Hydrology-driven ecosystem respiration determines the carbon balance of a boreal peatland.
Hydrology-driven ecosystem respiration determines the carbon balance of a boreal peatland.
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水文驱动的生态系统呼吸决定了北方泥炭地的碳平衡
DOI：
10.1016/j.scitotenv.2013.06.077
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Wilmking
中科院分区：
文献类型：
--
作者：
Gazovic;Forbrich;Kutzbach;M. Wilmking
北方泥炭地的碳平衡主要是CO2、CH 4和溶解有机碳（DOC）三种碳通量的总和。这些通量的年内和年际动态差异控制类似的因素，如温度和地下水位。年内和年间不同的气候条件可能导致各通量对净生态系统生产力（NEP）的绝对和相对贡献不同。在这项研究中，CO2通量测量在芬兰东部的北方泥炭地在干旱年（2006年）和湿润年（2007年），并结合DOC和CH 4通量从同一网站。CO2吸收在丰水年比在干旱年高65%，造成较高的地下水位（WT），随后降低土壤呼吸速率。丰水年DOC和CH 4通量增加2 - 3倍并不能完全抵消当年较高的CO2吸收，导致干年NEP为− 83.7 ± 14 g C m− 2，丰水年为− 134.5 ± 21 g C m− 2。因此，在我们的研究中，WT被确定为最重要的因素，负责在所观察到的年份之间的碳平衡的变化。
The carbon (C) balance of boreal peatlands is mainly the sum of three different C fluxes: carbon dioxide (CO2), methane (CH4) and dissolved organic carbon (DOC). Intra- and inter-annual dynamics of these fluxes are differentially controlled by similar factors, such as temperature and water-table. Different climatic conditions within and between years might thus result in varying absolute and relative contributions of each flux to net ecosystem productivity (NEP). In this study CO2fluxes were measured at a boreal peatland in eastern Finland during a dry year (2006) and a wet year (2007) and combined with DOC and CH4fluxes from the same site. CO2uptake in the wet year was 65% higher than in the dry year, caused by higher water table (WT) and subsequently reduced rates of soil respiration. Two to three-fold increases in DOC and CH4fluxes in the wet year did not completely offset the higher CO2uptake in that year, resulting in NEP of − 83.7 ± 14 g C m− 2in the dry and − 134.5 ± 21 g C m− 2in the wet year. Thus, in our study, WT was identified as the most important factor responsible for variations in the C balance between the observed years.
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影响因子：
4.9
作者：
E. Golovatskaya;E. Dyukarev
通讯作者：
E. Golovatskaya;E. Dyukarev
影响因子：
4.9
作者：
Becker;Kutzbach;Forbrich;Schneider;M. Wilmking
通讯作者：
M. Wilmking
影响因子：
6.2
作者：
Forbrich, Inke;Kutzbach, Lars;Wilmking, Martin
通讯作者：
Wilmking, Martin
影响因子：
64.8
作者：
Freeman, C;Fenner, N;Hudson, J
通讯作者：
Hudson, J