Abstract
Bioturbation by the razor clam Sinonovacula constricta affects benthic nutrient fluxes in aquaculture wastewater treatment ecosystems
Highlights
The rapid development of the aquaculture industry has been accompanied by an increase in environmental impacts
The organic matter of aquaculture effluent can be transformed into inorganic nutrients that can be utilized as a rich source of nutrients for phytoplankton under the action of aeration (Granéli et al 1999)
The clams seldom occurred on the sediment surface, but their siphons occasionally extended above the sediment surface
Summary
The rapid development of the aquaculture industry has been accompanied by an increase in environmental impacts. In the shellfish filtering area, bioturbation by benthic shellfish may enhance the mineralization of organic matter; the release of nutrients from the sediment significantly improves nutrient recycling in the effluent treatment ecosystem because the feeding, burrowing and other activities of the shellfish alters the physical, chemical and ecological properties of the sediment (Thayer 1979, Meysman et al 2006, Creed et al 2010, Nicholaus & Zheng 2014, Zheng et al 2017) Shellfish, such as razor clams Sinonovacula constricta and Tagelus plebeius (Klerks et al 2018), may feed on the phytoplankton that is promoted by the released nutrients and suspended organic particulates in the water. Razor clams play a key role in this ecosystem, and it is important to understand the extent and mechanisms of their effects
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