Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters
We measured the vertical and seasonal distribution of picoplankton (0.2-2 µm) and nanoplankton (2-20 µm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was estimated by epifluorescence microscopy. Heterotrophic components from the diffe...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidad de Costa Rica
2007-06-01
|
| Series: | Revista de Biología Tropical |
| Subjects: | |
| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200010 |
| _version_ | 1827199812261380096 |
|---|---|
| author | Gladys Margarita Lugioyo Sandra Loza Paulo C Abreu |
| author_facet | Gladys Margarita Lugioyo Sandra Loza Paulo C Abreu |
| author_sort | Gladys Margarita Lugioyo |
| collection | DOAJ |
| description | We measured the vertical and seasonal distribution of picoplankton (0.2-2 µm) and nanoplankton (2-20 µm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was estimated by epifluorescence microscopy. Heterotrophic components from the different fractions showed higher vertical stratification in the oceanic station in comparison to the coastal one. The autotrophic components showed an irregular vertical distribution pattern, both in coastal and oceanic stations. In all the analyzed stations, the heterotrophic bacteria showed an inverse correlation with the autotrophic (r= -0.98), and the heterotrophic nanoplankton (r= -0.96). Auto and heterotrophic nanoplankton probably regulate bacteria abundance by predation, although autotrophic nanoplankton may represent a source of organic matter for microorganisms. Rev. Biol. Trop. 55 (2): 449-457. Epub 2007 June, 29.<br>Determinamos la distribución vertical y estacional del picoplancton (0.2-2 µm) y el nanoplancton (2-20 µm) en la capa fótica de las aguas oceánicas y costeras al sur de Cuba. La concentración de las diferentes fracciones fue estimada mediante microscopía de epifluorescencia. Los componentes heterotróficos de las diferentes fracciones mostraron una elevada estratificación vertical en la estación oceánica en comparación con la estación costera. Por otro lado, los componentes autotróficos presentaron un patrón de distribución vertical irregular tanto en la estación costera como en la oceánica. En los análisis realizados las bacterias heterótrofas mostraron una correlación inversa con el nanoplancton autótrofo (r= -0.98), y con el nanoplancton heterótrofo (r= -0.96). Estos resultados sugieren que el nanoplancton (autótrofo y heterótrofo) probablemente regula la abundancia de bacterias mediante la depredación, además que el nanoplancton autótrofo pudiera representar una fuente de materia orgánica para los microorganismos. |
| first_indexed | 2024-03-12T10:48:00Z |
| format | Article |
| id | doaj.art-d435e71d305c4dd08706a8a7b19615d4 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 2215-2075 |
| language | English |
| last_indexed | 2025-03-21T10:38:51Z |
| publishDate | 2007-06-01 |
| publisher | Universidad de Costa Rica |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-d435e71d305c4dd08706a8a7b19615d42024-07-02T21:35:45ZengUniversidad de Costa RicaRevista de Biología Tropical0034-77442215-20752007-06-01552449457Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic watersGladys Margarita LugioyoSandra LozaPaulo C AbreuWe measured the vertical and seasonal distribution of picoplankton (0.2-2 µm) and nanoplankton (2-20 µm) in the photic layer of Cuban southern oceanic and coastal waters. The concentration of the different fractions was estimated by epifluorescence microscopy. Heterotrophic components from the different fractions showed higher vertical stratification in the oceanic station in comparison to the coastal one. The autotrophic components showed an irregular vertical distribution pattern, both in coastal and oceanic stations. In all the analyzed stations, the heterotrophic bacteria showed an inverse correlation with the autotrophic (r= -0.98), and the heterotrophic nanoplankton (r= -0.96). Auto and heterotrophic nanoplankton probably regulate bacteria abundance by predation, although autotrophic nanoplankton may represent a source of organic matter for microorganisms. Rev. Biol. Trop. 55 (2): 449-457. Epub 2007 June, 29.<br>Determinamos la distribución vertical y estacional del picoplancton (0.2-2 µm) y el nanoplancton (2-20 µm) en la capa fótica de las aguas oceánicas y costeras al sur de Cuba. La concentración de las diferentes fracciones fue estimada mediante microscopía de epifluorescencia. Los componentes heterotróficos de las diferentes fracciones mostraron una elevada estratificación vertical en la estación oceánica en comparación con la estación costera. Por otro lado, los componentes autotróficos presentaron un patrón de distribución vertical irregular tanto en la estación costera como en la oceánica. En los análisis realizados las bacterias heterótrofas mostraron una correlación inversa con el nanoplancton autótrofo (r= -0.98), y con el nanoplancton heterótrofo (r= -0.96). Estos resultados sugieren que el nanoplancton (autótrofo y heterótrofo) probablemente regula la abundancia de bacterias mediante la depredación, además que el nanoplancton autótrofo pudiera representar una fuente de materia orgánica para los microorganismos.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200010bacterioplanctonpicoplanctonnanoplanctondistribución vertical y estacionalaguas oceánicasCubaBacterioplanktonpicoplanktonnanoplanktonvertical-seasonal distributionoceanic watersCuba |
| spellingShingle | Gladys Margarita Lugioyo Sandra Loza Paulo C Abreu Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters Revista de Biología Tropical bacterioplancton picoplancton nanoplancton distribución vertical y estacional aguas oceánicas Cuba Bacterioplankton picoplankton nanoplankton vertical-seasonal distribution oceanic waters Cuba |
| title | Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters |
| title_full | Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters |
| title_fullStr | Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters |
| title_full_unstemmed | Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters |
| title_short | Biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in Cuban southern oceanic waters |
| title_sort | biomass distribution of heterotrophic and autotrophic microorganisms of the photic layer in cuban southern oceanic waters |
| topic | bacterioplancton picoplancton nanoplancton distribución vertical y estacional aguas oceánicas Cuba Bacterioplankton picoplankton nanoplankton vertical-seasonal distribution oceanic waters Cuba |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200010 |
| work_keys_str_mv | AT gladysmargaritalugioyo biomassdistributionofheterotrophicandautotrophicmicroorganismsofthephoticlayerincubansouthernoceanicwaters AT sandraloza biomassdistributionofheterotrophicandautotrophicmicroorganismsofthephoticlayerincubansouthernoceanicwaters AT paulocabreu biomassdistributionofheterotrophicandautotrophicmicroorganismsofthephoticlayerincubansouthernoceanicwaters |