Overcoming the lack of distribution data for range‐restricted habitat specialist frogs

Author:

Barata Izabela M.12ORCID,Uhlig Vivian M.3,Cortês Lara G.3,Fath Franciele3,Griffiths Richard A.4

Affiliation:

1. Durrell Wildlife Conservation Trust Les Augrès Manor Trinity, Jersey Channel Islands

2. Instituto Biotrópicos, Diamantina Minas Gerais Brasil

3. Centro Nacional de Pesquisa e Conservação de Répteis e Anfíbios Instituto Chico Mendes de Conservação da Biodiversidade Goiânia Brasil

4. Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation University of Kent Canterbury UK

Abstract

AbstractWith over 40% of species threatened with extinction, the distributional range of most amphibians is still unknown, generating uncertainty whether species are naturally rare, under‐sampled, or difficult to detect. We implemented a modelling approach that uses bromeliads as surrogates to predict the distribution of habitat specialist frogs that lack distributional data. We aimed to predict and survey potential new sites for the occurrence of a rare and microendemic bromeliad‐dwelling frog from the Atlantic Rainforest of Brazil. We used Maxent to predict suitable areas based on climate and topographic profiles, combined with 21 occurrence records of bromeliads within which our target frog species (Crossodactylodes itambe) is strictly restricted. The bromeliad‐based models identified four areas potentially suitable, and subsequent surveys revealed an entirely new species of a rare bromeliad‐dwelling frog in one of the areas. We demonstrate that using easy‐to‐survey surrogate species that have a strong relationship with species that are hard to detect has enormous potential to reveal crucial information on the potential ranges and distribution of cryptic taxa. Such a surrogate modelling approach could be extended to other habitat specialist species that lack distribution data, such as amphibians restricted to specific refugia and/or reproduction sites. This could improve the targeting of surveys and increase understanding of the patterns of rarity and the drivers of species distribution, especially for areas with high endemicity and range‐restricted frogs.

Funder

Mohammed bin Zayed Species Conservation Fund

Rufford Foundation

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Publisher

Wiley

Reference54 articles.

1. Amphibian species composition and priorities for regional conservation at the Espinhaço Mosaic, Southeastern Brazil;Barata I.M.;Herpetological Conservation and Biology,2016

2. Activity pattern and behavior of an endemic bromeliad frog observed through camera trapping;Barata I.M.;Herpetological Review,2018

3. The power of monitoring: optimizing survey designs to detect occupancy changes in a rare amphibian population

4.

A new species of Crossodactylodes (Anura: Leptodactylidae) from Minas Gerais, Brazil: first record of genus within the Espinhaço Mountain Range

5. Predictors of Abundance of a Rare Bromeliad-Dwelling Frog (Crossodactylodes itambe) in the Espinhaço Mountain Range of Brazil

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