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Seasonal changes in caddis larvae assemblages in river-floodplain habitats along a hydrological connectivity gradient
Van den Brink, F.W.B.; Van der Velde, G.; Wijnhoven, S. (2013). Seasonal changes in caddis larvae assemblages in river-floodplain habitats along a hydrological connectivity gradient. Hydrobiologia 716(1): 75-85. dx.doi.org/10.1007/s10750-013-1545-2
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Peer reviewed article  

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Trefwoord
Author keywords
    Biodiversity; Seasonality; Trichoptera; Connectivity gradient; Wetlands;Lower Rhine

Auteurs  Top 
  • Van den Brink, F.W.B.
  • Van der Velde, G., meer
  • Wijnhoven, S., meer

Abstract
    In order to assess the impact of seasonality versus connectivity on the ecological quality of the Lower Rhine river-floodplain habitats, we studied the seasonal variation in diversity and species assemblages of caddis larvae by monthly sampling of the littoral zone of four water bodies over a lateral connectivity gradient. Seasonal variation in diversity showed a general pattern in these floodplain habitats and could be related to caddisfly life history and habitat preferences. Despite this seasonal variation, caddis larvae species assemblages in the water bodies appeared to be rather stable and could be firmly related to the position of their habitats over the connectivity gradient. The main channel (lotic habitat) was clearly separated from the lentic water bodies, and also the sparsely vegetated water bodies from the well-vegetated water bodies. It is concluded that the impact of connectivity, and related parameters such as stream velocity and vegetation coverage, outweighed the impact of season on the caddis larvae assemblages.

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