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SUMMARY:To be connected or not? Floodplain restoration and aquatic diversi
 ty - Dr Amael Paillex\, Aquatic Ecology and Biology Lab\, University of Ge
 neva
DTSTART:20101119T130000Z
DTEND:20101119T140000Z
UID:TALK27492@talks.cam.ac.uk
CONTACT:Jonathan Green
DESCRIPTION:Hydrological connectivity plays a major role in shaping both t
 he habitat conditions and the biota in floodplain ecosystems. Current rest
 oration strategies in large river floodplains often focus on the increase 
 in lateral connectivity of secondary channels. However\, the knowledge on 
 the effect of restoration strategies on biodiversity remains limited. In t
 his study\, a framework was constructed to assess the level of lateral con
 nectivity in thirteen cut-off channels of two braided sectors of the Rhôn
 e River (France). The effect of restoration measures on macroinvertebrate 
 diversity was assessed. Changes were measured within (i.e. alpha diversity
 ) and between channels (i.e. beta diversity). The coherence of the relatio
 nships established for some of the richness and trait-based metrics demons
 trated their potential for the development of invertebrate-based tools to 
 predict and monitor river-floodplain changes associated with restoration. 
 At the channel scale\, an increase in lateral connectivity induced a signi
 ficant change in macroinvertebrate composition\, a decrease of total richn
 ess and functional diversity. It is recommended that floodplain-scale rest
 orations focus on diversification of the lateral hydrological connectivity
  of channels\, thereby\, conserving a maximum of biodiversity.
LOCATION:Part II Lecture Theatre\, Department of Zoology \, Downing Street
 \, CB2 3EJ
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