文章基本信息

标题：Can boreal peatlands with pools be net sinks for CO2?
本地全文：下载
作者：Luc Pelletier ; Ian B Strachan ; Nigel T Roulet 等
期刊名称：Environmental Research Letters
印刷版ISSN：1748-9326
电子版ISSN：1748-9326
出版年度：2015
卷号：10
期号：3
页码：035002
DOI：10.1088/1748-9326/10/3/035002
语种：English
出版社：IOP Publishing Ltd
摘要：Peatland open-water pools, a common feature on temperate to subarctic peatlands, are sources of carbon (C) to the atmosphere but their contribution to the net ecosystem carbon dioxide exchange (NEE-CO₂) is poorly known; there is a question as to whether peatlands with pools are smaller sinks of atmospheric C, or even C-neutral, compared to other peatlands. We present growing season NEE-CO₂ measurements using the eddy covariance technique in a peatland with pools. We found the maximum photosynthetic uptake and ecosystem respiration rates at 10 °C to be in the lower range of the published data. The lower total vegetation biomass, due to the presence of pools, reduced CO₂ uptake during day and the autotrophic component of ecosystem respiration. The low CO₂ uptake combined with reduced CO₂ loss resulted in the site being a net sink for CO₂ of a similar magnitude as other northern peatlands despite the inclusion of pools.