Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2003
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.740028 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867168555523375104 |
|---|---|
| author | Neveux, Jacques Dupouy, Cécile Blanchot, Jean Le Bouteiller, Aubert Landry, Michael R Brown, Susan L |
| author_facet | Neveux, Jacques Dupouy, Cécile Blanchot, Jean Le Bouteiller, Aubert Landry, Michael R Brown, Susan L |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In situ diel variations of extracted chlorophyllous pigments, beam attenuation by particles (c p), and in vivo chlorophyll fluorescence (F iv) were investigated during a 5-day time series in high-nutrient, low-chlorophyll waters of the equatorial Pacific (date line = 180°). Samples were taken hourly at 10 depths in the upper 100 m during the first 48 hours, then sampling frequency decreased to 3 hours. In the 30-70 m layer the integrated chlorophyll concentrations, c p, and F iv increased during the light period, but the minima and, especially, maxima were not fully synchronized. The lowest values of total chlorophyll a (Tchl a = chlorophyll a + divinyl-chlorophyll a) occurred around 5-6 hours, slightly (0-2 hours) before that of c p and F iv. Tchl a reached a maximum around 1500 hours ± 1 hour, clearly before c p (1700 hours) and F iv (1900 hours). In the 0-30 m layer, diel variations of the integrated chlorophyll concentrations, c p, and F iv were clearly out of phase. They showed a nocturnal increase in Tchl a, starting around midnight and peaking in early morning (0900 hours). In contrast, c p increased only during the light period in the upper 30 m, and variations of F iv were largely opposite to those of extracted Tchl a. Specific phytoplankton growth (µ0) and grazing loss (g) rates were estimated from diel variations in the 30-70 m layer and compared to independent rate estimates from experimental incubations. These results are discussed in the context of physical processes and physiological responses of the cells to the daily photocycle. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_740028 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Vertical distribution of phytoplankton pigments at EBENE cruise stations Neveux, Jacques Dupouy, Cécile Blanchot, Jean Le Bouteiller, Aubert Landry, Michael R Brown, Susan L Biogeochemical Processes in the Oceans and Fluxes; CTD/Rosette; CTD-RO; EBENE; EBENE_001; EBENE_002; EBENE_003; EBENE_004; EBENE_005; EBENE_006; EBENE_007; EBENE_008; EBENE_009; EBENE_010; EBENE_011; EBENE_012; EBENE_013; EBENE_014; EBENE_015; EBENE_016; EBENE_017; EBENE_018; EBENE_019; EBENE_020; EBENE_021; EBENE_022; EBENE_023; EBENE_024; EBENE_025; EBENE_026; EBENE_027; EBENE_028; EBENE_029; EBENE_030; EBENE_031; EBENE_032; EBENE_033; EBENE_034; EBENE_035; EBENE_036; EBENE_037; EBENE_038; EBENE_039; EBENE_040; EBENE_041; EBENE_042; EBENE_043; EBENE_044; EBENE_045; EBENE_046; EBENE_047; EBENE_048; EBENE_049; EBENE_050; EBENE_051; EBENE_052; EBENE_053; EBENE_057; EBENE_060; EBENE_061; EBENE_062; EBENE_063; EBENE_064; EBENE_065; EBENE_066; EBENE_067; EBENE_068; EBENE_069; EBENE_070; EBENE_071; EBENE_072; EBENE_073; EBENE_074; EBENE_075; EBENE_076; EBENE_077; EBENE_078; EBENE_079; EBENE_080; EBENE_081; EBENE_082; EBENE_083; EBENE_084; EBENE_085; EBENE_086; EBENE_087; EBENE_088; EBENE_089; EBENE_090; EBENE_091; EBENE_092; EBENE_093; EBENE_094; EBENE_095; EBENE_096; EBENE_097; EBENE_098; EBENE_099; EBENE_100; EBENE_101; EBENE_102; EBENE_103; EBENE_104; EBENE_105; EBENE_106; EBENE_107; EBENE_108; EBENE_109; EBENE_110; EBENE_111; EBENE_112; EBENE_113; EBENE_114; EBENE_115; EBENE_116; EBENE_117; EBENE_118; EBENE_119; EBENE_120; EBENE_121; EBENE_122; EBENE_123; EBENE_124; EBENE_125; EBENE_126; EBENE_127; EBENE_128; EBENE_129; EBENE_130; EBENE_131; EBENE_132; EBENE_133; EBENE_134; EBENE_135; EBENE_136; EBENE_137; EBENE_138; EBENE_139; EBENE_140; EBENE_141; EBENE_142; EBENE_143; EBENE_144; EBENE_145; EBENE_146; EBENE_147; Equatorial Pacific; JGOFS; Joint Global Ocean Flux Study; L Atalante; PROOF In situ diel variations of extracted chlorophyllous pigments, beam attenuation by particles (c p), and in vivo chlorophyll fluorescence (F iv) were investigated during a 5-day time series in high-nutrient, low-chlorophyll waters of the equatorial Pacific (date line = 180°). Samples were taken hourly at 10 depths in the upper 100 m during the first 48 hours, then sampling frequency decreased to 3 hours. In the 30-70 m layer the integrated chlorophyll concentrations, c p, and F iv increased during the light period, but the minima and, especially, maxima were not fully synchronized. The lowest values of total chlorophyll a (Tchl a = chlorophyll a + divinyl-chlorophyll a) occurred around 5-6 hours, slightly (0-2 hours) before that of c p and F iv. Tchl a reached a maximum around 1500 hours ± 1 hour, clearly before c p (1700 hours) and F iv (1900 hours). In the 0-30 m layer, diel variations of the integrated chlorophyll concentrations, c p, and F iv were clearly out of phase. They showed a nocturnal increase in Tchl a, starting around midnight and peaking in early morning (0900 hours). In contrast, c p increased only during the light period in the upper 30 m, and variations of F iv were largely opposite to those of extracted Tchl a. Specific phytoplankton growth (µ0) and grazing loss (g) rates were estimated from diel variations in the 30-70 m layer and compared to independent rate estimates from experimental incubations. These results are discussed in the context of physical processes and physiological responses of the cells to the daily photocycle. |
| title | Vertical distribution of phytoplankton pigments at EBENE cruise stations |
| topic | Biogeochemical Processes in the Oceans and Fluxes; CTD/Rosette; CTD-RO; EBENE; EBENE_001; EBENE_002; EBENE_003; EBENE_004; EBENE_005; EBENE_006; EBENE_007; EBENE_008; EBENE_009; EBENE_010; EBENE_011; EBENE_012; EBENE_013; EBENE_014; EBENE_015; EBENE_016; EBENE_017; EBENE_018; EBENE_019; EBENE_020; EBENE_021; EBENE_022; EBENE_023; EBENE_024; EBENE_025; EBENE_026; EBENE_027; EBENE_028; EBENE_029; EBENE_030; EBENE_031; EBENE_032; EBENE_033; EBENE_034; EBENE_035; EBENE_036; EBENE_037; EBENE_038; EBENE_039; EBENE_040; EBENE_041; EBENE_042; EBENE_043; EBENE_044; EBENE_045; EBENE_046; EBENE_047; EBENE_048; EBENE_049; EBENE_050; EBENE_051; EBENE_052; EBENE_053; EBENE_057; EBENE_060; EBENE_061; EBENE_062; EBENE_063; EBENE_064; EBENE_065; EBENE_066; EBENE_067; EBENE_068; EBENE_069; EBENE_070; EBENE_071; EBENE_072; EBENE_073; EBENE_074; EBENE_075; EBENE_076; EBENE_077; EBENE_078; EBENE_079; EBENE_080; EBENE_081; EBENE_082; EBENE_083; EBENE_084; EBENE_085; EBENE_086; EBENE_087; EBENE_088; EBENE_089; EBENE_090; EBENE_091; EBENE_092; EBENE_093; EBENE_094; EBENE_095; EBENE_096; EBENE_097; EBENE_098; EBENE_099; EBENE_100; EBENE_101; EBENE_102; EBENE_103; EBENE_104; EBENE_105; EBENE_106; EBENE_107; EBENE_108; EBENE_109; EBENE_110; EBENE_111; EBENE_112; EBENE_113; EBENE_114; EBENE_115; EBENE_116; EBENE_117; EBENE_118; EBENE_119; EBENE_120; EBENE_121; EBENE_122; EBENE_123; EBENE_124; EBENE_125; EBENE_126; EBENE_127; EBENE_128; EBENE_129; EBENE_130; EBENE_131; EBENE_132; EBENE_133; EBENE_134; EBENE_135; EBENE_136; EBENE_137; EBENE_138; EBENE_139; EBENE_140; EBENE_141; EBENE_142; EBENE_143; EBENE_144; EBENE_145; EBENE_146; EBENE_147; Equatorial Pacific; JGOFS; Joint Global Ocean Flux Study; L Atalante; PROOF |
| url | https://doi.org/10.1594/PANGAEA.740028 |