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| DOI | 10.1093/jmammal/gyae011 |
| Range expansion of a declining forest species, the Western Gray Squirrel (Sciurus griseus), into semiarid woodland | |
| 发表日期 | 2024 |
| ISSN | 0022-2372 |
| EISSN | 1545-1542 |
| 起始页码 | 105 |
| 结束页码 | 2 |
| 卷号 | 105期号:2 |
| 英文摘要 | Globally, animals that are range-restricted are frequently becoming species of conservation concern, in part due to competitive exclusion by phylogenetically and ecologically similar species that are more tolerant of human disturbance. However, climate and land use changes to natural landscapes can create pockets of refugia for range-restricted species. Western gray squirrels (Sciurus griseus) are native to the west coast of North America, principally California and western Oregon. Over the past several decades, Western Gray Squirrel populations have declined in human-dominated areas, with increased competition from introduced congeneric species native to eastern North America cited as a primary driver. Despite declines in their established range west of the Pacific Crest in western North America, western gray squirrels are extending their range into the Great Basin, where they were not historically found. Using a network of remote camera traps deployed across the Sierra Nevada-Great Basin ecotone in northwestern Nevada, we detected western gray squirrels across 16 of 100 camera-trapping sites. The majority of detections were located in pinon-juniper woodland, a land cover type not previously occupied by this species. Occupancy modeling revealed that western gray squirrels were equally likely to occur in pinon-juniper woodland compared to mature pine forest that they occupy elsewhere in their range. A species distribution model parameterized with historical gray squirrel observations (pre-1950), indicated increased climatic suitability for the species on the eastern side of the Sierra Nevada in recent decades, which may have facilitated this range expansion. Our findings reveal the potential for species declining in their historical range to colonize novel habitats that become increasingly suitable as a result of human-driven changes to ecosystems. Species with limited ranges are declining globally. We documented a declining tree squirrel colonizing a habitat type the species did not previously occupy, possibly facilitated by climate change. This finding emphasizes the unexpected responses of species to global change. |
| 英文关键词 | camera trap; dynamic occupancy model; nonanalog community; pinon-juniper woodland; range expansion; species distribution model |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Zoology |
| WOS记录号 | WOS:001159353900001 |
| 来源期刊 | JOURNAL OF MAMMALOGY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/290954 |
| 作者单位 | University of Montana System; University of Montana; University of Oxford; University of Oxford |
| 推荐引用方式 GB/T 7714 | . Range expansion of a declining forest species, the Western Gray Squirrel (Sciurus griseus), into semiarid woodland[J],2024,105(2). |
| APA | (2024).Range expansion of a declining forest species, the Western Gray Squirrel (Sciurus griseus), into semiarid woodland.JOURNAL OF MAMMALOGY,105(2). |
| MLA | "Range expansion of a declining forest species, the Western Gray Squirrel (Sciurus griseus), into semiarid woodland".JOURNAL OF MAMMALOGY 105.2(2024). |
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