variación estructural de la comunidad perifítica colonizadora de sustratos artificiales en la zona de ritral del río medellín, colombia

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ID: 205064
2007
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Abstract
Se colocaron muestreadores de material acrílico con portaobjetos a nivel subsuperficial en dos estaciones de recolección en la parte alta del río Medellín. De enero a marzo de 1998 se tomaron muestras semanales y se encontraron diferencias temporales significativas en la diversidad y en la equidad (Friedman p<0.05). A nivel espacial hubo diferencias en la biomasa, la productividad, la diversidad y la equidad (Friedman p<0.05)). La biomasa total y la productividad aumentaron con el tiempo de colonización en la estación 1. La estación 2, que tiene un caudal cuatro veces mayor, tuvo menor diversidad y equidad media. Durante el proceso de colonización se encontraron 76 especies pertenecientes a 22 familias, siendo la división de las crisofitas, principalmente diatomeas, la más abundante (56 % del total), seguida por clorofíceas (29 %), cianofíceas (11 %) y criptofíceas (l 4 %).
Variation in the structure of the periphytic community that colonizes artificial substrata in the Medellín river (Colombia). Weekly samples were taken from microscope glass slides attached to acrylic substrata were placed at subsuperficial level in two sampling stations in the higher section of the Medellín river, Colombia, from January through March 1998. Diversity and evenness varied with time (Friedman p<0.05). There were spatial differences in biomass, productivity, diversity and evenness (Friedman p<0.05). Total biomass and productivity increased with the time of colonization at station 1. Station 2, with four times more water flow, had lower diversity and mean evenness values. During the colonization process the were 76 species (22 families). The Chrysophyta, mainly diatoms, were the most abundant (56 % of the total), followed by Clorophyta (29 %), Cyanophyta (11 %) and Cryptophyta (4 %). Rev. Biol. Trop. 55 (2): 585-593. Epub 2007 June, 29.
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Authors ;Yimmy Montoya M;John J Ramírez R
Journal science journal of university of zakho
Year 2007
DOI
DOI not found
URL
http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200019
Keywords
colonization biofilms

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