Seawater carbonate chemistry and community calcification during Reunion Island coral reef community study, 2007
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| Format: | Dataset Open Access |
| Sprache: | en |
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2007
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| _version_ | 1867169963231412224 |
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| author | Taddei, Dorothée Bucas, G Clavier, Jacques Cuet, Pascale Frouin, P |
| author_facet | Taddei, Dorothée Bucas, G Clavier, Jacques Cuet, Pascale Frouin, P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | To assess the contribution of soft-bottoms to the carbon cycle in coral reefs, the net community production (p) was measured in winter at 3 stations on La Saline inner reef flat (Reunion Island). Changes in pH and total alkalinity at different irradiances (I) were assessed using benthic chambers (0.2 m2) during a 1-h incubation. Mean grain size, the silt and clay load and chlorophyll a content of the sediments were analysed in each chamber. Daily community production (P), gross community production (Pg) and community respiration (R) were estimated from p-I curves and daily irradiance variations (PAR, 400-700 nm). Sediment characteristics and chlorophyll a contents did not differ between the three sites, except for the silt and clay fraction at one station. R being higher than Pg (84.88 ± 7.36 and -62.29 ± 3.34 mmolC m-2 d-1 respectively), P value reached 22.59 ± 5.66 mmolC m-2 d-1. The sediments were therefore heterotrophic with a mean Pg/R lower than 1 (0.74 ± 0.05) and appear to be a carbon source. Our data suggested the importance of the degradation process in the functioning of near-reef sediments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_721964 |
| institution | PANGAEA |
| language | en |
| publishDate | 2007 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and community calcification during Reunion Island coral reef community study, 2007 Taddei, Dorothée Bucas, G Clavier, Jacques Cuet, Pascale Frouin, P Alkalinity, potentiometric; Alkalinity, total; Alkalinity anomaly technique (Smith and Key, 1975); Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; DATE/TIME; Entire community; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; EXP; Experiment; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Indian Ocean; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; PAR sensor LI-1400, LI-COR Inc.; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, Electrode; Radiation, photosynthetically active; Salinity; Sample ID; Soft-bottom community; Taddei_etal_07; Temperature, water; Tropical; YSI 6920 salinity/conductivity/temperature meter To assess the contribution of soft-bottoms to the carbon cycle in coral reefs, the net community production (p) was measured in winter at 3 stations on La Saline inner reef flat (Reunion Island). Changes in pH and total alkalinity at different irradiances (I) were assessed using benthic chambers (0.2 m2) during a 1-h incubation. Mean grain size, the silt and clay load and chlorophyll a content of the sediments were analysed in each chamber. Daily community production (P), gross community production (Pg) and community respiration (R) were estimated from p-I curves and daily irradiance variations (PAR, 400-700 nm). Sediment characteristics and chlorophyll a contents did not differ between the three sites, except for the silt and clay fraction at one station. R being higher than Pg (84.88 ± 7.36 and -62.29 ± 3.34 mmolC m-2 d-1 respectively), P value reached 22.59 ± 5.66 mmolC m-2 d-1. The sediments were therefore heterotrophic with a mean Pg/R lower than 1 (0.74 ± 0.05) and appear to be a carbon source. Our data suggested the importance of the degradation process in the functioning of near-reef sediments. |
| title | Seawater carbonate chemistry and community calcification during Reunion Island coral reef community study, 2007 |
| topic | Alkalinity, potentiometric; Alkalinity, total; Alkalinity anomaly technique (Smith and Key, 1975); Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; DATE/TIME; Entire community; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; EXP; Experiment; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Indian Ocean; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; PAR sensor LI-1400, LI-COR Inc.; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, Electrode; Radiation, photosynthetically active; Salinity; Sample ID; Soft-bottom community; Taddei_etal_07; Temperature, water; Tropical; YSI 6920 salinity/conductivity/temperature meter |
| url | https://doi.org/10.1594/PANGAEA.721964 |