Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis

Understanding the structure and function of a lake’s ecosystem is the premise and foundation to implementing ecosystem-based management. However, evaluating the status of the ecosystem of a lake as a whole is still difficult when it comes to selecting indicators, determining standards, and interpret...

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Autores principales:	Yong Zeng, Yanwei Zhao, Zefeng Qi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ecosystem indices Ecological status Food web Lake Baiyangdian Ecopath with Ecosim Ecological Network Analysis Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/a98bc5ba21024875adc2a7a8e5dc9b5c
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spelling	oai:doaj.org-article:a98bc5ba21024875adc2a7a8e5dc9b5c2021-12-01T04:53:41ZEvaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis1470-160X10.1016/j.ecolind.2021.107788https://doaj.org/article/a98bc5ba21024875adc2a7a8e5dc9b5c2021-08-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21004532https://doaj.org/toc/1470-160XUnderstanding the structure and function of a lake’s ecosystem is the premise and foundation to implementing ecosystem-based management. However, evaluating the status of the ecosystem of a lake as a whole is still difficult when it comes to selecting indicators, determining standards, and interpretating results. In order to quantify the ecosystem status of Lake Baiyangdian (BYD), a holistic food web model was built using Ecopath with Ecosim. Eleven Ecological Network Analysis indicators classified into three categories (ecological function, ecological maturity, and food web structure) were selected according to their representativeness and availability. Based on the published literature on similar freshwater lakes or reservoirs in the world, quantile-based classification criteria are obtained. Furthermore, the Analytic Hierarchy Process was employed to assign the weight of an indicator according to its importance, sensitivity, and adaptability. An integrated evaluation framework was formed after synthesizing the evaluation value using a fuzzy comprehensive evaluation method. It was concluded that the ecological state of Lake BYD in 2009–2010 could be graded “Bad”, featuring a low-quality mature ecosystem, low trophic transfer efficiency, and linear, simple, and fragile connections between trophic levels. More specifically, the “Medium” grade detritivory:herbivory ratio (D:H), mean trophic level of the catch (MTLC), and “Bad” grade of transfer efficiency (TE) indicate that the composition of trophic species is unbalanced and the material and energy transfer is inefficient. “Good” grades of total primary production over biomass (TPP/TB), biomass over total system throughput ratio (TB/TST), and relative ascendency (A/C), together with “Median” grade of total primary production over total respiration ratio (TPP/TR), show characteristics of a mature ecosystem due to a high biomass of macrophytes, although here is a “low quality” in terms of exergy. In terms of the performance of the food web structure, all indicators achieve a “Bad” grade, suggesting a linear, simple, and fragile network. According to our modeling results, controlling the excessive macrophyte biomass, restoring fish biodiversity, and mitigating the pressures of overexploitation are suggested for the ecosystem-based management of BYD. This paper provides an integrated method to evaluate the ecological state of a shallow lake when its own reference state is unavailable.Yong ZengYanwei ZhaoZefeng QiElsevierarticleEcosystem indicesEcological statusFood webLake BaiyangdianEcopath with EcosimEcological Network AnalysisEcologyQH540-549.5ENEcological Indicators, Vol 127, Iss , Pp 107788- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ecosystem indices Ecological status Food web Lake Baiyangdian Ecopath with Ecosim Ecological Network Analysis Ecology QH540-549.5
spellingShingle	Ecosystem indices Ecological status Food web Lake Baiyangdian Ecopath with Ecosim Ecological Network Analysis Ecology QH540-549.5 Yong Zeng Yanwei Zhao Zefeng Qi Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
description	Understanding the structure and function of a lake’s ecosystem is the premise and foundation to implementing ecosystem-based management. However, evaluating the status of the ecosystem of a lake as a whole is still difficult when it comes to selecting indicators, determining standards, and interpretating results. In order to quantify the ecosystem status of Lake Baiyangdian (BYD), a holistic food web model was built using Ecopath with Ecosim. Eleven Ecological Network Analysis indicators classified into three categories (ecological function, ecological maturity, and food web structure) were selected according to their representativeness and availability. Based on the published literature on similar freshwater lakes or reservoirs in the world, quantile-based classification criteria are obtained. Furthermore, the Analytic Hierarchy Process was employed to assign the weight of an indicator according to its importance, sensitivity, and adaptability. An integrated evaluation framework was formed after synthesizing the evaluation value using a fuzzy comprehensive evaluation method. It was concluded that the ecological state of Lake BYD in 2009–2010 could be graded “Bad”, featuring a low-quality mature ecosystem, low trophic transfer efficiency, and linear, simple, and fragile connections between trophic levels. More specifically, the “Medium” grade detritivory:herbivory ratio (D:H), mean trophic level of the catch (MTLC), and “Bad” grade of transfer efficiency (TE) indicate that the composition of trophic species is unbalanced and the material and energy transfer is inefficient. “Good” grades of total primary production over biomass (TPP/TB), biomass over total system throughput ratio (TB/TST), and relative ascendency (A/C), together with “Median” grade of total primary production over total respiration ratio (TPP/TR), show characteristics of a mature ecosystem due to a high biomass of macrophytes, although here is a “low quality” in terms of exergy. In terms of the performance of the food web structure, all indicators achieve a “Bad” grade, suggesting a linear, simple, and fragile network. According to our modeling results, controlling the excessive macrophyte biomass, restoring fish biodiversity, and mitigating the pressures of overexploitation are suggested for the ecosystem-based management of BYD. This paper provides an integrated method to evaluate the ecological state of a shallow lake when its own reference state is unavailable.
format	article
author	Yong Zeng Yanwei Zhao Zefeng Qi
author_facet	Yong Zeng Yanwei Zhao Zefeng Qi
author_sort	Yong Zeng
title	Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
title_short	Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
title_full	Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
title_fullStr	Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
title_full_unstemmed	Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis
title_sort	evaluating the ecological state of chinese lake baiyangdian (byd) based on ecological network analysis
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a98bc5ba21024875adc2a7a8e5dc9b5c
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Evaluating the ecological state of Chinese Lake Baiyangdian (BYD) based on Ecological Network Analysis

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