Download Carabid Beetles in Their Environments: A Study on Habitat by Professor Dr. Hans-Ulrich Thiele (auth.) PDF

By Professor Dr. Hans-Ulrich Thiele (auth.)

With the expanding numbers of study employees and teams of investigators devoting themselves to the ecology of carabids I felt that the time had come to take inventory of the present wisdom during this box and to endeavour to weld my own effects and people of alternative employees right into a complete photo. It used to be with those goals in brain that the next learn was once conceived. yet another aim was once to aim to teach to what quantity learn on carabids can give a contribution to the bigger fields of analysis encompassing ecology, ethology and evolution. in my view the investigations on carabids let us to attract conclusions of basic applicability and, as such, similar with these made lately upon different teams of animals. i'm good conscious of the danger concerned these days in trying, on one's personal, to combine effects from a large choice of medical disciplines right into a significant complete, and accordingly i'm consistently thankful for corrections and for additional info. it truly is very unlikely for me to say by means of identify all the col­ leagues who've given me their aid within the coaching of the booklet. Reprints in their guides were positioned at my disposal by way of just about all of the authors brought up, in addition to via others whose names and works were passed over only with a view to hinder the publication from taking over encyclopedic professional­ parts. i'm however indebted to all of them for his or her cooperation.

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Additional resources for Carabid Beetles in Their Environments: A Study on Habitat Selection by Adaptations in Physiology and Behaviour

Sample text

Fine-grained sand therefore is a more suitable substrate for thermophilic organisms. Many psammophilic carabids, such as Harpalus and Dyschirius, are digging species. Krogerus is of the opinion that from this point of view as well, fine sand provides a better substrate for the typical sand species. He found a positive correlation between increasing fineness of sand-grain size and increasing population density in Dyschirius obscurus. The question was approached experimentally by Lindroth (1949; Fig.

Two-thirds, of the areas investigated: Pterostichus vulgaris, P. cupreus, Harpalus rufipes, H. aeneus, Agonum dorsa Ie, A. muelleri, Bembidion lampros and Trechus quadristriatus. ) A few species are found only in western Europe (Carabus auratus) or are more frequent only in arable fields of this region (Pterostichus niger, N ebria brevicollis). A larger number of species occurs either exclusively in eastern Europe or only there constitutes a considerable portion of the field fauna (see below). Table 9.

An extensive study, however, has been reported by larmer (1973) on moors and swamps bordering the old branches of the lower Rhine, and a reed swamp in Bohemia (Czechoslovakia) has been studied in some detail by Obrtel (1972). The dominant species of the eutrophic fens on the lower Rhine are Pterostichus nigrita and P. vernalis, together with other widely distributed species. Especially characteristic species among the subdominants and recedents were found to be Elaphrus cupreus, Agonum moestum, A.

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