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Collapse of the endemic lizard Podarcis pityusensis on the island of Ibiza mediated by an invasive snake

Current Zoology 2022年第3期68卷 295-303页

作者： Elba MONTES Fred KRAUS Brahim CHERGUI Juan M.PLEGUEZUELOS Department of Zoology Faculty of Biological SciencesUniversity of Valenciac/Dr.Moliner50BurjassotE-46100 ValenciaSpain Department of Ecology and Evolutionary Biology University of MichiganAnn ArborMI 48109USA Laboratoire Ecologie SystématiqueConservation de la BiodiversitéFacultédes Sciences de TétouanUniversitéAbdelmalek EssaâdiBP 2121 El M’HannechTétouanMorocco Department of Zoology Faculty of SciencesGranada UniversityGranada E-18071Spain

The invasive snake Hemorrhois hippocrepis colonized the island of Ibiza(Balearic Islands)in 2003 as stowaways inside trunks of olive trees imported for *** has quickly spread since 2010,posing a threat to the island’s only remaining endemic vertebrate,the Ibiza wall lizard Podarcis *** map the yearly expansion rate of the snake and estimate via transect surveys how severely it affects the distribution and abundance of the endemic *** well,we surveyed 9 of 30 small lizard populations on islets surrounding Ibiza that have been isolated since the Last Glacial *** had invaded 49%of Ibiza’s land area by 2018,and censuses show a critical contrast in lizard abundance between areas with and without snakes;almost all censuses in areas without snakes show lizard presence whereas nearly all censuses in areas with *** lack lizard ***,at least one subspecies previously thriving on one of the offshore islets has become extinct,and there have been several snakes recorded swimming between Ibiza and the surrounding ***,lizard populations have been dramatically reduced or have vanished within the range of the snake,and our results quantitatively support upgrading this species’threat level for *** study can inform to programs to manage invasive snake populations and to conservation actions to recover the endemic lizard.

关键词： Balearic Islands conservation extinction Hemorrhois hippocrepis lizard census

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