Quelle est la contribution des milieux semi-naturels - Les thèses en ...

Edge effects on ground beetles 7evolve. The physiognomy of the edges in the present study area,which were generally quite abrupt because of frequent managementoperations, could explain the absence of ground beetlespecies associated with edge habitats. As a consequence of thisabsence of edge-associated species and the presence of speciesfrom both adjacent habitats in the woodlot–open habitat edges,we found that the species assemblage of ground beetles in theedge zone constituted a transition between the assemblages ofwoodlots and open habitats.DEI on the species assemblage of ground beetlesin woodlotsQuantifying the DEI on ground beetles in forests and woodlotshas led to contrasting results being reported in the literature. Forground beetles, values explicitly reported in previous studies arein the range 5–22 m despite the fact that they rely on differenttrapping designs and concern very diverse ecological andbiogeographical contexts such as an agro-forested landscape inEngland (5 m; Bedford & Usher, 1994), boreal forest–clearcutboundaries (