Browsing by Author "Charrier, Andres"

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    A flagship for Austral temperate forest conservation: an action plan for Darwin's frogs brings key stakeholders together
    (2021) Azat, Claudio; Valenzuela-Sanchez, Andres; Delgado, Soledad; Cunningham, Andrew A.; Alvarado-Rybak, Mario; Bourke, Johara; Briones, Raul; Cabeza, Osvaldo; Castro-Carrasco, Camila; Charrier, Andres; Correa, Claudio; Crump, Martha L.; Cuevas, Cesar C.; de la Maza, Mariano; Diaz-Vidal, Sandra; Flores, Edgardo; Harding, Gemma; Lavilla, Esteban O.; Mendez, Marco A.; Oberwemmer, Frank; Carlos Ortiz, Juan; Pastore, Hernan; Penafiel-Ricaurte, Alexandra; Rojas-Salinas, Leonora; Manuel Serrano, Jose; Sepulveda, Maximiliano A.; Toledo, Veronica; Ubeda, Carmen; Uribe-Rivera, David E.; Valdivia, Catalina; Wren, Sally; Angulo, Ariadne
    Darwin's frogs Rhinoderma darwinii and Rhinoderma rufum are the only known species of amphibians in which males brood their offspring in their vocal sacs. We propose these frogs as flagship species for the conservation of the Austral temperate forests of Chile and Argentina. This recommendation forms part of the vision of the Binational Conservation Strategy for Darwin's Frogs, which was launched in 2018. The strategy is a conservation initiative led by the IUCN SSC Amphibian Specialist Group, which in 2017 convened 30 governmental, non-profit and private organizations from Chile, Argentina and elsewhere. Darwin's frogs are iconic examples of the global amphibian conservation crisis: R. rufum is categorized as Critically Endangered (Possibly Extinct) on the IUCN Red List, and R. darwinii as Endangered. Here we articulate the conservation planning process that led to the development of the conservation strategy for these species and present its main findings and recommendations. Using an evidence-based approach, the Binational Conservation Strategy for Darwin's Frogs contains a comprehensive status review of Rhinoderma spp., including critical threat analyses, and proposes 39 prioritized conservation actions. Its goal is that by 2028, key information gaps on Rhinoderma spp. will be filled, the main threats to these species will be reduced, and financial, legal and societal support will have been achieved. The strategy is a multi-disciplinary, transnational endeavour aimed at ensuring the long-term viability of these unique frogs and their particular habitat.
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    A new species of Alsodes (Anura: Alsodidae) from Altos de Cantillana, central Chile
    (MAGNOLIA PRESS, 2015) Charrier, Andres; Correa, Claudio; Castro, Camila; Mendez, Marco A.
    Based on morphological and molecular evidence (mitochondrial and nuclear sequences) we describe a new species of spiny-chest frog, Alsodes cantillanensis, from central Chile (around 34 degrees S). The type locality, Quebrada Infiernillo, is located in the Coastal Range at approximately 65 km from Santiago (Metropolitan Region), the capital of Chile. The distribution of the new species is included entirely in that of A. nodosus (32-36 degrees S approximately), which was identified as the sister taxon according to molecular phylogenetic analyses. Moreover, both species are sympatric in the type locality. The new species was found in a Nothofagus macrocarpa relict forest potentially threatened by gold mining activities. We identify other threats for its conservation and some biological data needed for understanding the evolution of this species. This discovery reveals the scarce knowledge about biogeography, evolution and ecology of spiny- chest frogs from central Chile.
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    Current threats faced by amphibian populations in the southern cone of South America
    (2022) Pablo Kacoliris, Federico; Berkunsky, Igor; Carlos Acosta, Juan; Acosta, Rodrigo; Gabriela Agostini, Maria; Sebastian Akmentins, Mauricio; Luz Arellano, Maria; Azat, Claudio; Carla Bach, Nadia; Mirta Blanco, Graciela; Calvo, Rodrigo; Charrier, Andres; Corbalan, Valeria; Correa, Claudio; Elena Cuello, Maria; Deutsch, Camila; Di-Pietro, Diego; Soledad Gaston, Maria; Gomez-Ales, Rodrigo; Kass, Camila; Kass, Nicolas; Lobos, Gabriel; Agustin Martinez, Tomas; Martinez-Aguirre, Tomas; Mora, Marta; Nieva-Cocilio, Rodrigo; Pastore, Hernan; Manuel Perez-Iglesias, Juan; Piaggio-Kokot, Lia; Rabanal, Felipe; Jesus Rodriguez-Munoz, Melina; Cecilia Sanchez, Laura; Tala, Charif; Ubeda, Carmen; Vaira, Marcos; Alicia Velasco, Melina; Vidal, Marcela; Daniel Williams, Jorge
    In this work, we update and increase knowledge on the severity and extent of threats affecting 57 populations of 46 amphibian species from Chile and Argentina in southern South America. We analyzed the intrinsic conser-vation problems that directly impact these populations. We shared a questionnaire among specialists on threats affecting target amphibian populations with information on i) range, ii) historical occurrence and abundance, iii) population trends, iv) local extinctions, v) threats, and vi) ongoing and necessary conservation/research. We assessed association patterns between reported threats and population trends using multiple correspondence analysis. Since 2010, 25 of 57 populations have declined, while 16 experienced local extinctions. These pop-ulations were affected by 81% of the threat categories analyzed, with those related to agricultural activities and/ or habitat modifications being the most frequently reported. Invasive species, emerging diseases, and activities related to grazing, ranching, or farming were the threats most associated with population declines. Low con-nectivity was the most frequent intrinsic conservation problem affecting 68% of the target populations, followed by low population numbers, affecting 60%. Ongoing monitoring activity was conducted in 32 (56%) populations and was the most frequent research activity. Threat mitigation was reported in 27 (47%) populations and was the most frequent ongoing management activity. We found that habitat management is ongoing in 5 (9%) pop-ulations. At least 44% of the amphibian populations surveyed in Chile and Argentina are declining. More in-formation related to the effect of management actions to restore habitats, recover populations, and eliminate threats such as invasive species is urgently needed to reverse the conservation crisis facing amphibians in this Neotropical region.
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    Natural history notes of Telmatobius dankoi (Anura, Telmatobiidae), a critically endangered species from northern Chile
    (TAYLOR & FRANCIS LTD, 2016) Lobos, Gabriel; Rebolledo, Nicolas; Charrier, Andres; Rojas, Osvaldo
    Telmatobius dankoi is a species described from only one locality in the Atacama Desert in northern Chile and therefore is considered to be critically endangered. There has been no information on its biology or ecology since its original description in 1999. Here we provide information on its distribution, habitat, density, diet and threats. The habitat of this species is restricted to a single stream, where it is submitted to strong anthropic pressure. Its density suggests that it forms only a small population. The diet consisted mainly of benthic invertebrates. Telmatobius dankoi is thus one of the most threatened vertebrates of Chile.
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    Natural history of the Mocha Island ground frog Eupsophus insularis, a critically endangered species
    (2021) Lobos, Gabriel; Rebolledo, Nicolas; Charrier, Andres; Correa, Claudio; Rabanal, Felipe; Vidal, Marcela
    Eupsophus insularis inhabits a small island in the southeast Pacific, and its natural history is unknown. The species is listed as Critically Endangered based on its restricted distribution, i.e., an island under ongoing habitat deterioration. We assessed the distribution, habitat requirements, density, diet, and threats of the species with the aim of proposing strategies for its conservation. The species is restricted to a terrestrial strip 24-205 m above sea level associated with pristine temperate humid forests located in areas of low slope. A capture-recapture study indicated that its density was 15-66 individuals/ha of optimal habitat. Its diet is composed mainly of invertebrates of the humid forest floor. The high prevalence of chytrid fungus and habitat loss are important threats to the species. Herein, we present data to help with the management of the species on the island and that might help in designing more robust strategies to mitigate present and future threats.