NDLI: Patch isolation only matters for specialist butterflies but patch area affects both specialist and generalist species

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Patch isolation only matters for specialist butterflies but patch area affects both specialist and generalist species

Content Provider	Springer Nature Link
Author	Soga, Masashi Koike, Shinsuke
Copyright Year	2012
Abstract	Over the past four decades, many researchers have applied the theory of island biogeography (IBT) to predict and understand species loss and distribution in fragmented landscapes. Recent studies found that specialist species were more affected by fragment size and isolation than generalists. However, the mechanisms underlying different effects of area and isolation among specialists and generalists are unknown. We tested the predictions of IBT on butterfly assemblages in Tokyo, Japan, and hypothesized that the effects of fragment size and isolation would be stronger for specialists than for generalists. We classified butterfly species into specialists and generalists for each of two dimensions (food range and voltinism) and according to tolerance to the matrix. We recorded 26 feeding specialists and 27 generalists, 24 seasonal specialists and 29 generalists, 32 low matrix-tolerant species and 21 high matrix-tolerant species in 20 forest fragments. We used generalized linear models to relate the number of species in a fragment to fragment size and isolation (distance to the mainland). The averaged models based on AICc showed that fragment size had positive and significant effects on both specialist and generalist and high matrix-tolerant butterfly species richness. However, the negative effects of isolation on species richness were only found in specialist and low matrix-tolerant species. Our results demonstrate that patch isolation only affects specialist species. This suggests that when applying IBT to terrestrial fragmented landscapes, researchers should be careful not to overlook patch area and isolation effects on specialists.
Starting Page	270
Ending Page	278
Page Count	9
File Format	PDF
ISSN	13416979
Journal	Journal of Forest Research
Volume Number	18
Issue Number	3
e-ISSN	16107403
Language	English
Publisher	Springer Japan
Publisher Date	2012-05-08
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Butterfly assemblages Habitat fragmentation Island biogeography theory Landscape matrix Species–area relationship Forestry Forestry Management Tree Biology Plant Sciences Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Forestry

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