globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13950
Scopus记录号: 2-s2.0-85037364953
论文题名:
Ecosystem state shifts during long-term development of an Amazonian peatland
作者: Swindles G.T.; Morris P.J.; Whitney B.; Galloway J.M.; Gałka M.; Gallego-Sala A.; Macumber A.L.; Mullan D.; Smith M.W.; Amesbury M.J.; Roland T.P.; Sanei H.; Patterson R.T.; Sanderson N.; Parry L.; Charman D.J.; Lopez O.; Valderamma E.; Watson E.J.; Ivanovic R.F.; Valdes P.J.; Turner T.E.; Lähteenoja O.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:2
起始页码: 738
结束页码: 757
语种: 英语
英文关键词: Amazon rainforest ; carbon accumulation ; climate ; Holocene ; palaeoecology ; peat ; Peru ; swamp ; tropical peatland
Scopus关键词: accumulation ; ecosystem response ; Holocene ; paleoclimate ; paleoecology ; paleoproductivity ; peatland ; primary production ; rainforest ; swamp ; tropical region ; Amazonia ; Peru
英文摘要: The most carbon (C)-dense ecosystems of Amazonia are areas characterized by the presence of peatlands. However, Amazonian peatland ecosystems are poorly understood and are threatened by human activities. Here, we present an investigation into long-term ecohydrological controls on C accumulation in an Amazonian peat dome. This site is the oldest peatland yet discovered in Amazonia (peat initiation ca. 8.9 ka BP), and developed in three stages: (i) peat initiated in an abandoned river channel with open water and aquatic plants; (ii) inundated forest swamp; and (iii) raised peat dome (since ca. 3.9 ka BP). Local burning occurred at least three times in the past 4,500 years. Two phases of particularly rapid C accumulation (ca. 6.6–6.1 and ca. 4.9–3.9 ka BP), potentially resulting from increased net primary productivity, were seemingly driven by drier conditions associated with widespread drought events. The association of drought phases with major ecosystem state shifts (open water wetland–forest swamp–peat dome) suggests a potential climatic control on the developmental trajectory of this tropical peatland. A third drought phase centred on ca. 1.8–1.1 ka BP led to markedly reduced C accumulation and potentially a hiatus during the peat dome stage. Our results suggest that future droughts may lead to phases of rapid C accumulation in some inundated tropical peat swamps, although this can lead ultimately to a shift to ombrotrophy and a subsequent return to slower C accumulation. Conversely, in ombrotrophic peat domes, droughts may lead to reduced C accumulation or even net loss of peat. Increased surface wetness at our site in recent decades may reflect a shift towards a wetter climate in western Amazonia. Amazonian peatlands represent important carbon stores and habitats, and are important archives of past climatic and ecological information. They should form key foci for conservation efforts. © 2017 The Authors. Global Change Biology Published by John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110559
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: School of Geography, University of Leeds, Leeds, United Kingdom; Department of Geography and Environmental Science, Northumbria University, Newcastle upon Tyne, United Kingdom; Geological Survey of Canada / Commission géologique du Canada, Calgary, Canada & Department of Geoscience, University of Calgary, Calgary, AB, Canada; Department of Biogeography and Palaeoecology, Adam Mickiewicz University, Poznań, Poland; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; School of Natural and Built Environment, Queen's University Belfast, Belfast, United Kingdom; Ottawa-Carleton Geoscience Center and Department of Earth Sciences, Carleton University, Ottawa, ON, Canada; School of Interdisciplinary Studies, University of Glasgow, Glasgow, United Kingdom; Panama Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Panamá & Smithsonian Tropical Research Institute, Panama City, Panama; Facultad de Biologia, Universidad Nacional de la Amazonia Peruana, Pevas 5ta cdra, Iquitos, Peru; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; School of Life Sciences, Arizona State University, Tempe, AZ, United States

Recommended Citation:
Swindles G.T.,Morris P.J.,Whitney B.,et al. Ecosystem state shifts during long-term development of an Amazonian peatland[J]. Global Change Biology,2018-01-01,24(2)
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