Body size, reef area and temperature predict global reef-fish species richness across spatial scales

Barneche, D.R., Rezende, E.L., Parravicini, V., Maire, E., Edgar, G.J., Stuart-Smith, R.D., Arias-González, J.E., Ferreira, C.E.L., Friedlander, A.M., Green, A.L., Luiz, O.J., Rodríguez-Zaragoza, F.A., Vigliola, L., Kulbicki, M., and Floeter, S.R. (2019) Body size, reef area and temperature predict global reef-fish species richness across spatial scales. Global Ecology and Biogeography, 28 (3). pp. 315-327.

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Aim: To investigate biotic and abiotic correlates of reef-fish species richness across multiple spatial scales.

Location: Tropical reefs around the globe, including 485 sites in 109 sub-provinces spread across 14 biogeographic provinces.

Time period: Present.

Major taxa studied: 2,523 species of reef fish.

Methods: We compiled a database encompassing 13,050 visual transects. We used hierarchical linear Bayesian models to investigate whether fish body size, reef area, isolation, temperature, and anthropogenic impacts correlate with reef-fish species richness at each spatial scale (i.e., sites, sub-provinces, provinces). Richness was estimated using coverage-based rarefaction. We also tested whether species packing (i.e., transect-level species richness/m²) is correlated with province-level richness. Results Body size had the strongest effect on species richness across all three spatial scales. Reef area and temperature were both positively correlated with richness at all spatial scales. At the site scale only, richness decreased with reef isolation. Species richness was not correlated with proxies of human impacts. Species packing was correlated with species richness at the province level following a sub-linear power function. Province-level differences in species richness were also mirrored by patterns of body size distribution at the site scale. Species-rich provinces exhibited heterogeneous assemblages of small-bodied species with small range sizes, whereas species-poor provinces encompassed homogeneous assemblages composed by larger species with greater dispersal capacity.

Main conclusions: Our findings suggest that body size distribution, reef area and temperature are major predictors of species richness and accumulation across scales, consistent with recent theories linking home range to species-area relationships as well as metabolic effects on speciation rates. Based on our results, we hypothesize that in less diverse areas, species are larger and likely more dispersive, leading to larger range sizes and less turnover between sites. Our results indicate that changes in province-level (i.e., regional) richness should leave a tractable fingerprint in local assemblages, and that detailed studies on local-scale assemblage composition may be informative of responses occurring at larger scales.

Item ID: 57247
Item Type: Article (Research - C1)
ISSN: 1466-8238
Keywords: biogeography, community assembly, local diversity, neutral theory, regional diversity, spatial scale, species energy
Copyright Information: © 2018 John Wiley & Sons Ltd.
Funders: French Foundation for Research on Biodiversity (FRB), Center of Synthesis and Analysis of Biodiversity (CESAB), Bolsa Jovem Talento (CNPq 402053/2012‐5) (BJT), Fondo de Ciencias y Tecnología, Chile (FCT), SISBIOTA‐Mar, Pro‐Africa (PA), CAPES, Marinha do Brasil, Instituto Laje Viva, Institut de Recherche pour le Développement (IRD), CONABIO, PROMEP, SEP‐CONACYT, WWF‐CA, Fundación Cayo Cochinos, USAID, FFEM, Universidad de Guadalajara, INPESCA, National Geographic Society
Projects and Grants: FRB & CESAB, GASPAR working group, BJT grant FB002 for the Center for Applied Ecology and Sustainability,, FCT FONDECYT 1170017, SISBIOTA CNPq 563276/2010‐0 & FAPESC 6308/2011‐8, PA CNPq 490531/2007‐5, IRD PRISTINE project (Fondation Total), CONABIO L. E. Calderón‐Aguilera project HJ026, PROMEP projects 103.5/08/2919 and 103.5/10/927
Date Deposited: 27 Feb 2019 07:44
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960305 Ecosystem Adaptation to Climate Change @ 100%
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