其他题名Co-regulation of rainfall amount and timing on soil carbon mineralization in a typical salt marsh of the Yellow River Delta,China
李雪1,2,3; 董杰1; 李培广2,3; 王晓杰2,3; 韩广轩2,3
; 宋维民2,3发表期刊应用生态学报
ISSN1001-9332
2021
卷号32期号:2页码:581-590
关键词降雨体系气候变化黄河三角洲盐沼湿地碳汇土壤碳矿化
研究领域Agriculture
英文摘要Studying the effects of rainfall regimes such as rainfall amount and timing on soil carbon mineralization is of great importance for our understanding the mechanisms underlying the stability and accumulation of soil carbon in coastal salt marshes. In this study,we examined the responses of soil carbon mineralization (CO_2 and CH_4 fluxes) from undisturbed soil columns to rainfall events in different seasons (dry and wet seasons) with filed experiments in a primary Suaeda salsa region in the Yellow River Delta salt-marsh wetland,which is far away from the coast and not affected by tides. The results showed that rainfall amount and timing had a significant interaction in affecting soil CO_2 flux rates. During the dry season,large rainfall events significantly reduced soil CO_2 flux rates but had no significant effect in the wet season,which might be closely related to the significant increase in soil water content and salinity. Rainfall amount,rainfall timing and their interactions had no significant effect on soil CH_4 efflux rates. Rainfall timing and rainfall amount did not affect CH_4 /CO_2. CH_4 /CO_2 increased with increasing soil water content and salinity. Soil water content and soil salinity showed similar increases to increasing rainfall amount. Our results suggested that the changing rainfall regime under climate change in the future would have a great impact on soil carbon mineralization and carbon sink function by regulating soil water and salt migration in this region.
中文摘要研究降雨格局(如降雨量和降雨时间)对滨海盐沼湿地土壤碳矿化的影响,对于深入理解土壤碳的稳定性和积累机制具有重要意义。本研究选取远离海岸且不受潮汐影响的黄河三角洲原生盐地碱蓬盐沼湿地为对象,通过野外原状土柱的控制试验,分析土壤碳矿化(CO_2和CH_4通量)在不同时期(干旱期和湿润期)对降雨事件的响应。结果表明:降雨时间和降雨量对土壤CO_2通量的影响存在交互作用。在干旱期,大降雨事件显著降低了土壤CO_2通量;而湿润期的降雨事件对土壤CO_2通量没有显著影响,这可能与盐沼湿地的水盐运移有关。降雨量、降雨时间及其交互作用均对土壤CH_4通量没有显著影响。降雨时间和降雨量对CH_4 /CO_2比率均没有显著影响,但是相关分析表明随着土壤含水量和盐分的升高,CH_4 /CO_2比率呈升高趋势。随着降雨量的增加,土壤含水量和土壤盐分都显著增加,且两因素呈现显著的正相关关系。因此,未来该地区降雨体系改变将可能通过调控土壤水盐运移等条件对该滨海湿地土壤碳矿化和碳汇功能产生深远影响。
文章类型Article
资助机构国家自然科学基金项目; 国家自然科学基金委员会-山东联合基金项目; 中国科学院十三五信息化建设专项
收录类别CSCD
语种中文
CSCD记录号CSCD:6904406
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/30302
专题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.聊城大学环境与规划学院,山东聊城252059;
2.中国科学院烟台海岸带研究所,中国科学院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实验站,山东东营257500
推荐引用方式
GB/T 7714李雪,董杰,李培广,等. 降雨量和降雨时间共同调控黄河三角洲典型盐沼湿地土壤碳矿化[J]. 应用生态学报,2021,32(2):581-590.
APA李雪,董杰,李培广,王晓杰,韩广轩,&宋维民.(2021).降雨量和降雨时间共同调控黄河三角洲典型盐沼湿地土壤碳矿化.应用生态学报,32(2),581-590.
MLA李雪,et al."降雨量和降雨时间共同调控黄河三角洲典型盐沼湿地土壤碳矿化".应用生态学报 32.2(2021):581-590.
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