LAMBERTUCCI sergio Agustin
capítulos de libros
The scavenging community
NURIA SELVA; MOLEÓN, MARCOS; DEVAULT, TRAVIS L; SEBASTIÁN-GONZÁLEZ, ESTHER; QUAGIOTTO, M. M.; BAILEY, D. M.; LAMBERTUCCI, S.A.; MARGALIDA, ANTONI
Carrion Ecology and Management
Interactions among obligate scavengers have always been recognized as highly organized and driven by competition , while scavenging has traditionally been accepted as a more random and opportunistic process for facultative scavengers. In the last decade, however, many studies have demonstrated that vertebrate scavenger communities can show complex patterns that deviate from random processes. We can consider that an assemblage is structured if it is more ordered than expected by chance. In random communities, interactions are the result of opportunistic encounters (i.e. a facultative scavenger finding a carcass without an active search for it). Structured communities show identifiable patterns and are a consequence of one or several interacting processes shaping which interactions are possible and which more likely.Thus, scavenger assemblages show non-random nested organizations that can emerge when carcasses are not monopolized by a single consumer (e.g. because they are small). In general, nestedness in scavenger communities is the consequence of three interacting processes: 1) predictability in the availability of the resource, 2) facilitative processes provided by key species, and 3) differences in the abilities of the scavenger species to compete for the carrion.