Habitat use by the island lemurs of Nosy Be, Madagascar
Habitat use by the island lemurs of Nosy Be, Madagascar
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DOI：
10.1002/ajp.23362
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发表时间：
2022-01
影响因子：
2.4
通讯作者：
J. Tinsman;Sylviane Volampeno;Jessica Ganas-Swaray;D. Gann;Natacha Andrianirina;M. Chamizo;Claude J. Ralazampirenena;J. Ranaivoarisoa;Hasina Ravaoarisoa;Josie Rivero;A. Zamora;Cristina M Gomes
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文献类型：
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作者：
J. Tinsman;Sylviane Volampeno;Jessica Ganas-Swaray;D. Gann;Natacha Andrianirina;M. Chamizo;Claude J. Ralazampirenena;J. Ranaivoarisoa;Hasina Ravaoarisoa;Josie Rivero;A. Zamora;Cristina M Gomes
马达加斯加的狐猴受到森林丧失、碎片化和退化的威胁。许多物种使用灵活的行为在退化的栖息地中生存，但它们在非常小的区域坚持的能力可能是有限的。岛上的狐猴，就像在马达加斯加西北海岸外的诺西贝岛上发现的狐猴，面临着种群突然减少和灭绝的高风险。Nosy Be是两个极度濒危物种的家园--特有的Nosy Be运动狐猴(Lepemur Tymerlachsoni)和克莱尔的老鼠狐猴(Microcebus Mamiatra)-以及濒危黑狐猴(Eulemur Macaco)。诺西贝岛上剩余的大部分森林都受到占地862公顷的洛科贝国家公园的保护。为了记录Nosy Be狐猴如何利用它们有限的栖息地，我们对洛科贝及其周围的53个样带进行了植被和勘测调查。我们收集了248次狐猴目击事件的树木大小、树冠盖度、林下能见度和海拔等数据。我们使用一个空间上明确的多物种占有率模型来研究哪些森林结构变量对狐猴来说是重要的。我们的结果代表了一些关于岛上狐猴栖息地利用的第一批数据。黑狐猴喜欢更大的树和林下植被不那么茂密的地区。即使考虑到抽样工作和地理位置，在洛科贝国家公园以外发生的情况也明显减少。游动狐猴和老鼠狐猴的分布与我们记录的森林结构变量无关，但它们确实对彼此做出了负面预测--可能是因为它们对栖息地的要求不同。这些结果还强调了国家公园对保护诺西贝上的黑狐猴种群的重要性，并提出了什么因素确实会影响诺西贝较小狐猴的分布的问题。需要密切监测，以防止这些种群及其提供的生态系统服务消失，其他岛屿狐猴也是如此。
Madagascar's lemurs are threatened by forest loss, fragmentation, and degradation. Many species use flexible behaviors to survive in degraded habitat, but their ability to persist in very small areas may be limited. Insular lemurs, like those found on Nosy Be, an island off the northwestern coast of Madagascar, are at heightened risk of sudden population declines and extirpation. Nosy Be is home to two Critically Endangered species—the endemic Nosy Be sportive lemur (Lepilemur tymerlachsoni) and Claire's mouse lemur (Microcebus mamiratra)—as well as the Endangered black lemur (Eulemur macaco). Most of the remaining forest on Nosy Be is protected by the 862‐ha Lokobe National Park. To document how Nosy Be lemurs use their restricted habitat, we conducted vegetation and reconnaissance surveys on 53 transects in and around Lokobe. We collected data on tree size, canopy cover, understory visibility, and elevation for 248 lemur sightings. We used a spatially explicit, multi‐species occupancy model to investigate which forest‐structure variables are important to lemurs. Our results represent some of the first data on habitat use by insular lemurs. Black lemurs preferred significantly larger trees and areas with less dense understory. They also occurred significantly less outside of Lokobe National Park, even when accounting for sampling effort and geography. The distributions of the sportive and mouse lemurs were not related to the forest structure variables we documented, but they did negatively predict each other—perhaps because their habitat requirements differ. These results also underscore the importance of the national park to protecting the black lemur population on Nosy Be and raise questions about what factors do influence the distribution of Nosy Be's smaller lemurs. Close monitoring is needed to prevent these populations and the ecosystem services they provide from disappearing, as have other island lemurs.