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Comparison of the canopy fauna of silver fir Abies alba and spruce trees Picea abies Vergleich der Kronenfauna von Tanne Abies alba und Fichte Picea abies


Comparison of the canopy fauna of silver fir Abies alba and spruce trees Picea abies Vergleich der Kronenfauna von Tanne Abies alba und Fichte Picea abies



Mitteilungen der Deutschen Gesellschaft fuer Allgemeine und Angewandte Entomologie. Juli; 15: 113-116



In the context of forest ecological support programs of silver fir as the "Tree of the year 2004", the relative contribution of fir and spruce trees to forest insect diversity is compared in present investigation. Previous studies had postulated a species poor community on fir. Insects were sampled by flight-interception traps at 6 different sites in Bavaria in the year 2004. Traps were installed in the centre of the canopy of a total of 30 trees (>100 years) of each species and emptied monthly from April through October. Specimens of Coleoptera, Hymenoptera, Heteroptera and Neuropterida were enumerated. A total of 20.562 specimens was collected, with Coleoptera being the dominant order. The comparison between fir and spruce revealed significant differences in numbers of specimens of Hymenoptera, Heteroptera and Neuropterida. Regarding saproxylic beetle species, a significant difference between fir and spruce was found at one site (Feuchtwangen) only. The Sorensen index values showed a strong similarity between the mountainous sites (Inzell, Reit im Winkel, Nationalpark Bayerischer Wald). Several species in the samples are listed in the German Red Data Book of endangered and threatened species. Most of these were sampled on fir, e.g. Episernus striatellus (RL-D 0) and Euglenes pygmaeus (RL-D 1).

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Related references

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