互花米草治理工程对大型底栖动物群落结构的影响:以上海南汇边滩为例
Effects of Spartina alterniflora eradication project on macrobenthos community structure:A case study of Nanhui tidal flat in Shanghai
龚吕 1胡阳 1李贲 2宋远昊 1李泽渊 1李天佑 1李秀珍1
作者信息
- 1. 华东师范大学河口海岸学国家重点实验室,上海 200062
- 2. 华东师范大学河口海岸学国家重点实验室,上海 200062;自然资源部海洋生态监测与修复技术重点实验室,上海 201206
- 折叠
摘要
互花米草是中国海岸带典型的入侵植物,清除互花米草已成为中国重要的海岸带生态修复任务.刈割+翻耕是当前互花米草治理的主要方法之一.为评估该方法对滨海盐沼生态系统大型底栖动物的影响,本研究于2021-2022年9-12月,即南汇边滩生态修复工程开展互花米草物理治理前后的两年间对工程区域内12个采样点的大型底栖动物与沉积物理化指标进行调查.结果表明:两年间共鉴定出22种大型底栖动物,隶属于3门5纲12目19科;工程后大型底栖动物的物种数、密度、生物量、Shannon多样性指数与Chao1指数较工程前均显著增加;在群落组成方面,多毛纲、双壳纲与软甲纲动物占比提升,腹足纲与昆虫纲动物的占比则呈减少趋势;非度量多维尺度分析(NMDS)与相似性分析(Anosim)结果显示,工程前后大型底栖动物群落结构差异显著,优势种由工程前的绯拟沼螺、尖锥拟蟹守螺和背蚓虫,变为工程后的拟沼螺、绯拟沼螺、背蚓虫、中国绿螂和尖锥拟蟹守螺;冗余分析(RDA)结果显示,互花米草治理工程之后沉积物盐度、含水率等理化因子的改变影响大型底栖动物群落结构.
Abstract
Spartina alterniflora is a typical invasive species in the coastal zone of China.The removal of S.alterni-flora has become a major national ecological restoration mission.The combination of mowing and ploughing is one of the main methods of S.alterniflora eradication.To evaluate the effect of this method on the macrobenthos in coastal salt marsh,we investigated the macrobenthos and sediment physicochemical indices of 12 sampling sites in Septem-ber to December of 2021-2022,before and after the physical control of S.alterniflora in the ecological restoration project of Nanhui tidal flat.The results showed that 22 species of macrobenthos belonging to 3 phyla,5 classes,12 orders,and 19 families were identified during the two years.After the project,species number,density,biomass,Shannon diversity index and Chao1 index of macrobenthos significantly increased.In terms of macrobenthos commu-nity,the proportions of Polychaeta,Bivalvia and Malacostraca all increased,but the proportions of Gastropoda and Insecta showed a decreasing trend.The results of non-metric multidimensional scaling(NMDS)and analysis of sim-ilarities(Anosim)indicated that community structure of macrobenthos was significantly different before and after the project,and that dominant species changed from Assiminea latericea,Cerithideopsis largillierti and Notomastus latericeus to Assiminea sp.,Assiminea latericea,Notomastus latericeus,Glauconome chinensis and Cerithideopsis largillierti.The results of redundancy analysis(RDA)indicated that physicochemical factors such as sediment salinity,water moisture changed after the project,which affected the community structure of macrobenthos.
关键词
互花米草/生态修复/大型底栖动物/沉积物理化因子Key words
Spartina alterniflora/ecological restoration/macrobenthos/sediment physicochemical factor引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据