Drivers of Spider (Arachnida:Araneae) Biodiversity in an ‘Olive Grove Ecosystem’ in North-Western Anatolia (Çanakkale and Balıkesir, Turkey)

Elverici, Mert
Karaçetin, Evrim
Bilgin, Cemal Can
Balkız, Özge
Demirbaş Çağlayan, Semiha
Vural, Mecit
Olive plantations cover vast areas on the Aegean coast of Turkey, and the southern foothills of Kaz Mountains is no exception. Olive trees dominate the terrestrial vegetation to such an extent that they form anovel ‘ecosystem’. The olive grove ecosystem is shaped by agricultural management, while impacts on biodiversity are largely unknown. We sampled spider communities living on soil surface and vegetation (understory herbaceous & tree canopy) microhabitats, alongside with various environmental variables linked to management or local habitat features in organic and conventional olive groves, as well as in relict patches of natural habitats, then used multivariate statistics to interpret associations within community composition (NMDS, CCA, RDA models) and compared diversity statistics (ANOVA, ANOSIM and permutation tests). 288 spider (morpho-) species of 14,252 adult specimens and >200 sampling units (plot based communities) were collected and standardized by sample coverage through rarefaction and extrapolation. Community composition differed by habitat type and by microhabitat. Olive groves and mixed forests had richer communities compared to maquis and pine stands. Soil surface was more species rich and diverse than vegetation. Difference between “organic” or “conventional” management types could not be distinguished well at the community level, whereas impact of soil management (tillage or herbicide use) and vegetation cover (tree/shrub vs. herb) were significant on the community. Our results may serve as evidence for a moderately strong species composition - environment relationship for spider communities.
5. Ecology and Evolutionary Biology Symposium, (18 - 20 Temmuz 2018)


Impact of olive grove management on spider (araneae) community in Northwestern Turkey
Elverici, Mert; Bilgin, Cemal Can; Department of Biology (2018)
Olive (Olea europea) plantations cover vast areas on the Aegean coast of Turkey, including the southern foothills of Kaz Mountains. In such environments, olive trees dominate the terrestrial vegetation in such a way that they might form a novel ‘ecosystem’. The ‘olive grove agro-ecosystem’ is shaped by agricultural management while impacts on biodiversity are largely unknown. As representatives of local biodiversity, spider communities were sampled in soil and vegetation microhabitats, alongside with variou...
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Protected Turkish areas in the Mediterranean region are compared with those of other Mediterranean countries. Policies followed in Turkey for conservation protection of the natural and cultural environment and the use of coastal resources for tourism are discussed. The purpose and application of Turkish law is examined with respect to the interaction between the protection of coastal areas and tourism. Modifications on the administrative and management regulations in Turkey enabling a better use of coastal ...
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Western Anatolia is one of the most important tectonic elements of Turkey, and constitutes the eastern margin of Aegean Extensional Province. The area is one of the most seismically active continental margins around the globe experiencing N-S extension. Earthquake data in this study is used to analyze the active stress patterns and to estimate the earthquake return periods for different sub-regions in western Anatolia. Focal mechanism solution data is used for determining the orientations and ratios of prin...
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Citation Formats
M. Elverici, E. Karaçetin, C. C. Bilgin, Ö. Balkız, S. Demirbaş Çağlayan, and M. Vural, “Drivers of Spider (Arachnida:Araneae) Biodiversity in an ‘Olive Grove Ecosystem’ in North-Western Anatolia (Çanakkale and Balıkesir, Turkey),” presented at the 5. Ecology and Evolutionary Biology Symposium, (18 - 20 Temmuz 2018), İzmir, Türkiye, 2018, Accessed: 00, 2021. [Online]. Available: