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  • 1
    ISSN: 0014-5793
    Keywords: Acetylcholinesterase ; Amino acid sequence ; Sequence homology ; Serine esterase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2021-07-30
    Description: En el presente estudio se describe la estructura de la comunidad fitoplanctónica y su distribución en el Estrecho de Gerlache (EG) durante el verano austral 2018-2019. Se realizaron arrastres verticales de 200 m a la superficie a través de una red Bongo equipada con flujómetro. Las muestras se fijaron en Lugol básico en una relación 100:1. Muestras adicionales para el análisis de nutrientes y clorofila-a se tomaron a través de una roseta oceanográfica. Mediante un análisis de funciones empíricas ortogonales estandarizadas el Estrecho de Gerlache fue regionalizado en cuatro regiones, usando los datos de riqueza y químicos. De las regiones identificadas se ubicaron dos en el norte, una en el centro y otra en el sur. En términos de riqueza se identificaron 40 taxones representados por 28 diatomeas, 11 dinoflagelados y un silicoflagelado. La mayor riqueza y abundancia se encontró en la región central siendo las diatomeas el grupo dominante en todas las estaciones. Las especies Corethron criophilum y Porosira glacialis representaron el mayor aporte a la comunidad. Los dinoflagelados formaron el segundo grupo más distintivo en el área de estudio, representado por las especies Protoperidinium pyrum y Prorocentrum minimun. Por otra parte, los silicoflagelados con la especie Dictyocha sp., fueron el grupo con menor representatividad en el área; sin embargo, su mayor abundancia se observó en la región norte. Con base en investigaciones realizadas por otros autores en años anteriores para el mismo periodo climático, se evidenciaron diferencias en la estructura de la comunidad, con dominancia de las diatomeas sobre los demás grupos identificados; dichos cambios pueden obedecer a las técnicas analíticas empleadas y a la variabilidad interanual.
    Description: This study describes the structure of the phytoplankton community and its distribution in the Gerlache Strait (EG) during the 2018-2019 austral summer. 200 m vertical trawls were made to the surface through a Bongo network equipped with a flowmeter. The samples were fixed in basic Lugol in a 100: 1 ratio. Additional samples for nutrient and chlorophyll-a analysis were collected through an oceanographic rosette. Through an analysis of standardized orthogonal empirical functions, the Gerlache Strait was regionalized in four regions, using the richness and chemical data. From the identified regions two were located in the north, one in the center, and one in the south. In terms of richness, 40 taxa represented by 28 diatoms, 11 dinoflagellates, and one silicoflagellate were identified. The greatest richness and abundance was found in the central region, with diatoms being the dominant group in all stations. The species Corethron criophilum and Porosira glacialis represented the greatest contribution to the community. Dinoflagellates formed the second most distinctive group in the study area, represented by Protoperidinium pyrum and Prorocentrum minimun. On the other hand, silicoflagellates with the Dictyocha sp., were the group with the lowest contributions in the area, however, its greatest abundance was observed in the northern region. Based on research conducted by other authors in previous years for the same climatic period, differences in the structure of the community are evident, with the dominance of diatoms over the other groups identified; these changes may be due to the analytical techniques used and the interannual variability.
    Description: Published
    Description: Not Known
    Keywords: Microfitoplancton ; Estructura ; ASFA_2015::M::Marine biology ; ASFA_2015::I::Ice
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.13-22
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