Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California
From June 25 to July 10 of 1986 temperature, salinity, dissolved oxygen, nutrients, chlorophyll a and primary productivity were determined daily at one station off Punta Banda, Baja California. Hydrographic variables suggested that coastal upwelling events were present at the beginning and at the e...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidad Autónoma de Baja California
1991-03-01
|
| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/824 |
| _version_ | 1797278681160220672 |
|---|---|
| author | AT González-Morales G Gaxiola-Castro |
| author_facet | AT González-Morales G Gaxiola-Castro |
| author_sort | AT González-Morales |
| collection | DOAJ |
| description |
From June 25 to July 10 of 1986 temperature, salinity, dissolved oxygen, nutrients, chlorophyll a and primary productivity were determined daily at one station off Punta Banda, Baja California. Hydrographic variables suggested that coastal upwelling events were present at the beginning and at the end of the period studied, with a relaxation period in the middle and weak upwelling before July 10. During strong upwelling events surface values of temperature, salinity, dissolved oxygen and phosphate were: 13 to 14ºC, 33.65 to 33.70‰, 4.0 to 5.0 ml/l and between 0.95 to 1.25 µM, respectively. We found low chlorophyll a and primary productivity values as a result of unadapted phytoplankton as well as strong mixing of water in the area. Higher chlorophyll a and primary productivity values were measured at the beginning of the relaxation period; with 4.8 mg.m–3 of chlorophyll a and 3.6 mgCm–3.h–1 of primary production. The phytoplankton size fraction <8 µm was dominant in biomass and prirnary productivity, except during strong upwelling events when the phytoplankton size fraction >8 µm contributed more to biomass and primary production.
|
| first_indexed | 2024-03-07T16:11:48Z |
| format | Article |
| id | doaj.art-3438c11a02e8433985c0b789b8ffc574 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:11:48Z |
| publishDate | 1991-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-3438c11a02e8433985c0b789b8ffc5742024-03-04T16:44:08ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90531991-03-0117310.7773/cm.v17i3.824Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja CaliforniaAT González-Morales0G Gaxiola-Castro1Instituto Tecnológico del MarCentro de Investigación Científica y de Educación Superior de Ensenada From June 25 to July 10 of 1986 temperature, salinity, dissolved oxygen, nutrients, chlorophyll a and primary productivity were determined daily at one station off Punta Banda, Baja California. Hydrographic variables suggested that coastal upwelling events were present at the beginning and at the end of the period studied, with a relaxation period in the middle and weak upwelling before July 10. During strong upwelling events surface values of temperature, salinity, dissolved oxygen and phosphate were: 13 to 14ºC, 33.65 to 33.70‰, 4.0 to 5.0 ml/l and between 0.95 to 1.25 µM, respectively. We found low chlorophyll a and primary productivity values as a result of unadapted phytoplankton as well as strong mixing of water in the area. Higher chlorophyll a and primary productivity values were measured at the beginning of the relaxation period; with 4.8 mg.m–3 of chlorophyll a and 3.6 mgCm–3.h–1 of primary production. The phytoplankton size fraction <8 µm was dominant in biomass and prirnary productivity, except during strong upwelling events when the phytoplankton size fraction >8 µm contributed more to biomass and primary production. http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/824n/a |
| spellingShingle | AT González-Morales G Gaxiola-Castro Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California Ciencias Marinas n/a |
| title | Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California |
| title_full | Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California |
| title_fullStr | Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California |
| title_full_unstemmed | Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California |
| title_short | Daily variation of physico-chemical characteristics, biomass and phytoplankton primary production in an upwelling coastal zone of Baja California |
| title_sort | daily variation of physico chemical characteristics biomass and phytoplankton primary production in an upwelling coastal zone of baja california |
| topic | n/a |
| url | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/824 |
| work_keys_str_mv | AT atgonzalezmorales dailyvariationofphysicochemicalcharacteristicsbiomassandphytoplanktonprimaryproductioninanupwellingcoastalzoneofbajacalifornia AT ggaxiolacastro dailyvariationofphysicochemicalcharacteristicsbiomassandphytoplanktonprimaryproductioninanupwellingcoastalzoneofbajacalifornia |