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题名: Flow directionality, mountain barriers and functional traits determine diatom metacommunity structuring of high mountain streams
作者: Dong, Xiaoyu1, 2; Li, Bin1, 2; He, Fengzhi1, 2; Gu, Yuan1, 2; Sun, Meiqin1; Zhang, Haomiao1; Tan, Lu1; Xiao, Wen3, 4; Liu, Shuoran3, 4; Cai, Qinghua1, 4
刊名: SCIENTIFIC REPORTS
发表日期: 2016-04-19
DOI: 10.1038/srep24711
卷: 6
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: Stream metacommunities are structured by a combination of local (environmental filtering) and regional (dispersal) processes. The unique characters of high mountain streams could potentially determine metacommunity structuring, which is currently poorly understood. Aiming at understanding how these characters influenced metacommunity structuring, we explored the relative importance of local environmental conditions and various dispersal processes, including through geographical (overland), topographical (across mountain barriers) and network (along flow direction) pathways in shaping benthic diatom communities. From a trait perspective, diatoms were categorized into high-profile, low-profile and motile guild to examine the roles of functional traits. Our results indicated that both environmental filtering and dispersal processes influenced metacommunity structuring, with dispersal contributing more than environmental processes. Among the three pathways, stream corridors were primary pathway. Deconstructive analysis suggested different responses to environmental and spatial factors for each of three ecological guilds. However, regardless of traits, dispersal among streams was limited by mountain barriers, while dispersal along stream was promoted by rushing flow in high mountain stream. Our results highlighted that directional processes had prevailing effects on metacommunity structuring in high mountain streams. Flow directionality, mountain barriers and ecological guilds contributed to a better understanding of the roles that mountains played in structuring metacommunity.
关键词[WOS]: POPULATION GENETIC-STRUCTURE ; DISPERSAL LIMITATION ; ENVIRONMENTAL HETEROGENEITY ; LIMITED DISPERSAL ; AQUATIC INSECTS ; BENTHIC DIATOMS ; SPATIAL SCALES ; BETA DIVERSITY ; COMMUNITY ; ECOLOGY
语种: 英语
项目资助者: Major Science and Technology Program for Water Pollution Control and Treatment(2012ZX07501002-007)
WOS记录号: WOS:000374492000001
ISSN号: 2045-2322
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27964
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Dali Univ, Inst Eastern Himalaya Biodivers Res, Dali, Peoples R China
4.Collaborat Innovat Ctr Biodivers Three Parallel R, Dali, Peoples R China
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