Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab6d38 |
Lichen cover mapping for caribou ranges in interior Alaska and Yukon | |
Macander, Matthew J.1; Palm, Eric C.2; Frost, Gerald, V1; Herriges, Jim D.3; Nelson, Peter R.4; Roland, Carl5; Russell, Kelsey L. M.6; Suitor, Mike J.7; Bentzen, Torsten W.8; Joly, Kyle5; Goetz, Scott J.9; Hebblewhite, Mark2 | |
2020-05-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
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 km(2) 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 similar 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. |
英文关键词 | arctic boreal vulnerability experiment caribou climate change fire lichen remote sensing shrubs |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529892300001 |
WOS关键词 | HABITAT SELECTION ; WOODLAND CARIBOU ; ARCTIC TUNDRA ; FIRE REGIME ; RESOLUTION ; ABUNDANCE ; REINDEER ; IMPACTS ; DECLINE ; DIETS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279318 |
专题 | 气候变化 |
作者单位 | 1.ABR Inc, Environm Res & Serv, Fairbanks, AK 99708 USA; 2.Univ Montana, WA Franke Coll Forestry & Conservat, Missoula, MT 59812 USA; 3.Bur Land Management, Fairbanks, AK 99709 USA; 4.Univ Maine Ft Kent, Ft Kent, ME 04743 USA; 5.Natl Pk Serv, Fairbanks, AK 99709 USA; 6.Yukon Govt, Dept Environm, Whitehorse, YT Y1A 4Y9, Canada; 7.Yukon Govt, Dept Environm, Dawson City, YT Y0B 1G0, Canada; 8.Alaska Dept Fish & Game, Fairbanks, AK 99701 USA; 9.No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ 86011 USA |
推荐引用方式 GB/T 7714 | Macander, Matthew J.,Palm, Eric C.,Frost, Gerald, V,et al. Lichen cover mapping for caribou ranges in interior Alaska and Yukon[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(5). |
APA | Macander, Matthew J..,Palm, Eric C..,Frost, Gerald, V.,Herriges, Jim D..,Nelson, Peter R..,...&Hebblewhite, Mark.(2020).Lichen cover mapping for caribou ranges in interior Alaska and Yukon.ENVIRONMENTAL RESEARCH LETTERS,15(5). |
MLA | Macander, Matthew J.,et al."Lichen cover mapping for caribou ranges in interior Alaska and Yukon".ENVIRONMENTAL RESEARCH LETTERS 15.5(2020). |
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