气候变化领域集成服务门户(CCPortal): Microsites and structures used by fishers (Pekania pennanti) in the southern Sierra Nevada: A comparison of forest elements used for daily resting relative to reproduction

CCPortal

DOI	10.1016/j.foreco.2019.02.042
	Microsites and structures used by fishers (Pekania pennanti) in the southern Sierra Nevada: A comparison of forest elements used for daily resting relative to reproduction
	Green R.E.; Purcell K.L.; Thompson C.M.; Kelt D.A.; Wittmer H.U.
发表日期	2019
ISSN	0378-1127
起始页码	131
结束页码	146
卷号	440
英文摘要	Many wildlife species rely on unique features of trees during daily activities and fundamental parts of their life cycle. The fisher (Pekania pennanti) is a forest-dwelling carnivore of conservation concern in western North America that uses unique habitat elements as refuges during resting bouts and for reproduction. Prior to this study, little was known about the fine-scale habitat used during reproduction at the southernmost extent of the fisher's range. Between 2007 and 2015, we attached radio-collars to 55 male and 72 female fishers in the southern Sierra Nevada and documented resting locations of males on 216 occasions (196 structures) and females on 824 occasions (737 structures). Beginning in 2008, we also monitored females over 8 reproductive seasons, confirming 45 females at dens and documenting 95 natal dens (83 structures) and 206 maternal dens (192 structures). We established 3 comparisons to guide our assessment of fine-scale habitat: resting males versus resting females, natal dens versus maternal dens, and resting fishers (both sexes) versus denning fishers (all dens). We expected the need for physical security and thermal protection in combination with morphology, predation risk, and aspects of reproductive ecology would influence patterns of use. Both sexes used a variety of microsites for resting, but females selected tree cavities most frequently (47%) while males used branch platforms most often (39%). For resting structures, live conifers were used most often by both sexes (males 44%, females 34%), but live hardwoods (males 16%, females 28%) and conifer snags (males 16%, females 22%) were also important. Comparing natal and maternal dens, we found that cavity microsites used early in the den season tended to be higher than those used later, and large live hardwoods comprised roughly half of all natal (46%) and maternal (51%) den structures. For resting versus denning, we found that large diameter hardwoods were an important source of cavities for both activities, live conifers used for denning were larger than those used for resting, and den structures tended to be on steeper slopes than rest structures. White fir (Abies concolor), California black oak (Quercus kelloggii), and ponderosa pine (Pinus ponderosa) were selected most often by both sexes for resting. In contrast, denning females relied on California black oak (55%), but also used white fir (24%) and incense cedar (Calocedrus decurrens; 12%). As noted in studies further north, our findings highlight the value of large trees with decay to support fisher reproduction and daily refugia. © 2019
英文关键词	Den; Fisher; Habitat; Pekania pennanti; Reproduction; Rest; Sierra Nevada
语种	英语
scopus关键词	Ecosystems; Hardwoods; Fisher; Habitat; Pekania pennanti; Reproduction; Rest; Sierra Nevada; Forestry; breeding population; comparative study; coniferous tree; conservation status; den; diameter; habitat structure; morphotype; mustelid; natal dispersal; population structure; predation risk; reproduction; site selection; treehole; Abies Concolor; Ecosystems; Forestry; Hardwoods; Quercus Kelloggii; Reproduction; Structures; Trees; California; Sierra Nevada [California]; United States; Abies concolor; Abies grandis; Calocedrus decurrens; Coniferophyta; Pinus ponderosa; Quercus kelloggii
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156067
作者单位	USDA Forest Service, Pacific Southwest Research Station, 2081 E Sierra Ave, Fresno, CA 93710, United States; USDA Forest Service, Region 1, 24 Fort Missoula, Missoula, MT 59804, United States; Graduate Group in Ecology and Department of Wildlife, Fish, and Conservation Biology, 1081 Academic Surge, University of California, One Shields Ave, Davis, CA 95616, United States; School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand
推荐引用方式 GB/T 7714	Green R.E.,Purcell K.L.,Thompson C.M.,et al. Microsites and structures used by fishers (Pekania pennanti) in the southern Sierra Nevada: A comparison of forest elements used for daily resting relative to reproduction[J],2019,440.
APA	Green R.E.,Purcell K.L.,Thompson C.M.,Kelt D.A.,&Wittmer H.U..(2019).Microsites and structures used by fishers (Pekania pennanti) in the southern Sierra Nevada: A comparison of forest elements used for daily resting relative to reproduction.Forest Ecology and Management,440.
MLA	Green R.E.,et al."Microsites and structures used by fishers (Pekania pennanti) in the southern Sierra Nevada: A comparison of forest elements used for daily resting relative to reproduction".Forest Ecology and Management 440(2019).