春季降雨分配变化对黄河三角洲滨海湿地优势种的影响

	春季降雨分配变化对黄河三角洲滨海湿地优势种的影响
其他题名	Effects of spring rainfall distribution on soil respiration in a coastal wetland of the Yellow River Delta
	周英锋 1; 贾文丽 2; 马澍 2,3
发表期刊	山东林业科技
ISSN	1002-2724
	2022
卷号	52 期号:3 页码:36-42
关键词	春季降雨分配水盐运移植被特征滨海湿地黄河三角洲
英文摘要	Changes of rainfall seasonal pattern would affect carbon cycling in coastal wetlands by influencing the transport of water and salt in soils. Seed germination and plant growth in coastal wetlands are sensitive to rainfall availability in spring,but the underlying mechanism of spring rainfall distribution on soil respiration is still unclear. An in-situ spring rainfall control field experiment with five treatments (+73%,+56%,control,-56% and -73% in spring,but the annual total rainfall remained the same) were set up to explore the effects of spring rainfall distribution on soil respiration of a coastal wetland on the Yellow River Delta. Soil water content in spring significantly increased with the increasing rainfall partitioning in spring,while that in autumn significantly decreased. The seasonal variation of soil salinity was opposite to soil moisture, and soil salinity showed strongest fluctuations in spring compared with other seasons. The total belowground biomass and the proportion of belowground biomass in deep soil layer increased with the increasing spring rainfall partitioning,while the proportion of belowground biomass in shallow soil layer showed an opposite pattern. Mean annual soil respiration rate was decreased with the decreasing spring rainfall partitioning,and was significantly different between +73% and -73% treatments (P<0.05). Soil respiration rate differed among different seasons. Soil respiration rate in spring and summer increased with the increasing rainfall partitioning in spring,but decreased in autumn and winter. However,the positive effect of increased spring rainfall partitioning on soil respiration in spring and summer was much greater than the negative effect in autumn and winter. Mean annual soil respiration was closely related to soil moisture and soil salinity in spring,and remarkably affected by the proportion of belowground biomass of different soil layers and total belowground biomass.
中文摘要	滨海湿地生态系统与其他陆地生态系统相比固碳速度更快,被称为地球上的“蓝色碳汇”,该生态系统拥有高初级生产力及低有机质分解速度。气候改变情况下,湿地土壤的水分与盐分含量因为大气降水时间分配不均匀而发生变化,进而干扰植株代谢,最终改变该地植株的生理特性。2019-2020年的监测数据表明:春季大气降水增多时,2019与2020年芦苇与白茅的生长指标(株高、株数、盖度)会增大,而碱蓬的植株高度则会减小。
文章类型	期刊论文
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:7010601
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/34191
专题	支撑部门_中国科学院黄河三角洲滨海湿地试验站
作者单位	1.山东省黄河三角洲国家级自然保护区管理委员会,山东东营257500; 2.聊城大学地理与环境学院,山东聊城252000; 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
推荐引用方式 GB/T 7714	周英锋,贾文丽,马澍. 春季降雨分配变化对黄河三角洲滨海湿地优势种的影响[J]. 山东林业科技,2022,52(3):36-42.
APA	周英锋,贾文丽,&马澍.(2022).春季降雨分配变化对黄河三角洲滨海湿地优势种的影响.山东林业科技,52(3),36-42.
MLA	周英锋,et al."春季降雨分配变化对黄河三角洲滨海湿地优势种的影响".山东林业科技 52.3(2022):36-42.