气候变化领域集成服务门户(CCPortal): Patterns and drivers of development in a west Amazonian peatland during the late Holocene

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DOI	10.1016/j.quascirev.2020.106168
	Patterns and drivers of development in a west Amazonian peatland during the late Holocene
	Kelly T.J.; Lawson I.T.; Roucoux K.H.; Baker T.R.; Honorio Coronado E.N.
发表日期	2020
ISSN	0277-3791
卷号	230
英文摘要	Amazonian peatlands sequester and store large amounts of carbon below ground and contribute to regional biodiversity. They also present an outstanding opportunity for palaeoecological research. This study uses multiple peat cores to improve our understanding of the long-term development of a peatland (Quistococha) in Peruvian Amazonia, by providing a reconstruction of the spatial patterns of vegetation change and peat accumulation over time across the site. Peat cores taken along transects totalling c. 5 km were used to establish the peat thickness and visible stratigraphy. Of 29 new peat cores, four were selected for pollen analysis, supported by 15 radiocarbon dates. These complement two existing published pollen records from the site, from a peat core and a lake sediment core. Our study shows that peat initiation occurred across the site in the form of primary mire formation between 2400 and 1900 cal yr BP. Following peat initiation, five broadly similar phases of vegetation development are recorded in all the pollen sequences: Amazon floodplain, herbaceous sedge fen, mixed angiosperm flooded forest, mixed palm swamp, Mauritia-dominated palm swamp. In detail, there are differences in the pattern and timing of vegetation change between the sequences. Much of this spatial variation is likely to be the result of the underlying substrate topography. In addition, we find that the difference in vegetation composition between core sites was greater during the early stages of peat accumulation at Quistococha than it is today. Such spatial and temporal variability has significant implications for computer modelling of carbon accumulation in tropical peatlands and, consequently, our understanding of their role in the global carbon cycle. Our findings highlight key challenges for numerical modelling on Holocene timescales, namely the difficulty in quantifying long-term variations in primary productivity, the variable influence of sediment input on carbon accumulation during the early stages of peatland formation, and the difficulty of modelling water tables in sites with variable underlying topography. © 2020 Elsevier Ltd
英文关键词	Mire formation; Palaeoecology; Palynology; Peru; Vegetation succession
语种	英语
scopus关键词	Biodiversity; Carbon; Floods; Groundwater; Stratigraphy; Topography; Vegetation; Wetlands; Mire formation; Palaeoecology; Palynology; Peru; Vegetation successions; Peat; biodiversity; carbon sequestration; Holocene; lacustrine deposit; mire; paleoecology; palynology; peatland; radiocarbon dating; reconstruction; sediment core; sequence stratigraphy; spatial variation; succession; Amazonia; Loreto; Peru; Peru; Quistococha; Magnoliophyta; Mauritia (angiosperm)
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151590
作者单位	Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom; School of Geography and Sustainable Development, University of St Andrews, Irvine Building, North Street, St Andrews, KY16 9AJ, United Kingdom; School of Geography, University of Leeds, Leeds, LS2 9JT, United Kingdom; Instituto de Investigaciones de la Amazonía Peruana, Iquitos, Av. José A. Quiñones km. 2.5 - Apartado Postal 784, Loreto, Peru
推荐引用方式 GB/T 7714	Kelly T.J.,Lawson I.T.,Roucoux K.H.,et al. Patterns and drivers of development in a west Amazonian peatland during the late Holocene[J],2020,230.
APA	Kelly T.J.,Lawson I.T.,Roucoux K.H.,Baker T.R.,&Honorio Coronado E.N..(2020).Patterns and drivers of development in a west Amazonian peatland during the late Holocene.Quaternary Science Reviews,230.
MLA	Kelly T.J.,et al."Patterns and drivers of development in a west Amazonian peatland during the late Holocene".Quaternary Science Reviews 230(2020).