Spider communities in Indonesian cacao agroforestry [Elektronische Ressource] : diversity, web density and spatio-temporal turnover / vorgelegt von Kathrin Stenchly

Spider communities in Indonesian cacao agroforestry: diversity, web density and spatio-temporal turnover Dissertation Zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen Fakultät der Georg-August-Universität zu Göttingen vorgelegt von Kathrin Stenchly geboren in Borna Göttingen, Juni 2010 Referent: Prof. Dr. Teja Tscharntke Korreferent: Prof. Dr. Matthias Schaefer Tag der mündlichen Prüfung: 23.07.2010 2Index of Figures Figure 1 Map of the study area ………………..……………...………………………… 11 Figure 2.1 Exemplary web constructions of five spider web guilds…………………… 16 Figure 2.2 Variations in spider guild abundance among tree positions …...………….… 19 Figure 2.3 Impact of shade tree density and forest distance on two spider web guilds… 20 Figure 3.1 Brancheclector and pitfall trap…………..…………………………………... 30 Figure 3.2 DCA plot for litter, canopy and herb layer spider communities…………….. 32 Figure 3.3 Impact of litter and weed cover on spider abundance and species richness… 33 Figure 3.4 Responses of Oedignatha spadix and Artoria sp.1 on leaf litter density……. 33 Figure 3.5 Impact of forest distance on Trochosa ruricoloides and Thorelliola ensifera 34 Figure 4.1 Euclidean distance of weed diversity in relation to spatial species turnover... 44 Figure 4.2 Mean temporal species turnover of canopy and litter spider communities….. 45 Figure 4.