Global nitrogen input on wetland ecosystem: The driving mechanism of soil labile carbon and nitrogen on greenhouse gas emissions.
Global nitrogen input on wetland ecosystem: The driving mechanism of soil labile carbon and nitrogen on greenhouse gas emissions.
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湿地生态系统的全球氮输入：土壤活性碳和氮对温室气体排放的驱动机制
DOI：
10.1016/j.ese.2020.100063
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发表时间：
2020-10
影响因子：
12.6
通讯作者：
Chen, Yi
中科院分区：
文献类型：
--
作者：
Chen, Mengli;Chang, Lian;Zhang, Junmao;Guo, Fucheng;Vymazal, Jan;He, Qiang;Chen, Yi
全球氮素输入改变了湿地土壤碳氮循环速率，显著促进了湿地温室气体的排放，而土壤活性碳氮则对湿地温室气体排放有显著影响。然而，在全球氮输入下，土壤不稳定碳和氮影响湿地生态系统温室气体排放的驱动机制尚不清楚。研究氮素输入对湿地温室气体排放的驱动因子对减少氮素输入引起的全球变暖具有重要意义。因此，我们综合了72项已发表的温室气体通量和土壤不稳定碳和氮化合物（铵，硝酸盐，溶解有机碳，土壤微生物生物量氮和碳）的研究（2144配对观测），以了解全球氮输入下不稳定碳和氮对温室气体排放的影响。在整个数据集中，氮输入显着促进了湿地二氧化碳，甲烷和一氧化二氮的排放。特别是，在较低的氮水平（<100公斤公顷·年）和添加铵化合物，淡水湿地显着促进二氧化碳和甲烷的排放。泥炭地是最大的一氧化二氮源在这些条件下。氮输入促进了湿地生态系统中溶解有机碳、铵态氮、硝酸盐、微生物量碳和微生物量氮的积累。利用变异分配分析和结构方程模型进一步分析了温室气体与活性碳、氮的关系。结果表明，在全球氮输入条件下，溶解有机碳（DOC）是湿地温室气体排放的主要驱动因子，而微生物生物量碳（MBC）对温室气体排放的影响比其他活性碳和氮更直接。湿地温室气体排放主要由全球氮输入下的DOC驱动。湿地的温室气体排放直接受全球氮输入下的MBC驱动。NH 4 +-N的添加量低于100 kg ha−1·yr−1时，会显著促进湿地温室气体排放。淡水湿地是全球氮输入下最大的CO2和CH 4源。氮素输入对泥炭地N2 O排放有显著促进作用。
Greenhouse gas emissions from wetlands are significantly promoted by global nitrogen input for changing the rate of soil carbon and nitrogen cycling, and are substantially affected by soil labile carbon and nitrogen conversely. However, the driving mechanism by which soil labile carbon and nitrogen affect greenhouse gas emissions from wetland ecosystems under global nitrogen input is not well understood. Working out the driving factor of nitrogen input on greenhouse gas emissions from wetlands is critical to reducing global warming from nitrogen input. Thus, we synthesized 72 published studies (2144 paired observations) of greenhouse gas fluxes and soil labile compounds of carbon and nitrogen (ammonium, nitrate, dissolved organic carbon, soil microbial biomass nitrogen and carbon), to understand the effects of labile carbon and nitrogen on greenhouse gas emissions under global nitrogen input. Across the data set, nitrogen input significantly promoted carbon dioxide, methane and nitrous oxide emissions from wetlands. In particular, at lower nitrogen rates (<100 kg ha−1·yr−1) and with added ammonium compounds, freshwater wetland significantly promoted carbon dioxide and methane emissions. Peatland was the largest nitrous oxide source under these conditions. This meta-analysis also revealed that nitrogen input stimulated dissolved organic carbon, ammonium, nitrate, microbial biomass carbon and microbial biomass nitrogen accumulation in the wetland ecosystem. The variation-partitioning analysis and structural equation model were used to analyze the relationship between the greenhouse gas and labile carbon and nitrogen further. These results revealed that dissolved organic carbon (DOC) is the primary factor driving greenhouse gas emission from wetlands under global nitrogen input, whereas microbial biomass carbon (MBC) more directly affects greenhouse gas emission than other labile carbon and nitrogen. GHG emissions from wetlands is mainly driven by DOC under global nitrogen input. GHG emissions from wetlands is directly driven by MBC under global nitrogen input. Adding NH4+-N lower than 100 kg ha−1·yr−1 greatly promote GHG emissions from wetland. Freshwater wetlands are the largest CO2 and CH4 source under global nitrogen input. Nitrogen input to peatland greatly and significantly promotes N2O emission.
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模型处理湿地中氯仿的转化：从质量平衡到微生物分析
影响因子：
11.4
作者：
Chen, Yi;Wen, Yue;Kuschk, Peter
通讯作者：
Kuschk, Peter
影响因子：
9.7
作者：
Chowdhury, Nasrin;Marschner, Petra;Burns, Richard G.
通讯作者：
Burns, Richard G.
中国东北北方泥炭地冻融过程中高水平硝态氮添加下的快速 N2O 通量
影响因子：
5
作者：
Cui, Qian;Song, Changchun;Guo, Yuedong
通讯作者：
Guo, Yuedong
影响因子：
11.6
作者：
Deng, Lei;Huang, Chunbo;Peng, Changhui
通讯作者：
Peng, Changhui
DOI：
10.1007/bf00045199
发表时间：
1995-06-01
期刊：
VEGETATIO
影响因子：
--
作者：
FINLAYSON, CM;VANDERVALK, AG
通讯作者：
VANDERVALK, AG