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Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths (Zygaena spp.)
Linköping University.
Swedish University of Agricultural Sciences; anterbury Christ Church UniversityCanterburyUK.
Linköping University.
Swedish University of Agricultural Sciences.
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2019 (English)In: Journal of Insect Conservation, ISSN 1366-638X, E-ISSN 1572-9753Article in journal (Refereed) Epub ahead of print
Abstract [en]

Burnet moths (Zygaena spp.) are day-flying Lepidoptera considered indicative of species-rich grasslands. In the present study, our aim was to clarify whether clear-cuts are habitat, supporting habitat or matrix for three species of Zygaena. We did so by sampling these species with sex pheromones on 48 clear-cuts, varying in amount of host and nectar plants, in southern Sweden. To compare the efficiency of such sampling, we also conducted transect walks on these clearcuts. Overall, host-plants on clear-cuts best explained the abundance of Zygaena spp. recorded, better than nectar-plants or connectivity with nearby grasslands. These results indicate that clear-cuts with an abundance of host plants are used as a fully functional habitat, and not a supporting habitat in the sense of only providing nectar. There is no support in these results for considering clear-cuts as an inert matrix. With about half the work-effort, pheromone traps recorded 100 times more Zygaena spp. as transect walks. The poor correspondence between observations during transects walks and pheromone trap catches suggest Zygaena spp. being difficult to monitor by transect walks. In contrast to grasslands, clear-cuts are short-term in nature requiring repeated recolonization, indicating the importance of permanent grasslands. However, clear-cuts are important temporary insect habitats due to their great acreage, and suitable management can increase the time they remain a habitat.

Place, publisher, year, edition, pages
2019.
Keywords [en]
Clear-cut, Day-flying moth, Forestry, Landscape, Zygaena
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:hig:diva-31173DOI: 10.1007/s10841-019-00193-3Scopus ID: 2-s2.0-85075365454OAI: oai:DiVA.org:hig-31173DiVA, id: diva2:1375009
Available from: 2019-12-03 Created: 2019-12-03 Last updated: 2019-12-03Bibliographically approved

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Ryrholm, Nils

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