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Coastal dunes of the southern North Sea as habitats of digger wasps
Haeseler, V. (1992). Coastal dunes of the southern North Sea as habitats of digger wasps, in: Carter, R.W.G. et al. (Ed.) Coastal dunes: geomorphology, ecology and management for conservation: Proceedings of the 3rd European Dune Congress Galway, Ireland, 17-21 June 1992. pp. 351-359
In: Carter, R.W.G.; Curtis, T.G.F.; Sheehy-Skeffington, M.J. (Ed.) (1992). Coastal dunes: Geomorphology, ecology and management for conservation: Proceedings of the 3rd European Dune Congress Galway, Ireland, 17-21 June 1992. A.A. Balkema [etc.]: Rotterdam. ISBN 90-5410-058-3. 533 pp., meer
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  • Haeseler, V.
Abstract
    On the East Frisian Islands 98 species (i.e. 58%) of the 169 digger wasp species known for northwest Germany were recorded between 1974 and 1990. With the exception of two to four (?) species all species on this island archipelago are autochthonous. In the coastal dunes, the occurrence of various ecological groups is proportionally similar to their presence on the mainland. The species spectrum of the relatively larger East Frisian islands varies from 69 species on Borkum to 43 on Baltrum. The islands Mellum and Memmert which are only 100 years old are colonized by 35 and 23 species, respectively. A few species known from northern Germany occur only on the East Frisian dune islands, while a number of other species find favourable living conditions not present on the north German plain. For this reason the dunes of the southern North Sea may be regarded as reserves especially suited for thermophile species of digger wasps nesting in the soil.
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