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| Effects of in-situ biochar amendment on the microbial community structure of sediments in aquaculture ponds |
| Received:April 12, 2021 |
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| KeyWord:aquaculture sediment;biochar;microorganism;community structure |
| Author Name | Affiliation | E-mail | | ZHAO Hanyin | College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China | | | CHEN Panyi | College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China | | | TANG Xinzhe | East Shanghai High School, Shanghai 201306, China | | | CHEN Yiqin | College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China | | | LI Juanying | College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China | jyli@shou.edu.cn |
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| Abstract: |
| To understand the impact of in-situ biochar addition on the microbial community structure of sediments in aquaculture ponds, the microbial structure of the sediments was analyzed during in-situ remediation with biochar, using high-throughput sequencing technology. The results showed that the Simpson diversity index first decreased and then gradually increased during the experiment with wheat straw biochar amendment. And the index reached its lowest(0.16) at 42 days. Similar variations were also observed in the Shannon index, Chao1 index and OTU number. The relative abundance of the dominant bacteria at the phylum level varied in the sediments. The relative abundance of Proteobacteria and Actinobacteria increased significantly, while the relative abundance of Acidobacteria and Chloroflexi decreased. A heatmap chart also showed that the relative abundance of Ardenticatenales, Gemmatimonadaceae, bacteriap25, and Rokubacteriales decreased after first increasing, which was consistent with the previous results. Therefore, adding wheat straw biochar to the sediments is beneficial to the growth and the development of microorganisms and changes the community structure. |
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