Abstract
During a period of three years (1971–1973) ca. 180,000 insect imagines (only Pterygota) were caught by means of „groundphoto-eclectors“ in two spruce stands (F1 ca. 90 years old; F3 ca. 45 years old) in the Solling. The catch results are indicative of „emergence abundance“ and „activity density in enclosed rooms“. In the investigation period c. 2700 – 4300 ind./m2 × year of insect imagines were caught in the two areas. The „production of imagines“ (biomass-sum of imagines emerging from soil) varied from 5,2–14,3 kg dry weight/ha × year (immigrant-populations included). Assuming a calorific value of 5,5 cal/mg dry weight this means a production of imagines between 29 × 103 and 79 × 103 kcal/ha × year. Every year c. 53–67% of the determined production of imagines fell to the populations of only 4–6 species. On the assumption that the energy turnover of the total of insect populations (Pterygota) is by one decimal exponent higher than the production of imagines, the studied partial zoocoenosis has an energy turnover of 290–630 × 103 kcal/ha × year in F1 (without the portion of the immigrant Xyloterus domesticus) and 340–610 × 103 kcal/ ha × year in F3.
Ergebnisse des Solling-Projekts der DFG (IBP), Mitteilung Nr. 196.
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© 1977 Dr W. Junk bv Publishers The Hague
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Thiede, U. (1977). Quantitative Untersuchungen an Insektenpopulationen in Fichtenforsten des Solling. In: Müller, P. (eds) Verhandlungen der Gesellschaft für Ökologie, Göttingen 1976. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5957-9_14
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DOI: https://doi.org/10.1007/978-94-011-5957-9_14
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