2005
DOI: 10.1111/j.1744-7429.2005.00026.x
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Catastrophic Population Declines and Extinctions in Neotropical Harlequin Frogs (Bufonidae: Atelopus)1

Abstract: We surveyed the population status of the Neotropical toad genus Atelopus, and document recent catastrophic declines that are more severe than previously reported for any amphibian genus. Of 113 species that have been described or are candidates for description, data indicate that in 42 species, population sizes have been reduced by at least half and only ten species have stable populations. The status of the remaining taxa is unknown. At least 30 species have been missing from all known localities for at least… Show more

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Cited by 287 publications
(334 citation statements)
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“…It has been speculated that this species has experienced several local extinctions across its geographic range and thus it has been recently classified as critically endangered (IUCN, 2006). The main cause for declines in this severely impacted genus is thought to be the presence of the emerging infectious disease Chytriomycosis driven by global warming (La Marca et al 2005, Pounds, et al 2006. Other species of amphibians that may be declining in the region are Ollotis conifera and Lithobates warszchewitschii, both species were previously observed as abundant, but only rarely recorded in this study.…”
Section: Discussionmentioning
confidence: 99%
“…It has been speculated that this species has experienced several local extinctions across its geographic range and thus it has been recently classified as critically endangered (IUCN, 2006). The main cause for declines in this severely impacted genus is thought to be the presence of the emerging infectious disease Chytriomycosis driven by global warming (La Marca et al 2005, Pounds, et al 2006. Other species of amphibians that may be declining in the region are Ollotis conifera and Lithobates warszchewitschii, both species were previously observed as abundant, but only rarely recorded in this study.…”
Section: Discussionmentioning
confidence: 99%
“…Genus Atelopus is endemic to Costa Rica, Panama, Colombia, Ecuador, Peru, Bolivia, Venezuela, Suriname, Guyana, Brazil, and French Guiana and, since 1980, 67 of 108 extant "species" have ostensibly gone extinct (20). Of these 108 extant species, 32 are undescribed (20). The second dataset, described by Lips et al (17), is the year that each of 59 species (all described) in genera Atelopus and Telmatobius (4 species found in Ecuador and Peru) began to decline [year of decline (YOD)].…”
mentioning
confidence: 99%
“…The first dataset, compiled by La Marca et al (20), is the year (between 1980 and 1998) that each "species" in the frog genus Atelopus was observed for the last time [last year observed (LYO)], presumably owing to the species going extinct or at least undergoing a dramatic decline. Genus Atelopus is endemic to Costa Rica, Panama, Colombia, Ecuador, Peru, Bolivia, Venezuela, Suriname, Guyana, Brazil, and French Guiana and, since 1980, 67 of 108 extant "species" have ostensibly gone extinct (20). Of these 108 extant species, 32 are undescribed (20).…”
mentioning
confidence: 99%
“…The emergence of Batrachochytrium dendrobatidis (Bd), the etiological agent of chytridiomycosis, is responsible for regional mass mortality events of amphibian hosts, as well as host population declines and extinctions (Lips et al, 2008;Schloegel et al, 2006;La Marca et al, 2005;Laurance et al, 1996). These regional effects are detectable at broad geographic scales: the pathogen occurs on six continents, infects hundreds of amphibian species, and is widely recognized as a major contributor to the global decline of amphibians Lips et al, 2008).…”
mentioning
confidence: 99%
“…The amphibian fauna of Sardinia is unique: of the nine native amphibian species, six are endemic, and another two have extremely restricted ranges limited to Sardinia, Corsica, and nearby islands. Both small range size and island endemicity may increase extinction risk Pimm, 1991), and many of the species driven to extinction by chytridiomycosis were known from restricted ranges (La Marca et al, 2005;Schloegel et al, 2006). Six of Sardinia's amphibians are listed as ''Near Threatened,'' ''Vulnerable,'' or ''Endangered'' by the IUCN (http://www.globalamphibians.org/).…”
mentioning
confidence: 99%