The global biogeography of lizard functional groups

Vidan, E., Novosolov, M., Bauer, A., Castro, F., Chirio, L., Nogueira, C., Doan, T., Lewin, A., Meirte, D., Nagy, Z., Pincheira-Donoso, D. ORCID: 0000-0002-0050-6410, Tallowin, O., Torres-Carvajal, O., Uetz, P., Wagner, P., Wang, Y., Belmaker, J. and Meiri, S., 2019. The global biogeography of lizard functional groups. Journal of Biogeography. ISSN 0305-0270

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Abstract

Aim: Understanding the mechanisms determining species richness is a primary goal of biogeography. Richness patterns of sub-groups within a taxon are usually assumed to be driven by similar processes. However, if richness of distinct ecological strategies respond differently to the same processes, inferences made for an entire taxon may be misleading. We deconstruct the global lizard assemblage into functional groups and examine the congruence among richness patterns between them. We further examine the species richness – functional richness relationship to elucidate the way functional diversity contributes to the overall species richness patterns.

Location: Global.
Methods: Using comprehensive biological trait databases we classified the global lizard assemblage into ecological strategies based on body size, diet, activity times and microhabitat preferences, using Archetypal Analysis. We then examined spatial gradients in the richness of each strategy at the one-degree grid cell, biomes and realm scales.

Results: We found that lizards can best be characterized by seven 'ecological strategies': scansorial, terrestrial, nocturnal, herbivorous, fossorial, large and semiaquatic. There are large differences among the global richness patterns of these strategies. While the major richness hotspot for lizards in general is in Australia, several strategies exhibit highest richness in the Amazon Basin. Importantly, the global maximum in lizard species richness is achieved at intermediate values of functional diversity and increasing functional diversity further result in a shallow decline of species richness.

Main conclusions: The deconstruction of the global lizard assemblage along multiple ecological axes offers a new way to conceive lizard diversity patterns. It suggests that local lizard richness mostly increases when species belonging to particular ecological strategies become hyper-diverse there, and not because more ecological types are present in the most species rich localities. Thus maximum richness and maximum ecological diversity do not overlap. These results shed light on the global richness pattern of lizards, and highlight previously unidentified spatial patterns in understudied functional groups.

Item Type: Journal article
Alternative Title: Lizard functional groups [running title]
Publication Title: Journal of Biogeography
Creators: Vidan, E., Novosolov, M., Bauer, A., Castro, F., Chirio, L., Nogueira, C., Doan, T., Lewin, A., Meirte, D., Nagy, Z., Pincheira-Donoso, D., Tallowin, O., Torres-Carvajal, O., Uetz, P., Wagner, P., Wang, Y., Belmaker, J. and Meiri, S.
Publisher: Wiley-Blackwell
Date: 19 July 2019
ISSN: 0305-0270
Identifiers:
NumberType
10.1111/jbi.13667DOI
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 12 Jun 2019 15:47
Last Modified: 19 Jul 2020 03:00
URI: http://irep.ntu.ac.uk/id/eprint/36744

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