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Foraminíferos planctónicos vivos en el mar ecuatoriano: Taxonomía y distribución.

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Author
Luzuriaga de Cruz, María
Date
2014

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Abstract
La sensibilidad a las variaciones del ambiente marino por parte de las especies planctónicas como los foraminíferos planctónicos, convierten a estos organismos en herramientas vivas de detección de cambios del ecosistema marino en momento dado. El presente trabajo trata principalmente sobre la taxonomía y distribución de especies de foraminíferos planctónicos identificados en el mar ecuatoriano desde 1973 a 1998. Las muestras de zooplancton fueron colectadas a bordo de cruceros oceanográficos realizados, entre la costa hasta los 92°W, al oeste de las Islas Galápagos, y en la estación fija "La Libertad" (Península de Santa Elena). La población total de foraminíferos planctónicos comprendió 25 especies distribuidas en tres familias y siete géneros: Globigerina, Globigerinoides, Globoquadrina, Globorotalia, Orbulina, Hastigerina, Globigerinita. De éstas, Globigerinoides sacculifer y G. ruber predominaron en aguas con mayor influencia de aguas cálidas de la Cuenca de Panamá y Globigerina bulloides, en aguas frías de la Corriente de Humboldt. G. sacculifer y G. ruber predominaron durante el evento "El Niño" 97-98 a lo largo de toda la costa ecuatoriana.
The sensitivity to changes of the environment marine of planktonic species, such as planktonic foraminifera, makes them in detection tools of marine ecosystem changes, at any given time. The principal purpose of this paper is about of taxonomy and distribution of planktonic foraminifera species found in the ecuadorian sea, since 1973 until 1998. Zooplankton samples were collected aboard oceanographic cruises realized between the mainland coast until 92°W, to west of Galapagos Islands, and in the fixed station "La Libertad" (Santa Elena Península). The total population of planktonic foraminifera comprised 25 species distributed in three families and seven genera: Globigerina, Globigerinoides, Globoquadrina, Globorotalia, Orbulina, Hastigerina and Globigerinita. Of these, Globigerinoides sacculifer and G. ruber predominated in waters with major influence of warm waters of the Panama Bay and, Globigerina bulloides in cold waters of the Humboldt Current. G. sacculifer and G. ruber predominated during the event "El Niño" 97-98 all along the ecuadorian coast.
Journal
Acta Oceanográfica del Pacífico
Volume
19
Issue/Article Nr
1
Page Range
pp.399-439
URI
http://hdl.handle.net/1834/8330
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Acta Oceanográfica del Pacífico

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