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The ecological consequences of megafaunal loss: giant tortoises and wetland biodiversity.

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Froyd Cynthia A

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ArtículoIdioma: Inglés Tema(s):

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597.9246 22

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En: Ecology Letters Vol. 17 (Mar 2014), p. 144-154.Tema: The giant tortoises of the Galapagos have become greatly depleted since European discovery of the islands in the 16th Century, with populations declining from an estimated 250 000 to between 8000 and 14 000 in the 1970s. Successful tortoise conservation efforts have focused on species recovery, but ecosystem conservation and restoration requires a better understanding of the wider ecological consequences of this drastic reduction in the archipelago’s only large native herbivore. We report the ﬁrst evidence from palaeoecological records of coprophilous fungal spores of the formerly more extensive geographical range of giant tortoises in the highlands of Santa Cruz Island. Upland tortoise populations on Santa Cruz declined 500–700 years ago, likely the result of human impact or possible climatic change. Former freshwater wetlands, a now limited habitattype, were found to have converted to Sphagnum bogs concomitant with tortoise loss, subsequently leading to the decline of several now-rare or extinct plant species.

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Imagen de cubierta	Tipo de ítem	Biblioteca actual	Biblioteca de origen	Colección	Ubicación en estantería	Signatura topográfica	Materiales especificados	Info Vol	URL	Copia número	Estado	Notas	Fecha de vencimiento	Código de barras	Reserva de ítems	Prioridad de la cola de reserva de ejemplar	Reservas para cursos
	Artículo	Corley Smith Library Artículos		Galápagos		597.9246 FRO 2014 (Navegar estantería(Abre debajo))					Disponible			2016-0087
	Documento electrónico	Corley Smith Library Colección PDF		Galápagos		597.9246 FRO 2014 (Navegar estantería(Abre debajo))					Disponible			2021-1828

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Previo	597.924 WAL 1978 Locomoter behavior of the Galapagos giant tortoise Geochelone elephantopus: (abstract) /	597.924 WAL 1995 Last of the giants /	597.924 ZUG 1997 Galápagos tortoise nomenclature :	597.9246 FRO 2014 The ecological consequences of megafaunal loss:	597.9246 GAR Naturally rare versus newly rare:	597.9246 GIB Demographic Outcomes and Ecosystem Implications of Giant Tortoise Reintroduction to Española Island, Galapagos.	597.9246 LOI Population genomics of the endangered giant Galápagos tortoise.	Siguiente

The giant tortoises of the Galapagos have become greatly depleted since European discovery of the islands in the 16th Century, with populations declining from an estimated 250 000 to between 8000 and 14 000 in the 1970s. Successful tortoise conservation efforts have focused on species recovery, but ecosystem conservation and restoration requires a better understanding of the wider ecological consequences of this drastic reduction in the archipelago’s only large native herbivore. We report the ﬁrst evidence from palaeoecological records of coprophilous fungal spores of the formerly more extensive geographical range of giant tortoises in the highlands of Santa Cruz Island. Upland tortoise populations on Santa Cruz declined 500–700 years ago, likely the result of human impact or possible climatic change. Former freshwater wetlands, a now limited habitattype, were found to have converted to Sphagnum bogs concomitant with tortoise loss, subsequently leading to the decline of several now-rare or extinct plant species.

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