黄河三角洲典型滨海盐沼湿地土壤CO_(2)和CH_(4)排放对水盐变化的响应

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	黄河三角洲典型滨海盐沼湿地土壤CO_(2)和CH_(4)排放对水盐变化的响应
	李雪 1,2,4; 董杰 1; 韩广轩 2,3; 张奇奇 2; 谢宝华 2,3; 李培广 2,3; 赵明亮 2,3; 陈克龙 4; 宋维民 2,3
刊名	植物生态学报
	2023
卷号	47 期号:3 页码:434-446
关键词	土壤含水量盐度土壤碳矿化滨海盐沼湿地黄河三角洲蓝碳
ISSN号	1005-264X
其他题名	Response of soil CO_2 and CH_4 emissions to changes in moisture and salinity at a typical coastal salt marsh of Yellow River Delta
文献子类	期刊论文
英文摘要	Aims Globally, coastal salt marshes have been considered as major blue carbon sinks and contributors for climate change mitigation. Understanding the effects of soil moisture and salinity on soil CO_2 and CH_4 emissions will advance better understand of long-term storage of soil carbon in coastal salt marshes. Methods We conducted a simulation experiment with a gradient of water treatments (25%, 50%, 75% and 100% soil saturated water content) and salt treatments (9 g·kg~(-1) and 18 g·kg~(-1)). And we investigated soil carbon mineralization rates, soil properties, microbial biomass and community structure of typical salt marsh soils in the Yellow River Delta. Important findings We found that: (1) There was no interaction between soil moisture and salinity content on soil CO_2, CH_4 emissions and CH_4:CO_2, and soil CO_2 emissions showed a unimodal curve along the soil moisture gradients and a significant decrease with increasing soil salinity content. The increased soil moisture significantly promoted soil CH_4 emissions, but the increased soil salinity content significantly inhibited soil CH_4 emissions. (2) There was a weak significant interaction between moisture and salinity content on dissolved organic carbon (DOC). Under low water treatment, DOC content decreased with increasing soil salinity content, but increased under high water treatment. There was a significant positive relationship between soil CO_2 emissions and DOC content. (3) Soil microbial biomass exhibited a trend of first increasing and then decreasing with the increasing soil moisture, while soil salinity content significantly decreased microbial biomass. There was a significant positive correlation of microbial biomass with CO_2 and CH_4 emissions. (4) Both soil moisture and salinity treatments modified soil microbial community structure. Soil moisture and salinity treatments significantly increased and decreased the number of bacteria and alpha diversity index, respectively. Both soil CO_2 and CH_4 emissions were positively correlated with the number of bacteria and alpha diversity index. The climate is gradually drying and warming in this region due to climate change. Therefore, we speculated that changes in microbial biomass and community structure, soil moisture and salinity content may have potentially profound effects on the carbon-sink function at coastal salt marsh.
语种	中文
CSCD记录号	CSCD:7473319
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/34265]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.聊城大学地理与环境学院,山东聊城252000; 2.中国科学院烟台海岸带研究所,海岸带环境过程与生态修复重点实验室,山东烟台264003; 3.中国科学院黄河三角洲滨海湿地生态系统野外科学观测研究站,山东东营257000; 4.青海师范大学地理科学学院,西宁810000
推荐引用方式 GB/T 7714	李雪,董杰,韩广轩,等. 黄河三角洲典型滨海盐沼湿地土壤CO_(2)和CH_(4)排放对水盐变化的响应[J]. 植物生态学报,2023,47(3):434-446.
APA	李雪.,董杰.,韩广轩.,张奇奇.,谢宝华.,...&宋维民.(2023).黄河三角洲典型滨海盐沼湿地土壤CO_(2)和CH_(4)排放对水盐变化的响应.植物生态学报,47(3),434-446.
MLA	李雪,et al."黄河三角洲典型滨海盐沼湿地土壤CO_(2)和CH_(4)排放对水盐变化的响应".植物生态学报 47.3(2023):434-446.