Response of snails and slugs to fragmentation of lowland forests in NW Germany
Kappes, H., Jordaens, K., Hendrickx, F., Maelfait, J.-P., Lens, L. & Backeljau, T.
Sold by ConchBooks, Harxheim, Germany
AbeBooks Seller since March 1, 2007
Sold by ConchBooks, Harxheim, Germany
AbeBooks Seller since March 1, 2007
Habitat fragmentation is a major cause for species loss, but its effect on invertebrates with low active dispersal power, like terrestrial gastropods, has rarely been studied. Such species can not cross a hostile habitat matrix, for which the predictions of island theory, such as positive relations between species richness and patch size, should apply. In order to test this prediction, we studied gastropod species diversity by assessing gastropod assemblage characteristics from 35 sites in 19 fragments of deciduous old-growth forests in the Lower Rhine Embayment, Germany. Assemblages differed between larger (?700 ha) and smaller forests (1,000 ha, i.e., well above the size of most fragments. In conclusion, the prediction is valid only for forest species. The response to fragmentation is species specific and seems to depend on habitat specialization and macroclimatic conditions. 13 pp., 4 figs, gr. 8.
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