Volume 47, Issue 4 pp. 807-816
RESEARCH PAPER

Historical environmental stability drives discordant niche filling dynamics across phylogenetic scales

Brunno F. Oliveira

Corresponding Author

Brunno F. Oliveira

Department of Wildlife Ecology & Conservation, University of Florida/IFAS, Gainesville, FL, USA

Department of Biology and Environmental Sciences, Auburn University at Montgomery, Montgomery, AL, USA

Correspondence

Brunno F. Oliveira, Department of Wildlife Ecology & Conservation, University of Florida/IFAS, Gainesville, Florida, USA.

Email: [email protected]

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Jeffry M. Flenniken

Jeffry M. Flenniken

Department of Wildlife Ecology & Conservation, University of Florida/IFAS, Gainesville, FL, USA

Florida Museum of Natural History, University of Florida, Gainesville, FL, USA

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Robert P. Guralnick

Robert P. Guralnick

Florida Museum of Natural History, University of Florida, Gainesville, FL, USA

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Stephen E. Williams

Stephen E. Williams

Centre for Tropical Environmental & Sustainability Science, James Cook University, Townsville, Australia

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Brett R. Scheffers

Brett R. Scheffers

Department of Wildlife Ecology & Conservation, University of Florida/IFAS, Gainesville, FL, USA

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First published: 10 February 2020
Citations: 5
Brunno F. Oliveira and Jeffry M. Flenniken shared first authorship.
Handling Editor: David Chapple

Abstract

Aim

Regional diversity can increase owing to either the packing of species within regional niche space or the expansion of regional niche space. Yet, the primary factors dictating these dynamics remain poorly understood. Here, we assess the relative influence of current environmental conditions (net primary productivity, NPP) versus historic environmental stability over the Last Glacial Maximum on niche filling patterns of vertebrates (mammals, birds, amphibians and reptiles) in the Australian Wet Tropics (AWTs).

Location

Australian Wet Tropics.

Taxon

Vertebrates (mammals, birds, amphibians and reptiles).

Methods

We measured patterns of niche filling (niche packing vs. niche expansion) as the standardized departure of observed functional diversity (FD) from its null expectation. We fitted spatial models for vertebrates, and for each constituent class (mammals, birds, amphibians and reptiles) separately, to evaluate the relative effects of NPP and environmental stability on species richness and niche filling patterns.

Results

Historical environmental stability had a greater effect than NPP on species richness and niche filling patterns. However, the directionality of this effect depended on phylogenetic scale, with vertebrates exhibiting niche packing while each constituent class (except reptiles) exhibited niche expansion with increasing environmental stability.

Main Conclusion

Intra-class competition presumably leads to niche differentiation and expansion, whereas the overlap of functional traits among species from different classes leads to niche packing. That environmental stability over millennia is associated with an expanding niche space across multiple vertebrate classes suggests that the accumulation of FD within communities requires long recovery times.

CONFLICT OF INTERESTS

Authors declare no competing interests.

DATA AVAILABILITY STATEMENT

Species distribution and trait data are available from Williams et al. (2010), downloadable from https://doi.org/10.6084/m9.figshare.c.3303180.v1.

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