Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico

Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico

A comparative study of the density and biomass of the meiofauna distributed on the upper continental slope of the western and southern Gulf of Mexico was conducted on board the R/V Justo Sierra. A total of 48 samples were obtained with the aid of a Gomex box corer, at depths ranging from 196 to 540...

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Autores principales: Escobar, E, López, M, Soto, LA, Signoret, M
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 1997
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/823
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record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Escobar, E
López, M
Soto, LA
Signoret, M
spellingShingle Escobar, E
López, M
Soto, LA
Signoret, M
Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
author_facet Escobar, E
López, M
Soto, LA
Signoret, M
author_sort Escobar, E
title Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
title_short Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
title_full Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
title_fullStr Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
title_full_unstemmed Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico
title_sort density and biomass of the meiofauna of the upper continental slope in two regions of the gulf of mexico
description A comparative study of the density and biomass of the meiofauna distributed on the upper continental slope of the western and southern Gulf of Mexico was conducted on board the R/V Justo Sierra. A total of 48 samples were obtained with the aid of a Gomex box corer, at depths ranging from 196 to 540 m off the coast of Tamaulipas and Yucatán. Both regions have contrasting hydrographic and sedimentary conditions; the former is of terrigenous nature, while the latter is carbonaceous. The highest density and biomass values (mean = 1,829,216 ± 489,005 ind/m2 and 0.304 f 0.082 gC/m2, respectively) were recorded off Tamaulipas. These parameters were tive to six times lower in order of magnitude in the Yucatán slope. Meiofauna biomass values were significantly correlated with density (r2 = 0.99). Significant differences in density [Fc(1,46) = 38.51, P < 0.005] and biomass [Fc( 1,46) = 37.72, P < 0.005] were recognized between both areas studied. No clear spatial or bathymetric patterns were observed in the meiofaunal components identified in Tamaulipas. This pattern was attributed to the prevailing variable hydrographic conditions and the different organic carbon sources present in the westem region of the Gulf of Mexico. In contrast, the depth and particulate organic carbon of the Yucatán slope exert a significant influence on meiofaunal density and biomass. In this region, predation by larger size classes seems to control the density. The density and biomass values recorded in both regions of the gulf studied fall within the range of previous meiofauna reports from the northern Gulf of Mexico and similar slope habitats of the world oceans.
publisher Iniversidad Autónoma de Baja California
publishDate 1997
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/823
_version_ 1715724015948005376
spelling oai:cienciasmarinas.com.mx:article-8232019-05-22T19:12:18Z Density and biomass of the meiofauna of the upper continental slope in two regions of the Gulf of Mexico Densidad y biomasa de la meiofauna del talud continental superior en dos regiones del golfo de México Escobar, E López, M Soto, LA Signoret, M meiofauna density biomass continental slope Gulf of Mexico meiofauna densidad biomasa talud continental Golfo de México A comparative study of the density and biomass of the meiofauna distributed on the upper continental slope of the western and southern Gulf of Mexico was conducted on board the R/V Justo Sierra. A total of 48 samples were obtained with the aid of a Gomex box corer, at depths ranging from 196 to 540 m off the coast of Tamaulipas and Yucatán. Both regions have contrasting hydrographic and sedimentary conditions; the former is of terrigenous nature, while the latter is carbonaceous. The highest density and biomass values (mean = 1,829,216 ± 489,005 ind/m2 and 0.304 f 0.082 gC/m2, respectively) were recorded off Tamaulipas. These parameters were tive to six times lower in order of magnitude in the Yucatán slope. Meiofauna biomass values were significantly correlated with density (r2 = 0.99). Significant differences in density [Fc(1,46) = 38.51, P < 0.005] and biomass [Fc( 1,46) = 37.72, P < 0.005] were recognized between both areas studied. No clear spatial or bathymetric patterns were observed in the meiofaunal components identified in Tamaulipas. This pattern was attributed to the prevailing variable hydrographic conditions and the different organic carbon sources present in the westem region of the Gulf of Mexico. In contrast, the depth and particulate organic carbon of the Yucatán slope exert a significant influence on meiofaunal density and biomass. In this region, predation by larger size classes seems to control the density. The density and biomass values recorded in both regions of the gulf studied fall within the range of previous meiofauna reports from the northern Gulf of Mexico and similar slope habitats of the world oceans. Un estudio comparativo de la densidad y biomasa de la meiofauna distribuida en el talud continental superior de las zonas oeste y sur del Golfo de México se realizó a bordo del B/O Justo Sierra. Se obtuvo un total de 48 muestras con un nucleador de caja (box corer) tipo Gomex, a profundidades de 196 a 540 m frente a la costa de Tamaulipas y Yucatán. Ambas regiones tienen condiciones hidrográficas y sedimentarias diferentes, siendo la primera de naturaleza terrígena y la segunda, carbonatada. Los valores más elevados, tanto de densidad como de biomasa (promedio = 1,829,216 f 489,005 ind/m2 y 0.304 f 0.082 gC/m2, respectivamente), se reconocieron frente a Tamaulipas. Éstos fueron cinco a seis veces menores en orden de magnitud en el talud de Yucatán. Los valores de biomasa de la meiofauna estuvieron correlacionados con la densidad (r2= 0.99). Se reconocieron diferencias significativas en densidad [Fc( 1,46) = 38.51, P < 0.005] y biomasa [Fc( 1,46) = 37.72, P < 0.005] entre ambas áreas de estudio. No se reconocieron patrones espaciales ni batimétricos en los componentes identificados de la meiofauna de Tamaulipas. Esto se atribuyó a la variabilidad de las condiciones hidrográficas y diferentes fuentes de carbono presentes en la región occidental del Golfo de México. En contraste, la profundidad y naturaleza del carbono orgánico particulado a lo largo del talud de Yucatán ejercen una influencia significativa sobre la densidad y biomasa de la meiofauna. En esta región, la depredación por clases de talla mayores parece controlar la densidad. Los valores de biomasa y densidad reconocidos en ambas áreas estudiadas en el golfo caen dentro del intervalo de registros previos de meiofauna en el norte del Golfo de México y hábitats similares de talud continental del océano mundial. Iniversidad Autónoma de Baja California 1997-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/823 10.7773/cm.v23i4.823 Ciencias Marinas; Vol. 23 No. 4 (1997); 463-489 Ciencias Marinas; Vol. 23 Núm. 4 (1997); 463-489 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/823/748

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