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Dam Construction Impacts Fish Biodiversity in a Subtropical River Network, China

Liu, Xiongjun and Olden, Julian D. and Wu, Ruiwen and Ouyang, Shan and Wu, Xiaoping (2022). Dam Construction Impacts Fish Biodiversity in a Subtropical River Network, China. Diversity. 14 :6 , 476
[Research article]

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Abstract

Dams and diversions are a primary threat to freshwater fish biodiversity, including the loss of species and restructuring of communities, often resulting in taxonomic homogenization (increased similarity) over time. Mitigating these impacts requires a strong scientific understanding of both patterns and drivers of fish diversity. Here, we test whether different components of fish biodiversity have changed in response to major dam construction, and whether these patterns are predictable as a function of key environmental factors in the Gan River Basin, China. The results showed that total and native species alpha diversity have declined from the historical period (pre-dam) to the current period (post-dam). A total of 29 native species are lost, while 6 alien species were gained over time. We found evidence for fish faunal homogenization in the Gan River Basin, with a slight (1%) increase in taxonomic similarity among river basins from the historical period to the current period. Additionally, we revealed significant associations between drainage length, drainage area, and average air temperature, and alpha and beta fish diversity. This study provides new insight into the patterns and drivers of fish biodiversity change in the broader Yangtze River Basin and helps inform management efforts seeking to slow, and even reverse, current trajectories of biodiversity change.

Authors/Creators:Liu, Xiongjun and Olden, Julian D. and Wu, Ruiwen and Ouyang, Shan and Wu, Xiaoping
Title:Dam Construction Impacts Fish Biodiversity in a Subtropical River Network, China
Series Name/Journal:Diversity
Year of publishing :2022
Volume:14
Number:6
Article number:476
Number of Pages:13
Publisher:MDPI
ISSN:1424-2818
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Fish and Wildlife Management
Keywords:long-term biodiversity changes, biodiversity loss, regional homogenization, dams, river network
URN:NBN:urn:nbn:se:slu:epsilon-p-118288
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118288
Additional ID:
Type of IDID
DOI10.3390/d14060476
Web of Science (WoS)000818331500001
ID Code:28696
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:01 Sep 2022 07:29
Metadata Last Modified:01 Sep 2022 07:31

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