Seasonal variability in the response of ground beetles (Coleoptera: Carabidae) to a forest edge in a heterogeneous agricultural landscape in Japan

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Abstract

Understanding arthropod responses to forest edges is essential to<br />understanding both the characteristics of agro-ecosystems and the<br />potential ecosystem services provided by forests adjacent to farmland in<br />heterogeneous agricultural landscapes. Seasonal difference in the<br />responses of carabid beetles to forest edges was determined using<br />transects that extended from the edge of the forest 22.5 m into the<br />interior of a forest and 22.5 m into the meadow in three seasons, early<br />summer, late summer and mid-autumn. The responses of carabids to the<br />forest edge in terms of species richness and abundance differed<br />significantly in the three seasons. The species richness and abundance<br />peaked in the meadow 4.5 m from the edge and were low in the forest in<br />summer, whereas they peaked at the edge and remained high in the forest<br />in autumn. Species-level analyses revealed that several species did not<br />move between habitats, indicating that the forest edge acted as a<br />barrier for these species. Many species, however, peaked in the meadow<br />near the edge and the distribution of one species along the<br />meadow-forest transect changed with the seasons. Our results indicate<br />that secondary forests are not an effective sources of predators of<br />pests, but do function as overwintering sites for some species. Because<br />many species that prefer open land hibernate in field boundaries and<br />fallow fields, the quality and spatial configuration of these habitats<br />is important. Furthermore, in terms of pest management the seasonal<br />dynamics of not only carabid beetles but other beneficial arthropods<br />such as spiders and parasitoids should be considered.

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Ohwaki, A., Kaneko, Y., & Ikeda, H. (2015). Seasonal variability in the response of ground beetles (Coleoptera: Carabidae) to a forest edge in a heterogeneous agricultural landscape in Japan. European Journal of Entomology, 112(1), 135–144. https://doi.org/10.14411/eje.2015.022

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