气候变化领域集成服务门户(CCPortal): The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil

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DOI	10.1111/gcb.17265
	The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil
	Mayer, Allegra C.; McFarlane, Karis J.; Silver, Whendee L.
发表日期	2024
ISSN	1354-1013
EISSN	1365-2486
起始页码	30
结束页码	4
卷号	30 期号:4
英文摘要	Increasing hurricane frequency and intensity with climate change is likely to affect soil organic carbon (C) stocks in tropical forests. We examined the cycling of C between soil pools and with depth at the Luquillo Experimental Forest in Puerto Rico in soils over a 30-year period that spanned repeated hurricanes. We used a nonlinear matrix model of soil C pools and fluxes (soilR) and constrained the parameters with soil and litter survey data. Soil chemistry and stable and radiocarbon isotopes were measured from three soil depths across a topographic gradient in 1988 and 2018. Our results suggest that pulses and subsequent reduction of inputs caused by severe hurricanes in 1989, 1998, and two in 2017 led to faster mean transit times of soil C in 0-10 cm and 35-60 cm depths relative to a modeled control soil with constant inputs over the 30-year period. Between 1988 and 2018, the occluded C stock increased and delta C-13 in all pools decreased, while changes in particulate and mineral-associated C were undetectable. The differences between 1988 and 2018 suggest that hurricane disturbance results in a dilution of the occluded light C pool with an influx of young, debris-deposited C, and possible microbial scavenging of old and young C in the particulate and mineral-associated pools. These effects led to a younger total soil C pool with faster mean transit times. Our results suggest that the increasing frequency of intense hurricanes will speed up rates of C cycling in tropical forests, making soil C more sensitive to future tropical forest stressors.
英文关键词	C-14; Hurricane Hugo; Hurricane Maria; Luquillo Experimental Forest; radiocarbon; soil carbon age; transit times
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:001208991400005
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302831
作者单位	University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Livermore National Laboratory; United States Department of Energy (DOE); Lawrence Livermore National Laboratory
推荐引用方式 GB/T 7714	Mayer, Allegra C.,McFarlane, Karis J.,Silver, Whendee L.. The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil[J],2024,30(4).
APA	Mayer, Allegra C.,McFarlane, Karis J.,&Silver, Whendee L..(2024).The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil.GLOBAL CHANGE BIOLOGY,30(4).
MLA	Mayer, Allegra C.,et al."The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil".GLOBAL CHANGE BIOLOGY 30.4(2024).