气候变化领域集成服务门户(CCPortal): Lichen cover mapping for caribou ranges in interior Alaska and Yukon

CCPortal

DOI	10.1088/1748-9326/ab6d38
	Lichen cover mapping for caribou ranges in interior Alaska and Yukon
	MacAnder M.J.; Palm E.C.; Frost G.V.; Herriges J.D.; Nelson P.R.; Roland C.; Russell K.L.M.; Suitor M.J.; Bentzen T.W.; Joly K.; Goetz S.J.; Hebblewhite M.
发表日期	2020
ISSN	17489318
卷号	15 期号:5
英文摘要	Previous research indicates that the effects of climate warming, including shrub expansion and increased fire frequency may lead to declining lichen abundance in arctic tundra and northern alpine areas. Lichens are important forage for caribou (Rangifer tarandus), whose populations are declining throughout most of North America. To clarify how lichen cover might affect caribou resource selection, ecologists require better data on the spatial distribution and abundance of lichen. Here, we use a combination of field data and satellite imagery to model lichen cover for a 583 200 km2 area that fully encompasses nine caribou ranges in interior Alaska and Yukon. We aggregated data from in situ vegetation plots, aerial survey polygons and unmanned aerial vehicle (UAV) imagery to align with 30 m resolution Landsat pixels. We used these data to train a random forest model with a suite of environmental and spectral predictors to estimate lichen cover. We validated our lichen cover model using reserved training data and existing external datasets, and found that reserved data from aerial survey polygons (R 2 = 0.77) and UAV imagery (R 2 = 0.71) provided the best fit. We used our lichen cover map to evaluate the influence of estimated lichen cover on caribou resource selection in the Fortymile Herd from 2012 to 2018 during summer and winter. In both seasons, caribou avoided lichen-poor areas (0%-5% lichen cover) and showed stronger selection as lichen cover increased to ∼30%, above which selection leveled off. Our results suggest that terrestrial lichen cover is an important factor influencing caribou resource selection in northern boreal forests across seasons. Our lichen cover map goes beyond existing maps of lichen abundance and distribution because it incorporates extensive field data for model training and validation and estimates lichen cover over a much larger spatial extent. We expect our landscape-scale map will be useful for understanding trends in lichen abundance and distribution, as well as for caribou research, management and conservation. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	arctic boreal vulnerability experiment; caribou; climate change; fire; lichen; remotesensing; shrubs
语种	英语
scopus关键词	Antennas; Arctic vehicles; Decision trees; Forestry; Population distribution; Satellite imagery; Surveys; Unmanned aerial vehicles (UAV); Aggregated datum; Climate warming; Fire frequencies; Landscape scale; Management and conservations; Random forest modeling; Resource selection; Vegetation plots; Fungi; abundance estimation; aerial survey; forage; Landsat; lichen; pixel; remotely operated vehicle; satellite imagery; spatial distribution; tundra; Alaska; Canada; Cariboo Mountains; Columbia Mountains; United States; Yukon Territory; Rangifer tarandus
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154036
作者单位	ABR Inc.-Environmental Research and Services, Fairbanks, AK 99708, United States; W A Franke College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States; Bureau of Land Management, Fairbanks, AK 99709, United States; University of Maine-Fort Kent, Fort Kent, ME 04743, United States; National Park Service, Fairbanks, AK 99709, United States; Department of Environment, Yukon Government, Whitehorse, YT Y1A 4Y9, Canada; Department of Environment, Yukon Government, Dawson City, YT Y0B 1G0, Canada; Alaska Department of Fish and Game, Fairbanks, AK 99701, United States; School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ 86011-5693, United States
推荐引用方式 GB/T 7714	MacAnder M.J.,Palm E.C.,Frost G.V.,et al. Lichen cover mapping for caribou ranges in interior Alaska and Yukon[J],2020,15(5).
APA	MacAnder M.J..,Palm E.C..,Frost G.V..,Herriges J.D..,Nelson P.R..,...&Hebblewhite M..(2020).Lichen cover mapping for caribou ranges in interior Alaska and Yukon.Environmental Research Letters,15(5).
MLA	MacAnder M.J.,et al."Lichen cover mapping for caribou ranges in interior Alaska and Yukon".Environmental Research Letters 15.5(2020).