Vegetation controls methane emissions in a coastal brackish fen
Vegetation controls methane emissions in a coastal brackish fen
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植被控制沿海咸湿沼泽的甲烷排放
DOI：
10.1007/s11273-013-9304-8
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发表时间：
2013
影响因子：
1.8
通讯作者：
Jurasinski G
中科院分区：
文献类型：
--
作者：
Koebsch F;Glatzel S;Jurasinski G
气候变化和相关的海平面上升可能会影响沿海生态系统，并导致更频繁的洪水泛滥。植物是泥炭地甲烷(CH4)排放的重要控制因素，因为活着的植物的新陈代谢可以增加或减少CH4的排放，而植物凋落物为产甲烷提供了一个容易获得的碳源。在这里，我们比较了在德国东北部波罗的海南部海岸退化的、潮湿的沿海半咸水沼泽中，各种优势植物物种对甲烷排放的贡献。我们分析了在不同单一优势植被林(BolBoschoenus maritimus(L.))的测点上收集的一年两周一次的静态封闭舱数据。Palla、塔贝纳蒙塔尼舍诺普特斯(Schoenopectus tabernaemontani(C.C.Gmel.)Palla、尖叶苔草Carex acutiformisEhrh.)此外，还记录了水位、水温、电导率(硫酸盐)和几个泥炭特性的数据。总体而言，甲烷年排放量较低，各植被林平均为14千克CH4ha−1a−1，这与排水后泥炭的高度分解和夏季相对较低的水位有关。然而，不同植被类型的甲烷排放是不同的，其甲烷排放通量(31.8万±15.7万kg CH4ha−1a−1)显著高于尖叶苔草和黄褐天牛(分别为4.3h±1.2h和5.7m±2.4g/kg CH4ha−1a−1)。所有已被记录的环境变量都不能解释这种差异。因此，植被组成似乎是沿海微咸水沼泽甲烷排放的一个重要驱动因素，因此可能对娱乐措施至关重要。
Climate change and associated sea level rise will likely affect coastal ecosystems and lead to more frequent inundations. Plants are an important control for methane (CH4) emissions in peatlands because the metabolism of the living plant can either enhance or attenuate CH4emissions and plant litter supplies an easily available carbon source for methanogenesis. Here we compare the contribution of various dominant plant species to methane emissions in a degraded, rewetted coastal brackish fen at the southern Baltic Sea coast in Northeast Germany. We analyse one year of bi-weekly static closed chamber data gathered at measurement spots that were located in different mono-dominant vegetation stands (Bolboschoenus maritimus(L.) Palla,Schoenoplectus tabernaemontani(C.C.Gmel.) Palla,Carex acutiformisEhrh.). Furthermore, data on water level, water temperature, conductivity (sulphate), and several peat characteristics were recorded. Generally, the annual methane emissions were low with an average across vegetation stands of 14 kg CH4ha−1a−1, which we related to high decomposition of peat after drainage and to relatively low water levels in summer. Nevertheless, methane emissions varied between different vegetation types with significantly higher methane fluxes (31.8 ± 5.7 kg CH4ha−1a−1) fromBolboschoenus maritimusstands compared toCarex acutiformisandSchoenoplectus tabernaemontanistands (4.3 ± 1.2 and 5.7 ± 2.4 kg CH4ha−1a−1, respectively). None of the environmental variables that have been recorded can explain this difference. Thus, vegetation composition seems to be an important driver for methane emissions in coastal brackish fens and may therefore be crucial with regard to recreation measures.
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德国西南部湿地土壤的甲烷排放
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
M. Sommer;S. Fiedler
通讯作者：
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影响因子：
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作者：
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通讯作者：
A. Freibauer
影响因子：
3.2
作者：
David Wilson;J. Alm;J. Laine;K. Byrne;E. Farrell;E. Tuittila
通讯作者：
David Wilson;J. Alm;J. Laine;K. Byrne;E. Farrell;E. Tuittila
影响因子：
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作者：
BUBIER, JL
通讯作者：
BUBIER, JL
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DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
M. Marinier;S. Glatzel;T. Moore
通讯作者：
T. Moore