Seasonal precipitation distribution determines ecosystem CO<sub>2</sub> and H<sub>2</sub>O exchange by regulating spring soil water-salt dynamics in a brackish wetland

doi:10.1111/1365-2435.14617

	Seasonal precipitation distribution determines ecosystem CO₂ and H₂O exchange by regulating spring soil water-salt dynamics in a brackish wetland
	Huang, Wanxin 1,2,3,4; Han, Guangxuan1,2,3 ; Wei, Siyu 1,2,3; Zhao, Mingliang 1,2,3; Chu, Xiaojing 1,2,3; Sun, Ruifeng 1,2,3; Zou, Nan 4; Wang, Xiaojie 1,2,3; Li, Peiguang 1,2,3; Zhang, Xiaoshuai 1,2,3; Lu, Feng 5; Zhang, Shuyan 5
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
	2024-07-14
页码	12
关键词	brackish wetland ecosystem CO2 and H2O exchange seasonal precipitation distribution soil water-salt dynamics Yellow River Delta
DOI	10.1111/1365-2435.14617
通讯作者	Chu, Xiaojing([email protected])
英文摘要	1. The intensification of the global hydrological cycle is anticipated to increase the variability of precipitation patterns. Brackish wetlands respond to changes in precipitation patterns by regulating the absorption and release of CO2 and H2O to maintain the stability of ecosystem functions. However, there is limited understanding of how the inter-seasonal precipitation distribution (SPD) affects ecosystem CO2 and H2O exchange compared with annual precipitation totals. 2. Here, we conducted four consecutive years of field experiments in a brackish wetland, manipulating the proportion of precipitation across different seasons while maintaining a constant annual precipitation total. We utilized five inter-SPD proportions (+73%, +56%, control (CK), -56%, -73%) to examine the effects of SPD on ecosystem CO2 and H2O exchange. 3. Our findings revealed that the annual ecosystem CO2 and H2O fluxes showed a trend of decreasing with the decrease in spring precipitation distribution. Among them, the annual net ecosystem CO2 exchange, evapotranspiration, carbon use efficiency and water use efficiency were shown to be more sensitive to decrease in spring precipitation distribution and increase in summer and autumn precipitation distribution. This negative asymmetric response pattern suggests that annual ecosystem CO2 and H2O exchange is primarily governed by seasonal precipitation variability, with spring soil water-salt dynamics identified as the key driver. Therefore, this association can be explained by the fact that drought of the early growth stage exacerbates soil salinization and inhibits vegetation colonization and growth, thereby greatly impairing the annual CO2-H2O exchange capacity of brackish wetlands. 4. Our results emphasized that the spring extreme precipitation-induced soil water-salt conditions will greatly influence CO2 and H2O exchange in brackish wetlands in the future. These findings are crucial for improving predictions of the carbon sequestration and water-holding capacity of brackish wetlands. Read the free Plain Language Summary for this article on the Journal blog.
资助机构	Natural Science Foundation of China ; International Science Partnership Program of the Chinese Academy of Sciences ; Natural Science Foundation of Shandong Province ; National Key Research and Development Program of China ; Forestry Science and Technology Innovation Project of Shandong Province
收录类别	SCI
语种	英语
关键词[WOS]	STOMATAL CONDUCTANCE ; USE EFFICIENCY ; LEAF-AREA ; CARBON ; RESPONSES ; FOREST ; PLANTATIONS ; RESPIRATION ; VARIABILITY ; RAINFALL
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:001272406600001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35706
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室支撑部门_中国科学院黄河三角洲滨海湿地试验站
通讯作者	Chu, Xiaojing
作者单位	1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai, Peoples R China 2.Shandong Key Lab Coastal Environm Proc, Yantai, Peoples R China 3.Chinese Acad Sci, Yellow River Delta Field Observat & Res Stn Coasta, Dongying, Peoples R China 4.Ludong Univ, Sch Life Sci, Yantai, Peoples R China 5.Adm Bur Yellow River Delta Natl Nat Reserve, Dongying, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wanxin,Han, Guangxuan,Wei, Siyu,et al. Seasonal precipitation distribution determines ecosystem CO₂ and H₂O exchange by regulating spring soil water-salt dynamics in a brackish wetland[J]. FUNCTIONAL ECOLOGY,2024:12.
APA	Huang, Wanxin.,Han, Guangxuan.,Wei, Siyu.,Zhao, Mingliang.,Chu, Xiaojing.,...&Zhang, Shuyan.(2024).Seasonal precipitation distribution determines ecosystem CO₂ and H₂O exchange by regulating spring soil water-salt dynamics in a brackish wetland.FUNCTIONAL ECOLOGY,12.
MLA	Huang, Wanxin,et al."Seasonal precipitation distribution determines ecosystem CO₂ and H₂O exchange by regulating spring soil water-salt dynamics in a brackish wetland".FUNCTIONAL ECOLOGY (2024):12.