X X V I I I E u r o p e a n C o n g r e s s o f A r a c h n o l o g y – T o r i n o 2 0 1 4
17
Oral presentation Araneae Community ecology
Analysis and remarks on the phenology of forest spiders in Hesse, Central Germany (Arachnida, Araneae)
Blick T.
Senckenberg Research Institute, Zoological research in Hessian strict forest reserves, Frankfurt, Germany
A large dataset concerning forest spiders in Hesse facilitated analysis of the phenology of many trapped spider species. In five Strict Forest Reserves, 314 spider species based on 75.000 adult spiders were recorded by pitfalls and trunk eclectors (at about 1.8 meters height). Determinable juveniles are also included (e.g. Anyphaena accentuata or Amaurobius fenestralis). The traps were emptied monthly over two years in each reserve, with the exception of longer winter periods (due to snow cover). In each month more than 100 spider species were trapped in total, with the maximum in May and June (231 and 228 species), the minimum in November (126 species) and 171 species in the winter periods. The percentage of the total richness trapped in single months, as well as in different trapping periods, was analysed. Also at the level of single sites the months May and June are the most important, but even here less than 50% of the all-year-richness is regularly covered. More than 50 adults from 121 of the species were caught. Regarding these species, the monthly species numbers varied between 87 (Nov) and 113 (May). Clusters were made for the months and the species. The closest pairs were Sept/Oct and Nov/Dec – but both these pairs show the largest dissimilarity. Phenological data for the species were analysed and attempts were made to categorize them into types. The “classical” phenological types cannot be confirmed. The phenology of the species cannot be classified easily into types. Conclusion: It is necessary to trap over more than one – or even over a few months – in order to generate a representative image of the spider fauna of a forest site. This can also be expected for other habitat types.
Keywords: cluster, phenology per month, pitfall traps, trunk eclectors
ABSTRACT BOOK
Organized by
University of Turin
Department of Life Sciences and Systems Biology 24-29 August, 2014
Torino, Italy
X X V I I I E u r o p e a n C o n g r e s s o f A r a c h n o l o g y – T o r i n o 2 0 1 4
Organizing Committee
Marco Isaia Mauro Paschetta Alberto Chiarle Rocco Mussat Sartor Raquel Galindo Stefano Mammola
Department of Life Science and Systems Biology, University of Turin, Italy
Volunteers
Martina Dalle, Alberto Doretto, Elisa Falasco, Mauro Fanelli, Davide Giuliano, Jacopo Orlandini, Elena Piano Jr., Elena Piano Sr., Isidoro Riondato
Supporting Committee
Cristina Tuni
Bioscience Aarhus University, Denmark
Yuri M. Marusik
Department of Biocenology, Institute for biological problems of the North, Russia
Francesco Ballarin
Institute of Zoology, Chinese Academy of Sciences, China
Pavel E. Stoev Pensoft Publishers L.t.d.
National Museum of Natural History, Bulgaria Pelagosphera Coop. Soc.
www.pelagosphera.com
X X V I I I E u r o p e a n C o n g r e s s o f A r a c h n o l o g y – T o r i n o 2 0 1 4
Scientific Committee
Coordinators
Marco Isaia
University of Turin, Torino, Italy
Paolo Pantini
Museo Civico di Scienze Naturali Enrico Caffi, Bergamo, Italy
Members
Gustavo Hormiga
George Washington University, Washington D.C., USA
Miquel Arnedo
University of Barcelona, Barcelona, Spain
Yael Lubin
Jacob Blaustein Institute for Desert Research BGU, Israel
Wolfgang Nentwig University of Bern, Switzerland
Sara Goodacre
University of Nottingham, UK
Stano Pekár
Masaryk University in Brno, Czech Republic
Victor Fet
Marshall University, Huntington, USA
Axel Schönhofer
Johannes Gutenberg Universität Mainz, Germany
Honorary member Paolo Tongiorgi
University of Modena and Reggio Emilia, Italy
