Abstract：
The increase in temperature caused by global climate change has promoted the salinization of wetlands. Inland saline-alkaline wetlands have an environment of over-humidity and shallow water and are hot spots for CH4 emissions. However, there are few reports on the effect of salinity on CH4 emissions in inland saline-alkaline wetlands. This study conducted simulation experiments of increased salinity to investigate the impact of salinity, habitat, and their interactions on CH4 emissions, as well as to examine the response of methanogenic archaea to salinity. Overall, salinity inhibited CH4 emissions. But there were different responses in the three habitat soils. Salinity decreased the relative abundance of methanogenic archaea and changed the community structure. In addition, salinity changed soil pH and dissolved organic carbon (DOC) and ammonium (NH4+) concentrations, which were significantly correlated with methanogenic archaea. Our study showed that salinity changed the soil physicochemical properties and characteristics of the methanogenic archaeal community, affecting CH4 emissions.
摘要：
全球气候变化引起的温度升高促进了湿地的盐渍化。内陆盐碱湿地环境过湿，浅水，是CH4排放的热点地区。然而,关于盐度对内陆盐碱湿地CH4排放的影响的报道很少。本研究进行了增加盐度的模拟实验，以研究盐度的影响，栖息地,以及它们对CH4排放的相互作用，以及检查产甲烷古菌对盐度的反应。总的来说,盐度抑制CH4排放。但是在三种栖息地土壤中存在不同的响应。盐度降低了产甲烷古菌的相对丰度，并改变了群落结构。此外,盐度改变了土壤pH值和溶解有机碳(DOC)和铵(NH4+)浓度，与产甲烷古菌显著相关。我们的研究表明，盐度改变了土壤理化性质和产甲烷古细菌群落的特征，影响CH4排放。
