RT info:eu-repo/semantics/article
T1 Late-Holocene asynchronous extinction of endemic mammals on the eastern Canary Islands
A1 Rando Reyes, Juan Carlos
A1 Alcover, Josep Antoni
A1 Michaux, Jacques
A1 Hutterer, Rainer
A1 Navarro, Juan Francisco
A2 Biología Animal y Edafología y Geología
A2 Evoluciónecología y conservación de vertebrados en Macaronesia (VerMac)
K1 14C AMS dating
K1 Canary Islands
K1 Crocidura canariensis
K1 hyperpredation
K1 Malpaisomys insularis
K1 Mus musculus
K1 Rattus rattus
K1 Tyto alba
AB The Lava mouse (Malpaisomys insularis), and the Canarian shrew (Crocidura canariensis) are endemic of the Eastern Canary Islands and islets. The formeris extinct while Canarian shrew survives in the two main islands and two islets. In order to provide insights regarding causes and processes contributingto the extinction of these endemic mammals: (i) we established last occurrence dates for Lava mouse, and first records for two exotic species – Housemouse (Mus musculus) and Black rat (Rattus rattus) – through direct 14C AMS dating of collagen from bones; (ii) we analysed recent material from Barnowl (Tyto alba gracilirostris) roosting sites to evaluate its impact on Canarian shrew in the presence of introduced rodents. The new data strongly suggestthat the extinction of Lava mouse was the result of an accumulative process of independent disappearances (or ‘local extinctions’) affecting the isolatedpopulations. The timing of the introduction of the Black rat on the main islands (before Middle Age European contact in Lanzarote and after Middle AgeEuropean contact in Fuerteventura) matches with the last occurrence dates for the presence of Lava mouse on these islands, and are very probablytheir cause. The losses of these Lava mouse populations occurred in an asynchronous way, spreading across at least six centuries. On small islands,hyperpredation emerges as the most plausible process to explain the disappearance of the Lava mouse in the absence of rat populations, althoughstochastic processes can not be definitively excluded
YR 2011
FD 2011
LK http://riull.ull.es/xmlui/handle/915/35285
UL http://riull.ull.es/xmlui/handle/915/35285
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-nov-2024