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Froyd, C. A., Coffey, E. E. D., Knaap, W. V. D. O., Leeuwen, J. V. F. N., Tye, A., & Willis, K. J. (2014). The ecological consequences of megafaunal loss: Giant tortoises and wetland biodiversity. Ecology Letters, 17(2), 144–154. 
Added by: Sarina Wunderlich (06 Jul 2014 16:10:45 UTC)
Resource type: Journal Article
DOI: 10.1111/ele.12203
BibTeX citation key: Froyd2014
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Categories: General
Keywords: Habitat - habitat, Schildkröten - turtles + tortoises, Südamerika - South America
Creators: Coffey, Froyd, Knaap, Leeuwen, Tye, Willis
Collection: Ecology Letters
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Abstract     
Testudinidae Geochelone nigra The giant tortoises of the Galápagos 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 habitat-type, 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.
Added by: Sarina Wunderlich  
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