Beneficial Arthropods Respond Differentially to Wildflower Areas of Different Age
| Autor: | Irene Künzle, Mario Barone, Simone Aeschbacher, Corinne Mosimann, Thomas Frank, Christa Lethmayer |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Annales Zoologici Fennici. 46:465-480 |
| ISSN: | 1797-2450 0003-455X |
| DOI: | 10.5735/086.046.0607 |
| Popis: | We investigated the response of predatory spiders, carabids, staphylinids and heteropteran bugs to the age of wildflower areas at twenty 1- to 4-year-old wildflower sites and in wheat fields. Density, biomass and species richness of spiders, carabids and bugs increased with the age of wildflower sites, and were higher at older wildflower sites than in the wheat fields. In contrast, staphylinid density decreased significantly with the age of wildflower sites. Canonical correspondence analysis explained 42.4% and 46.7% of the total variance of spider and carabid assemblages, respectively. Spider and carabid assemblages were best explained by vegetation cover. Mean individual weights of spiders, carabids and staphylinids increased significantly with the age of wildflower sites. The positive response of these three groups of beneficials is of practical relevance because many farmers currently remove wildflower areas after two to three years of establishment. Thus, older stages of succession increase the numbe... |
| Databáze: | OpenAIRE |
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