AI Article Synopsis
- The study investigated how temperature and phytoplankton influence nutrient cycling near aquaculture farms, using convergent cross mapping (CCM) to understand their effects.
- High nitrogen isotope (δN) values indicated that nitrogen from aquaculture is a major source of nutrients in the inner bay compared to the outer bay.
- CCM results showed that temperature significantly boosts nutrient regeneration, especially from bottom sediments, while phytoplankton quickly consume available nutrients.
Article Abstract
The potential roles of temperature and phytoplankton in nutrient cycling throughout the water column were investigated nearby aquaculture farms. Using the convergent cross mapping (CCM), we examined the relative strength of phytoplankton and temperature effects on nutrients. High δN values of particulate organic matter in the inner bay were detected compared to those in the outer bay. δN values >5 ‰ throughout the bay indicate that nitrogen influxes from the aquaculture farms are the critical nitrogen source in the study region. Our CCM models revealed that temperature positively and strongly affected the potential regeneration of nutrients, associated with PO while phytoplankton utilized nutrients as soon as available. The temperature-driven nutrient regeneration was higher in the bottom layer than that in the surface layer, indicating that temperature was a more important controlling factor in nutrient fluxes from the surface sediments.
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| http://dx.doi.org/10.1016/j.scitotenv.2023.164643 | DOI Listing |
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