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Diet and locomotion, but not body size, differentiate mammal communities in worldwide tropical ecosystems

Lintulaakso, K.; Kovarovic, K.

Diet and locomotion, but not body size, differentiate mammal communities in worldwide tropical ecosystems Thumbnail


Authors

K. Lintulaakso



Abstract

Aim To test whether tropical habitat groups across the world can be differentiated by using taxon-free mammalian community structures and to discuss the implications of this analysis for palaeoecological community studies. Materials and methods We used mammalian community data for 169 localities, which were assigned a priori to hierarchical Olson (1983) vegetation categories. Species over 500 g were classified into dietary, locomotion, and body mass groups and the resulting group structures were analysed using community structure analyses (NPMANOVA, CAP, SIMPER). Results The test results show that the mammalian community structures are significantly different between all of Olson's categories. These differences are highest at Olson's major and minor ecosystem levels, and require the least number of variable categories. At the vegetation level, the number of variable categories required to distinguish between them becomes higher. Of the dietary groups, the number of frugivore–granivores, frugivore–omnivores, grazers and mixed feeders contribute most to these differences, while the number of arboreal, arboreal–terrestrial and subterranean–terrestrial species are the key locomotor groups. Body mass was not a good discriminator. Main conclusions As general ecosystem categories are broken down into more precisely defined habitats, it requires more detailed knowledge of the species adaptations to distinguish between them. Many of Olson's vegetation groups represent a continuum of cover that are, at least at the worldwide comparison, too detailed to differentiate when broad generalities are sought. We suggest using three worldwide tropical major ecosystems in mammalian community structure analyses: “Humid, closed forests”, “Seasonal or interrupted forests and grasslands”, and “Seasonal, open drylands”. Our results also demonstrate that community structures defined by both dietary and locomotor adaptations are powerful discriminators of tropical ecosystems and habitats across the continents we examined, but body mass should be interpreted with caution when the research question pertains to multiple continents.

Journal Article Type Article
Acceptance Date Apr 5, 2016
Online Publication Date Apr 13, 2016
Publication Date Jul 15, 2016
Deposit Date Jun 1, 2016
Publicly Available Date Apr 13, 2017
Journal Palaeogeography, Palaeoclimatology, Palaeoecology
Print ISSN 0031-0182
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 454
Pages 20-29
DOI https://doi.org/10.1016/j.palaeo.2016.04.012
Public URL https://durham-repository.worktribe.com/output/1403175

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