Drivers of peat accumulation rate in a raised bog : impact of drainage, climate, and local vegetation composition

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Stivrins , N , Ozola , I , Galka , M , Kuske , E , Alliksaar , T , Andersen , T J , Lamentowicz , M , Wulf , S & Reitalu , T 2017 , ' Drivers of peat accumulation rate in a raised bog : impact of drainage, climate, and local vegetation composition ' Mires and Peat , vol. 19 , 08 . DOI: 10.19189/MaP.2016.OMB.262

Title: Drivers of peat accumulation rate in a raised bog : impact of drainage, climate, and local vegetation composition
Author: Stivrins, N.; Ozola, I.; Galka, M.; Kuske, E.; Alliksaar, T.; Andersen, T. J.; Lamentowicz, M.; Wulf, S.; Reitalu, T.
Contributor: University of Helsinki, Department of Geosciences and Geography
Date: 2017
Language: eng
Number of pages: 19
Belongs to series: Mires and Peat
ISSN: 1819-754X
URI: http://hdl.handle.net/10138/208065
Abstract: We used variation partitioning to assess the relative importance of drainage, climate and local vegetation composition for the development of a raised bog. As a case study we selected Teici (Teici) Bog in Latvia (north-east Europe). Explanatory variables together explained 74 % of the variation in peat accumulation and only the residue of 26 % remained unexplained. Our study showed that the local vegetation composition and dominant Sphagnum species significantly influence peat accumulation rates. The results of linear models revealed that, under natural conditions, minor drainage and even strong drainage of the peat is associated with a positive growth balance of the system. However, drainage systems can have a measurable impact on peatland ecosystems situated farther away. Our study demonstrates that the average peat accumulation rate in Teici Bog over the last 150 years was 3.5 mm per year. Although the peat accumulation rate has been affected by drainage over the last half-century, it is still 2.8 mm per year. There was no strong correlation with the historical climate record, suggesting that the bog area has buffered the influence of climate change over the last 150 years.
Subject: chronology
macrofossils
testate amoebae
variation partitioning
water level reconstruction
MULTI-PROXY DATA
LATE HOLOCENE
HIGH-RESOLUTION
CARBON ACCUMULATION
ECOSYSTEM SERVICES
SPHAGNUM
DYNAMICS
AGE
SUCCESSION
HISTORY
1172 Environmental sciences
1181 Ecology, evolutionary biology
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