Modify aquaculture practices in watershed to reduce pollution
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Nutrients from aquaculture stock can spill over into focal marshes or swamps, causing pollution problems. This includes nutrients in excretory products from the animals themselves, as well as in excess food (Dauda et al. 2019). An excess of nutrients in marshes and swamps can affect the plant community composition, plant diversity and distribution of plant species (Verhoeven et al. 2006; Bromberg Gedan et al. 2009). Extreme excesses can cause algal blooms.
This action includes a range of specific management techniques, other than changes in fertilizer or herbicide use, that might reduce pollution in focal marshes or swamps from aquacultural facilities elsewhere in the catchments. These interventions include: completely excluding or removing stock, reducing aquacultural intensity (by reducing frequency and/or degree of stocking), or better management of feed (altering the amount and/or timing).
Bromberg Gedan K., Silliman B.R. & Bertness M.D. (2009) Centuries of human-driven change in salt marsh ecosystems. Annual Review of Marine Science, 1, 117–141.
Dauda A., Ajadi A., Tola-Fabunmi A.S. & Akinwole A.O. (2019) Waste production in aquaculture: sources, components and managements in different culture systems. Aquaculture and Fisheries, 4, 81–88.
Verhoeven J.T.A., Arheimer B., Yin C. & Hefting M.M. (2006) Regional and global concerns over wetlands and water quality. Trends in Ecology and Evolution, 21, 96–103.