globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.04.013
Scopus记录号: 2-s2.0-84982290239
论文题名:
Reconstruction of Holocene carbon dynamics in a large boreal peatland complex, southern Finland
作者: Mathijssen P.J.H.; Väliranta M.; Korrensalo A.; Alekseychik P.; Vesala T.; Rinne J.; Tuittila E.-S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 142
起始页码: 1
结束页码: 15
语种: 英语
英文关键词: Boreal peatland ; Carbon accumulation ; Holocene ; Lateral peatland expansion ; Methane flux ; Plant macrofossils
Scopus关键词: Dynamics ; Expansion ; Landforms ; Methane ; Peat ; Plant expansion ; Repair ; Vegetation ; Boreal peatlands ; Carbon accumulation ; Holocenes ; Methane fluxes ; Peatland ; Plant macrofossils ; Wetlands ; accumulation rate ; bog ; carbon ; climate forcing ; fen ; fossil record ; Holocene ; methane ; peatland ; plant ; reconstruction ; topography ; vegetation ; Finland
英文摘要: Holocene peatland development and associated carbon (C) dynamics were reconstructed for a southern boreal Finnish peatland complex with fen and bog areas. In order to assess the role of local factors and long-term allogenic climate forcing in peatland development patterns, we studied a total of 18 peat cores and reconstructed vertical peat growth and lateral peat area expansion rates, the C accumulation rate (CAR), past vegetation composition and past methane (CH4) fluxes. We combined fossil plant data with measured contemporary CH4 flux – vegetation relationship data to reconstruct CH4 fluxes over time. When these reconstructions were added to the CAR estimations, a more complete picture of Holocene-scale C dynamics was achieved. Basal peat ages showed that expansion of the peat area was rapid between 11,000 and 8000 cal. BP, but decreased during the dry mid-Holocene and is probably currently limited by basal topography. A similar pattern was observed for peat growth and CAR in the fen core, whereas in the bog core CAR increased after ombrotrophication, i.e. after 4400 cal. BP. The effect of fire on vegetation and CAR was more conspicuous at the bog site than at the fen site. The CH4 flux reconstructions showed that during the Holocene CH4 emissions at the fen site decreased from 19 ± 15 to 16 ± 8 g CH4 m−2 yr−1 and at the bog site from 20 ± 15 to 14 ± 8 g CH4 m−2 yr−1. Our results suggest that a combination of changing climate, fire events and local conditions have modified the autogenic peatland development and C dynamics. © 2016 Elsevier Ltd
资助项目: We are grateful to Antti Miettinen for peat sampling and laboratory work, to Henriikka Kivilä for sampling assistance and to David Wilson for revising the English text. Additionally, we are grateful for the constructive comments of two anonymous reviewers. Financial support was received from: the Academy of Finland (140863 ; 287039 ; Centre of Excellence: 118780 and 272041 ; Academy Professor projects: 1284701 and 1282842) ; University of Helsinki, research funding ; University of Eastern Finland, Faculty of Science and Forestry ; Finnish Cultural Foundation ; Integrated Carbon Observation System (ICOS-ERIC: 281250 ; ICOS-Finland: 281255) and CARBARC (285630) ; and the Nordic Centre of Excellence (DEFROST).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59731
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作者单位: Department of Environmental Sciences, University of Helsinki, Finland; School of Forest Sciences, Joensuu Campus, University of Eastern, Finland; Department of Physics, University of Helsinki, Finland; Department of Forest Sciences, University of Helsinki, Finland; Department of Geosciences and Geography, University of Helsinki, Finland

Recommended Citation:
Mathijssen P.J.H.,Väliranta M.,Korrensalo A.,et al. Reconstruction of Holocene carbon dynamics in a large boreal peatland complex, southern Finland[J]. Quaternary Science Reviews,2016-01-01,142
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