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The present study provides a robust data set for ecological planning and conservation of dry ecosystems in western Germany in general and North Rhine-Westphalia in particular. We summarised all available data from recent publications that dealt with spiders in dry ecosystems of North Rhine-Westphalia. Additionally, so far unpublished results of a detailed investigation regarding spiders in sand habitats of the Westphalian Bay that was conducted between 2006 and 2008 are presented. The analysis focussed on the habitat types according to Annex I of the EU Habitats Directive and related habitats. The investigation areas were scattered in the federal state of North Rhine-Westphalia. The data set comprised a total of 84436 individuals from 371 species and 28 families. Overall, an endangerment status is assigned to 68 species. Of these, 12 spiders are in imminent danger of becoming extinct. Two species, Erigonoplus globipes and Meioneta simplicitarsis, are believed to be extinct in North Rhine-Westphalia. Seven species (Dictyna major, Mastigusa arietina, Micaria formicaria, Styloctetor romanus, Thanatus striatus, Theridion uhligi and Xysticus ferrugineus) are new to the arachnofauna of North Rhine-Westphalia.
The present study summarises spider records from East Macedonia and Thrace (NE Greece). Spiders were mainly collected by hand sampling and to a smaller extent by pitfall trapping during field trips in 2002, 2004, 2007, 2008 and 2009. 171 species from 23 families were sampled. Pelecopsis pavida (O. P.-Cambridge, 1872) (Linyphiidae) and Xysticus kaznakovi Utochkin, 1968 (Thomisidae) were new to the European spider fauna and ten further species, Diaea livens Simon, 1876, Heriaeus graminicola (Doleschall, 1852), Meioneta ressli Wunderlich, 1973, Oedothorax retusus (Westring, 1851), Philodromus albidus Kulczynski, 1911, Pocadicnemis pumila Keyserling, 1880, Sitticus saltator (O. P.-Cambridge, 1868), Stemonyphantes lineatus (Linnaeus, 1758), Synageles scutiger Prószynski, 1979 and Thanatus coloradensis Keyserling, 1880, could be added to the Greek fauna for the first time. 21 and 38 species were new to East Macedonia and Thrace, respectively. Based on previous work, plus the present study, the Greek spider fauna now includes 1,108 species.
The present paper provides the first checklist of the spiders from coastal heathland on the Baltic Sea island of Hiddensee, Germany. A total of 171 species could be recovered by pitfall trapping in 2008 and 2009. The species inventory comprises several typical dune and heathland species. Ten species (Altella lucida, Centromerus capucinus, Dictyna latens, Drassodes cupreus, Hypsocephalus pusillus, Hypsosinga sanguinea, Micaria lenzi, Micrargus apertus, Philodromus histrio, Walckenaeria capito) are new to the arachnofauna of Mecklenburg-Western Pomerania.
Spider fauna of semi-dry grasslands on a military training base in Northwest Germany (Münster)
(2008)
The spider fauna of semi-dry grasslands on the military training area of Dorbaum near Münster (North Rhine-Westphalia) was investigated. From 2002 to 2003 a total of 11,194 mature spiders from 141 species and 20 families was caught by pitfall trapping and hand sampling. Among them are 18 species listed in the Red Data Book of North Rhine-Westphalia, four species are rare or previously rarely recorded. Most of the spiders are habitat generalists that extend their occurrence into all types of habitats, while the number of species which are stenotopic to sand habitats is noticeably low (n = 13). The spider data were analysed with Principal Component Analysis (PCA). It is possible to distinguish spider communities of neighbouring forested habitats from species groups of open habitats, but there is no uniform spider community which is characteristic for semi-dry grassland.