Abstract
BackgroundArtificial fishery habitat has been widely used in fishery resource protection and water habitat restoration. Although the bacterioplankton plays an important ecological role in fisheries ecosystems, the effect of artificial fishery habitat on bacterioplankton is not clear. In this study, high-throughput sequencing based on the 16S rRNA gene was carried out to study the characteristics of bacterioplankton community structure in artificial fishery habitat and to determine the principal environmental factors that shaped the composition, structure and function of bacterioplankton communities in an unfed aquaculture system.ResultsThe results indicated that the most dominant phyla were Proteobacteria (Alphaproteobacteria and Gammaproteobacteria), Actinobacteria, Cyanobacteria, and Bacteroidetes, which accounted for 28.61%, 28.37%, 19.79%, and 10.25% of the total abundance, respectively. The factors that cause the differences in bacterioplankton community were mainly manifested in three aspects, including the diversity of the community, the role of artificial fishery habitat, and the change of environmental factors. The alpha diversity analysis showed that the diversity and richness index of the bacterioplankton communities were the highest in summer, which indicated that the seasonal variation characteristics had a great influence on it. The CCA analysis identified that the dissolved oxygen, temperature, and ammonium salt were the dominant environmental factors in an unfed aquaculture system. The LEfSe analysis founded 37 indicator species in artificial structure areas (AS group), only 9 kinds existing in the control areas of the open-water group (CW group). Meanwhile, the KEGG function prediction analysis showed that the genes which were related to metabolism in group AS were significantly enhanced.ConclusionsThis study can provide reference value for the effect of artificial habitat on bacterioplankton community and provide fundamental information for the follow-up study of ecological benefits of artificial fishery habitat. It may be contributed to apply artificial fishery habitat in more rivers.
Highlights
Artificial fishery habitat has been widely used in fishery resource protection and water habitat restoration
The bacterioplankton community is one of the vital parts of the aquatic ecosystem. It has played many key roles in the process of biogeochemical circulation, including ammonia oxidation, degradation, adsorption, fixation of carbon dioxide and nitrogen [1,2,3,4,5].It is an important goal of microbial ecology to study that which habitat or environmental factors can affect the bacterioplankton community structure, and revealing the spatio-temporal variation of the bacterioplankton community is helpful to clarify the variation process and functional maintenance of microorganisms [6, 7]
Some scholars had shown that the spatial variation which was from the water surface to bottom in the bacterioplankton community could be greater than that of seasonal change [22]
Summary
Artificial fishery habitat has been widely used in fishery resource protection and water habitat restoration. Bi et al BMC Ecology and Evolution (2022) 22:10 fragmentation have become the main problems affecting the development of river fisheries and the dynamics of planktonic microorganisms In this context, it is necessary to construct the artificial fishery habitat for the restoration of aquatic ecology, and which has become an ideal carrier for studying the dynamic characteristics of the bacterioplankton community under the influence of natural and human forces. The bacterioplankton community is one of the vital parts of the aquatic ecosystem It has played many key roles in the process of biogeochemical circulation, including ammonia oxidation, degradation, adsorption, fixation of carbon dioxide and nitrogen [1,2,3,4,5].It is an important goal of microbial ecology to study that which habitat or environmental factors can affect the bacterioplankton community structure, and revealing the spatio-temporal variation of the bacterioplankton community is helpful to clarify the variation process and functional maintenance of microorganisms [6, 7]. Some scholars had shown that the spatial variation which was from the water surface to bottom in the bacterioplankton community could be greater than that of seasonal change [22]
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