El ecosistema de la plataforma patagónica austral durante el verano, marzo-abril 2000. Estimación de la biomasa fitoplanctónica a partir de la distribución de clorofila a
The distribution of chlorophyll-a concentration in the austral Patagonian (SW Atlantic Ocean) shelf between 47º S-54º S with in situ data collected in March-April 2000 is analyzed. Data derived from Niskin samples and continuous in situ fluorometry. Two areas with high chlorophyll values (~- 1.6 mg m-3) on the central shelf corresponding to the area between isolines 100-150 m depth and near the coastal region off Bahía Grande south of the Santa Cruz river (Argentina) were identified. Minimum values (~, 0.5 mg m-3) were found in the coastal zone close to the 50 m isobath and to the southern region of the Patagonian shelf. Fluorescence: chlorophyll-a concentration ratios were more variable at sea surface than at different depths of the water column. The possible causes for the vertical distribution of chlorophyll-a are analyzed.
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| Format: | Journal Contribution biblioteca |
| Language: | Spanish / Castilian |
| Published: |
2010
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| Subjects: | Atlántico Sudoccidental, Argentina, Santa Cruz, Atlántico Sudoccidental, Argentina, Patagonia, Marine environment, Phytoplankton, Chlorophylls, Fluorescence, Vertical distribution, Continental shelves, |
| Online Access: | http://hdl.handle.net/1834/4221 |
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| Summary: | The distribution of chlorophyll-a concentration in the austral Patagonian (SW Atlantic Ocean) shelf between 47º S-54º S with in situ data collected in March-April 2000 is analyzed. Data derived from Niskin samples and continuous in situ fluorometry. Two areas with high chlorophyll values (~- 1.6 mg m-3) on the central shelf corresponding to the area between isolines 100-150 m depth and near the coastal region off Bahía Grande south of the Santa Cruz river (Argentina) were identified. Minimum values (~, 0.5 mg m-3) were found in the coastal zone close to the 50 m isobath and to the southern region of the Patagonian shelf. Fluorescence: chlorophyll-a concentration ratios were more variable at sea surface than at different depths of the water column. The possible causes for the vertical distribution of chlorophyll-a are analyzed. |
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