The contribution of sediment desiccation and rewetting process to eutrophication in the presence and absence of emergent macrophytes

	The contribution of sediment desiccation and rewetting process to eutrophication in the presence and absence of emergent macrophytes
	Ali, Farasat; Bai, Leilei; Hao, Zheng; Wang, Chunliu; Tian, Linqi; Jiang, Helong
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2021
卷号	29 期号:5 页码:7254-7270
英文摘要	The purpose of current study was to investigate the effects of sediment desiccation on nutrient dynamics and eutrophication in wetlands during the presence or absence of wiry and sturdy rooted emergent macrophytes, based on the hypothesis that sediment desiccation negatively correlated with plants nutrient uptake abilities and positively with nutrients fluxes at sediment-water interface. Growth of four emergent macrophytes, including two wiry rooted plants, i.e., Alocasia cucullata and Aglaonema commutatum, and two sturdy rooted plants, i.e., Cannabis indica and Acorus calamus, were grown and investigated in dried-rewetted sediments (DS) and constantly wet sediments (WS), respectively, for 6 months. The findings revealed that sediment drying and rewetting process significantly decreased the diffusion of overlying nutrient into sediment and the particle size density, porosity, and nutrients' repository ability in DS treatments, while the sediment bulk density and mineralization of organic macronutrients increased. Compared to WS treatments, the DS treatments impaired plant growth, root biomass, shoot biomass, and stimulated higher fluxes of ammonium nitrogen (NH4+-N, 0.042-0.081 mg m(-2) d(-1)) and phosphate (PO43- -P; 0.009-0.030 mg m(-2) d(-1)) at sediment-water interface upon rewetting. The higher internal release of macronutrients and dissolved organic carbon (DOC) from DS led to the higher chlorophyll-a (Chl-a) concentrations (34.47-21.28 to 41.76-33.36 mu g L-1) in their water column than in the water column of WS. The wiry rooted plants with higher root biomass displayed lower internal release of NH4+ -N, PO43-P and DOC and water column Chl-a concentrations than the sturdy rooted plants in two sediment types. Root biomass of plants correlated positively with TN (63-87%) and TP (56-78%) removal percentages from WS and DS. These results demonstrated that sediment desiccation process reduced plant growth and enhanced internal loading of nutrients and consequently accelerated eutrophication in these wetlands.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20403]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Ali, Farasat,Bai, Leilei,Hao, Zheng,et al. The contribution of sediment desiccation and rewetting process to eutrophication in the presence and absence of emergent macrophytes[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2021,29(5):7254-7270.
APA	Ali, Farasat,Bai, Leilei,Hao, Zheng,Wang, Chunliu,Tian, Linqi,&Jiang, Helong.(2021).The contribution of sediment desiccation and rewetting process to eutrophication in the presence and absence of emergent macrophytes.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,29(5),7254-7270.
MLA	Ali, Farasat,et al."The contribution of sediment desiccation and rewetting process to eutrophication in the presence and absence of emergent macrophytes".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 29.5(2021):7254-7270.