气候变化领域集成服务门户(CCPortal): More than climate? Predictors of tree canopy height vary with scale in complex terrain, Sierra Nevada, CA (USA)

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DOI	10.1016/j.foreco.2018.12.006
	More than climate? Predictors of tree canopy height vary with scale in complex terrain, Sierra Nevada, CA (USA)
	Fricker G.A.; Synes N.W.; Serra-Diaz J.M.; North M.P.; Davis F.W.; Franklin J.
发表日期	2019
ISSN	0378-1127
起始页码	142
结束页码	153
卷号	434
英文摘要	Tall trees and vertical forest structure are associated with increased productivity, biomass and wildlife habitat quality. While climate has been widely hypothesized to control forest structure at broad scales, other variables could be key at fine scales, and are associated with forest management. In this study we identify the environmental conditions (climate, topography, soils) associated with increased tree height across spatial scales using airborne Light Detection and Ranging (LiDAR) data to measure canopy height. The study was conducted over a large elevational gradient from 200 to 3000 m in the Sierra Nevada Mountains (CA, USA) spanning sparse oak woodlands to closed canopy conifer forests. We developed Generalized Boosted Models (GBMs) of forest height, ranking predictor variable importance against Maximum Canopy Height (CHMax) at six spatial scales (25, 50, 100, 250, 500, 1000 m). In our study area, climate variables such as the climatic water deficit and mean annual precipitation were more strongly correlated with CHmax (18–52% relative importance) than soil and topographic variables, and models at intermediate (50–500 m) scales explained the most variance in CHMax (R2 0.77–0.83). Certain soil variables such as soil bulk density and pH, as well as topographic variables such as the topographic wetness index, slope curvature and potential solar radiation, showed consistent, strong associations with canopy structure across the gradient, but these relationships were scale dependent. Topography played a greater role in predicting forest structure at fine spatial scales, while climate variables dominated our models, particularly at coarse scales. Our results indicate that multiple abiotic factors are associated with increased maximum tree height; climatic water balance is most strongly associated with this component of forest structure but varies across all spatial scales examined (6.9–54.8% relative importance), while variables related to topography also explain variance in tree height across the elevational gradient, particularly at finer spatial scales (37.15%, 20.26% relative importance at 25, 50 m scales respectively). © 2018 Elsevier B.V.
英文关键词	Climate; Foothill oak woodland; LiDAR; Mixed-conifer forest; Soils; Topography; Tree height; Water-energy limitation
语种	英语
scopus关键词	Climate models; Climatology; Optical radar; Soils; Topography; Water resources; Climate; Foothill oak woodland; Mixed-conifer forests; Tree height; Water energy; Forestry; biomass; bulk density; climate change; complex terrain; coniferous forest; coniferous tree; environmental conditions; environmental factor; forest canopy; forest ecosystem; forest management; forest soil; lidar; precipitation (climatology); topography; water budget; woodland; Forestry; Meteorology; Topography; Tree Dimensions; Variables; Water Resources; California; Sierra Nevada [California]; United States; Coniferophyta
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/156221
作者单位	Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA 92507, United States; Social Sciences Department, California Polytechnic University, San Luis Obispo, CA 93407, United States; School of Geographical Sciences & Urban Planning, Arizona State University, P.O. Box 875302, Tempe, AZ 85287-5302, United States; UMR Silva, AgroParisTech, Université de Lorraine, INRA, Nancy, 54000, France; Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Ny Munkegade 114, Aarhus, DK-8000, Denmark; Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Ny Munkegade 114, Aarhus, DK-8000, Denmark; USFS Pacific Southwest Research Station, Davis, CA 95618, United States; Bren School of Environmental Science & Management, University of California, Santa Barbara, CA 93106, United States
推荐引用方式 GB/T 7714	Fricker G.A.,Synes N.W.,Serra-Diaz J.M.,et al. More than climate? Predictors of tree canopy height vary with scale in complex terrain, Sierra Nevada, CA (USA)[J],2019,434.
APA	Fricker G.A.,Synes N.W.,Serra-Diaz J.M.,North M.P.,Davis F.W.,&Franklin J..(2019).More than climate? Predictors of tree canopy height vary with scale in complex terrain, Sierra Nevada, CA (USA).Forest Ecology and Management,434.
MLA	Fricker G.A.,et al."More than climate? Predictors of tree canopy height vary with scale in complex terrain, Sierra Nevada, CA (USA)".Forest Ecology and Management 434(2019).