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@ARTICLE{VanLooy:829876,
author = {Van Looy, Kris and Piffady, Jérémy and Floury, Mathieu},
title = {{A}t what scale and extent environmental gradients and
climatic changes influence stream invertebrate communities?},
journal = {The science of the total environment},
volume = {580},
issn = {0048-9697},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2017-03492},
pages = {34 - 42},
year = {2017},
abstract = {In a context of increasing landscape modifications and
climatic changes, scale hierarchy becomes an ever more
crucial issue to integrate in the analysis of drivers and
stressors of biological communities, especially in river
networks. To cope with this issue, we developed (i) spatial
hierarchical models of functional diversity of stream
invertebrate communities to assess the relative influence of
local- vs. regional-scale factors in structuring community
assembly, and (ii) analysis of metacommunity elements to
determine the ecological processes behind the structuring.
The spatial structuring of benthic invertebrate communities
was investigated over 568 sites in South-eastern France.
Community structure was mainly driven by the altitudinal
gradient and spring flow variation at broad scales, with
functional diversity gradually decreasing with elevation and
being maximized at intermediate levels of flow variability.
According to the ‘elements of metacommunity structure’
analysis, the prevailing influence of the altitudinal
gradient was also supported by a Clementsian structuration
of invertebrate communities. Conversely, the influence of
observed climatic changes in temperature and rainfall was
weak and observed only at fine scales. As a result, natural
environmental filters were stronger drivers of the
functional diversity of communities than human-induced
stressors (e.g. water pollution and hydromorphological
alterations). More broadly, our results suggest that
management needs to embrace the possibilities of gathering
high spatial and taxonomical resolution data when analysing
and predicting flow variation and climate change effects in
order to preserve and restore functionally diverse
communities. Moreover, to develop environmental flow schemes
or restoration and climate change adaptation strategies for
freshwater communities, local and regional processes need to
be addressed simultaneously; equally responsible as drivers
of community diversity},
cin = {IBG-3},
ddc = {333.7},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000395353600005},
doi = {10.1016/j.scitotenv.2016.12.009},
url = {https://juser.fz-juelich.de/record/829876},
}