Agricultural practices, landscape analysis and invertebrate bioindicators in Plaine Mothaise valley (France) and Glan catchment (Austria)
2010 Agricultural practices, landscape analysis and invertebrate bioindicators in Plaine Mothaise valley (France) and Glan catchment (Austria). RAMIREZ REYES Carlos Daniel (Mexico) email@example.com
Organisation: University of Poitiers, Poitiers (FR) Supervisor : Catherine Souty-Grosset & Gaël Freyssinel
Summary: In Europe, during the last three centuries, the agricultural landscape has seen a reduction in formerly widespread traditional agroforestry. Agricultural intensification tends to decrease in most of the cases macro arthropod diversity measured across many different taxa. From a landscape perspective, riparian corridors can be viewed as mosaics of vegetation patches. The patches of vegetation in this agriculture landscape can provide refuge for several stages of development of different organisms. In this work an assessment of landscape composition was made and the degree of relationship between Isopoda and Coleoptera diversity and landscape heterogeneity was explored to predict both positive and negative effects on the growth potential of each taxa. The study sites were located in riparian adjacent agricultural landscapes in Plaine Mothaise, France and Glan catchment, Austria. Several indicators of landscape composition and structure were calculated for this purpose using field inspections. Terrestrial macro arthropods were sampled using pitfall traps. Special focus was made on terrestrial Isopoda and Coleoptera. Results show that the riparian vegetation and other connections elements on the landscape provide higher diversity of macro arthropods. Although human modifications of landscape have a negative effect on the diversity found on these fragmented landscapes still maintains Coleoptera and Isopoda diversity whether either forest or connections is present, allowing to maintain refugee for the organisms.