Effects of artificial reef construction on macrobenthos communities:A case study of four artificial reefs in the Yellow Sea and Bohai Sea
In order to explore the differences in the structural characteristics of macrobenthos communities in differ-ent artificial reefs in the Yellow Sea and Bohai Sea and to evaluate the conservation effect of artificial reefs on bio-logical resources,a simultaneous survey of macrobenthos in four artificial reefs in the Yellow Sea and Bohai Sea was carried out in autumn 2021.A total of 61 macrobenthos species were collected,among which annelids accoun-ted for the most(47.54％).The biomass of macrobenthos in each reef area was higher than that in the control area,and the conservation effect of macrobenthos resources in the old reef area was the best,and the average biomass was 4.19 times that of the control area.The Shannon-Wiener index H'and richness index d of each reef region were higher than those of the control region,and the long reef age region was higher than the short reef age region.The ABC curve shows that the stability of the community in the long-aged reefs is better than that in the short-aged reefs.There are different dominant species in each artificial reef area,but polychaetes are the dominant species in all artificial reef areas.Reef survey sites were roughly divided into 3 groups by cluster analysis and non-metric mul-tidimensional scale ranking(NMDS).Similarity analysis test(ANOSIM)showed that there were significant differ-ences in community structure among reefs(R=0.651,p＜0.01).The results of SIMPER(percentage of similarity analysis)show that the average percentage of dissimilarity in each reef interval is above 77％.The results show that the artificial reef habitat plays a certain role in the conservation of macrobenthos,and the macrobenthos com-munity varies in different reef regions.This study can provide basic data and basis for the evaluation of artificial reef construction.
macrobenthosartificial reefscommunity structureYellow Sea and Bohai Sea
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