Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
Environ Sci Pollut Res Int. 2023 Oct;30(48):106378-106389. doi: 10.1007/s11356-023-29922-7. Epub 2023 Sep 20.
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 CH emissions. However, there are few reports on the effect of salinity on CH 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 CH emissions, as well as to examine the response of methanogenic archaea to salinity. Overall, salinity inhibited CH 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 (NH) 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 CH emissions.
全球气候变化引起的温度升高促进了湿地的盐碱化。内陆盐碱湿地具有高湿度和浅水的环境，是 CH 排放的热点地区。然而，关于盐碱化对内陆盐碱湿地 CH 排放的影响的报道很少。本研究进行了增加盐分的模拟实验，以研究盐分、生境及其相互作用对 CH 排放的影响，并研究产甲烷古菌对盐分的响应。总的来说，盐分抑制了 CH 的排放。但在三种生境土壤中存在不同的反应。盐分降低了产甲烷古菌的相对丰度并改变了群落结构。此外，盐分改变了土壤 pH 值以及溶解有机碳 (DOC) 和铵 (NH₄) 的浓度，这与产甲烷古菌呈显著相关。我们的研究表明，盐分改变了土壤理化性质和产甲烷古菌群落的特征，从而影响了 CH 的排放。
