How does fish functional diversity respond to environmental changes in two large shallow lakes?
How does fish functional diversity respond to environmental changes in two large shallow lakes?
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两个大型浅水湖泊的鱼类功能多样性如何响应环境变化？
DOI：
10.1016/j.scitotenv.2020.142158
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发表时间：
2021-01
影响因子：
9.8
通讯作者：
Erik Jeppesen
中科院分区：
文献类型：
--
作者：
Zhigang Mao;Xiaohong Gu;Yong Cao;Juhua Luo;Qingfei Zeng;Huihui Chen;Erik Jeppesen
环境变化和人类活动对淡水生物多样性的威胁日益增加，凸显了了解生物群落与其环境之间联系的必要性。一个多世纪以来，物种丰富度一直主导着我们对生物多样性模式的看法，但人们越来越认识到，基于性状的生物多样性因果观点可能比物种丰富度或分类组成更有意义。这一基本原理引发了对功能多样性（FD）指数的探索，以量化调节物种对生态系统过程贡献的性状变化。在本研究中，我们利用长期监测数据集量化了中国两个不同干扰水平的大型浅水湖泊中鱼类群落的FD。应用随机森林回归来检查 FD 的变化如何与自然和人类相关的环境变量相关。鱼类放养、水质、气候和水文变化被认为是 FD 长期趋势最重要的预测因素。然而，两个湖泊FD的主要驱动因素不同，即人类活动在太湖中解释了更大比例的FD方差，而理化环境因素在呼伦湖中解释了FD方差。此外，FD指数似乎比物种丰富度对多种干扰更敏感，这表明功能性状可用于检测生态系统的变化。这项研究深入探讨了FD如何提高我们对鱼类群落与与湖泊和渔业管理相关的环境变化之间关联的理解。
Increasing threats to freshwater biodiversity from environmental changes and human activities highlight the need to understand the linkages between biological communities and their environment. Species richness has dominated our view of biodiversity patterns for over a century, but it is increasingly recognized that a trait-based, causal view of biodiversity may be more meaningful than species richness or taxonomic composition. This rationale has led to the exploration of functional diversity (FD) indices to quantify variation in traits that mediate species' contributions to ecosystem processes. In the present study, we quantified FD of fish communities in two large shallow lakes in China with different disturbances level using long-term monitoring data sets. Random-Forests regression was applied to examine how changes in FD were related to natural and human-related environmental variables. Fish stocking, water quality, climate, and hydrological changes were identified as the most important predictors of FD long-term trends. However, the major drivers of FD differed between two lakes, i.e., human activities explaining a greater proportion of FD variance in Lake Taihu, whereas physicochemical environmental factors prominently explained FD variance in Lake Hulun. Moreover, FD indices appeared more sensitive than species richness to multiple disturbances, suggesting that functional traits can be used to detect ecosystem alterations. This study offers insight into how FD can improve our understanding of the associations between fish communities and environmental changes of relevance also for lake and fisheries management.
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内蒙古呼伦湖介形类种群年龄结构的空间异质性及其意义
影响因子：
2.6
作者：
Zhai Dayou, Xiao Jule, Fan Jiawei, Zhou Lang, Wen
通讯作者：
Zhai Dayou, Xiao Jule, Fan Jiawei, Zhou Lang, Wen
影响因子：
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作者：
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A. Schwalb;T. Morris;N. Mandrak;K. Cottenie
DOI：
10.18307/2011.0621
发表时间：
2011
期刊：
Journal of Lake Sciences
影响因子：
--
作者：
毛志刚;谷孝鸿;曾庆飞;周露洪;孙明波
通讯作者：
毛志刚;谷孝鸿;曾庆飞;周露洪;孙明波
DOI：
10.1139/f2011-029
发表时间：
2011-06
期刊：
--
影响因子：
--
作者：
B. Neff;S. Garner;T. Pitcher
通讯作者：
B. Neff;S. Garner;T. Pitcher
DOI：
10.1890/09-1310.1
发表时间：
2010-09
期刊：
Ecological applications : a publication of the Ecological Society of America
影响因子：
--
作者：
S. Villéger;Julia Ramos Miranda;Domingo Flores Hernández;D. Mouillot
通讯作者：
S. Villéger;Julia Ramos Miranda;Domingo Flores Hernández;D. Mouillot