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The checklist contains records of spiders from the federal countries Schleswig-Holstein, Hamburg, Bremen and the northern plain of Lower Saxony which are compiled from published data, unpublished papers and personal communications. Among the total of 601 species Gnaphosa leporina, Marpissa nivoyi, Dictyna major, Baryphymamaritimum, Pelecopsisnemoraloides, Ozyptila westringi, Silometopus ambiguus and Micaria romana are species which occurin Germany mostlyin the north-western region. The species records in the checklist can be related to their informational sources and they can be localised in the TK25-grid, which represents sheets of the 1:25.000 topographical map.
A classification method for ascertaining characteristical spider communities of different biotope types is presented. Based on a current list of biotope types all data available from a certain area about the spatial distribution of spiders were fed into a data bank and analysed. A largely standardized method has been developed which allows to classify the spider community of each biotope type. The classification is based on a presence/absence matrix and a comparison between the grades of presence in different biotope types.