RT info:eu-repo/semantics/article
T1 Revisiting the foraging ecology and extinction history of two endemic vertebrates from Tenerife, Canary Islands
A1 Rando Reyes, Juan Carlos
A1 Crowley, Brooke Erin
A1 Yanes, Yurena
A1 Mosher, Stella Grace
A2 Biología Animal y Edafología y Geología
A2 Evoluciónecología y conservación de vertebrados en Macaronesia (VerMac)
K1 Canary Islands
K1 Canariomys bravoi
K1 Gallotia goliath
K1 carbon isotopes
K1 nitrogen isotopes
K1 bone collagen
K1 radiocarbon date
K1 Cueva del Viento
K1 Icod
K1 Buenavista del Norte
AB We used carbon (δ13C) and nitrogen (δ15N) isotopes to examine the foraging ecology of Tenerife giant rats (Canariomys bravoi) and lizards (Gallotia goliath) in northwestern Tenerife, which until recently, were the island’s largest terrestrial vertebrates. We combined new isotope data for 28 C. bravoi and 14 G. goliath with published regional data for both species and then compared these with data for co-occurring extant taxa and modern C3 plants. Isotope data suggest both extinct species relied primarily on C3 resources and were trophic omnivores. However, the two species appear to have partitioned their resources when living in sympatry. Isotopic overlap between C. bravoi and Rattus spp., and between G. goliath, extant Gallotia galloti, and introduced rabbits (Oryctolagus cuniculus) suggests reliance on similar foods. We radiocarbon dated four C. bravoi and two G. goliath with the mostextremeisotope values. These new dates do notsettle the question of what triggered the demise of either species. Nevertheless, the data are most consistent with anthropogenically-induced extinction. Temporal isotopic trends contradict expectations if regional climate were responsible, and confidence intervals for radiocarbon dates suggest it is highly likely that both species were present when humansfirst settled the island.
YR 2019
FD 2019
LK http://riull.ull.es/xmlui/handle/915/38186
UL http://riull.ull.es/xmlui/handle/915/38186
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-nov-2024