Biodiversity and metacommunity structure of animals along tropical montane forest gradients

TitleBiodiversity and metacommunity structure of animals along tropical montane forest gradients
Publication TypeJournal Article
Year of Publication2016
AuthorsWillig, MR, Presley, SJ
JournalJournal of Tropical Ecology
Accession NumberLUQ.1270
KeywordsClementsian structure, conservation biology, ecotones, functional biodiversity, island biogeography, metacommunity structure, nestedness, phylogenetic biodiversity, taxonomic biodiversity, tropical animal ecology

The study of altitudinal gradients has made enduring contributions to the theoretical and empirical bases of modern biology. Unfortunately, the persistence of these systems and the species that compose them is threatened by land-use change at lower altitudes and by climate change throughout the gradients, but especially at higher altitudes. In this review, we focus on two broad themes that are inspired by altitudinal variation in tropical montane regions: (1) dimensions of biodiversity and (2) metacommunity structure. Species richness generally decreased with increasing altitude, although not always in a linear fashion. Mid-altitudinal peaks in richness were less common than monotonic declines, and altitudinal increases in richness were restricted to amphibian faunas. Moreover, gradients of biodiversity differed among dimensions (taxonomic, phylogenetic and functional) as well as among faunas (bats, rodents, birds) in the tropical Andes, suggesting that species richness is not a good surrogate for dimensions that reflect differences in the function or evolutionary history of species. Tropical montane metacommunities evinced a variety of structures, including nested (bats), Clementsian (rodents, bats, gastropods), quasi-Clementsian (reptiles, amphibians, passerines) and quasi-Gleasonian (gastropods) patterns. Nonetheless, composit