Remote sensing of forest die-off in the Anthropocene: From plant ecophysiology to canopy structure
Remote sensing of forest die-off in the Anthropocene: From plant ecophysiology to canopy structure
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DOI：
10.1016/j.rse.2019.111233
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发表时间：
2019-09
影响因子：
13.5
通讯作者：
Cho‐ying Huang;W. Anderegg;G. Asner
中科院分区：
文献类型：
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作者：
Cho‐ying Huang;W. Anderegg;G. Asner
人类活动从根本上改变了地球的气候和陆地表面在后半个世纪，导致了一个新的地质时代的建议被称为人类世。在人类世的过去几十年中，一个主要的生态扰动是树木和灌木的大量死亡，或森林死亡，由气温升高和长期干旱，和/或昆虫和病原体爆发引发。这种日益普遍的干扰影响了所有植被大陆上的森林和林地，并可能改变生物圈中的陆地碳通量。遥感使人们能够绘制树木损失和损害的程度和生态模式，评估潜在的碳排放量，监测树木死亡后的生态系统轨迹。在这篇综述文章中，我们涵盖了干旱引起的植物生理，化学和结构的变化，发生作为一个单独的树从健康的进展，强调站死或粗木质残体，并在遥感数据提供的机会和潜力，在大空间尺度和早期检测的观察和分析相应的反应。与树木死亡率和遥感相关的变化之间的联系表明，随着气候模型预测未来几十年气候变暖和干燥，战略性和适应性自然资源管理有着特殊的前景。
Human activities have fundamentally changed Earth's climate and land surface in the latter half of the 20th century, leading to the proposal of a new geologic epoch known as the Anthropocene. One major ecological perturbation underway over the past several decades of the Anthropocene is extensive tree and shrub mortality, or forest die-off, triggered by elevated temperatures and prolonged drought, and/or insect and pathogen outbreaks. This increasingly common disturbance has affected forests and woodlands on all vegetated continents and may alter terrestrial carbon fluxes in the biosphere. Remote sensing has enabled mapping of the extent and ecological patterns of tree loss and damage, assessing potential carbon emissions and monitoring ecosystem trajectories after tree mortality. In this review article, we cover drought-induced changes in plant physiology, chemistry, and structure that occur as an individual tree progresses from healthy to stressed to standing dead or coarse woody debris, and corresponding responses in remotely sensed data that provide the opportunity and potential for observation and analysis at large spatial scales and early detection. The linkages between changes associated with tree mortality and remote sensing show exceptional promise for strategic and adaptive natural resource management as climate models project warmer and drier climates in the coming decades.