An austral anuran assemblage in the Neotropics: seasonal occurrence correlated with photoperiod

Both, Camila; Kaefer, Ígor Luís; Santos, Tiago Gomes dos; Cechin, Sonia

doi:10.1080/00222930701847923

Cited by 105 publications

(79 citation statements)

References 26 publications

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“…Oda et al, 2009;São-Pedro & Feio, 2010;Kopp et al, 2010;Ferreira et al, 2012;Venâncio et al, 2014). Esta relação se deve à dependência dos anfíbios aos ambientes úmidos tanto para manutenção das condições fisiológicas quanto para reprodução (Hatano et al, 2002;Both et al, 2008;Canavero & Arim, 2009;Cole et al, 2014). A maioria das espécies de anfíbios que possuem reprodução explosiva ou restrita a poucos meses do ano sincronizam suas atividades com o período chuvoso , permitindo assim uma maior taxa de sobrevivência e aptidão (Visser et al, 2009).…”

Section: Discussionunclassified

“…A influência de fatores climáticos é conhecida tanto para anfíbios (Oda et al, 2009;São Pedro & Feio, 2010;Kopp et al, 2010;Ferreira et al, 2012;Venâncio et al, 2014), quanto para répteis (Colli, 1991;Vitt et al, 1995;Daltry et al, 1998;Nicholson et al, 2005;Vitt et al, 2008;Huey et al, 2009;Carlson et al, 2014). De forma geral, ambos os grupos são sensíveis às grandes variações nas condições climáticas, sendo estas limitantes principalmente em relação às estratégias reprodutivas (Vitt et al, 1994;Duellman, 1999;Hatano et al, 2002;Bernarde & Abe, 2006;Both et al, 2008;Canavero et al, 2009) e de forrageio (Bernarde & Abe, 2006;Huey et al, 2009;Hartmann et al, 2009), podendo variar entre regiões (Menin et al, 2008;Heatwole & Sexton, 2012;Rocha et al, 2014), entre espécies e entre o sexo e fases ontogenéticas (Nicholson et al, 2005;Bernarde & Abe, 2006;Menin et al, 2008;Cole et al, 2014).…”

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Diversidade local e influência da sazonalidade sobre taxocenoses de anfíbios e répteis na Reserva Extrativista Chico Mendes, Acre, Brasil

França

Freitas

Ramalho³

et al. 2017

Iheringia, Sér. Zool.

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ABSTRACT. Local diversity and infl uence of seasonality on amphibians and reptiles assemblages in the Reserva Extrativista Chico Mendes, Acre, Brazil. Despite the high richness of amphibians and reptiles known for the southwestern portion of the Brazilian Amazon, the knowledge of these is punctual and few studies have evaluated the temporal variations in the occurrence and abundance of species. The goals of this study were to present the amphibians and reptiles assemblages in a locality of the Chico Mendes Extractive Reserve, verify which climate variables infl uence the temporal fl uctuations in richness and abundance, and identify the main species of the amphibians and reptiles infl uenced by them. The study area is located in the Seringal Etelvi region, southwestern portion of the Reserve, municipality of Brasiléia, state of Acre. Data collection took place between October 2011 and September 2012, for 48 sampling days, using the methods of searches limited by time and pitfall traps. There were recorded 978 specimens of 31 amphibians and 54 reptiles. Higher richness and abundance of amphibians occurred during the rainy season, with the monthly abundance positively associated with the mean temperature. Only the abundance of reptiles was higher during the rainy period. However, both richness and abundance were positively associated with mean temperature. Four amphibians, Allobates gr. marchesianus, Hamptophryne boliviana (Parker, 1927), Boana geographica (Spix, 1824) and Rhinella marina (Linnaeus, 1758), and two reptiles, Kentropyx pelviceps Cope, 1868 and Norops fuscoauratus (D'Orbigny, 1837), had their monthly abundances positively associated with the mean temperature. The lizard Dactyloa punctata (Daudin, 1802) had the monthly abundance associated with precipitation. It was possible to verify the increase of richness and abundance of amphibians and reptiles during periods when the availability of resources is favorable for many species. Species can react diff erently to climatic variations, whereas others are sensitive to fl uctuations, others seem answer easily or not reduce their abundances in periods theoretically unfavorable.KEYWORDS. Richness, abundance, Southwestern Amazonia, seasonality, temporal variation.RESUMO. Apesar da elevada riqueza de anfíbios e répteis conhecida para a porção Sul-Ocidental da Amazônia brasileira, o conhecimento sobre estes é pontual e poucos estudos avaliaram as variações temporais na ocorrência e abundância das espécies. Os objetivos deste estudo foram descrever as taxocenoses de anfíbios e répteis em uma localidade da Reserva Extrativista Chico Mendes, verifi car quais variáveis climáticas infl uenciam as fl utuações temporais na riqueza e abundância e identifi car as principais espécies de anfíbios e répteis infl uenciadas por elas. A área de estudo está localizada na região do Seringal Etelvi, porção sudoeste da Reserva, município de Brasiléia, estado do Acre. A coleta de dados ocorreu entre outubro de 2011 e setembro de 2012, num total de 48 dias de amostragem, com os mét...

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Section: Discussionunclassified

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Diversidade local e influência da sazonalidade sobre taxocenoses de anfíbios e répteis na Reserva Extrativista Chico Mendes, Acre, Brasil

França

Freitas

Ramalho³

et al. 2017

Iheringia, Sér. Zool.

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“…Total annual rainfall was obtained by adding up the rainfall values of each month of the year, while the measure of the concentration of annual rainfall was determined by a circular statistical analysis (Zar 1999), using the software Oriana for Windows 2.02 (developed by Kovach Computer Services, available at http://www.kovcomp.com). Months were converted into angles (at intervals of 30 • ) and the volume of rainfall of each month was measured as the frequency of each angle (month) observed (Both et al 2008). We estimated the length of the mean vector (r), representing a measure of data concentration around the circle (year), ranging from 0 (scattered data = homogeneous rainfall through the year) to 1 (concentrated data = concentrated rainfall in any season of the year).…”

Section: Discussionmentioning

confidence: 99%

Climatic variables and altitude as predictors of anuran species richness and number of reproductive modes in Brazil

et al. 2010

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Abstract:Because anuran species are highly dependent on environmental variables, we hypothesized that anuran species richness and the number of reproductive modes from different Brazilian localities vary according to climatic and altitudinal variables. Published data were compiled from 36 Brazilian localities and climatic and altitudinal data were extracted from an available database. A partial redundancy analysis (pRDA) showed that 23.5% of the data set's variation was explained by climatic and altitudinal data, while the remaining 76.5% remained unexplained. This analysis suggests that other factors not analysed herein may also be important for predicting anuran species richness and the number of reproductive modes in Brazil. Altitude and total annual rainfall were positively correlated with anuran species richness and the number of reproductive modes, and total annual rainfall was strongly associated with these two biotic variables in the triplot of pRDA. The positive association of total annual rainfall and the negative association of the concentration of annual rainfall were already expected based on physiological and reproductive requirements of anurans. On the other hand, temperature was not associated with richness or the number of reproductive modes.

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“…Embora estudos recentes de ecologia estejam contribuindo para o conhecimento dos anfíbios do Rio Grande do Sul (Both et al 2008, muitos aspectos permanecem com poucas informações. No norte do Rio Grande do Sul os estudos de herpetofauna em remanescentes florestais são escassos (Zanella & Cechin 2006), e por esse motivo, ampliar estudos são de extrema Biota Neotrop.,vol.…”

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Herpetofauna do Parque Natural Municipal de Sertão, Rio Grande do Sul, Brasil

et al. 2013

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Abstract:The northern part of the state of Rio Grande do Sul was extensively deforested in recent decades, and only isolated fragments of the original vegetation remain. The Parque Natural Municipal de Sertão comprises a remnant of Atlantic Rain Forest, one of the largest fragments in northern Rio Grande do Sul. This study examined the diversity of the herpetofauna, focusing on environmental distribution, seasonality and species richness. We used complementary methods of sampling such as pitfall traps, active search and occasional encounters. We recorded 23 species of frogs, nine snakes and one lizard. With respect to the relationship between amphibians and reptiles and the structural and abiotic factors of the environment, the edge of the fragment showed higher richness and increased dominance of amphibians and reptiles than the interior. The highest amphibian abundances were found when the minimum temperatures were higher and maximum temperatures were lower. The abundance of snakes was correlated with humidity, and species richness was influenced by humidity and monthly average temperature. Our results reinforce the importance of the conservation of forested areas to the maintenance of the species Keywords: anuran, community, conservation, reptile, faunistic inventory, diversty. Resumo: O norte do Rio Grande do Sul foi extensivamente desflorestado durante as últimas décadas e restaram somente fragmentos isolados das áreas originais. O Parque Natural Municipal de Sertão compreende um remanescente de Mata Atlântica, um dos maiores fragmentos do norte do Rio Grande do Sul. O objetivo deste estudo foi conhecer a diversidade da herpetofauna, enfocando aspectos da distribuição no ambiente, sazonalidade e riqueza de espécies. Utilizamos métodos complementares como armadilhas de interceptação e queda, procura ativa e encontros ocasionais. Registramos 23 espécies de anfíbios anuros, nove de serpentes e uma de lagarto. Encontramos relação entre os anfíbios e répteis e os fatores estruturais e abióticos do ambiente, onde a borda do fragmento apresentou maior riqueza e maior dominância de anfíbios e répteis que o interior do fragmento. As maiores abundâncias de anfíbios foram encontradas quando as temperaturas mínimas eram maiores e temperaturas máximas menores. A abundância de serpentes foi correlacionada com a umidade e a riqueza foi influenciada pela umidade e temperatura média mensal. Nossos resultados reforçam a importância da conservação de áreas florestadas para a manutenção das espécies.

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An austral anuran assemblage in the Neotropics: seasonal occurrence correlated with photoperiod

Cited by 105 publications

References 26 publications

Diversidade local e influência da sazonalidade sobre taxocenoses de anfíbios e répteis na Reserva Extrativista Chico Mendes, Acre, Brasil

Diversidade local e influência da sazonalidade sobre taxocenoses de anfíbios e répteis na Reserva Extrativista Chico Mendes, Acre, Brasil

Climatic variables and altitude as predictors of anuran species richness and number of reproductive modes in Brazil

Herpetofauna do Parque Natural Municipal de Sertão, Rio Grande do Sul, Brasil

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