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| Yuras,Gabriel; Ulloa,Osvaldo; Letelier,Ricardo; Pizarro,Oscar. |
| Satellite - derived oceanographic parameters were used to explain the coastal and oceanic behavior of the chlorophyll concentration (CHL) in Chilean waters (18°-40°S, coast- 900 km offshore). CHL shows two different regimens of the annual cycle, the closer to the shore one with a austral summer maximum in concordance to the upwelling and wind regimes; and an offshore one with a CHL maximum in winter time. The annual cycle is stronger in a thin band (20 km) close to the shore and in the oceanic zone, where it counts for more of the 80% of the variability present. There is a band, which varies with latitude, located between 100-200 km from coast where the annual cycle is not well resolved by the 100 km data bins used in this study. A EOF analysis of 9km... |
| Tipo: Journal article |
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| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300056 |
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| Ulloa,Osvaldo; Belmar,Lucy; Farías,Laura; Castro-González,Maribel; Galán,Alexander; Lavín,Paris; Molina,Verónica; Ramírez,Salvador; Santibáñez,Francisco; Stevens,Heike. |
| In recent years, our group has been studying the microbial communities of the water column associated with the oxygen minimum zone (OMZ) off northern Chile and Peru, trying to understand who the main players are in the OMZ biogeochemical cycles and which metabolic strategies they are using. For that, we are combining flow cytometry, molecular techniques and biogeochemical approaches. Most of our work, so far, has focused on microbes capable of doing oxygenic photosynthesis, such as the cyanobacteria, and those involved in the nitrogen cycle, such as the denitrifying, nitrifying and anammox bacteria. We have also started to look at the more general microbial abundance and diversity. In each case, we are finding that the OMZ holds distinct microbial... |
| Tipo: Journal article |
Palavras-chave: Oxygen minimum zone; Microbial diversity; Nitrogen cycle. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300018 |
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