上海海洋大学学报2024，Vol.33Issue(3)：702-714,13.DOI:10.12024/jsou.20231004334
大规模筏式养殖生境中端足类群聚特征和时空差异
Assemblage structure and spatial-temporal variation of amphipods in large-scale raft culture habitats
摘要
Abstract
This study is based on synchronous data collection in the intertidal zone of the raft culture area on Shengsi Gouqi Island from February to July 2022(the rapid growth period of large seaweed from March to April,the mature period in May,and the decline period from June to July).Relative importance index,Shannon-Weaver diversity,and Margalef richness index were used in combination with multivariate statistical methods such as clustering and sorting to analyze the species composition,abundance density changes,and clustering characteristics of amphipods attached to different structures on rafts and large seaweed.A total of 24 amphipod species were collected,belonging to 16 genera in 7 families within 2 suborders.Among these,24 amphipod species were collected in the aquaculture habitat,while only 4 species were collected in the intertidal zone.The dominant species on the aquaculture rafts were Ampithoe valida,Sunampithoe plumosa,Hyale schmidti,Caprella kroyeri,Caprella decipiens,and Caprella equilibra.In the intertidal zone,no dominant species were observed,and the IRI values for all species were less than 5.The overall abundance density of amphipods showed a monthly increasing trend,rising from(580±90)ind./m2 during the rapid growth period of large seaweed from February to April to(3 800±400)ind./m2 during the decline period from June and July.The highest average abundance density among different sites was found on the floaters,with(9 700±400)ind./m2 while the lowest was observed on the mussel strings with(4 800±100)ind./m2.Amphipods had the highest abundance and diversity during the rapid growth period of large seaweed,followed by the mature period,and the lowest values were observed during the decline period.Yibei strings had the highest abundance and diversity indices.In terms of clustering characteristics,amphipod communities not only exhibited significant temporal variations but also significant differences among different sites(P＜0.01).In terms of amphipods'selection and utilization of different large seaweeds,six amphipod species,including Ampithoe valida,exhibited a significant positive correlation with the biomass of brown and green algae(P＜0.01).The study found that large-scale raft-based aquaculture areas support a diverse,structurally varied,and highly abundant amphipod resource.This conclusion can provide an important basis for the construction of artificial habitats in marine ranching and the optimization of ecosystem structure.关键词
端足类/种群密度/生物量/种类分布Key words
amphipods/population density/biomass/species distribution分类
农业科技引用本文复制引用
孙梦雨,汪振华,林军,章守宇,王凯,李晶晶..大规模筏式养殖生境中端足类群聚特征和时空差异[J].上海海洋大学学报,2024,33(3):702-714,13.基金项目
国家自然科学基金(42376207) （42376207）
国家重点研发计划(2019YFD0901303) （2019YFD0901303）
上海海洋大学科技发展专项(A2-2006-20200212) （A2-2006-20200212）
