Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation
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Universidad de Valparaíso
2010
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| author | César Flores-Coto |
| author_facet | César Flores-Coto |
| contents | Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation César Flores-Coto Laura Sanvicente-Añorve Felipe Vázquez-Gutiérrez Marina Sánchez-Ramírez Ciencias de la Tierra turbidity Appendicularians spatial segregation mesoscale distribution The mesoscale spatial distribution of Oikopleura and Fritillaria in the southern Gulf of Mexico was analyzed to know the existence of segregation between them. Samples were taken on 97 stations in the 50 m upper layer. Temperature, salinity and turbidity were measured. The spatial segregation index 'D' was applied to Oikopleura and Fritillaria densities and its significance was tested with Monte Carlo method. Regression Tree (RT) analyses were performed to identify the main environmental factors affecting the distribution of genera. The D index value was 0.67, considered as a high value. RT analyses showed the water turbidity was the main factor affecting the spatial distribution of both genera. Fritillaria was found in turbid waters off the main fluvio-lagoon systems and Oikopleura was most abundant in the up welling waters over Yucatan Shelf. The segregation distribution of appendicularians in the study area appear to be strongly influenced by up welling and associated currents, and turbidity generated by continental water discharges. It could be assumed that food webs are an important associated factor. We hypothesize that a broad diet and higher filtration efficiency for larger particles (microfitoplankton) allows Oikopleura species to exploit the production in up welling areas, whereas Fritillaria species can not. It may explain its spatial segregation of these genera. 2010 artículo científico 0717-3326 https://www.redalyc.org/articulo.oa?id=47919217002 http://www.redalyc.org/revista.oa?id=479 Revista de Biología Marina y Oceanografía application/pdf Universidad de Valparaíso Revista de Biología Marina y Oceanografía (Chile) Num.3 Vol.45 |
| format | Artículo científico |
| id | redalyc_47919217002 |
| institution | Redalyc |
| language | |
| publishDate | 2010 |
| publisher | Universidad de Valparaíso |
| spellingShingle | Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation César Flores-Coto Ciencias de la Tierra turbidity Appendicularians spatial segregation mesoscale distribution Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation César Flores-Coto Laura Sanvicente-Añorve Felipe Vázquez-Gutiérrez Marina Sánchez-Ramírez Ciencias de la Tierra turbidity Appendicularians spatial segregation mesoscale distribution The mesoscale spatial distribution of Oikopleura and Fritillaria in the southern Gulf of Mexico was analyzed to know the existence of segregation between them. Samples were taken on 97 stations in the 50 m upper layer. Temperature, salinity and turbidity were measured. The spatial segregation index 'D' was applied to Oikopleura and Fritillaria densities and its significance was tested with Monte Carlo method. Regression Tree (RT) analyses were performed to identify the main environmental factors affecting the distribution of genera. The D index value was 0.67, considered as a high value. RT analyses showed the water turbidity was the main factor affecting the spatial distribution of both genera. Fritillaria was found in turbid waters off the main fluvio-lagoon systems and Oikopleura was most abundant in the up welling waters over Yucatan Shelf. The segregation distribution of appendicularians in the study area appear to be strongly influenced by up welling and associated currents, and turbidity generated by continental water discharges. It could be assumed that food webs are an important associated factor. We hypothesize that a broad diet and higher filtration efficiency for larger particles (microfitoplankton) allows Oikopleura species to exploit the production in up welling areas, whereas Fritillaria species can not. It may explain its spatial segregation of these genera. 2010 artículo científico 0717-3326 https://www.redalyc.org/articulo.oa?id=47919217002 http://www.redalyc.org/revista.oa?id=479 Revista de Biología Marina y Oceanografía application/pdf Universidad de Valparaíso Revista de Biología Marina y Oceanografía (Chile) Num.3 Vol.45 |
| title | Mesoscale distribution of Oikopleura and Fritillaria (Appendicularia) in the Southern Gulf of Mexico: spatial segregation |
| topic | Ciencias de la Tierra turbidity Appendicularians spatial segregation mesoscale distribution |
| url | https://www.redalyc.org/articulo.oa?id=47919217002 |