气候变化领域集成服务门户(CCPortal): Towards mapping the diversity of canopy structure from space with GEDI

CCPortal

DOI	10.1088/1748-9326/ab9e99
	Towards mapping the diversity of canopy structure from space with GEDI
	Schneider F.D.; Ferraz A.; Hancock S.; Duncanson L.I.; Dubayah R.O.; Pavlick R.P.; Schimel D.S.
发表日期	2020
ISSN	17489318
卷号	15 期号:11
英文摘要	Plant biodiversity supports life on Earth and provides a range of important ecosystem services, but is under severe pressure by global change. Structural diversity plays a crucial role for carbon, water and energy cycles and animal habitats. However, it is very difficult to map and monitor over large areas, limiting our ability to assess the status of biodiversity and predict change. NASA’s Global Ecosystem Dynamics Investigation (GEDI) provides a new opportunity to measure 3D plant canopy structure of the world’s temperate, Mediterranean and tropical ecosystems, but its potential to map structural diversity is not yet tested. Here, we use wall-to-wall airborne laser scanning (ALS) to simulate GEDI data (GEDIsim) over 7380 km2 in the southern Sierra Nevada mountains in California and evaluate how well GEDI’s sampling scheme captures patterns of structural diversity. We evaluate functional richness and functional beta diversity in a biodiversity hot spot. GEDIsim performed well for trait retrievals (r2 = 0.68) and functional richness mapping (r2 = 0.75) compared to ALS retrievals, despite lower correlations in complex terrain with steep slopes. Functional richness patterns were strongly associated with soil organic carbon stocks and density as well as variables related to water availability and could be appropriately mapped by GEDIsim with and without cloud cover. Functional beta diversity was more strongly related to local changes in topography and more challenging to map, especially with decreasing sampling density. The reduced number of GEDIsim shots when simulating cloud cover lead to a strong overestimation of beta diversity and a reduction of r2 from 0.64 to 0.40 compared to ALS. The ability to map functional richness has been demonstrated with potential application at continental scales that could be transformative for our understanding of large-scale patterns of plant canopy structure, diversity and potential links to animal diversity, movement and habitats. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	ALS; Biodiversity; Functional traits; Remote sensing; Spaceborne lidar
语种	英语
scopus关键词	Animals; Biodiversity; Mapping; NASA; Organic carbon; Topography; Airborne Laser scanning; Ecosystem dynamics; Sampling densities; Soil organic Carbon stocks; Southern sierra nevada; Structural diversity; Tropical ecosystems; Water availability; Ecosystems; biodiversity; canopy architecture; carbon sink; cloud cover; complex terrain; ecosystem service; mapping method; satellite data; species diversity; species richness; California; Sierra Nevada [California]; United States; Matthiola; Varanidae
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/153539
作者单位	Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, United States; Institute of the Environment and Sustainability, University of California, Los Angeles, CA90095, United States; Institute of Geography, University of Edinburgh, Alexander Crum Brown Road, Edinburgh, EH9 3FF, United Kingdom; Department of Geographical Sciences, University of Maryland, 7251 Preinkert Drive, College Park, MD 20742, United States
推荐引用方式 GB/T 7714	Schneider F.D.,Ferraz A.,Hancock S.,et al. Towards mapping the diversity of canopy structure from space with GEDI[J],2020,15(11).
APA	Schneider F.D..,Ferraz A..,Hancock S..,Duncanson L.I..,Dubayah R.O..,...&Schimel D.S..(2020).Towards mapping the diversity of canopy structure from space with GEDI.Environmental Research Letters,15(11).
MLA	Schneider F.D.,et al."Towards mapping the diversity of canopy structure from space with GEDI".Environmental Research Letters 15.11(2020).