NDLI: The value of targeted reforestations for local insect diversity: a case study from the Ecuadorian Andes

Content Provider	Springer Nature Link
Author	Adams, Marc Oliver Fiedler, Konrad
Copyright Year	2015
Abstract	We surveyed insect communities (Coleoptera, Hemiptera, Lepidoptera) on native treelets (Cedrela montana, Heliocarpus americanus, Tabebuia chrysantha) planted among anthropogenic land cover types (pasture, secondary shrub, and a pine plantation), comparing them among one another and to those found on conspecific treelets in adjacent montane rainforest. Between 2010 and 2012, we sampled 160 treelets (Pasture: 47, Shrub: 26, Pine: 44, Forest: 43). Habitability of reforestations for forest insects was quantified by examining species richness, diversity partitioning and community composition on reforestations relative to natural forest. Species richness was high (phytophagous Coleoptera: 185 spp., predatory Coleoptera: 101 spp., phytoph. Hemiptera: 174 spp., phytoph. Lepidoptera: 147 spp.) with values being highest in natural forest, and significantly lower in all reforestations. Phytophagous Coleoptera and Lepidoptera communities showed a trend toward higher species richness in pine than in pasture or shrub. Predatory Coleoptera showed higher values in pasture and pine compared to shrub. These findings suggest that microclimatic effects of surrounding vegetation may affect species richness. Given high habitat heterogeneity and prevalence of rare species, tree-level α-diversity and turn-over between individual sample treelets emerged as the strongest contributors to overall diversity. Coleoptera community composition was mainly a function of habitat, but colonization of reforestations by forest species was restricted to phytophagous taxa and contingent on the presence of canopy cover. For Hemiptera and Lepidoptera, community composition was similar across habitats and determined mainly by host species. In summary, young reforestations maintain less diverse insect communities compared to natural forest but still harbor a considerable number of species, particularly if canopy cover is present.
Starting Page	2709
Ending Page	2734
Page Count	26
File Format	PDF
ISSN	09603115
Journal	Biodiversity and Conservation
Volume Number	24
Issue Number	11
e-ISSN	15729710
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Community composition Diversity partitioning Herbivorous insects Microclimate Species richness Evolutionary Biology Plant Sciences Tree Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation

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