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Reduced groundwater depth decreases plant diversity but increases plant aboveground biomass allocation in a brackish wetland

文献类型：期刊论文

作者He, Yangjian1,2,3; Zhao, Mingliang1,2; Wang, Lianjing1,2; Chu, Xiaojing1,2; Wang, Xiaojie1,2; Li, Peiguang1,2; Zhang, Xiaoshuai1,2; Song, Weimin1,2; Hao, Qingju3; Zhao, Yiqi1,2
刊名PLANT AND SOIL
出版日期2025-04-28
页码18
关键词Groundwater depth Brackish wetland Biomass allocation Root: shoot ratio Plant community
ISSN号0032-079X
DOI10.1007/s11104-025-07482-8
通讯作者Jiang, Changsheng(jiangcs@126.com) ; Han, Guangxuan(gxhan@yic.ac.cn)
英文摘要Background and Aims Plant biomass allocation, often expressed as the root: shoot ratio (RSR), is essential for understanding plant adaptations to environmental changes and global carbon distribution. Changes in groundwater depth driven by climate change can significantly affect biomass allocation in brackish wetland ecosystems. However, the response of the RSR in plant communities to groundwater depth changes remains unclear. Methods To address this, we conducted in situ experiments across three groundwater depth gradients (-100 cm, -60 cm, and -20 cm) in a brackish wetland in the Yellow River Delta. Results Our results showed that biomass allocation changes in plant communities are primarily influenced by dominant species in the brackish wetland. As groundwater depth decreased from -100 cm to -20 cm, soil electrical conductivity increased, plant diversity declined, and the dominant species shifted from Phragmites australis to Suaeda salsa. Reduced groundwater depth also promoted greater aboveground biomass allocation within plant communities. Compared to the deeper groundwater depths of -100 cm and -60 cm, the shallower groundwater depth of -20 cm was associated with higher soil salinity and nutrient levels, including microbial biomass carbon, total nitrogen, and total phosphorus, which contributed to the increased biomass allocation to aboveground structures in both dominant species and plant communities. Additionally, the increased aboveground biomass allocation with decreasing groundwater depth is related to the reduction in plant diversity and the shift in plant species composition. Conclusion Our findings confirm that reduced groundwater depth enhances aboveground biomass allocation by increasing soil salinity and nutrients while simultaneously reducing plant diversity in brackish wetland ecosystems, which is consistent with optimal allocation theory. These insights provide a scientific basis for predicting vegetation productivity and developing management strategies for brackish wetlands under future groundwater change scenarios.
WOS关键词OPTIMAL PARTITIONING THEORY ; ALPINE GRASSLANDS ; GLOBAL PATTERNS ; ROOT BIOMASS ; NITROGEN ; YIELD
WOS研究方向Agriculture ; Plant Sciences
语种英语
WOS记录号WOS:001477056500001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Shandong Province Science Foundation for Youths ; International Science Partnership Program of the Chinese Academy of Sciences ; Southwest University ; Yellow River Delta Ecological Research Station of Coastal Wetland ; Chinese Academy of Sciences
源URL[http://ir.yic.ac.cn/handle/133337/40907]  
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
通讯作者Jiang, Changsheng; Han, Guangxuan
作者单位1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China
2.Chinese Acad Sci, Yellow River Delta Field Observat & Res Stn Coasta, Dongying 257500, Shandong, Peoples R China
3.Southwest Univ, Coll Resources & Environm, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Minist Educ, Chongqing 400715, Peoples R China
推荐引用方式
GB/T 7714		 He, Yangjian,Zhao, Mingliang,Wang, Lianjing,et al. Reduced groundwater depth decreases plant diversity but increases plant aboveground biomass allocation in a brackish wetland[J]. PLANT AND SOIL,2025:18.
APA He, Yangjian.,Zhao, Mingliang.,Wang, Lianjing.,Chu, Xiaojing.,Wang, Xiaojie.,...&Han, Guangxuan.(2025).Reduced groundwater depth decreases plant diversity but increases plant aboveground biomass allocation in a brackish wetland.PLANT AND SOIL,18.
MLA He, Yangjian,et al."Reduced groundwater depth decreases plant diversity but increases plant aboveground biomass allocation in a brackish wetland".PLANT AND SOIL (2025):18.

入库方式： OAI收割

来源：烟台海岸带研究所

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