Functional diversity in a large river floodplain: anticipating the response of native and alien macroinvertebrates to the restoration of hydrological connectivity
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Published source details
Paillex A., Dolédec S., Castella E., Mérigoux S. & Aldridge D.C. (2013) Functional diversity in a large river floodplain: anticipating the response of native and alien macroinvertebrates to the restoration of hydrological connectivity. Journal of Applied Ecology, 50, 97-106.
Published source details Paillex A., Dolédec S., Castella E., Mérigoux S. & Aldridge D.C. (2013) Functional diversity in a large river floodplain: anticipating the response of native and alien macroinvertebrates to the restoration of hydrological connectivity. Journal of Applied Ecology, 50, 97-106.
Actions
This study is summarised as evidence for the following.
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Other biodiversity: Restore habitat along watercourses Action Link |
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Other biodiversity: Restore habitat along watercourses
A replicated, before-and-after study in 2003–2008 in 36 riparian sites in France found relatively more alien species, but fewer still-water species, after restoring river flow, compared to before. Invertebrates: Relatively more alien species were found after restoration, compared to before (4% vs 2% of functional diversity), but there were relatively fewer still-water (lentic) species (64% vs 72%) and similar numbers of flowing-water (lotic) species (31% vs 26%). Methods: There were three types of restoration: increasing flow (6 sites), dredging (6 sites), and reconnecting sites to the main river through dredging, (8 sites). Another sixteen sites had no restoration activities. Macroinvertebrates were sampled with four 0.25 x 0.25 m quadrats and nets (500 μm mesh) along a 30 m stretch in each site in spring and summer, one year before restoration and two years after.
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