Application of subfossil Bosmina and its δ13C values in tracing the long-term food web dynamics of shallow eutrophic lakes: A case in Taihu Lake, southeast China

Cheng, Longjuan; Kattel, Giri; Xue, Bin; Yao, Shuchun; Liu, Jinliang

doi:10.1016/j.scitotenv.2020.138909

Cited by 13 publications

(13 citation statements)

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“…2). Our sedimentary records agree with many previous eutrophication reconstructions from this lake area, for example, sediment phosphorus chemical fractions (Liu et al 2013), organic stable isotopes (δ 13 C, δ 15 N) (Wu et al 2007), diatoms (Dong et al 2008), and cladocera (Cheng et al 2020). Diatom‐inferred epilimnetic TP and sediment TP records can reasonably be used to reconstruct past lake water phosphorus concentration (Moyle and Boyle 2021), despite potential limitations necessitating caution in the application of these techniques (Juggins 2013).…”

Section: Resultssupporting

confidence: 90%

Synergistic impacts of nutrient enrichment and climate change on long‐term water quality and ecological dynamics in contrasting shallow‐lake zones

Zhang

McGowan

et al. 2021

Limnology & Oceanography

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Anthropogenic and climatic stressors on freshwater ecosystems are of global concern. However, the interactions and effects of multiple stressors (e.g., nutrient enrichment, climate warming, altered wind and precipitation) acting over different spatial and temporal scales are often complex and remain controversial. Here, we reconstructed one‐century dynamics of eutrophication and primary producer communities in algal‐dominated and macrophyte‐dominated zones of a large shallow lake (Taihu, China), by integrating sedimentary photosynthetic pigments and geochemical records with water monitoring and historical archives. We aimed to explore the long‐term underlying mechanisms of the responses of water quality and lake biota to multiple environmental perturbations. We found that water quality degradation and algal community modification showed similar trends but distinct timings and trajectories in contrasting ecological zones. Onset and intensity of eutrophication in north Meiliang Bay (since the 1950s) exceeded far beyond that of macrophyte‐dominated Eastern Taihu (~1990s). Anthropogenic nutrients overtook past climatic control on production and composition of phototrophic assemblages. More importantly, lake phytoplankton responded markedly to climate warming, decreasing wind speed, and extreme weathers after cultural eutrophication. Synergistic interactions of nutrients and climate on lake ecosystems became increasingly significant in promoting harmful algal blooms (HABs) dominated by Microcystis, close to the hyper‐eutrophic north lake zones. The asynchronous limnological and ecological responses also indicated the modulating roles of lake ecological regime and catchment hydrogeomorphic characteristic. Collectively, our findings suggest that mitigation of eutrophication and HABs calls for a triple management strategy integrating anthropogenic nutrients, climate change, and lake‐catchment setting.

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Section: Resultssupporting

confidence: 90%

Synergistic impacts of nutrient enrichment and climate change on long‐term water quality and ecological dynamics in contrasting shallow‐lake zones

Zhang

McGowan

et al. 2021

Limnology & Oceanography

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“…This may be due to the fact that the taxonomic impediment of identifying partially digested material by the gut content analysis can render some components unknown and classify them as detritus (Nielsen et al, 2018). Recently, stable carbon isotopes values of subfossils have been successfully tracked the food sources of consumers over a long-time scale (Cheng et al, 2020), which may provide an opportunity for temporal studies of highly resolved food webs. Consumers may change their dietary preferences to take advantage of multiple food sources based on the relative availability or nutritional quality of the resources (de Carvalho et al, 2019), and this may cause changes in their trophic positions and hence in the food web structure (Rooney and McCann, 2012;McMeans et al, 2019).…”

Section: Water Quality Factorsmentioning

confidence: 99%

Temporal changes of the food web structure and function driven by changes in hydrological regimes and water quality in a large shallow lake

Yang

Fu²,

Li³

et al. 2022

Front. Environ. Sci.

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Assessing food web structural properties and energy fluxes under changing hydrological regimes and water quality reveals the temporal patterns of ecosystem dynamics in shallow lakes. Here, we studied northern China’s largest shallow lake (Lake Baiyangdian) using quantitative food web models for five representative years (1958, 1980, 1993, 2009, and 2019). We analyzed the temporal patterns of food web structure and function by combining a Bayesian isotope mixing model with a food web energetics model. We further examined the temporal changes of unweighted and weighted food web topological attributes. Lake Baiyangdian changed from a detritus-based into a phytoplankton-based food web based on the relative contributions of basal food sources and energy flux distributions. The trophic position of fingerlings, large omnivorous fish, and carnivorous fish decreased with increasing eutrophication. The highest energy fluxes were from detritus to zooplankton and mollusks in 1958, from detritus and phytoplankton to zooplankton in 1980, 1993, and 2009, and from phytoplankton to zooplankton and detritus to mollusks in 2019. The highest total energy flux was in 1993, followed by 2019, with the lowest value in 1958. Unweighted food web metrics showed similar patterns. We observed more pronounced temporal variability in the node- and link-weighted food web metrics than in the unweighted metrics. In addition, hydrological factors (threshold, duration, reversals between high, and low water levels), eutrophication, and some water quality factors (chemical oxygen demand, dissolved oxygen, and pH) played important roles in the temporal changes of food web dynamics in Lake Baiyangdian. Our findings demonstrate the importance of integrating unweighted and weighted indicators to holistically comprehend how highly aggregated food webs respond to changing hydrological regimes and water quality, thereby improving management and restoration of shallow lake ecosystems.

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“…However, due to the destruction of Bosminidae chitin fossils in the process of deposition, it is difficult to distinguish all the specific species of Bosminidae. Recent studies showed that the total number of Bosminidae, including both the eutrophic species Bosmina longirostris and oligotrophic and mesotrophic species Bosmina (E.) longispina, shows clear survival advantages in lakes with high trophic levels (Cheng et al, 2019(Cheng et al, , 2020b. For example, a large number of Bosminidae (a relative abundance greater than 80% in the total concentration of Cladocera) have been found in shallow eutrophic lakes in the subtropical zone (Liu et al, 2008;Wang et al, 2019;Cheng et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies showed that the total number of Bosminidae, including both the eutrophic species Bosmina longirostris and oligotrophic and mesotrophic species Bosmina (E.) longispina, shows clear survival advantages in lakes with high trophic levels (Cheng et al, 2019(Cheng et al, , 2020b. For example, a large number of Bosminidae (a relative abundance greater than 80% in the total concentration of Cladocera) have been found in shallow eutrophic lakes in the subtropical zone (Liu et al, 2008;Wang et al, 2019;Cheng et al, 2020b). Furthermore, the abundance of Bosmina longirostris is usually greater than that of the species Bosmina (E.) longispina (Cheng et al, 2019(Cheng et al, , 2021 in eutrophic lakes.…”

Section: Introductionmentioning

confidence: 99%

Intensified sensitivity and adaptability of zooplankton Bosminidae in subtropical shallow freshwater lakes with increasing trophic level

et al. 2023

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The deterioration in lake water environments, especially increasing lake eutrophication, is prevalent all over the world, which has seriously affected the balance and stability of the internal ecosystem of lakes. In this study, modern water and sediment samples were collected from three subtropical freshwater lakes with significant differences in nutrient levels to analyze the concentration of the zooplankton Cladocera Bosminidae and its relationship with lakes’ ecological changes. The results show that the deterioration in lake water environments caused by increasing eutrophication limits the survival of most zooplankton. However, the Bosminidae shows a positive adaptability to eutrophication and high sensitivity to the changes in the lake environment. In addition, the lake eutrophication process caused by the intensification of human activities enhances the survival advantage of Bosminidae with more food sources, which is more conducive to its rapid reproduction.

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Application of subfossil Bosmina and its δ13C values in tracing the long-term food web dynamics of shallow eutrophic lakes: A case in Taihu Lake, southeast China

Cited by 13 publications

References 50 publications

Synergistic impacts of nutrient enrichment and climate change on long‐term water quality and ecological dynamics in contrasting shallow‐lake zones

Synergistic impacts of nutrient enrichment and climate change on long‐term water quality and ecological dynamics in contrasting shallow‐lake zones

Temporal changes of the food web structure and function driven by changes in hydrological regimes and water quality in a large shallow lake

Intensified sensitivity and adaptability of zooplankton Bosminidae in subtropical shallow freshwater lakes with increasing trophic level

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