Physiology, environmental change, and anuran conservation

Navas, Carlos A.; Otani, Lye

doi:10.11606/issn.2316-9079.v6i2p83-103

Cited by 44 publications

(50 citation statements)

References 180 publications

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“…Ectothermic species are particularly sensitive to environmental change (Navas and Otani 2007). The current, modeled distribution of Melanophryniscus montevidensis based on climate conditions, coincides with previous distributions proposed for this species (BernardoSilva et al 2012, IUCN 2013.…”

Section: Discussionsupporting

confidence: 87%

Potential Effects of Climate Change on the Distribution of an Endangered Species: Melanophryniscus montevidensis (Anura: Bufonidae)

Toranza¹,

Maneyro²

2014

Phyllomedusa

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Potential effects of climate change on the distribution of an endangered species:Melanophryniscus montevidensis (Anura: Bufonidae). Species distributions are linked with climate. Among the effects predicted by the Intergovernmental Panel on Climate Change are changes in precipitation patterns and increases in mean temperatures-factors potentially having a major impact on threatened, rare, and endemic species. Using models to forecast possible changes in the distributions of different species under different climatechange scenarios, we can identify probable impacts on species and build effective conservation strategies. We modeled the effects of two climate-change scenarios on the geographical distribution of the regionally endemic bufonid, Melanophryniscus montevidensis, categorized as vulnerable by the IUCN and as endangered by the Uruguayan Red List of amphibians. Ecological niche models were generated to describe the present and possible future distributions of this species in 2050 and 2080, given severe (A2) and moderate (B2) climatic changes. Legacy data for M. montevidensis were obtained from Uruguayan biocollections and climate data were acquired from the WorldClim database. At present, M. montevidensis could occur along the Atlantic Uruguayan coast and a small section of the southern Brazilian coast. However, changes in climate may lead to a loss of suitable environmental conditions for this toad; thus, this endangered species is vulnerable and in urgent need of protection.Keywords: amphibians, geographical distribution, niche models, threatened species, Uruguay. 98Phyllomedusa -12(2), December 2013 Resumen Efectos potenciales del cambio climático sobre la distribución de una especie amenazada: Melanophryniscus montevidensis (Anura: Bufonidae). La distribución de las especies está relacionada con el clima. Entre los efectos predichos por el Panel Intergubernamental de Cambio Climático, se encuentran los cambios en los patrones de precipitación y los aumentos en la temperatura media global. Estos factores tienen un impacto mayor en especies amenazadas, raras o endémicas. Usando modelos para predecir posibles cambios en la distribución de especies bajo diferentes escenarios de cambios climático, podemos identificar probables impactos sobre las especies y construir estrategias efectivas de conservación. Modelamos los efectos de dos escenarios de cambio climático en la distribución geográfica de un bufónido regionalmente endémico, Melanophryniscus montevidensis, categorizado como Vulnerable por la UICN, y como amenazado según la Lista Roja de Anfibios de Uruguay. Fueron generados modelos de nicho para describir la distribución presente y futura en 2050 y 2080, bajo los escenarios A2 (severo) y B2 (moderado). Los registros fueron obtenidos de las principales colecciones del país y los datos climáticos se tomaron de la base de datos WorldClim. Actualmente, M. montevidensis podría encontrarse en la costa Atlántica de Uruguay, y una pequeña parte de la costa del sureste de Brasil. Sin embargo, los cambi...

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Section: Discussionsupporting

confidence: 87%

Potential Effects of Climate Change on the Distribution of an Endangered Species: Melanophryniscus montevidensis (Anura: Bufonidae)

Toranza¹,

Maneyro²

2014

Phyllomedusa

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“…The presence of at least four species endemic to the state of Rio de Janeiro attest to the importance of the PETP as a conservation unit for anuran species, which are currently facing a worldwide decline due to factors such as global climate change, pollution, habitat loss, and the spread of diseases such as chytridiomycosis (e.g. YOUNG et al 2004, TOLEDO et al 2006, NAVAS & OTANI 2007.…”

Section: Discussionmentioning

confidence: 99%

Density and richness of leaf litter frogs (Amphibia: Anura) of an Atlantic Rainforest area in the Serra dos Órgãos, Rio de Janeiro State, Brazil

Siqueira¹,

Vrcibradic²,

Almeida‐Gomes³

et al. 2009

Zoologia (Curitiba, Impr.)

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Data on species composition, richness, and density are presented for the leaf litter frog assemblage of an area of Atlantic Rainforest at the Serra dos Órgãos mountain range, in the state of Rio de Janeiro, southeastern Brazil. Three sampling methods were used: plot sampling, visual encounter surveys, and pitfall traps. The local assemblage of leaf litter frogs was composed of 16 species, with the direct-developing species, Euparkerella brasiliensis (Parker, 1926), being the most abundant. The estimated density of the local leaf litter frog assemblage based on plot sampling was 17.1 ind/100 m² and the estimated overall leaf litter frog mass was 684.2 g/ha. The estimated density of leaf litter frogs at the present study is the highest currently reported for Atlantic Rainforest areas, which reinforces the idea of higher densities of leaf litter frogs in the Neotropical Region compared to the Old World tropics

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“…In the only study coincident with the areas of endemism found for terrestrial vertebrates. Anurans are sensitive to environmental degradation and considered to be among the most vulnerable vertebrate groups (Navas and Otani 2007). In Brazil, 41 anuran species (ca.…”

Section: Introductionmentioning

confidence: 99%

Amphibians from Santa Isabel do Rio Negro, Brazilian Amazonia

et al. 2017

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Amphibians from Santa Isabel do Rio Negro, Brazilian Amazonia. A species list of amphibians from Santa Isabel do Rio Negro in Brazilian Amazonia is provided. Collections were made from March-April 2012 along each of two 3-km trails with the following sampling methods: (1) pitfall traps with drift fences; (2) visual and auditory surveys; and (3) chance encounters. The trail at Daraá is north of the Rio Negro, whereas the other in Ayuanã is south of the river. Forty species of anurans and one salamander species representing 20 genera and nine families were recorded. The species composition was compared with those of 16 other studies conducted in the Guiana, Imeri, and Jaú areas of endemism, where species richness varies from 21-63, and similarity indices range from 23-100%. The anuran fauna at our sites resembles that of Flota Faro in eastern Amazonia more than it does that of the nearest site in the Departamento del Guainía of Colombia. The index of similarity is extremely variable between sites of the same and distinct areas of endemism. This pattern also was observed in the cluster analysis. As expected, geographically close areas have similar faunal compositions. However, the anuran fauna of 184 Phyllomedusa -16(2), December 2017Parque Nacional do Jaú (Jaú area of endemism) resembles that of Manaus (Guiana area of endemism) more closely than it does that of the Ayuanã River, which belongs to the same area of endemism as Parque Nacional do Jaú. The limits of the areas of endemism are mammals, than by the assemblage of amphibians and squamate reptiles.

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Physiology, environmental change, and anuran conservation

Cited by 44 publications

References 180 publications

Potential Effects of Climate Change on the Distribution of an Endangered Species: Melanophryniscus montevidensis (Anura: Bufonidae)

Potential Effects of Climate Change on the Distribution of an Endangered Species: Melanophryniscus montevidensis (Anura: Bufonidae)

Density and richness of leaf litter frogs (Amphibia: Anura) of an Atlantic Rainforest area in the Serra dos Órgãos, Rio de Janeiro State, Brazil

Amphibians from Santa Isabel do Rio Negro, Brazilian Amazonia

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