【2h】

In the line of fire: the peatlands of Southeast Asia

机译:在火线上:东南亚的泥炭地

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摘要

Peatlands are a significant component of the global carbon (C) cycle, yet despite their role as a long-term C sink throughout the Holocene, they are increasingly vulnerable to destabilization. Nowhere is this shift from sink to source happening more rapidly than in Southeast Asia, and nowhere else are the combined pressures of land-use change and fire on peatland ecosystem C dynamics more evident nor the consequences more apparent. This review focuses on the peatlands of this region, tracing the link between deforestation and drainage and accelerating C emissions arising from peat mineralization and fire. It focuses on the implications of the recent increase in fire occurrence for air quality, human health, ecosystem resilience and the global C cycle. The scale and controls on peat-driven C emissions are addressed, noting that although fires cause large, temporary peaks in C flux to the atmosphere, year-round emissions from peat mineralization are of a similar magnitude. The review concludes by advocating land management options to reduce future fire risk as part of wider peatland management strategies, while also proposing that this region's peat fire dynamic could become increasingly relevant to northern peatlands in a warming world.This article is part of the themed issue ‘The interaction of fire and mankind’.
机译:泥炭地是全球碳(C)循环的重要组成部分,尽管泥炭地是整个全新世的长期碳汇,但它们越来越容易受到破坏。从汇到源的这种转变比在东南亚发生的更快,在土地利用变化和火灾对泥炭地生态系统碳动力学的综合压力下,也没有更明显的后果。这篇综述的重点是该地区的泥炭地,追溯了森林砍伐与排水之间的联系以及泥炭矿化和火灾引起的加速碳排放。它着眼于最近发生的火灾对空气质量,人类健康,生态系统复原力和全球碳循环的影响。指出了泥炭驱动的C排放的规模和控制措施,并指出,尽管大火导致向大气的C通量出现较大的暂时峰值,但泥炭矿化的全年排放量具有相似的水平。审查的最后是倡导土地管理方案,以减少未来的火灾风险,这是更广泛的泥炭地管理策略的一部分,同时还建议该地区的泥炭火灾动态可能与变暖世界中的北部泥炭地越来越相关。本文是主题问题的一部分“火与人类的相互作用”。

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