AI Article Synopsis
- The study developed a new slow-release oxygen material (SROM) to enhance benthic ecosystem health by analyzing its impact on pH, dissolved oxygen (DO), nutrient release, and greenhouse gas emissions.
- Dosing SROM on mud surfaces improved water's DO significantly and maintained optimal pH levels for benthic species, leading to better growth rates for submerged plants (Ceratophyllum) and benthic animals (Cipangopaludina cahayensis).
- The results indicated that SROM not only aids in restoring benthic habitats but also increases bacterial diversity, promoting a healthier microbial community crucial for nutrient cycling.
Article Abstract
The oxygen level is key benthic ecosystem health. In this study, a new kind of slow-release oxygen material (SROM) was developed and evaluated in a simulation experiment. The effects of SROM dose and dosing method on the pH and DO, the release of nitrogen and phosphorus, and greenhouse gas emissions were studied. The restoration of typical benthic species (Ceratophyllum represented submerged plants and Cipangopaludina cahayensis represented benthic animals) was also evaluated based on the analysis of catalase and peroxidase activities, survival rate, and biomass. The result shows that dosing SROM on mud surfaces had a better effect than dosing in mud. When dosing SROM on the surface of mud at a suitable dose, the DO of water increased from 0.5 mg/L to higher than 4 mg/L, and the pH was below 9, which would be suitable for the survival of benthos. Dosing SROM could also cause the concentrations of nutrient elements (NH-N, TN, TP, and PO) in overlying water and the emission flux of CH and CO to decrease. In addition, the growth of Ceratophyllum and Cipangopaludina cahayensis was accelerated, which benefited the restoration of benthic ecosystems. For microbial community structure, various of bacteria for nitrogen and the phosphorus cycle were found in the sediment (including aerobic denitrifying bacteria). Dosing SROM could increase the Simpson index of the bacterial community, means an increase in bacterial diversity. The results show that the dosing of SROM could be an effective method in the early stage of benthic habitat restoration.
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| http://dx.doi.org/10.1016/j.chemosphere.2022.134658 | DOI Listing |
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Article Synopsis
- The study developed a new slow-release oxygen material (SROM) to enhance benthic ecosystem health by analyzing its impact on pH, dissolved oxygen (DO), nutrient release, and greenhouse gas emissions.
- Dosing SROM on mud surfaces improved water's DO significantly and maintained optimal pH levels for benthic species, leading to better growth rates for submerged plants (Ceratophyllum) and benthic animals (Cipangopaludina cahayensis).
- The results indicated that SROM not only aids in restoring benthic habitats but also increases bacterial diversity, promoting a healthier microbial community crucial for nutrient cycling.
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