Biogeochemical processes and nutrient cycling within an artificial reef off Southern Portugal

Falcão, Manuela; Santos, Miguel N.; Vicente, Marı́a Soledad; Monteiro, Carlos C.

doi:10.1016/j.marenvres.2006.12.001

Cited by 54 publications

(22 citation statements)

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“…This can increase the sediment load and, as a consequence, the nutrients in the water column. This may be occurring at the Victory 8B as noted by Falcão et al (2007) 15 , who observed an increase in the concentration of nutrients after the deployment of a MAR in Algarve in the south of Portugal over a two-year study. Another important aspect to be considered is that the VICTORY 8B is located south of Três Ilhas Islands and between the Rasas Islands and Escalvada Island (≈7.5, ≈2, and ≈2.8 km far from it, respectively; Figure 1).…”

Section: Resultsmentioning

confidence: 73%

Controls on Temporal and Spatial Variation of Nutrients in a Tropical Marine Artificial Reef: The Case of the Victory 8B on the Southeastern Brazilian Coast

Costa¹,

Andrade²,

Bazoni³

et al. 2014

Revista Virtual De Química

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Resumo: O objetivo deste estudo foi avaliar a distribuição temporal e espacial de nutrientes em torno do recife artificial marinho (MAR) 8B Victory, um navio afundado propositadamente em Guarapari (20 ° 40 ' S e 40 ° 30' W), no estado do Espírito Santo, em uma das mais ricas áreas de biodiversidade marinha na costa brasileira. Oito cruzeiros trimestrais de um dia foram realizados por mais de dois anos (de março de 2005 a abril de 2007) . As amostras foram coletadas em 12 estações diferentes ao redor do navio para a análise dos nutrientes inorgânicos dissolvidos (nitrito, nitrato, silício reativo e ortofosfato), clorofila a, phaeopigmentos, salinidade e temperatura. Correlações de ortofosfato e clorofila podem indicar que ele é limitante. As suas concentrações eram sempre baixas, o que pode ser devido à sedimentação de carbonato, pois a região é rica em sedimentos deste sal. Nutrientes nitrogenados foram enriquecidos, indicando que o MAR muda a dinâmica da água. Alternativamente, as ilhas próximas do navio também podem estar trabalhando como recifes, aumentando a concentração. Embora não tenha havido variação espacial significativa, mudanças sazonais controladas principalmente por direções atuais, rotas frias de entrada frontal e as chuvas foram encontradas, com uma influência menor da atividade biológica. Palavras-chave:Clorofila-a (Chl a); Guarapari; Nutrientes; Correntes; Afloramento. AbstractThe objective of this study was to evaluate the temporal and spatial nutrient distribution around the marine artificial reef (MAR) Victory 8B, a ship purposely sunk at Guarapari (20°40' S and 40°30' W), Espírito Santo State, in one of the richest marine biodiversity areas on the Brazilian coast. Eight trimestral one-day cruises were carried out from March 2005 to April 2007. Samples were collected at 12 different stations around the ship for the analysis of dissolved inorganic nutrients (nitrite, nitrate, reactive silicon and orthophosphate), chlorophyll a, phaeopigments, salinity and temperature. Orthophosphate correlations to chlorophyll a may indicate that it is limiting. Its concentrations were always low, which may be due to carbonate sedimentation, as the area is rich in calcium carbonate sediment. Nitrogenous nutrients were enriched, indicating that the MAR changes the water dynamics. Alternatively, islands nearby the ship may also be working as reefs to increase the concentration. Although there was no statistically significant spatial variation, seasonal changes controlled mainly by current directions, cold front entrance routes and rainfall were found, with a minor influence of biological activity.

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Section: Resultsmentioning

confidence: 73%

Controls on Temporal and Spatial Variation of Nutrients in a Tropical Marine Artificial Reef: The Case of the Victory 8B on the Southeastern Brazilian Coast

Costa¹,

Andrade²,

Bazoni³

et al. 2014

Revista Virtual De Química

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“…Artificial Reef (AR) technology was strictly oriented towards improving commercial fishing (STONE et al, 1991) from the 1930s, when the Japanese government invested in large scale artificial reefs, until the 1990´s. The first three International Conferences on Artificial Reefs and Related Aquatic Habitats (CARAH) focused on the improvement of fisheries around the world (SEAMAN; SPRAGUE, 1991;GROVE;WILSON, 1994). However, over the last twenty years, the expansion and diversification of AR use has resulted in a shift in the focus of AR-based research towards a more ecosystematic approach (largely due to advances in SCUBA), focusing on a better understanding of the AR's ecological function and its effect on marine benthic and fish communities (JENSEN, 2002;BORTONE et al, 2011).…”

mentioning

confidence: 99%

“…The presence of these man-made reef structures will affect: i) nearby sandy areas and also ii) water column processes in the vicinity of ARs. Habitat linkages among distinct reef compartments are driven by hydrological processes (changes in water flow patterns), sediment type, geomorphological, chemicalphysical and biological processes (FABI et al, 2002;KIRKE, 2003;DEDIEU et al, 2007;FALCÃO et al, 2007FALCÃO et al, , 2009) and also biotic processes (YANAGI;NAKAJIMA, 1991;LINDQUIST et al, 1994;PEPE et al, 1998;SHENG, 2000;DALE;PREGO, 2002;POLUNIN, 2001;FABI et al 2006;EINBINDER et al, 2006). AR structures can affect biological processes differently within different reef compartments.…”

mentioning

confidence: 99%

“…Deposition of biomass in the lee of the reefs favours benthic remineralization, promoting nutrient regeneration in pore water (FABI et al, 2002;DEDIEU et al, 2007). Sediment nutrient enhancement from deposited organic material can be incorporated into the reef food web, enhancing sandy benthic production which contributes to the rehabilitation of sandy coastal areas via sediment chemical trophic chain pull-out (FALCÃO et al, 2007(FALCÃO et al, , 2009). The biochemical role of ARs in this respect is particularly important in shallow coastal areas (less than 50 m deep), where productivity in the overlying water column is heavily reliant on the sediment system, with up to 80% of phytoplanktonic nitrogen requirements coming from bacterial regeneration of organic matter within the seabed (DALE; PREGO, 2002).…”

mentioning

confidence: 99%

“…This promotes upwelling (YANAGI; NAKAJIMA, 1991;KIRKE, 2003;MARUYAMA, 2004), bringing nutrient rich AR bottom benthic waters (compared to control areas, see: HAROUN et al, 1994;AMBROSE;ANDERSON, 1990;FALCÃO et al, 2007FALCÃO et al, , 2009) into the water column, thereby enhancing biological production (RELINI et al, 1994;PERKOL-FINKEL;BENAYAHU, 2005). Planktonic community development in the areas surrounding ARs has been found to be in accordance with nutrients (ammonium, organic nitrogen) and particulate organic matter (POM) time evolution series (YANAGI; NAKAJIMA, 1991;FALCÃO et al, 2007FALCÃO et al, , 2009). There is also evidence suggesting that increased phytoplankton production and diversity promote microzooplankton diversity (HUTCHINSON, 1961).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Artificial reefs: from ecological processes to fishing enhancement tools

Leitão

2013

Braz. j. oceanogr.

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Nutrient dynamics, carbon storage and community composition on artificial and natural reefs in Bali, Indonesia

Boakes,

Suryaputra,

Hall

et al. 2023

Mar Biol

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Artificial reefs are now commonly used as a tool to restore degraded coral reefs and have a proven potential to enhance biodiversity. Despite this, there is currently a limited understanding of ecosystem functioning on artificial reefs, and how this compares to natural reefs. We used water sampling (bottom water sampling and pore water sampling), as well as surface sediment sampling and sediment traps, to examine the storage of total organic matter (as a measure of total organic carbon) and dynamics of dissolved inorganic nitrate, nitrite, phosphate and ammonium. These biogeochemical parameters were used as measures of ecosystem functioning, which were compared between an artificial reef and natural coral reef, as well as a degraded sand flat (as a control habitat), in Bali, Indonesia. We also linked the differences in these parameters to observable changes in the community structure of mobile, cryptobenthic and benthic organisms between habitat types. Our key findings showed: (1) there were no significant differences in inorganic nutrients between habitat types for bottom water samples, (2) pore water phosphate concentrations were significantly higher on the artificial reef than on both other habitats, (3) total organic matter content in sediments was significantly higher on the coral reef than both other habitat types, and (4) total organic matter in sediment traps in sampling periods May and September were higher on coral reefs than other habitats, but no differences were found in November. Overall, in terms of ecosystem functioning (specifically nutrient storage and dynamics), the artificial reef showed differences from the nearby degraded sand flat, and appeared to have some similarities with the coral reef. However, it was shown to not yet be fully functioning as the coral reef, which we hypothesise is due its relatively less complex benthic community and different fish community. We highlight the need for longer term studies on artificial reef functioning, to assess if these habitats can replace the ecological function of coral reefs at a local level.

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Biogeochemical processes and nutrient cycling within an artificial reef off Southern Portugal

Cited by 54 publications

References 30 publications

Controls on Temporal and Spatial Variation of Nutrients in a Tropical Marine Artificial Reef: The Case of the Victory 8B on the Southeastern Brazilian Coast

Controls on Temporal and Spatial Variation of Nutrients in a Tropical Marine Artificial Reef: The Case of the Victory 8B on the Southeastern Brazilian Coast

Artificial reefs: from ecological processes to fishing enhancement tools

Nutrient dynamics, carbon storage and community composition on artificial and natural reefs in Bali, Indonesia

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