Sebastian-Gonzales et al. 2019 - Global Change Biology.pdf (1.27 MB)
0/0

Scavenging in the Anthropocene: Human impact drives vertebrate scavenger species richness at a global scale

Download (1.27 MB)
journal contribution
posted on 11.06.2020 by E Sebastián-González, JM Barbosa, JM Pérez-García, Z Morales-Reyes, F Botella, PP Olea, P Mateo-Tomás, M Moleón, F Hiraldo, E Arrondo, JA Donázar, A Cortés-Avizanda, N Selva, SA Lambertucci, A Bhattacharjee, A Brewer, JD Anadón, E Abernethy, OE Rhodes, K Turner, JC Beasley, TL DeVault, A Ordiz, C Wikenros, B Zimmermann, P Wabakken, CC Wilmers, JA Smith, CJ Kendall, D Ogada, ER Buechley, E Frehner, ML Allen, Heiko Wittmer, JRA Butler, JT du Toit, J Read, D Wilson, K Jerina, M Krofel, R Kostecke, R Inger, A Samson, L Naves-Alegre, JA Sánchez-Zapata
© 2019 John Wiley & Sons Ltd Understanding the distribution of biodiversity across the Earth is one of the most challenging questions in biology. Much research has been directed at explaining the species latitudinal pattern showing that communities are richer in tropical areas; however, despite decades of research, a general consensus has not yet emerged. In addition, global biodiversity patterns are being rapidly altered by human activities. Here, we aim to describe large-scale patterns of species richness and diversity in terrestrial vertebrate scavenger (carrion-consuming) assemblages, which provide key ecosystem functions and services. We used a worldwide dataset comprising 43 sites, where vertebrate scavenger assemblages were identified using 2,485 carcasses monitored between 1991 and 2018. First, we evaluated how scavenger richness (number of species) and diversity (Shannon diversity index) varied among seasons (cold vs. warm, wet vs. dry). Then, we studied the potential effects of human impact and a set of macroecological variables related to climatic conditions on the scavenger assemblages. Vertebrate scavenger richness ranged from species-poor to species rich assemblages (4–30 species). Both scavenger richness and diversity also showed some seasonal variation. However, in general, climatic variables did not drive latitudinal patterns, as scavenger richness and diversity were not affected by temperature or rainfall. Rainfall seasonality slightly increased the number of species in the community, but its effect was weak. Instead, the human impact index included in our study was the main predictor of scavenger richness. Scavenger assemblages in highly human-impacted areas sustained the smallest number of scavenger species, suggesting human activity may be overriding other macroecological processes in shaping scavenger communities. Our results highlight the effect of human impact at a global scale. As species-rich assemblages tend to be more functional, we warn about possible reductions in ecosystem functions and the services provided by scavengers in human-dominated landscapes in the Anthropocene.

History

Preferred citation

Sebastián-González, E., Barbosa, J.M., Pérez-García, J.M., Morales-Reyes, Z., Botella, F., Olea, P.P., Mateo-Tomás, P., Moleón, M., Hiraldo, F., Arrondo, E., Donázar, J.A., Cortés-Avizanda, A., Selva, N., Lambertucci, S.A., Bhattacharjee, A., Brewer, A., Anadón, J.D., Abernethy, E., Rhodes, O.E., ... Sánchez-Zapata, J.A. (2019). Scavenging in the Anthropocene: Human impact drives vertebrate scavenger species richness at a global scale. Global Change Biology, 25(9), 3005-3017. https://doi.org/10.1111/gcb.14708

Journal title

Global Change Biology

Volume

25

Issue

9

Publication date

01/01/2019

Pagination

3005-3017

Publisher

Wiley

Publication status

Published

Online publication date

24/06/2019

ISSN

1354-1013

eISSN

1365-2486

Language

en

Exports