气候变化领域集成服务门户(CCPortal): Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling

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DOI	10.1007/s10533-020-00743-x
	Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling
	Durrer A.; Margenot A.J.; Silva L.C.R.; Bohannan B.J.M.; Nusslein K.; van Haren J.; Andreote F.D.; Parikh S.J.; Rodrigues J.L.M.
发表日期	2021
ISSN	1682563
起始页码	179
结束页码	194
卷号	152 期号:2021-02-03
英文摘要	It is well established that land use change (LUC) can impact soil organic carbon (SOC) in tropical regions, but the long-term effects of LUC on soil quality and C cycling remain unclear. Here, we evaluated how LUC affects soil C cycling in the Amazon region using a 100-year observational chronosequence spanning primary forest-to-pasture conversion and subsequent secondary forest succession. We found a surprising increase in topsoil SOC concentrations 60 years following conversion, despite major losses (> 85%) of forest-derived SOC within the first 25 years. Shifts in molecular composition of SOC, identified with diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, occurred in tandem with a significant decline in permanganate-oxidizable C (POXC) and β-glucosidase activity (per unit SOC), interpreted as a deceleration of soil C cycling after pasture grasses became the dominant source of C inputs to soil. Secondary forest succession caused rapid reversal to conditions observed under primary forest for β-glucosidase activity but not for SOC molecular composition (DRIFT spectroscopy), reflecting a long-lasting effect of LUC on soil C cycling. Our results show that rapid changes in the origin of SOC occur following deforestation with legacy effects on some indicators of C cycling (e.g. enzyme activity) but not others (e.g. molecular composition). This approach offers mechanistic understanding of LUC in the Amazon basin and can be used to help explain conflicting reports on how deforestation impacts SOC in the region. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.
英文关键词	Amazon; Permanganateoxidizable Carbon (POXC); Secondary forest; Soil organic carbon; β-glucosidase
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184632
作者单位	Department of Land, Air and Water Resources, University of California Davis, California, CA 95616, United States; Department of Soil Science, University of São Paulo, Piracicaba, 13418-900, Brazil; Department of Crop Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, United States; Environmental Studies Program. Department of Geography, Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, United States; Department of Biology, Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, United States; Department of Microbiology, University of Massachusetts, Amherst, MA, United States; Biosphere 2, University of Arizona, Tucson, AZ 85721, United States; Honors College, University of Arizona, Tucson, AZ 85721, United States; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Durrer A.,Margenot A.J.,Silva L.C.R.,et al. Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling[J],2021,152(2021-02-03).
APA	Durrer A..,Margenot A.J..,Silva L.C.R..,Bohannan B.J.M..,Nusslein K..,...&Rodrigues J.L.M..(2021).Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling.Biogeochemistry,152(2021-02-03).
MLA	Durrer A.,et al."Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling".Biogeochemistry 152.2021-02-03(2021).