气候变化领域集成服务门户(CCPortal): Human and climate global-scale imprint on sediment transfer during the Holocene

CCPortal

DOI	10.1073/pnas.1908179116
	Human and climate global-scale imprint on sediment transfer during the Holocene
	Jenny J.-P.; Koirala S.; Gregory-Eaves I.; Francus P.; Niemann C.; Ahrens B.; Brovkin V.; Baud A.; Ojala A.E.K.; Normandeau A.; Zolitschka B.; Carvalhais N.
发表日期	2019
ISSN	0027-8424
起始页码	22972
结束页码	22976
卷号	116 期号:46
英文摘要	Accelerated soil erosion has become a pervasive feature on landscapes around the world and is recognized to have substantial implications for land productivity, downstream water quality, and biogeochemical cycles. However, the scarcity of global syntheses that consider long-term processes has limited our understanding of the timing, the amplitude, and the extent of soil erosion over millennial time scales. As such, we lack the ability to make predictions about the responses of soil erosion to long-term climate and land cover changes. Here, we reconstruct sedimentation rates for 632 lakes based on chronologies constrained by 3,980 calibrated 14C ages to assess the relative changes in lake-watershed erosion rates over the last 12,000 y. Estimated soil erosion dynamics were then complemented with land cover reconstructions inferred from 43,669 pollen samples and with climate time series from the Max Planck Institute Earth System Model. Our results show that a significant portion of the Earth surface shifted to human-driven soil erosion rate already 4,000 y ago. In particular, inferred soil erosion rates increased in 35% of the watersheds, and most of these sites showed a decrease in the proportion of arboreal pollen, which would be expected with land clearance. Further analysis revealed that land cover change was the main driver of inferred soil erosion in 70% of all studied watersheds. This study suggests that soil erosion has been altering terrestrial and aquatic ecosystems for millennia, leading to carbon (C) losses that could have ultimately induced feed-backs on the climate system. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	14C ages; Global soil erosion; Lake records; Pollens; Varved sediments
语种	英语
scopus关键词	carbon 14; carbon; aquatic environment; Article; climate change; controlled study; deforestation; Holocene; human; land use; priority journal; sedimentation; soil erosion; watershed; chemistry; climate; ecology; ecosystem; history; human activities; lake; pollen; sediment; soil; Carbon Isotopes; Climate; Ecology; Ecosystem; Geologic Sediments; History, Ancient; Human Activities; Humans; Lakes; Pollen; Soil
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160333
作者单位	Jenny, J.-P., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany, Unité Mixte de Recherche (UMR42), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA), Université Savoie Mont Blanc, Chambéry, 73000, France; Koirala, S., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Gregory-Eaves, I., Department of Biology, McGill University, Montréal, QC H3A 1B1, Canada; Francus, P., Centre-EAU Terre Environnement, Institut National de la Recherche Scientifique (INRS)QC G1K 9A9, Canada, Centre de Recherche sur la Dynamique du Système Terre (GEOTOP), Université du Québec, Montréal, QC H3C 3P8, Canada; Niemann, C., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Ahrens, B., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germa...
推荐引用方式 GB/T 7714	Jenny J.-P.,Koirala S.,Gregory-Eaves I.,et al. Human and climate global-scale imprint on sediment transfer during the Holocene[J],2019,116(46).
APA	Jenny J.-P..,Koirala S..,Gregory-Eaves I..,Francus P..,Niemann C..,...&Carvalhais N..(2019).Human and climate global-scale imprint on sediment transfer during the Holocene.Proceedings of the National Academy of Sciences of the United States of America,116(46).
MLA	Jenny J.-P.,et al."Human and climate global-scale imprint on sediment transfer during the Holocene".Proceedings of the National Academy of Sciences of the United States of America 116.46(2019).