., Zhang, L., Wang, H., Wang, J., Yang, J.-W., Jiang, D.-J., Li,
J.-Y., and Qin, D.-Y.: Assessing the impact of climate variability and human
activities on streamflow from the Wuding River basin in China, Hydrol.
Process., 21, 3485–3491, 2007.
Liu, W. and Xing, M.: Isotopic indicators of carbon and nitrogen cycles in
river catchments during soil erosion in the arid Loess Plateau of China,
Chem. Geol., 296, 66–72, 2012.
Ludwig, W., Probst, J. L., and Kempe, S.: Predicting the oceanic input of
organic carbon by continental erosion, Global Biogeochem. Cy., 10, 23–41,
1996.
Luyssaert, S., Inglima, I., Jung, M., Richardson, A. D., Reichstein, M.,
Papale, D., Piao, S., Schulze, E., Wingate, L., and Matteucci, G.:
CO2 balance of boreal, temperate, and tropical forests derived from a
global database, Glob. Change Biol., 13, 2509–2537, 2007.
Marx, A., Dusek, J., Jankovec, J., Sanda, M., Vogel, T., Geldern, R.,
Hartmann, J., and Barth, J.: A review of CO2 and associated carbon
dynamics in headwater streams: a global perspective, Rev. Geophys., 55,
560–585, 2017.
Mayorga, E., Aufdenkampe, A. K., Masiello, C. A., Krusche, A. V., Hedges, J.
I., Quay, P. D., Richey, J. E., and Brown, T. A.: Young organic matter as a
source of carbon dioxide outgassing from Amazonian rivers, Nature, 436,
538–541, 2005.
McCallister, S. L. and del Giorgio, P. A.: Evidence for the respiration of
ancient terrestrial organic C in northern temperate lakes and streams, P.
Natl. Acad. Sci. USA, 109, 16963–16968, 2012.
Mendonça, R., Müller, R. A., Clow, D., Verpoorter, C., Raymond, P.,
Tranvik, L. J., and Sobek, S.: Organic carbon burial in global lakes and
reservoirs, Nat. Commun., 8, 1694, https://doi.org/10.1038/s41467-017-01789-6, 2017.
Meybeck, M.: C, N, P and S in rivers: from sources to global inputs, in:
Interactions of C, N, P and S Biogeochemical Cycles and Global Change, edited
by: Wollast, R., Mackenzie, F. T., and Chou, L., Springer-Verlag, Berlin,
163–193, 1993.
Müller, D., Warneke, T., Rixen, T., Müller, M., Jamahari, S., Denis,
N., Mujahid, A., and Notholt, J.: Lateral carbon fluxes and CO2
outgassing from a tropical peat-draining river, Biogeosciences, 12,
5967–5979, https://doi.org/10.5194/bg-12-5967-2015, 2015.
Noacco, V., Wagener, T., Worrall, F., Burt, T. P., and Howden, N. J.: Human
impact on long-term organic carbon export to rivers, J. Geophys.
Res.-Biogeo., 122, 947–965, 2017.
Peierls, B. L. and Paerl, H. W.: Temperature, organic matter, and the control
of bacterioplankton in the Neuse River and Pamlico Sound estuarine system,
Aquat. Microb. Ecol., 60, 139–149, 2010.
Raich, J. W. and Potter, C. S.: Global patterns of carbon dioxide emissions
from soils, Global Biogeochem. Cy., 9, 23–36, 1995.
Ran, L. and Lu, X. X.: Delineation of reservoirs using remote sensing and
their storage estimate: an example of the Yellow River basin, China, Hydrol.
Process., 26, 1215–1229, 2012.
Ran, L., Lu., X. X., Xin, Z. B., and Yang, X.: Cumulative sediment trapping
by reservoirs in large river basins: A case study of the Yellow River basin,
Global Planet. Change, 100, 308–319, 2013.
Ran, L., Lu, X. X., Richey, J. E., Sun, H., Han, J., Yu, R., Liao, S., and
Yi, Q.: Long-term spatial and temporal variation of CO2 partial
pressure in the Yellow River, China, Biogeosciences, 12, 921–932,
https://doi.org/10.5194/bg-12-921-2015, 2015a.
Ran, L., Lu, X. X., Yang, H., Li, L., Yu, R., Sun, H., and Han, J.:
CO2 outgassing from the Yellow River network and its implications for
riverine carbon cycle, J. Geophys. Res.-Biogeo., 120, 1334–1347, 2015b.
Ran, L., Li, L., Tian, M., Yang, X., Yu, R., Zhao, J., Wang, L., and Lu, X.
X.: Riverine CO2 emissions in the Wuding River catchment on the Loess
Plateau: Environmental controls and dam impoundment impact, J. Geophys.
Res.-Biogeo., 122, 1439–1455, 2017.
Raymond, P. A. and Cole, J. J.: Increase in the export of alkalinity from
North America's largest river, Science, 301, 88–91, 2003.
Raymond, P. A., Hartmann, J., Lauerwald, R., Sobek, S., McDonald, C., Hoover,
M., Butman, D., Striegl, R., Mayorga, E., and Humborg, C.: Global carbon
dioxide emissions from inland waters, Nature, 503, 355–359, 2013.
Raymond, P. A., Saiers, J. E., and Sobczak, W. V.: Hydrological and
biogeochemical controls on watershed dissolved organic matter transport:
pulse-shunt concept, Ecology, 97, 5–16, 2016.
Regnier, P., Friedlingstein, P., Ciais, P., Mackenzie, F. T., Gruber, N.,
Janssens, I. A., Laruelle, G. G., Lauerwald, R., Luyssaert, S., and
Andersson, A. J.: Anthropogenic perturbation of the carbon fluxes from land
to ocean, Nat. Geosci., 6, 597–607, 2013.
Richey, J. E., Melack, J. M., Aufdenkampe, A. K., Ballester, V. M., and Hess,
L. L.: Outgassing from Amazonian rivers and wetlands as a large tropical
source of atmospheric CO2, Nature, 416, 617–620, 2002.
Robbins, L., Hansen, M., Kleypas, J., and Meylan, S.: CO2calc: A
user-friendly seawater carbon calculator for Windows, Mac OS X, and iOS
(iPhone), US Geological Survey Open File Report 2010–1280, 2010.
Shibata, H., Hiura, T., Tanaka, Y., Takagi, K., and Koike, T.: Carbon cycling
and budget in a forested basin of southwestern Hokkaido, northern Japan,
Ecol. Res., 20, 325–331, 2005.
Stimson, A., Allott, T., Boult, S., and Evans, M.: Fluvial organic carbon
composition and concentration variability within a peatland
catchment–implications for carbon cycling and water treatment, Hydrol.
Process., 31, 4183–4194, 2017.
Strahler, A. N.: Quantitative analysis of watershed geomorphology, EOS T. Am.
Geophys. Un., 38, 913–920, 1957.
Stuiver, M. and Polach, H. A.: Discussion reporting of 14C data,
Radiocarbon, 19, 355–363, 1977.
Tranvik, L. J., Downing, J. A., Cotner, J. B., Loiselle, S. A., Striegl, R.
G., Ballatore, T. J., Dillon, P., Finlay, K., Fortino, K., Knoll, L. B.,
Kortelainen, P. L., Kutser, T., Larsen, S., Laurion, I., Leech, D. M.,
McCallister, S. L., McKnight, D. M., Melack, J. M., Overholt, E., Porter, J.
A., Prairie, Y., Renwick, W. H., Roland, F., Sherman, B. S., Schindler, D.
W., Sobek, S., Tremblay, A., Vanni, M. J., Verschoor, A. M., von Wachenfeldt,
E., and Weyhenmeyer, G. A.: Lakes and reservoirs as regulators of carbon
cycling and climate, Limnol. Oceanogr., 54, 2298–2314, 2009.
Vita-Finzi, C. and Leaney, F.: The direct absorption method of 14C
assay – historical perspective and future potential, Quaternary Sci. Rev.,
25, 1073–1079, 2006.
Wallin, M. B., Grabs, T., Buffam, I., Laudon, H., Ågren, A., Öquist,
M. G., and Bishop, K.: Evasion of CO2 from streams–The dominant
component of the carbon export through the aquatic conduit in a boreal
landscape, Glob. Change Biol., 19, 785–797, 2013.
Wang, J., Cheng, F., Wang, Y., Chen, H., and Yu, Q.: Spatial-temporal changes
of land use in Wuding River Basin under ecological restoration, Bulletin of
Soil and Water Conservation, 34, 237–243, 2014 (in Chinese).
Wang, X., Ma, H., Li, R., Song, Z., and Wu, J.: Seasonal fluxes and source
variation of organic carbon transported by two major Chinese Rivers: The
Yellow River and Changjiang (Yangtze) River, Global Biogeochem. Cy., 26,
GB2025, https://doi.org/10.1029/2011gb004130, 2012.
Wang, Y., Fu, B., Chen, L., Lü, Y., and Gao, Y.: Check dam in the Loess
Plateau of China: engineering for environmental services and food security,
Environ. Sci. Technol., 45, 10298–10299, 2011.
Wang, Y., Fang, N., Tong, L., and Shi, Z.: Source identification and budget
evaluation of eroded organic carbon in an intensive agricultural catchment,
Agr. Ecosyst. Environ., 247, 290–297, 2017.
Wei, H., Chen, X., Xiao, G., Guenet, B., Vicca, S., and Shen, W.: Are
variations in heterotrophic soil respiration related to changes in substrate
availability and microbial biomass carbon in the subtropical forests?, Sci.
Rep., 5, 18370, https://doi.org/10.1038/srep18370, 2015.
Weiss, R. F.: Carbon dioxide in water and seawater: the solubility of a
non-ideal gas, Mar. Chem., 2, 203–215, 1974.
Xu, Y. D., Fu, B. J., and He, C. S.: Assessing the hydrological effect of the
check dams in the Loess Plateau, China, by model simulations, Hydrol. Earth
Syst. Sci., 17, 2185–2193, https://doi.org/10.5194/hess-17-2185-2013, 2013.
Zhang, F., Yao, S., Xue, B., Lu, X., and Gui, Z.: Organic carbon burial in
Chinese lakes over the past 150 years, Quaternary Int., 438, 94–103, 2017.
Zhang, H., Liu, S., Yuan, W., Dong, W., Xia, J., Cao, Y., and Jia, Y.: Loess
Plateau check dams can potentially sequester eroded soil organic carbon, J.
Geophys. Res.-Biogeo., 121, 1449–1455, 2016.
Zhang, J., Huang, W. W., Létolle, R., and Jusserand, C.: Major element
chemistry of the Huanghe (Yellow River), China: Weathering processes and
chemical fluxes, J. Hydrol., 168, 173–203, 1995.
Zhang, L. J., Wang, L., Cai, W.-J., Liu, D. M., and Yu, Z. G.: Impact of
human activities on organic carbon transport in the Yellow River,
Biogeosciences, 10, 2513–2524, https://doi.org/10.5194/bg-10-2513-2013,
2013.
Zheng, M., Cai, Q., and Cheng, Q.: Modelling the runoff-sediment yield
relationship using a proportional function in hilly areas of the Loess
Plateau, North China, Geomorphology, 93, 288–301, 2008.
Short summary
We systematically assessed the transport and fate of riverine carbon in the moderate-sized Wuding catchment on the Chinese Loess Plateau by constructing a riverine carbon budget and further relating it to terrestrial ecosystem productivity. The riverine carbon export accounted for 16 % of the catchment's net ecosystem production (NEP). It seems that a significant fraction of terrestrial NEP in this catchment is laterally transported from the terrestrial biosphere to the drainage network.
We systematically assessed the transport and fate of riverine carbon in the moderate-sized...
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