Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths (Zygaena spp.)

Journal article


Bergman, K., Burman, J., Jonason, D., Larsson, M., Ryrholm, N, Westerberg, L. and Milberg, P. 2019. Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths (Zygaena spp.). Journal of Insect Conservation. https://doi.org/10.1007/s10841-019-00193-3
AuthorsBergman, K., Burman, J., Jonason, D., Larsson, M., Ryrholm, N, Westerberg, L. and Milberg, P.
Abstract

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.

KeywordsClear-cut ; Day-flying moth; Forestry; Landscape; Zygaena
Year2019
JournalJournal of Insect Conservation
PublisherSpringer
ISSN1366-638X
1572-9753
Digital Object Identifier (DOI)https://doi.org/10.1007/s10841-019-00193-3
Official URLhttps://doi.org/10.1007/s10841-019-00193-3
Related URLhttps://link.springer.com/
Publication dates
Print16 Nov 2019
Publication process dates
Accepted11 Nov 2019
Deposited13 Dec 2019
Accepted author manuscript
License
File Access Level
Open
Output statusPublished
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