Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab6785 |
Monitoring pinyon-juniper cover and aboveground biomass across the Great Basin | |
Filippelli, Steven K.1; Falkowski, Michael J.1; Hudak, Andrew T.2; Fekety, Patrick A.1; Vogeler, Jody C.1; Khalyani, Azad Henareh3; Rau, Benjamin M.4; Strand, Eva K.5 | |
2020-02-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Since the mid-1800s pinyon-juniper (PJ) woodlands have been encroaching into sagebrush-steppe shrublands and grasslands such that they now comprise 40% of the total forest and woodland area of the Intermountain West of the United States. More recently, PJ ecosystems in select areas have experienced dramatic reductions in area and biomass due to extreme drought, wildfire, and management. Due to the vast area of PJ ecosystems, tracking these changes in woodland tree cover is essential for understanding their consequences for carbon accounting efforts, as well as ecosystem structure and functioning. Here we present a carbon monitoring, reporting, and verification (MRV) system for characterizing total aboveground biomass stocks and flux of PJ ecosystems across the Great Basin. This is achieved through a two-stage remote sensing approach by first using spatial wavelet analysis to rapidly sample tree cover from very high-resolution imagery (1m), and then training a Random Forest model which maps tree cover across the region from 2000 to 2016 using temporally-segmented Landsat spectral indices obtained from the LandTrendr algorithm in Google Earth Engine. Estimates of cover were validated against field data from the SageSTEP project (R-2 = 0.67, RMSE = 10% cover). Biomass estimated from cover-based allometry was higher than estimates from the Forest Inventory and Analysis Program (FIA) at the plot-level (bias = 5 Mg ha(-1) and RMSE = 15.5 Mg ha(-1)) due in part to differences in tree-level biomass allometrics. County-level aggregation of biomass closely matched estimates from the FIA (R-2 = 0.97) after correcting for bias at the plot level. Even after many previous decades of encroachment, we find forest area (i.e. areas with >= 10% cover) increasing at a steady rate of 0.46% per year, but 80% of the 9.86 Tg increase in biomass is attributable to infilling of existing forest. This suggests that the known consequences of encroachment such as reduced water availability, impacts to biodiversity, and risk of severe wildfire may have been increasing across the region in recent years despite the actions of sagebrush steppe restoration initiatives. |
英文关键词 | pinyon-juniper woodland aboveground biomass canopy cover encroachment Great Basin monitoring reporting and verification (MRV) |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000522237300001 |
WOS关键词 | WESTERN JUNIPER ; WATER AVAILABILITY ; CANOPY COVER ; TREE COVER ; ENCROACHMENT ; CARBON ; VEGETATION ; DISTURBANCE ; DYNAMICS ; NITROGEN |
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/279182 |
专题 | 气候变化 |
作者单位 | 1.Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA; 2.US Forest Serv, USDA, Rocky Mt Res Stn, Forestry Sci Lab, Moscow, ID 83843 USA; 3.Lincoln Univ, Dept Agr & Environm Sci, Jefferson City, MO 65101 USA; 4.USGS New England Water Sci Ctr, Northborough, MA 01532 USA; 5.Univ Idaho, Dept Forest Rangeland & Fire Sci, Moscow, ID 83844 USA |
推荐引用方式 GB/T 7714 | Filippelli, Steven K.,Falkowski, Michael J.,Hudak, Andrew T.,et al. Monitoring pinyon-juniper cover and aboveground biomass across the Great Basin[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(2). |
APA | Filippelli, Steven K..,Falkowski, Michael J..,Hudak, Andrew T..,Fekety, Patrick A..,Vogeler, Jody C..,...&Strand, Eva K..(2020).Monitoring pinyon-juniper cover and aboveground biomass across the Great Basin.ENVIRONMENTAL RESEARCH LETTERS,15(2). |
MLA | Filippelli, Steven K.,et al."Monitoring pinyon-juniper cover and aboveground biomass across the Great Basin".ENVIRONMENTAL RESEARCH LETTERS 15.2(2020). |
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