Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

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dc.contributor.author He, Siwen
dc.contributor.author Soininen, Janne
dc.contributor.author Chen, Kai
dc.contributor.author Wang, Beixin
dc.date.accessioned 2020-08-10T12:16:03Z
dc.date.available 2020-08-10T12:16:03Z
dc.date.issued 2020-05-19
dc.identifier.citation He , S , Soininen , J , Chen , K & Wang , B 2020 , ' Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China ' , Frontiers in Ecology and Evolution , vol. 8 , no. 141 , 141 . https://doi.org/10.3389/fevo.2020.00141
dc.identifier.other PURE: 142090412
dc.identifier.other PURE UUID: 52e04dec-2625-4bd2-85bb-32ce38f2cbd1
dc.identifier.other WOS: 000538430500001
dc.identifier.other ORCID: /0000-0002-8583-3137/work/78840989
dc.identifier.uri http://hdl.handle.net/10138/318240
dc.description.abstract Metacommunity theory provides a useful framework to describe the underlying factors (e.g., environmental and dispersal-related factors) influencing community structure. The strength of these factors may vary depending on the properties of the region studied (e.g., environmental heterogeneity and spatial location) and considered biological groups. Here, we examined environmental and dispersal-related controls of stream macroinvertebrates and diatoms in three regions in China using the distance-decay relationship analysis. We performed analyses for the whole stream network and separately for two stream network locations (headwater and downstream sites) to test the network position hypothesis (NPH), which states that the strength of environmental and dispersal-related controls varies between headwater and downstream communities. Community dissimilarities were significantly related to environmental distances, but not geographical distances. These results suggest that communities are structured strongly by environmental filtering, but weakly by dispersal-related factors such as dispersal limitation. More importantly, we found that, at the whole network scale, environmental control was the highest in the regions with highest environmental heterogeneity. Results further showed that the influence of environmental control was strong in both headwaters and downstream sites, whereas spatial control was generally weak in all sites. This suggests a lack of consistent support for the NPH in our studied stream networks. Moreover, we found that local-scale variables relative to basin-scale variables better explained community dissimilarities for diatoms than for macroinvertebrates. This indicates that diatoms and macroinvertebrates responded to environment at different scales. Collectively, these results suggest that the importance of drivers behind the metacommunity assembly varied among regions with different level of environmental heterogeneity and between organism groups, potentially indicating context dependency among stream systems and taxa. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Frontiers in Ecology and Evolution
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject environmental filtering
dc.subject distance-decay
dc.subject dispersal
dc.subject spatial scale
dc.subject environmental heterogeneity
dc.subject dendritic networks
dc.subject POSITION HYPOTHESIS
dc.subject BETA DIVERSITY
dc.subject METACOMMUNITIES
dc.subject MODE
dc.subject HETEROGENEITY
dc.subject LIMITATION
dc.subject TRAITS
dc.subject ROLES
dc.subject SIZE
dc.subject 1172 Environmental sciences
dc.title Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China en
dc.type Article
dc.contributor.organization Department of Geosciences and Geography
dc.contributor.organization Biosciences
dc.contributor.organization Helsinki Institute of Sustainability Science (HELSUS)
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.3389/fevo.2020.00141
dc.relation.issn 2296-701X
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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