Site-specific and seasonal variation in habitat use of Eurasian otters ( Lutralutra) in western China: implications for conservation.
Site-specific and seasonal variation in habitat use of Eurasian otters ( Lutralutra) in western China: implications for conservation.
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中国西部欧亚水獭（Lutra Iutra）栖息地利用的特定地点和季节变化：对保护的影响
DOI：
10.24272/j.issn.2095-8137.2021.238
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发表时间：
2021-11-18
影响因子：
4.9
通讯作者：
Zhang L
中科院分区：
文献类型：
--
作者：
Wang QY;Zheng KD;Han XS;He F;Zhao X;Fan PF;Zhang L
作为顶级捕食者，欧亚水獭（Lutra lutra）是健康淡水生态系统的指标，也是保护的旗舰物种。该物种曾经在中国广泛分布，现在主要分布在中国西部的大河上游。然而，对当地水獭种群的缺乏了解仍然阻碍着中国水獭的保护。本文采用样带调查方法，对中国西部玉树市和唐家河国家级自然保护区的水獭栖息地利用进行了详细研究。在这两个研究地点，水獭更喜欢在靠近或突出河流的大岩石上排便，并且在水线以上约50厘米。在玉树市中心城区5 km的河岸段沿着未发现水獭活动，水獭活动的地点主要集中在自然河岸、河岸带和人口密度较低的地方。但在唐家河，这种格局并不明显，河流改造和人为干扰较小。在两个季节，水獭河的使用强度与玉树的海拔和人口密度呈负相关。春季唐家河水獭河利用强度与猎物量、流量呈正相关，与人口数量呈负相关;秋季水獭河利用强度与人口数量呈正相关，与流量呈负相关。这些结果反映了灵活的栖息地利用策略的水獭在不同的网站，强调有必要研究水獭生活在不同的地区和栖息地类型。我们提出了河流改造的建议，并呼吁更多的特定地点的研究，以促进水獭保护在中国。
As a top predator, the Eurasian otter (Lutra lutra) is an indicator of healthy freshwater ecosystems and a flagship species for conservation. Once widespread in China, the species is now distributed mainly in the upper reaches of the great rivers of western China. However, a lack of knowledge on local otter populations continues to hinder their conservation in China. Here, we conducted a detailed study on habitat use of Eurasian otters in Yushu City and Tangjiahe National Nature Reserve in western China using transect surveys. At both study sites, otters preferred to defecate on large rocks close to or protruding from the river and about 50 cm above the waterline. In Yushu, no spraints were found along the 5 km river bank section in the downtown area, with otters preferring sprainting sites with natural banks, riparian zones, and lower human population density. However, this pattern was not obvious at Tangjiahe, where river transformation and human disturbance are minor. Otter river use intensity was negatively correlated with elevation and human population density in Yushu in both seasons. In Tangjiahe, otter river use intensity was positively correlated with prey mass and flow rate and negatively correlated with human population in spring, but positively correlated with human population and negatively correlated with flow rate in autumn. These results reflect the flexible habitat use strategies of otters at different sites, underlining the necessity to study otters living in different regions and habitat types. We provide suggestions for river modification and call for more site-specific studies to promote otter conservation in China.
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影响因子：
56.9
作者：
Bruner, AG;Gullison, RE;da Fonseca, GAB
通讯作者：
da Fonseca, GAB
影响因子：
3.4
作者：
Cianfrani, C.;Maiorano, L.;Guisan, A.
通讯作者：
Guisan, A.
影响因子：
3.9
作者：
Clavero, Miguel;Hermoso, Virgilio;Delibes, Miguel
通讯作者：
Delibes, Miguel
影响因子：
2.3
作者：
Depue, John E.;Ben-David, Merav
通讯作者：
Ben-David, Merav
影响因子：
8.7
作者：
Fabrizio, Mauro;Di Febbraro, Mirko;Loy, Anna
通讯作者：
Loy, Anna