Short-term effect of restoration on vegetation change and methane emissions from peatlands drained for forestry in southern Finland
Short-term effect of restoration on vegetation change and methane emissions from peatlands drained for forestry in southern Finland
复制标题
恢复对芬兰南部林业泥炭地植被变化和甲烷排放的短期影响
DOI：
10.1139/x98-011
复制
发表时间：
1998
影响因子：
2.2
通讯作者：
J. Laine
中科院分区：
文献类型：
--
作者：
Veli;H. Nykänen;P. Martikainen;J. Laine
用静态箱技术测量了芬兰南部一个微营养沼泽和一个富营养沼泽固定样地的甲烷(CH4)通量。沼泽湿地甲烷排放量从0.1g·m-2·a-1增加到2.1g·m-2·a-1，沼泽湿地从0.8g·m-2·a-1增加到4.6g·m-2·a-1，但仍保持在较低的水平。沼泽地的排放与棉草的短期演替有关。排放具有很高的时空变异性，在沼泽地的排放峰值较高。测量季节(5月底至9月底)排放量的时间波动与泥炭温度相关，而季节通量则取决于不同微站点的水分状况。
Methane (CH4) fluxes from fixed sample plots in a minerotrophic fen and an ombrotrophic bog in southern Finland were measured by using a static chamber technique 1 year before and 2 years after a rewetting treatment. Methane emissions rose with rising water table after rewetting from 0.1 to 2.1 g ·m-2 ·a-1 at the fen site and from 0.8 to 4.6 g ·m-2 ·a-1 at the bog site but remained at a lower level than emissions from similar pristine site types. At the fen site the emissions were related to the short-term succession of cottongrass (Eriophorum vaginatum L.). Emissions showed high spatial and temporal variation with high emission peaks at the bog site. Temporal fluctuation of the emissions during the measurement season (from the end of May to the end of September) was correlated with peat temperature, while the seasonal fluxes were dependent on the moisture conditions in different microsites.