DistribuciĆ³n vertical de la macroinfauna asociada a bivalvos en una planicie intermareal sedimentaria del sur de Chile
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2012-12
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es
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Universidad de ValparaĆso. Facultad de Ciencias del Mar
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Licencia CC
Resumen
La estructura comunitaria de la macroinfauna que habita en planicies intermareales, asĆ como su distribuciĆ³n en la columna de sedimento, puede ser influida por una combinaciĆ³n de factores fĆsicos y biolĆ³gicos. El objetivo de este estudio fue determinar y comparar la distribuciĆ³n vertical y estructura comunitaria de la macroinfauna asociada a sedimentos con navajuelas (Tagelus dombeii) en la planicie intermareal de Pelluco, sur de Chile, durante febrero y septiembre de 2004. Se recolectaron muestras de sedimento y macroinfauna en sitios con y sin bivalvos, con un cilindro plĆ”stico dividido en 5 partes iguales. Durante ambos meses de muestreo, el nĆŗmero de especies, abundancia y biomasa total de la macroinfauna alcanzĆ³, en casi todas las lĆ”minas sedimentarias, valores mĆ”s altos en el sitio con T. dombeii. En ambos meses de muestreo, la composiciĆ³n faunĆstica fue significativamente distinta entre sitios con y sin T. dombeii. AdemĆ”s, la similitud en la composiciĆ³n faunĆstica entre lĆ”minas sedimentarias fue mayor en el sitio con T. dombeii durante ambos meses de muestreo. Estos resultados sugieren que el proceso de bioperturbaciĆ³n de T. dombeii afecta la distribuciĆ³n vertical de la fauna asociada y que este efecto no serĆa dependiente de la Ć©poca del aƱo.
The community structure of the macroinfauna inhabiting intertidal flats, as well as its distribution inside the sediment column, can be influenced by a combination of physical and biological factors. The objective of this study was to evaluate the vertical distribution and the community structure of the macroinfauna associated to sediments containing razor clams (Tagelus dombeii), during February and September, 2004 on the intertidal flat of Pelluco, Southern Chile. Sediment and macroinfauna samples were collected from sites with and without bivalves, using plastic cylinders divided into 5 equal parts. During both sampling months, the total number of species and the total abundance and biomass of the macroinfauna reached, in almost all sedimentary layers, higher values in the site with T. dombeii. In both sampling months, the faunistic composition was significantly different between sites with and without T. dombeii. In addition, the similarity in the faunistic composition between sedimentary layers was higher in the site with T. dombeii. The results of this study suggest that the bioturbation process of T. dombeii affects the vertical distribution of the associated macroinfauna and that this effect would not be dependent on the time year.
The community structure of the macroinfauna inhabiting intertidal flats, as well as its distribution inside the sediment column, can be influenced by a combination of physical and biological factors. The objective of this study was to evaluate the vertical distribution and the community structure of the macroinfauna associated to sediments containing razor clams (Tagelus dombeii), during February and September, 2004 on the intertidal flat of Pelluco, Southern Chile. Sediment and macroinfauna samples were collected from sites with and without bivalves, using plastic cylinders divided into 5 equal parts. During both sampling months, the total number of species and the total abundance and biomass of the macroinfauna reached, in almost all sedimentary layers, higher values in the site with T. dombeii. In both sampling months, the faunistic composition was significantly different between sites with and without T. dombeii. In addition, the similarity in the faunistic composition between sedimentary layers was higher in the site with T. dombeii. The results of this study suggest that the bioturbation process of T. dombeii affects the vertical distribution of the associated macroinfauna and that this effect would not be dependent on the time year.
Notas
IndexaciĆ³n: Web of Science; Scielo
Palabras clave
Tagelus dombeii, Estructura comunitaria, BioperturbaciĆ³n
CitaciĆ³n
Rev. biol. mar. oceanogr. vol.47 no.3 ValparaĆso Dec. 2012