Aquaculture Environment Interactions
AEI is a gold Open Access journal and a multidisciplinary forum for primary research studies on the environmental sustainability of aquaculture.
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DOI: https://doi.org/10.3354/aei00495
copiedEffects of razor clam polyculture on plankton size fraction structure and carbon metabolism in an aquaculture system of crabs and shrimp
ABSTRACT: The size-fraction structure of the plankton community and their carbon metabolism characteristics play a pivotal role in the ecological function of aquatic ecosystems. Filter-feeding clams are important aquaculture species in the widely practiced integrated multi-trophic aquaculture (IMTA) models along coastal China. These clams can exert pronounced ecological effects through their physiological activities; however, our understanding of how clams impact the plankton size fraction of the aquaculture systems remains limited. In this study, razor clams were co-cultured in a swimming crab and kuruma shrimp polyculture system at 4 distinct densities. Chlorophyll a (chl a) content, gross primary production (GPP), net primary production (NPP) and respiration of size-fractioned plankton (macroplankton, microplankton, nanoplankton, picoplankton) were measured. Results showed that picoplankton were the primary contributors to the respiration of the aquaculture systems, and nanoplankton played a significant role in chl a content and GPP. NPP of nanoplankton exhibited positive values across various systems, while that of picoplankton demonstrated negative values. Respiration, chl a, GPP and NPP of macroplankton, microplankton and nanoplankton in the clam high-density polyculture group were significantly lower than those in the low-density group, while those of picoplankton exerted an inverse pattern across various systems. Co-culturing razor clams at varying densities under the current experimental conditions significantly decreased the biomass and metabolism of the plankton community, which was primarily mediated through nanoplankton alterations due to the selective grazing of clams. High-density polyculture of razor clams could drive the miniaturization of the plankton community in IMTA systems.
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Dongxu Zhang (Co-author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Yupeng Chen (Co-author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Huiling Liu (Co-author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Shuang Li (Co-author)
- National and Provincial Joint Engineering Research Centre for Marine Germplasm Resources Exploration and Utilization, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
Sainan Yao (Co-author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Jie He (Co-author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Wenjun Xu (Corresponding Author)
- Zhejiang Marine Fisheries Research Institute, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhoushan 316021, PR China
Handling Editor:
Adam Hughes, Oban, UK
Reviewers:
3 anonymous referees
Acknowledgements:
This study was funded by the National Natural Science Foundation of China (grant no. 32002395) and the Ningbo Major Scientific and Technological Task Breakthrough Project (grant no. 2022Z172).