Carbon dioxide assimilation rate, gas and ion composition in samples, and bacterial production of organic matter within and above the Broken Spur and TAG hydrothermal fields, Mid-Atlantic Ridge
Cobertura |
MEDIAN LATITUDE: 27.594840 * MEDIAN LONGITUDE: -44.031560 * SOUTH-BOUND LATITUDE: 26.120600 * WEST-BOUND LONGITUDE: -44.844500 * NORTH-BOUND LATITUDE: 29.197100 * EAST-BOUND LONGITUDE: -43.151700 * DATE/TIME START: 1994-09-17T00:00:00 * DATE/TIME END: 1994-09-17T00:00:00 |
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Data(s) |
05/05/1997
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Resumo |
Rate of CO2 assimilation was determined above the Broken Spur and TAG active hydrothermal fields for three main ecosystems: (1) hydrothermal vents; (2) 300 m near-bottom layer of plume water; and (3) bottom sediments. In water samples from warm (40-45°C) vents assimilation rates were maximal and reached 2.82-3.76 µg C/l/day. In plume waters CO2 assimilation rates ranged from 0.38 to 0.65 µg C/l/day. In bottom sediments CO2 assimilation rates varied from 0.8 to 28.0 µg C/l/day, rising up to 56 mg C/kg/day near shrimp swarms. In the most active plume zone of the long-living TAG field bacterial production of organic matter (OM) from carbonic is up to 170 mg C/m**2/day); production of autotrophic process of bacterial chemosynthesis reaches about 90% (156 mg C/m**2/day). Thus, chemosynthetic production of OM in September-October is almost equal to that of photosynthetic production in the oceanic region. Bacterial production of OM above the Broken Spur hydrothermal field is one order lower and reaches only 20 mg C/m**2/day. |
Formato |
application/zip, 8 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.760070 doi:10.1594/PANGAEA.760070 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Lein, Alla Yu; Pimenov, Nikolay V; Vinogradov, Mikhail E; Ivanov, Mikhail V (1997): CO2 assimilation rate and bacterial production of organic matter above the hydrothermal fields at 26°N and 29°N at the Mid-Atlantic Ridge. Translated from Okeanologiya, 1997, 37(3), 396-407, Oceanology, 37(3), 359-369 |
Palavras-Chave | #[NH4]+; 14Carbon dioxide, assimilation rate; 14CO2 ass r; 14C uptake; 1 mmol Na2S2O3 added; 1 mmol Na2S added; 1 mmol NH4Cl added; 5 mg/l azide added; Akademik Mstislav Keldysh; AMK34; AMK34-3335; AMK34-3338; AMK34-3347; AMK34-3348_3; AMK34-3348_HD; AMK34-3348_SH; AMK34-3350; AMK34-3358; AMK34-3368; AMK34-3370; AMK34-3383; AMK34-3385; AMK34-3388; AMK34-3389; AMK34-3393; AMK34-3404; AMK34-3415; AMK34-3421; AMK34-3424; AMK34-3425; AMK34-3426_UHS; Ammonium; Archive of Ocean Data; ARCOD; Area; Area/locality; autotrophic assimilation (chemosynthesis); average; Bacteria, production as carbon; Bact prod C; Bottle, Niskin; Broken Spur Hydrothermal Field; Calculated; CH4; Chromatographic; Comment; Depth, bottom/max; Depth, top/min; DEPTH, water; Depth bot; Depth top; Depth water; Device; Device type; Event; H2; H2S; Hydrogen; Hydrogen sulphide; max; Methane; Mid Atlantic Ridge; min; MULT; Multiple investigations; NIS; Nitrate; NO3; NOBS; nothing added; Number of observations; Sample type; Samp type; SG; Slurp Gun; TAG Hydrothermal Field; TiB; Titan Bottle; Titration |
Tipo |
Dataset |