Primary production at time series station DYFAMED
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2002
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| _version_ | 1867167663496626176 |
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| author | Marty, Jean-Claude Chiavérini, Jacques |
| author_facet | Marty, Jean-Claude Chiavérini, Jacques |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Phytoplankton carbon assimilation has been measured near monthly using the 14C method at DYFAMED France JGOFS time-series station from 1993 to 1999. Data were obtained using the “LET GO” technique, which allowed in situ injection of bicarbonate and incubation in enclosures at 10 depths. Incubation duration was 4 h around noon, from which daily production was estimated. The seasonal variation of the depth-integrated carbon assimilation exhibits a marked cycle. Maximum values reach 1.8 g C/m**2/d in March or April; constant lower values were observed from August to January, in the range 100-300 mg C/m**2/d. The annual primary production vary in the range 86-232 g C/m**2/yr, in the upper range of older estimations. Primary production normalized to chlorophyll a shows maximum values in the period of oligotrophy. This increase of carbon assimilation rate per unit of chlorophyll a appears as linked to the period of phosphorus-limited ecosystem, and vertical distribution of taxonomic pigments suggests a possible role of cyanobacteria. Potential export production has been estimated from primary production data and Fp ratio based on pigments concentrations. These estimates (which imply biological steady state conditions) vary in a wide range, from 19 to 71 g C/m**2/yr. There is a decoupling between years with high potential export production and years with high measured particulate fluxes, which highlights the question of balance by resupply of the limiting nutrients and the role of dissolved organic carbon. A possible shift of primary production towards a more regeneration-dominated system is suggested for recent years. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_738606 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Primary production at time series station DYFAMED Marty, Jean-Claude Chiavérini, Jacques Biogeochemical Processes in the Oceans and Fluxes; DYFAMED__Campaign; DYFAMED_LetGo_19930706; DYFAMED_LetGo_19930907; DYFAMED_LetGo_19931004; DYFAMED_LetGo_19931108; DYFAMED_LetGo_19931206; DYFAMED_LetGo_19940112; DYFAMED_LetGo_19940201; DYFAMED_LetGo_19940209; DYFAMED_LetGo_19940304; DYFAMED_LetGo_19940407; DYFAMED_LetGo_19940428; DYFAMED_LetGo_19940602; DYFAMED_LetGo_19940705; DYFAMED_LetGo_19940821; DYFAMED_LetGo_19940925; DYFAMED_LetGo_19941015; DYFAMED_LetGo_19941120; DYFAMED_LetGo_19950117; DYFAMED_LetGo_19950210; DYFAMED_LetGo_19950309; DYFAMED_LetGo_19950402; DYFAMED_LetGo_19950511; DYFAMED_LetGo_19950512; DYFAMED_LetGo_19950514; DYFAMED_LetGo_19950515; DYFAMED_LetGo_19950527; DYFAMED_LetGo_19950528; DYFAMED_LetGo_19950530; DYFAMED_LetGo_19950608; DYFAMED_LetGo_19950707; DYFAMED_LetGo_19950708; DYFAMED_LetGo_19950914; DYFAMED_LetGo_19951005; DYFAMED_LetGo_19960301; DYFAMED_LetGo_19960405; DYFAMED_LetGo_19960523; DYFAMED_LetGo_19960614; DYFAMED_LetGo_19960710; DYFAMED_LetGo_19961001; DYFAMED_LetGo_19961203; DYFAMED_LetGo_19970113; DYFAMED_LetGo_19970223; DYFAMED_LetGo_19970302; DYFAMED_LetGo_19970415; DYFAMED_LetGo_19970515; DYFAMED_LetGo_19970712; DYFAMED_LetGo_19970901; DYFAMED_LetGo_19971118; DYFAMED_LetGo_19980206; DYFAMED_LetGo_19980316; DYFAMED_LetGo_19980506; DYFAMED_LetGo_19980507; DYFAMED_LetGo_19980722; DYFAMED_LetGo_19980904; DYFAMED_LetGo_19990204; DYFAMED_LetGo_19990319; DYFAMED_LetGo_19990411; DYFAMED_LetGo_19990515; DYFAMED_LetGo_19990612; DYFAMED_LetGo_19990614; DYFAMED_LetGo_19990710; DYFAMED_LetGo_19990828; DYFAMED_LetGo_19990909; DYFAMED_LetGo_19991028; DYFAMED_LetGo_19991218; JGOFS; Joint Global Ocean Flux Study; LETGO; Let Go; MEDAR/MEDATLAS; Mediterranean Data Archaeology and Rescue; PROOF; Time-series station Phytoplankton carbon assimilation has been measured near monthly using the 14C method at DYFAMED France JGOFS time-series station from 1993 to 1999. Data were obtained using the “LET GO” technique, which allowed in situ injection of bicarbonate and incubation in enclosures at 10 depths. Incubation duration was 4 h around noon, from which daily production was estimated. The seasonal variation of the depth-integrated carbon assimilation exhibits a marked cycle. Maximum values reach 1.8 g C/m**2/d in March or April; constant lower values were observed from August to January, in the range 100-300 mg C/m**2/d. The annual primary production vary in the range 86-232 g C/m**2/yr, in the upper range of older estimations. Primary production normalized to chlorophyll a shows maximum values in the period of oligotrophy. This increase of carbon assimilation rate per unit of chlorophyll a appears as linked to the period of phosphorus-limited ecosystem, and vertical distribution of taxonomic pigments suggests a possible role of cyanobacteria. Potential export production has been estimated from primary production data and Fp ratio based on pigments concentrations. These estimates (which imply biological steady state conditions) vary in a wide range, from 19 to 71 g C/m**2/yr. There is a decoupling between years with high potential export production and years with high measured particulate fluxes, which highlights the question of balance by resupply of the limiting nutrients and the role of dissolved organic carbon. A possible shift of primary production towards a more regeneration-dominated system is suggested for recent years. |
| title | Primary production at time series station DYFAMED |
| topic | Biogeochemical Processes in the Oceans and Fluxes; DYFAMED__Campaign; DYFAMED_LetGo_19930706; DYFAMED_LetGo_19930907; DYFAMED_LetGo_19931004; DYFAMED_LetGo_19931108; DYFAMED_LetGo_19931206; DYFAMED_LetGo_19940112; DYFAMED_LetGo_19940201; DYFAMED_LetGo_19940209; DYFAMED_LetGo_19940304; DYFAMED_LetGo_19940407; DYFAMED_LetGo_19940428; DYFAMED_LetGo_19940602; DYFAMED_LetGo_19940705; DYFAMED_LetGo_19940821; DYFAMED_LetGo_19940925; DYFAMED_LetGo_19941015; DYFAMED_LetGo_19941120; DYFAMED_LetGo_19950117; DYFAMED_LetGo_19950210; DYFAMED_LetGo_19950309; DYFAMED_LetGo_19950402; DYFAMED_LetGo_19950511; DYFAMED_LetGo_19950512; DYFAMED_LetGo_19950514; DYFAMED_LetGo_19950515; DYFAMED_LetGo_19950527; DYFAMED_LetGo_19950528; DYFAMED_LetGo_19950530; DYFAMED_LetGo_19950608; DYFAMED_LetGo_19950707; DYFAMED_LetGo_19950708; DYFAMED_LetGo_19950914; DYFAMED_LetGo_19951005; DYFAMED_LetGo_19960301; DYFAMED_LetGo_19960405; DYFAMED_LetGo_19960523; DYFAMED_LetGo_19960614; DYFAMED_LetGo_19960710; DYFAMED_LetGo_19961001; DYFAMED_LetGo_19961203; DYFAMED_LetGo_19970113; DYFAMED_LetGo_19970223; DYFAMED_LetGo_19970302; DYFAMED_LetGo_19970415; DYFAMED_LetGo_19970515; DYFAMED_LetGo_19970712; DYFAMED_LetGo_19970901; DYFAMED_LetGo_19971118; DYFAMED_LetGo_19980206; DYFAMED_LetGo_19980316; DYFAMED_LetGo_19980506; DYFAMED_LetGo_19980507; DYFAMED_LetGo_19980722; DYFAMED_LetGo_19980904; DYFAMED_LetGo_19990204; DYFAMED_LetGo_19990319; DYFAMED_LetGo_19990411; DYFAMED_LetGo_19990515; DYFAMED_LetGo_19990612; DYFAMED_LetGo_19990614; DYFAMED_LetGo_19990710; DYFAMED_LetGo_19990828; DYFAMED_LetGo_19990909; DYFAMED_LetGo_19991028; DYFAMED_LetGo_19991218; JGOFS; Joint Global Ocean Flux Study; LETGO; Let Go; MEDAR/MEDATLAS; Mediterranean Data Archaeology and Rescue; PROOF; Time-series station |
| url | https://doi.org/10.1594/PANGAEA.738606 |