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题名: Hydrologic connectivity driven natural stream fish assemblages in mountain streams in the Yangtze River basin: implications for stream fish conservation in monsoonal East Asia
作者: He, Dekui1; Kang, Zujie2; Tao, Juan1, 3, 4; Liu, Chunlong1, 3; Yang, Jian2; Chen, Yifeng1
关键词: The East Asian monsoon ; Immigration-extinction ; Connectivity ; Temporal variation ; Altitude ; Anthropogenic activities
刊名: HYDROBIOLOGIA
发表日期: 2017
DOI: 10.1007/s10750-016-2920-6
卷: 785, 期:1, 页:185-206
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
英文摘要: The East Asian monsoon and related seasonal rain belts are assumed to be significantly variable at intraseasonal, interannual, and interdecadal time scales, and largely determine the hydrology and ecological processes of the streams and rivers in this region. This study investigated the spatiotemporal variation in fish assemblages and the relative importance of local habitat and regional landscape variables in two protected streams in the middle Yangtze River basin. We hypothesized that the stream fish assemblages in this area are strongly influenced by the monsoon climate, and display a spatiotemporal variation in response to changes of stream flow regimes and physical habitats. The results show that species richness and abundance varied with both season and stream size. The distance to the downstream confluence site was the top important environmental factor, followed by altitude and downstream link. The results suggest that the fish assemblages within this protected watershed are mainly affected by regional landscape variables such as longitudinal position and stream position, but less by local habitat variables including water temperature and habitat types. The study highlights the importance of tributary connectivity and continuity to stream fish diversity in this area, indicating that restoration activities should preferentially recover the connectivity between upstream and downstream.
关键词[WOS]: CANONICAL CORRESPONDENCE-ANALYSIS ; SPECIES RICHNESS ; SPATIAL POSITION ; GREAT-PLAINS ; ENVIRONMENTAL-FACTORS ; TEMPORAL VARIABILITY ; LONGITUDINAL CHANGES ; HUMAN DISTURBANCES ; HABITAT VARIABLES ; LOCAL HABITAT
语种: 英语
项目资助者: NSFC(31572248) ; National Science and Technology Basic Special(2014FY210700 ; 2014FY210200)
WOS记录号: WOS:000388173000014
ISSN号: 0018-8158
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28682
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Donghu Nanlu 7, Wuhan 430072, Peoples R China
2.Management Bur Hunan Hupingshan Natl Nat Reserve, Shimen Cty 415319, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Griffith Univ, Australian Rivers Inst, Nathan, Qld 4111, Australia
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