@article {430,
	title = {Species pool structure determines the level of generalism of island parasitoid faunas},
	journal = {Journal of Biogeography},
	volume = {38},
	year = {2011},
	pages = {1657-1667},
	abstract = {Aim To examine whether island parasitoid faunas are biased towards generalists when compared with the mainland and their species pool, and to evaluate the effects of climate, island characteristics and regional factors on the relative proportions of idiobionts (i.e. generalists) and koinobionts (i.e. specialists) of two parasitic wasp families, Braconidae and Ichneumonidae. Location Seventy-three archipelagos distributed world-wide. Methods We used data on the distribution and biology obtained from a digital catalogue and several literature sources. We related level of generalism, measured as the ratio between the number of idiobiont and koinobiont species, to climatic, physiographic and regional factors using generalized linear models. We compared models by means of Akaike weighting, and evaluated the spatial structure of their residuals. We used partial regressions to determine whether the final models account for all latitudinal structure in the level of generalism. Results Islands host comparatively more idiobionts than continental areas. Although there is a latitudinal gradient in the level of generalism of island faunas correlating with both environmental factors and island characteristics, the most important determinant of island community structure is their source pool. This effect is stronger for ichneumonids, where generalism is higher in the Indomalayan region, arguably due to the higher diversity of endophytic hosts in its large rain forests.Main conclusions The level of generalism of island parasitoid faunas is largely constrained by regional factors, namely by the structure of the species pool, which emphasizes the importance of including regional processes in our understanding of the functioning of ecological communities. The fact that generalist species are more predominant in islands with a large cover of rain forests pinpoints the importance of the indirect effects of ecological requirements on community structure, highlighting the complex nature of geographical gradients of diversity.},
	keywords = {biogeography, community structure, ichneumonoidea, idiobionts, indomalayan region, island, koinobionts, latitudinal gradient, parasitoids, species pool},
	author = {Santos, Ana M C and Quicke, D.L.J. and Borges, P.A.V. and Hortal, Joaqu{\'\i}n}
}
@article {216,
	title = {Faunal composition of geometrid moths changes with altitude in an Andean montane rain forest},
	journal = {Journal of Biogeography},
	volume = {30},
	year = {2003},
	pages = {431-440},
	publisher = {Wiley Online Library},
	abstract = {Aim The objective of this study was to describe and interpret the changes in faunal composition in the moth family Geometridae (Lepidoptera) along a small-scale eleva- tional gradient in a tropical montane rain forest. This gradient was compared with a large-scale latitudinal gradient in Europe. Location Investigations were carried out in the province Zamora-Chinchipe in southern Ecuador along a gradient ranging from1040to2677 mabove sea level at twenty-two sites. Methods Moths were sampled with light-traps in three field periods in 1999 and 2000 and subsequently sorted and determined to species or morphospecies. Results We analysed 13,938 specimens representing 1010 species of geometrid moths. The proportional contribution of subtaxa to the local geometrid fauna changes along the elevational gradient at all systematic levels considered. While proportions of species of the subfamilies Ennominae, Sterrhinae and Geometrinae significantly decrease, the propor- tion of Larentiinae increases with increasing altitude. Changes also occur within the subfamilies Ennominae and Larentiinae. The host{\textendash}plant specialist ennomine tribes Cassymini, Macariini and Palyadini completely vanish, and the proportion of the tribe Boarmiini decreases at high altitudes. In contrast, the remaining tribes (mostly comprising polyphagous species) either do not show proportional changes (Azelinini, Nacophorini, Nephodiini, Ourapterygini) or even increase (Caberini, Cratoptera group). Within Lar- entiinae, the species proportion of the genus Eois decreases, whereas concomitantly the proportion of Eupithecia increases. There is a remarkable similarity between the altitu- dinal patterns in Ecuador and those found along the latitudinal gradient in Europe. Main conclusions Species of the subfamily Larentiinae seem to be particularly well- adapted to harsh environmental conditions, towards both high altitudes and latitudes. They might disproportionately profit from lower predation at higher altitudes. Many changes in the faunal composition can be explained by expected host{\textendash}plant requirements of the species involved. Our results show that diversity estimates based on taxon ratios which are assumed to be constant must be regarded with caution because such ratios can change rapidly along environmental gradients.},
	keywords = {biodiversity indicators, elevational gradient, Ennominae, geometridae, host{\textendash}plant specialists, indicator taxa, Larentiinae, latitudinal gradient, taxon ratios},
	author = {Brehm, Gunnar and Fiedler, K.}
}
