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Small field islands systems include a large proportion of the regional orthopteran species pool in arable landscapes

Riggi, Laura and Berggren, Åsa (2020). Small field islands systems include a large proportion of the regional orthopteran species pool in arable landscapes. Journal of Insect Conservation. 24 , 695-703
[Research article]

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The tendency of species richness to increase with patch area is one of the most robust empirical generalisations in ecology and its logic drives conservation actions. Indeed, preference is often given to conserving large, highly connected areas over small isolated patches. However, small habitats have been shown to be important biodiversity refuges in managed landscapes. Field islands are small remnants of natural habitat patches surrounded by cropland. While their island-like position in a species-poor crop field makes them potentially strategic habitats for biodiversity conservation, they have not received much attention in ecological studies. We investigated how local (i.e. field island area and habitat diversity) and landscape factors (i.e. proportion of arable land) affected orthopteran species richness, community mean dispersal and habitat specificity in 71 field islands in central Sweden. We found that despite low numbers of species per field island, due to their intrinsic small size, taken together, a system of small field island increased species richness and included a large proportion of the regional species pool in the arable landscape in central Sweden. Furthermore, we found that patch area and habitat diversity determined orthopteran community composition in field islands. More diverse and, to a lesser extent, larger field islands benefit sedentary and habitat specialist species. This study shows that more care should be taken to incorporate and potentially also prioritize small and permanent habitat patches in the management of agricultural landscapes. The protection of field islands with diverse habitats may be important for the maintenance of sedentary and specialist species.

Authors/Creators:Riggi, Laura and Berggren, Åsa
Title:Small field islands systems include a large proportion of the regional orthopteran species pool in arable landscapes
Series Name/Journal:Journal of Insect Conservation
Year of publishing :2020
Page range:695-703
Number of Pages:9
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Field island, Small natural features, Orthopteran, Conservation, Agricultural intensification
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Additional ID:
Type of IDID
Web of Science (WoS)000532213100001
ID Code:17270
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:19 Aug 2020 06:45
Metadata Last Modified:15 Jan 2021 19:45

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