Purification Efficiency of Two Ecotypes of Wetland Plants on Subtropical Eutrophic Lakes in China

IF 1.8 4区 环境科学与生态学 Q3 ECOLOGY
Yingmo Zhu, Kangning Shu, Ke Yang, Zhe Chen
{"title":"Purification Efficiency of Two Ecotypes of Wetland Plants on Subtropical Eutrophic Lakes in China","authors":"Yingmo Zhu, Kangning Shu, Ke Yang, Zhe Chen","doi":"10.1007/s13157-024-01787-7","DOIUrl":null,"url":null,"abstract":"<p>The accelerated eutrophication rate of (sub)tropical lakes is a major environmental problem. Constructed wetlands are considered as an effective method to purify water bodies. However, the removal rate of nitrogen (N), phosphorus (P) and other nutrients by wetland vegetation is quite different, and the continuous observation of plants and water ecosystems is required. In this study, the growth curves of two subtropical wetland plants, <i>Phragmites australis</i> and <i>Zizania caduciflora</i>, and their absorption effects on N and P in constructed wetlands were studied. The results showed that the growth curves of the two wetland plants were similar, reaching the biomass peak in July to August, and the cumulative absorption of N and P by plants had the same trend with the change of biomass. The N and P concentration of plants reached the peak in March to April, with higher concentration in <i>Phragmites australis</i> than that of <i>Zizania caduciflora</i>. At the end of the growing season, i.e. around October 20, the accumulated absorption of N and P by plants reached the maximum, which was the optimal time for harvest of subtropical wetland plants. Thereafter, the residues of plant litter entered the water, causing the recovery of N and P concentration in the water body, therefore affected the purification function of wetland. There is a strong correlation between the water purification efficiency and plant growth. With the increase of biomass, N and P accumulation in <i>Phragmites australis</i> and <i>Zizania caduciflora</i>, the N, P content and chemical oxygen demand (COD) in the water of wetland showed a significant decreasing trend. The removal rates of N, P, COD and suspended substance (SS) in the constructed wetlands with <i>Phragmites australis</i> and <i>Zizania caduciflora</i> as the main plants were 95%, 96%, 82% and 86%, respectively. In general, the purification capacity of <i>Phragmites australis</i> is slightly higher than that of <i>Zizania caduciflora</i> and precipitation had positive effects on the pollutants concentration of wetland water. The results provide scientific basis for plant selection and management of subtropical constructed wetlands.</p>","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"258 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wetlands","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s13157-024-01787-7","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

The accelerated eutrophication rate of (sub)tropical lakes is a major environmental problem. Constructed wetlands are considered as an effective method to purify water bodies. However, the removal rate of nitrogen (N), phosphorus (P) and other nutrients by wetland vegetation is quite different, and the continuous observation of plants and water ecosystems is required. In this study, the growth curves of two subtropical wetland plants, Phragmites australis and Zizania caduciflora, and their absorption effects on N and P in constructed wetlands were studied. The results showed that the growth curves of the two wetland plants were similar, reaching the biomass peak in July to August, and the cumulative absorption of N and P by plants had the same trend with the change of biomass. The N and P concentration of plants reached the peak in March to April, with higher concentration in Phragmites australis than that of Zizania caduciflora. At the end of the growing season, i.e. around October 20, the accumulated absorption of N and P by plants reached the maximum, which was the optimal time for harvest of subtropical wetland plants. Thereafter, the residues of plant litter entered the water, causing the recovery of N and P concentration in the water body, therefore affected the purification function of wetland. There is a strong correlation between the water purification efficiency and plant growth. With the increase of biomass, N and P accumulation in Phragmites australis and Zizania caduciflora, the N, P content and chemical oxygen demand (COD) in the water of wetland showed a significant decreasing trend. The removal rates of N, P, COD and suspended substance (SS) in the constructed wetlands with Phragmites australis and Zizania caduciflora as the main plants were 95%, 96%, 82% and 86%, respectively. In general, the purification capacity of Phragmites australis is slightly higher than that of Zizania caduciflora and precipitation had positive effects on the pollutants concentration of wetland water. The results provide scientific basis for plant selection and management of subtropical constructed wetlands.

Abstract Image

中国亚热带富营养化湖泊两种湿地植物生态型的净化效率
亚热带湖泊富营养化速度加快是一个重大环境问题。人工湿地被认为是净化水体的有效方法。然而,湿地植被对氮(N)、磷(P)和其他营养物质的去除率存在很大差异,需要对植物和水生态系统进行持续观测。本研究研究了两种亚热带湿地植物--葭(Phragmites australis)和菰(Zizania caduciflora)的生长曲线及其在人工湿地中对氮和磷的吸收效果。结果表明,两种湿地植物的生长曲线相似,均在 7 月至 8 月达到生物量峰值,植物对氮和磷的累积吸收量随生物量的变化趋势相同。植物的氮和磷浓度在 3 月至 4 月达到峰值,葭藻的浓度高于柘树。在生长季节的末期,即 10 月 20 日左右,植物对氮和磷的累积吸收量达到最大值,这是收获亚热带湿地植物的最佳时机。此后,植物残体进入水体,导致水体中氮、磷浓度恢复,从而影响了湿地的净化功能。水体净化效率与植物生长有很大关系。随着葭藻和茭白生物量的增加、氮和磷的积累,湿地水体中的氮、磷含量和化学需氧量(COD)呈显著下降趋势。以苇草和水飞蓟为主要植物的人工湿地对氮、磷、COD 和悬浮物的去除率分别为 95%、96%、82% 和 86%。总体而言,葭草的净化能力略高于柘树,且降水对湿地水体污染物浓度有积极影响。研究结果为亚热带人工湿地的植物选择和管理提供了科学依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Wetlands
Wetlands 环境科学-环境科学
CiteScore
4.00
自引率
10.00%
发文量
108
审稿时长
4.0 months
期刊介绍: Wetlands is an international journal concerned with all aspects of wetlands biology, ecology, hydrology, water chemistry, soil and sediment characteristics, management, and laws and regulations. The journal is published 6 times per year, with the goal of centralizing the publication of pioneering wetlands work that has otherwise been spread among a myriad of journals. Since wetlands research usually requires an interdisciplinary approach, the journal in not limited to specific disciplines but seeks manuscripts reporting research results from all relevant disciplines. Manuscripts focusing on management topics and regulatory considerations relevant to wetlands are also suitable. Submissions may be in the form of articles or short notes. Timely review articles will also be considered, but the subject and content should be discussed with the Editor-in-Chief (NDSU.wetlands.editor@ndsu.edu) prior to submission. All papers published in Wetlands are reviewed by two qualified peers, an Associate Editor, and the Editor-in-Chief prior to acceptance and publication. All papers must present new information, must be factual and original, and must not have been published elsewhere.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信