Plant functional type aboveground biomass change within Alaska and northwest Canada mapped using a 35-year satellite time series from 1985 to 2020
Plant functional type aboveground biomass change within Alaska and northwest Canada mapped using a 35-year satellite time series from 1985 to 2020
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使用 1985 年至 2020 年 35 年卫星时间序列绘制的阿拉斯加和加拿大西北部植物功能类型地上生物量变化
DOI:
10.1088/1748-9326/ac9d50
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发表时间:
2022
影响因子:
6.7
通讯作者:
Goetz, Scott J.
中科院分区:
文献类型:
--
作者:
Orndahl, Kathleen M.;Macander, Matthew J.;Berner, Logan T.;Goetz, Scott J.
Changes in vegetation distribution are underway in Arctic and boreal regions due to climate warming and associated fire disturbance. These changes have wide ranging downstream impacts—affecting wildlife habitat, nutrient cycling, climate feedbacks and fire regimes. It is thus critical to understand where these changes are occurring and what types of vegetation are affected, and to quantify the magnitude of the changes. In this study, we mapped live aboveground biomass for five common plant functional types (PFTs; deciduous shrubs, evergreen shrubs, forbs, graminoids and lichens) within Alaska and northwest Canada, every five years from 1985 to 2020. We employed a multi-scale approach, scaling from field harvest data and unmanned aerial vehicle-based biomass predictions to produce wall-to-wall maps based on climatological, topographic, phenological and Landsat spectral predictors. We found deciduous shrub and graminoid biomass were predicted best among PFTs. Our time-series analyses show increases in deciduous (37%) and evergreen shrub (7%) biomass, and decreases in graminoid (14%) and lichen (13%) biomass over a study area of approximately 500 000 km 2. Fire was an important driver of recent changes in the study area, with the largest changes in biomass associated with historic fire perimeters. Decreases in lichen and graminoid biomass often corresponded with increasing shrub biomass. These findings illustrate the driving trends in vegetation change within the Arctic/boreal region. Understanding these changes and the impacts they in turn will have on Arctic and boreal ecosystems will be critical to understanding the trajectory of climate change in the region.
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影响因子:
6.7
作者:
Macander, Matthew J.;Nelson, Peter R.;Goetz, Scott J.
通讯作者:
Goetz, Scott J.
影响因子:
6.7
作者:
P. Lafleur;E. Humphreys
通讯作者:
E. Humphreys
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Wenjun Chen;Wenqing Chen;Junhua Li;Yu Zhang;R. Fraser;I. Olthof;S. Leblanc;Z. Chen
通讯作者:
Z. Chen
影响因子:
5
作者:
Timm W. Nawrocki;Matthew L. Carlson;Jeanne L. D. Osnas;E. Jamie Trammell;Frank D. W. Witmer
通讯作者:
Frank D. W. Witmer
影响因子:
13.5
作者:
Gorelick, Noel;Hancher, Matt;Moore, Rebecca
通讯作者:
Moore, Rebecca