Source and Biogeochemical Distribution of Organic Matter in Surface Sediment in the Deep Oligotrophic Lake Fuxian, China

Chen, Xiangchao; Feng, Ming; Fan, Ke; Pan, Jiawen; Fan, Fan; Wang, Yarui; Li, Wenchao

doi:10.1007/s10498-018-9330-5

Cited by 16 publications

(6 citation statements)

References 63 publications

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“…Based on the variations in carbon stable isotope, the contributions of different sources of OC in the water and sediment of lake ecosystems can be effectively tracked. At present, relatively accurate environmental data can be obtained using carbon stable isotopes, which have been widely used in the study of various types of lakes [42][43][44][45][46]. Stable isotope data analysis methods have also evolved and diversified over time as statistical methods have advanced.…”

Section: Carbon Stable Isotopementioning

confidence: 99%

Sources, Migration, Transformation, and Environmental Effects of Organic Carbon in Eutrophic Lakes: A Critical Review

Xie

et al. 2023

IJERPH

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Organic carbon (OC) plays a leading role in the carbon cycle of lakes and is crucial to carbon balances at regional and even global scales. In eutrophic lakes, in addition to external river inputs, the decomposition of endogenous grass and algae is a major source of organic carbon. Outbreaks of algal blooms (algal eutrophication) and the rapid growth of aquatic grasses (grass eutrophication) can lead to the accumulation and decay of large amounts of algae and aquatic grass debris, which increases the intensity of the carbon cycle of lakes and greatly impacts aquatic environments and ecosystems. The structures, decomposition processes, and distribution characteristics of algae and higher aquatic plant debris in eutrophic lakes are different from mesotrophic and oligotrophic lakes. Studying their accumulation dynamics and driving mechanisms is key to further understanding lake carbon cycles and their many interdependent pathways. This paper focuses on the carbon sources, tracing technologies, migration and transformation processes, and environmental effects of OC in eutrophic lakes. Based on the existing knowledge, we further combed the literature to identify the most important knowledge gaps preventing an in-depth understanding of the processes and driving mechanisms of the organic carbon cycle in eutrophic lakes.

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Section: Carbon Stable Isotopementioning

confidence: 99%

Sources, Migration, Transformation, and Environmental Effects of Organic Carbon in Eutrophic Lakes: A Critical Review

Xie

et al. 2023

IJERPH

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“…The newest Simmr package of stable isotope mixing models was implemented in the R program (Version: 4.0.3) to estimate the contribution of different sources of POC. of POC sources, the endmember values of C3 and C4 plants were set from references (Kendall et al, 2001;Wu et al, 2007;Jiang and Ji, 2013;Wang et al, 2014;Chen et al, 2018b;Deng et al, 2018;Xuan et al, 2019;Ru et al, 2020), and the endmember values of soil and plankton from the upper Yangtze River were sampled and analyzed in the field sampling campaign (Table 1). The 50% quantile values were the predicted values of the model.…”

Section: Application Of Stable Isotope Mixing Modelsmentioning

confidence: 99%

Section: Particulate Organic Matter and Stable Isotopic Signaturesmentioning

confidence: 99%

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

Zhang

et al. 2021

Preprint

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Abstract. Methane (CH4) emissions from freshwaters to the atmosphere have a profound impact on global atmospheric greenhouse gas (GHG) concentrations. Anthropogenic footprints such as dam construction and reservoir operation significantly changed the fate and transport of CH4 in freshwaters. The type of particulate organic carbon (POC) in reservoirs is a critical factor controlling CH4 production and emissions. However, little is known of how reservoir operation mediates the distribution of POC and regulates CH4 accumulation in cascade hydroelectric reservoirs. Here, spatial and temporal variations in POC and CH4 were explored in the Xiluodu (XLD) and Xiangjiaba (XJB) reservoirs which are deep valley dammed cascade reservoirs located in the main channel of the upper Yangtze River. Based on the δ13C-POC and N / C mole ratios of particulate organic matter, the results of multi-endmember stable isotope mixing models by a Bayesian model show that terrestrial POC and autochthonous POC accounted for approximately 56 ± 19 % and 42 ± 19 % (SD, n = 181) of POC, respectively. CH4 concentrations and δ13C-CH4 in the cascade reservoirs were potentially influenced by CH4 oxidation. Together with other physicochemical parameters and structural equation model, these results suggested that the input of terrestrial POC was dominantly influenced by water level variations and flow regulation due to reservoir operation. The cumulative effect of POC caused by cascade reservoirs was not apparent at a bimonthly scale. Terrestrial POC was more likely to dominate CH4 accumulation in cascade reservoirs under reservoir operation.

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“…The contributions of different endmembers to POC were calculated by the δ 13 C, δ 15 N and N/C molar ratios of particulate organic matter (POM). To estimate the contribution of POC sources, the endmember values of C3 and C4 plants were set from references (Kendall et al, 2001;Wu et al, 2007;Jiang and Ji, 2013;Wang et al, 2014;Chen et al, 2018b;Deng et al, 2018;Xuan et al, 2019;Ru et al, 2020), and the endmember values of soil and plankton from the upper Yangtze River were sampled and analyzed in the field sampling campaign (Table 1). The 50% quantile values were the predicted values of the model.…”

Section: Application Of Stable Isotope Mixing Modelsmentioning

confidence: 99%

“…POC can be divided into autochthonous and terrestrial POC. Autochthonous POC mostly originates from plankton, yet terrestrial POC derives from plants and soil in the catchment (Guillemette et al, 2013;Chen et al, 2018b;Tittel et al, 2019). The concentrations of autochthonous and terrestrial POC provided in the Supporting Information (Section S1.2, Figure S5) were estimated by the contributions of plankton, soil, C3 and C4 plants.…”

Section: Particulate Organic Matter and Stable Isotopic Signaturesmentioning

confidence: 99%

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2021

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Source and Biogeochemical Distribution of Organic Matter in Surface Sediment in the Deep Oligotrophic Lake Fuxian, China

Cited by 16 publications

References 63 publications

Sources, Migration, Transformation, and Environmental Effects of Organic Carbon in Eutrophic Lakes: A Critical Review

Sources, Migration, Transformation, and Environmental Effects of Organic Carbon in Eutrophic Lakes: A Critical Review

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

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