Ecological threshold of phosphorus load in Baiyangdian Lake based on a PCLake model and ecological network analysis

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 915, P. 170091 - 170091

Published: Jan. 15, 2024

Ecological thresholds are a useful indicator for implementing ecological management. Many studies determine the nutrient loads in lakes based on maximum allowable concentration of chlorophyll (Chla), although this neglects overall performance ecosystem. A PCLake model Baiyangdian (BYD) Lake northern China was constructed with six network analysis (ENA) indicators that characterized ecosystem function, system maturity, and food web structure to quantify status BYD To my knowledge, is first study level responses phosphorus load interference. Different scenarios were designed simulate Lake. The simulated results employed calculate ENA indicators. determined through driving response relationship between gradient show non-linear transition under gradient. As increases, D/H, SOI, FCI decreases while A/DC, TPP/TR, TPP/TB increases. This indicates function will deteriorate if 0.50-1.32 mg m

Language: Английский

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Estimation of Ecological Water Requirement and Water Replenishment Regulation of the Momoge Wetland

Water, Journal Year: 2025, Volume and Issue: 17(1), P. 114 - 114

Published: Jan. 3, 2025

Ensuring the ecological water requirements (EWR) suitable for wetlands are upheld is essential maintaining stability and health of their ecosystems, a challenge faced by globally. However, previous studies on EWRs estimation lack comprehensive consideration still suffer from problem rough time scales. Prior have predominantly concentrated its core buffer zones, neglecting analysis wetland’s entirety failing to account seasonal variations in EWRs. To fill this gap, we proposed novel framework estimating guide development dynamic replenishment strategies. The grey prediction model was used project wetland area under different scenarios designed We then applied key conservation China, Momoge Wetland, which currently facing issues areal shrinkage functional degradation due insufficient Our findings indicate that maximum, optimal, minimum Wetland 24.14 × 108 m3, 16.65 10.88 respectively. during overwintering, breeding, flood periods estimated at 1.92 5.39 8.73 Based predicted areas climatic conditions, necessary volumes dry-dry-dry, dry-dry-normal, dry-normal-dry, normal-normal-normal calculated be 0.70 0.49 0.68 0.36 In years characterized drought, current projects inadequate meet needs, highlighting urgent need implementation multi-source techniques enhance effectiveness these interventions. results study provide insights annual planning management with similar problems as Wetland. With new insights, our not only advances knowledge accuracy requirement assessment but also provides scalable solution global resource management, helping improve ecosystem’s adaptability future climate changes.

Language: Английский

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A novel approach to integrating the stability of river ecosystem and its driving factors

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 13

Published: March 4, 2025

Introduction In recent years, river ecosystem stability has been increasingly threatened by human activities and climate change. Comprehensive quantification of systematic analysis its response to change are essential for effective conservation management. Methods Thus, this study proposed a novel quantitative approach integrating the driving factors. The Han River Basin in China was selected as area due distinctive characteristics significant anthropogenic impact. Both external factors, including urbanization, dam construction, precipitation, internal such TP, DO, EC, were considered Results results revealed that compared upstream, resilience lower reaches decreased 35.75% resistance 8.2%, suggesting from upstream downstream. Urbanization had most negative impact on stability, followed precipitation construction. Among EC three main factors affecting increases these contributed positively enhancing stability. Discussion These findings highlight need targeted strategies mitigate human-induced disturbances enhance Based results, specific recommendations support watershed management ecological restoration, providing valuable insights sustainable conservation.

Language: Английский

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Effects of Multiple Environmental Stressors on Zoobenthos Communities in Shallow Lakes: Evidence from a Mesocosm Experiment

Animals, Journal Year: 2023, Volume and Issue: 13(23), P. 3722 - 3722

Published: Dec. 1, 2023

Multiple stressors, including climate change, eutrophication, and pesticide contamination, are significant drivers of the decline in lake zoobenthos. Zoobenthos play a crucial role aquatic ecosystems, impacting energy dynamics, nutrient cycling, sediment degradation. However, these stressors have led to decrease abundance diversity zoobenthos, resulting notable changes species composition structure. Eutrophication typically increases zoobenthos while reducing taxonomic diversity. Climate such as warming heatwaves, also affects community structure, with different exhibiting varying levels adaptability temperature changes. Additionally, pesticides like imidacloprid negative effects on survival growth interactions between other remain understudied. Here, we used 48 mesocosms (2500 L) simulate shallow lakes. We combined loading, sustained warming, test how interactively influence The experimental results demonstrate that elevated temperatures impact benthic organisms under treatment conditions. increase rise richness α-diversity, primarily attributed stimulation metabolic activities promoting their reproduction. This finding underscores potential change particularly terms its effect α-diversity. it is essential note reduced β-diversity among sites, implying trend toward homogenization communities warmer Moreover, this study revealed interactive multiple communities. Specifically, imidacloprid's not isolated but demonstrates complex within various interactions. In presence both elevation addition imidacloprid, appears counteract adverse elevation, increased when coincides input, significantly α-diversity negatively. These findings highlight complexity responses factors β-diversity. They provide valuable insights for further research conservation management ecosystems.

Language: Английский

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Optimizing nitrogen management for pollution control in Lake Baiyangdian following water replenishment

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 372, P. 123374 - 123374

Published: Nov. 24, 2024

Language: Английский

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