Anurans from preserved and disturbed areas of Atlantic Forest in the region of Etá Farm, municipality of Sete Barras, state of São Paulo, Brazil

Abstract: We provide information on the diversity and natural history of anurans from preserved and disturbed habitats in the region of Etá Farm, municipality of Sete Barras, state of São Paulo, Brazil. The region is covered by rainforest and plantations of banana and peach palm. From April, 2013 to March, 2014 we sampled amphibians mainly with pitfall traps with drift fences and visual and auditory surveys. A total of 9813 individuals of 36 species of anurans from nine families were recorded in this study. A larger number of species was found in forests (29 species), followed by peach palm plantations (21 species), and banana plantations (17 species). The areas of peach palm plantation and forests showed the greatest similarity in species composition. The vegetation type with the highest number of exclusive species was the forest, whereas only four species were exclusive of the peach palm plantation, and none was exclusive of the banana plantation. Species accumulation curves indicated that our sampling effort was not enough to sample all the species that occur in the region. Our results reinforce the importance of forested habitats for the maintenance of anuran diversity in the Atlantic forest. The preservation of large fragments of forest in the region of Etá Farm is necessary to preserve the diverse amphibian fauna of this region.

摘要：本研究针对巴西圣保罗州塞特巴拉斯市埃塔农场区域内的受保护与受干扰生境，开展无尾两栖类（Anurans）多样性及自然史相关信息的采集工作。该区域植被覆盖类型包括雨林、香蕉种植园与桃棕种植园。2013年4月至2014年3月期间，研究团队主要采用漂移围栏诱捕陷阱、目视调查及鸣声调查三种方式进行两栖类采样。本研究共记录到隶属于9科的36种无尾两栖类，总计9813个个体。其中森林生境检出的物种数量最多（29种），其次为桃棕种植园（21种）与香蕉种植园（17种）。桃棕种植园与森林生境的物种组成相似度最高。专属物种数量方面，森林生境拥有最多的专属物种，桃棕种植园仅存4种专属物种，而香蕉种植园无专属物种。物种累积曲线分析结果表明，本次采样努力尚未覆盖区域内所有分布物种。本研究结果进一步证实了森林生境对大西洋森林（Atlantic Forest）无尾两栖类多样性维持的重要性，指出埃塔农场区域需保留大面积森林片段，以保护该区域多样的两栖动物区系。