Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.09.019 |
Cover of tall trees best predicts California spotted owl habitat | |
North, Malcolm P.1,2; Kane, Jonathan T.3; Kane, Van R.3; Asner, Gregory P.4; Berigan, William5; Churchill, Derek J.3; Conway, Scott6; Gutierrez, R. J.5,7; Jeronimo, Sean3; Keane, John1; Koltunov, Alexander6,11; Mark, Tina8; Moskal, Monika3; Munton, Thomas9; Peery, Zachary5; Ramirez, Carlos6; Sollmann, Rahel10; White, Angela1; Whitmore, Sheila5 | |
2017-12-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 405 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Restoration of western dry forests in the USA often focuses on reducing fuel loads. In the range of the spotted owl, these treatments may reduce canopy cover and tree density, which could reduce preferred habitat conditions for the owl and other sensitive species. In particular, high canopy cover (>= 70%) has been widely reported to be an important feature of spotted owl habitat, but averages of stand-level forest cover do not provide important information on foliage height and gap structure. To provide better quantification of canopy structure, we used airborne LiDAR imagery to identify canopy cover in different height strata and the size and frequency of gaps that were associated with owl nest sites, protected activity centers (PACs), and territories within four study areas and 316 owl territories. Although total canopy cover was high in nest stands and PAC areas, the cover in tall ( > 48 m) trees was the canopy structure most highly selected for, while cover in lower strata (2-16 m) was avoided compared to availability in the surrounding landscape. Tall tree cover gradually decreased and lower strata cover increased as distance increased from the nest. Large ( > 1000 m(2)) gaps were not found near nests, but otherwise there was no difference in gap frequencies and sizes between PACs and territories and the surrounding landscape. Using cluster analysis we classified canopy conditions into 5 structural classes and 4 levels of canopy cover to assess the relationship between total canopy cover and tree size within nest sites, PACs, and territories. High canopy cover (>= 70%) mostly occurs when large tree cover is high, indicating the two variables are often confounded. Our results suggest that the cover of tall trees may be a better predictor of owl habitat than total canopy cover because the latter can include cover in the 2-16 m strata - conditions that owls actually avoid. Management strategies designed to preserve and facilitate the growth of tall trees while reducing the cover and density of understory trees may improve forest resilience to drought and wildfire while also maintaining or promoting the characteristics of owl habitat. |
英文关键词 | Canopy cover Fire suppression Forest gaps Mixed conifer |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413878500015 |
WOS关键词 | MIXED-CONIFER FORESTS ; NORTHERN FLYING SQUIRRELS ; SIERRA-NEVADA ; REPRODUCTIVE SUCCESS ; SPATIAL-PATTERNS ; FUEL REDUCTION ; CANOPY COVER ; HOME-RANGE ; TERRITORY OCCUPANCY ; FORAGING HABITAT |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
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/22694 |
专题 | 气候变化 |
作者单位 | 1.USFS PSW Res Stn, Davis, CA 95618 USA; 2.Univ Calif Davis, John Muir Inst, Davis, CA 95616 USA; 3.Univ Washington, Coll Environm, Seattle, WA 98195 USA; 4.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA 94305 USA; 5.Univ Wisconsin, Dept Forest & Wildlife Ecol, Madison, WI 53706 USA; 6.US Forest Serv, Reg Remote Sensing Lab 5, Mcclellan, CA 95652 USA; 7.Univ Minnesota, Dept Fisheries Wildlife & Conservat Biol, Minneapolis, MN 55455 USA; 8.Tahoe Natl Forest, Nevada City, CA 95959 USA; 9.USFS PSW Res Stn, Fresno, CA 93710 USA; 10.Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, Davis, CA 95616 USA; 11.Univ Calif Davis, Ctr Spatial Technol & Remote Sensing, Davis, CA 95616 USA |
推荐引用方式 GB/T 7714 | North, Malcolm P.,Kane, Jonathan T.,Kane, Van R.,et al. Cover of tall trees best predicts California spotted owl habitat[J]. FOREST ECOLOGY AND MANAGEMENT,2017,405. |
APA | North, Malcolm P..,Kane, Jonathan T..,Kane, Van R..,Asner, Gregory P..,Berigan, William.,...&Whitmore, Sheila.(2017).Cover of tall trees best predicts California spotted owl habitat.FOREST ECOLOGY AND MANAGEMENT,405. |
MLA | North, Malcolm P.,et al."Cover of tall trees best predicts California spotted owl habitat".FOREST ECOLOGY AND MANAGEMENT 405(2017). |
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