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Sustainability assessment of a lizard assemblage in Pernambuco state, Brazil
Journal for Nature Conservation ( IF 2.2 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.jnc.2021.125957
Paulo Eduardo Silva Bezerra , Francisco Marcante Santana , Geraldo Jorge Barbosa de Moura

Several species of lizards are disappearing around the world. Their populations are declining on a global scale and for carrying out conservation actions, it is necessary to identify the real risks of extinction and the threats that affect the species. Alternative methodologies that are commonly applied and also the use of different approaches are important tools to fill gaps concerning various threats and vulnerabilities of the species. The aim of this study was to test the effectiveness of the “Stobutzki sustainability” method in assessing the degree of vulnerability to extinction of lizards with occurrence registered in Pernambuco, Brazil. 41 species were evaluated by using the “Stobutzki sustainability” method, based on scoring and ranking. The analysis was made from a graphical representation of the factors of "Threats" and "Vulnerabilities" of lizards. The great majority of the species (n = 30) has not shown to be vulnerable. Only 11 lizards were not considered sustainable. The lizards Nothobachia ablephara, Cercosaura ocellata, and Procellosaurinus erythrocercus demonstrated a very high degree of vulnerability to extinction. The gymnophtalmidae family was the least sustainable. A total of 16 threats of anthropogenic origin for the populations of lizards in Pernambuco were detected. Half of the species of lizards (n = 21) have a low number of embryos per litter (<3). Additionaly, this group was considered partially generalist, having an occurrence extension smaller than 40,000 km² and measurements between 100 and 300 mm in total length. Among the top 10 in our Vulnerability Ranking there are six lizards included in threat categories on the list of the Regional Environment Agency of Pernambuco. The "Vulnerabilities" axis was ordered by the fecundity of the species, their distribution and preference for certain microhabitats. Furthermore, for the "Threats" axis, the structuring was based on the situation of the habitats of these species and their distribution in protected areas. The strongest biological predictors of extinction risk for lizards of Pernambuco state were litter size, microenvironmental specificity, and the extent of occurrence. The “Stobutzki Sustainability” method is an important tool to assist the evaluation of vulnerability to extinction in lizard species, as well as the criteria used for researches on other lizard assemblages.



中文翻译:

巴西伯南布哥州蜥蜴组合的可持续性评估

几种蜥蜴在世界范围内正在消失。其种群正在全球范围内减少,为了开展保护行动,有必要确定灭绝的真正风险和影响物种的威胁。常用的替代方法以及使用不同的方法是填补有关物种各种威胁和脆弱性的空白的重要工具。这项研究的目的是测试“ Stobutzki可持续性”方法在评估巴西伯南布哥州发生蜥蜴灭绝的脆弱性程度方面的有效性。根据得分和排名,使用“ Stobutzki可持续性”方法对41个物种进行了评估。该分析是通过对“威胁”和“诺氏毛虫,小尾虫红球菌表现出极高的灭绝脆弱性。tal科家族的可持续性最差。在伯南布哥州总共发现了16种人为威胁的蜥蜴种群。蜥蜴的一半(n = 21)每窝的胚数很少(<3)。另外,这组人被认为是部分通才,发生范围小于40,000km²,总长度在100至300 mm之间。在我们的漏洞排名前十名中,伯南布哥州区域环境局列出了六种蜥蜴,它们属于威胁类别。“漏洞”轴由物种的繁殖力,它们的分布和对某些微生境的偏好决定。此外,对于“威胁”轴,结构是根据这些物种的栖息地状况及其在保护区中的分布而定的。伯南布哥州蜥蜴灭绝风险的最强生物学预测指标是产仔数,微环境特异性和发生程度。“ Stobutzki可持续性”方法是协助评估蜥蜴物种灭绝脆弱性以及其他蜥蜴组合研究标准的重要工具。

更新日期:2021-01-29
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