English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/218780
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Network structure of vertebrate scavenger assemblages at the global scale: drivers and ecosystem functioning implications

AuthorsSebastián-González, Esther ; Morales-Reyes, Zebensui; Botella, Francisco; Naves-Alegre, Lara; Pérez-García, Juan M.; Mateo-Tomás, Patricia ; Olea, Pedro P.; Moleón, Marcos; Barbosa, Jomar M.; Hiraldo, Fernando; Arrondo, Eneko; Donázar, José A. ; Cortés-Avizanda, Ainara ; Selva, Nuria; Lambertucci, Sergio A.; Bhattacharjee, Aishwarya; Brewer, Alexis L.; Abernethy, Erin F.; Turner, Kelsey L.; Beasley, James C.; DeVault, Travis L.; Gerke, Hannah C.; Rhodes, Olin E.; Ordiz, Andrés; Wikenros, Camilla; Zimmermann, Barbara; Wabakken, Petter; Wilmers, Christopher C.; Smith, Justine A.; Kendall, Corinne J.; Ogada, Darcy; Frehner, Ethan; Allen, Maximilian L.; Wittmer, Heiko U.; Butler, James R. A.; Toit, Johan T. du; Margalida, Antoni ; Oliva-Vidal, Pilar; Wilson, David; Jerina, Klemen; Krofel, Miha; Kostecke, Rich; Inger, Richard; Per, Esra; Ayhan, Yunus; Ulusoy, Hasan; Vural, Doğanay; Inagaki, Akino; Koike, Shinsuke; Samson, Arockianathan; Perrig, Paula L.; Spencer, Emma; Newsome, Thomas M.; Heurich, Marco; Anadón, José D.; Buechley, Evan R.; Sánchez-Zapata, José A.
Consumption rate
Ecological networks
Global change
Issue Date2020
CitationEcography 43(8): 1143-1155 (2020)
AbstractThe organization of ecological assemblages has important implications for ecosystem functioning, but little is known about how scavenger communities organize at the global scale. Here, we test four hypotheses on the factors affecting the network structure of terrestrial vertebrate scavenger assemblages and its implications on ecosystem functioning. We expect scavenger assemblages to be more nested (i.e. structured): 1) in species-rich and productive regions, as nestedness has been linked to high competition for carrion resources, and 2) regions with low human impact, because the most efficient carrion consumers that promote nestedness are large vertebrate scavengers, which are especially sensitive to human persecution. 3) We also expect climatic conditions to affect assemblage structure, because some scavenger assemblages have been shown to be more nested in colder months. Finally, 4) we expect more organized assemblages to be more efficient in the consumption of the resource. We first analyzed the relationship between the nestedness of the scavenger assemblages and climatic variables (i.e. temperature, precipitation, temperature variability and precipitation variability), ecosystem productivity and biomass (i.e. NDVI) and degree of human impact (i.e. human footprint) using 53 study sites in 22 countries across five continents. Then, we related structure (i.e. nestedness) with its function (i.e. carrion consumption rate). We found a more nested structure for scavenger assemblages in regions with higher NDVI values and lower human footprint. Moreover, more organized assemblages were more efficient in the consumption of carrion. However, our results did not support the prediction that the structure of the scavenger assemblages is directly related to climate. Our findings suggest that the nested structure of vertebrate scavenger assemblages affects its functionality and is driven by anthropogenic disturbance and ecosystem productivity worldwide. Disarray of scavenger assemblage structure by anthropogenic disturbance may lead to decreases in functionality of the terrestrial ecosystems via loss of key species and trophic facilitation processes.
Publisher version (URL)http://dx.doi.org/10.1111/ecog.05083
Identifiersdoi: 10.1111/ecog.05083
issn: 1600-0587
Appears in Collections:(IMEDEA) Artículos
(IREC) Artículos
(EBD) Artículos
Files in This Item:
File Description SizeFormat 
ecog.05083.pdf2,42 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.