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Submarine outfall effect on subtidal macrobenthic communities in a southwestern Atlantic coastal city
Cuello, G.V.; Saracho Bottero, M.A.; Llanos, E.N.; Garaffo, G.V.; Hines, E.; Elias, R.; Jaubet, M.L. (2023). Submarine outfall effect on subtidal macrobenthic communities in a southwestern Atlantic coastal city. Heliyon 9(7): e18258. https://dx.doi.org/10.1016/j.heliyon.2023.e18258
In: Heliyon. Cell Press: Cambridge. ISSN 2405-8440; e-ISSN 2405-8440
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| Trefwoord |
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| Author keywords |
sewage pollution; wastewater; organic enrichment; EDAR; soft bottoms; SW Atlantic |
| Auteurs | | Top |
- Cuello, G.V.
- Saracho Bottero, M.A.
- Llanos, E.N.
- Garaffo, G.V.
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- Hines, E.
- Elias, R.
- Jaubet, M.L.
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| Abstract |
Submarine outfalls are an effective alternative for the final discharge of wastewater. The aim was to evaluate the subtidal macrobenthic community's responses and the changes in bottom sedimentary dynamics due to submarine outfall (SO) location. Sampling stages were: before SO (BSO), after SO (ASO) and after treatment plant (AEDAR). Sampling sites were determined at different distances from the coastline (coastal, oceanic, and reference) on both sides of the pipe (North and South). Species shifts (from tolerant to sensitive) were observed along with a decrease in organic matter in the AEDAR Stage. There were changes in the sedimentary dynamic with sediment accumulation on the South side of the SO (finest sediments) and erosion on the North side (coarsest sediments) in the ASO and AEDAR Stages. Species turnover was higher than nesting in all stages. Functional trait analysis allowed the identification of temporal variations in benthic communities. The body size, development mode, feeding mode, habit, adult mobility and tolerance to pollution were useful functional traits to detect changes through Stages (BSO, ASO, and AEDAR). Biotic indices classified the sites as slightly disturbed, indicating a slight improvement in the AEDAR Stage. |
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