NORTH-WESTERN JOURNAL OF ZOOLOGY 10 (1): 101-109 ©NwjZ, Oradea, Romania, 2014 Article No.: 131803 http://biozoojournals.ro/nwjz/index.html Assessing the effects of environmental factors on the presence and density of three shrike species in a continental and a coastal area of central Greece Athanassios I. SFOUGARIS*, Sofia G. PLEXIDA and Alexandra D. SOLOMOU Laboratory of Ecosystem and Biodiversity Management, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Fytokou str., Ν. Ionia, 384 46 Volos, Greece. E-mail’s:
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[email protected] *Corresponding author, A.I. Sfougaris, Tel / Fax: +30 2421093274, E-mail:
[email protected] Received: 20. January 2013 / Accepted: 09. July 2013 / Available online: 26. December 2013 / Printed: June 2014 Abstract. This study was conducted in two different Mediterranean areas of central Greece and aimed at (i) comparing the breeding density and frequency of occurrence of shrike species between these two areas, (ii) identifying the key characteristics of habitats for each species, and (iii) evaluating possible underlying environmental factors determining the shrike’s presence. To assess which factors mostly affect density, estimated with the point count method, we used the non-parametric test Kruskal - Wallis, Spearman's correlation coefficient, Canonical Analysis and Canonical Correspondence Analysis (CCA). Environmental variables tested were microclimate (air temperature and humidity), vegetation (herbaceous cover, shrub cover and shrub height), topography (altitude, slope, road presence, distance from nearest road, settlement and river) and habitat type (broad leaf forest, agricultural land, rangeland and abandoned olive groves). Between the two areas types, only Lanius senator mean breeding density was significantly different.