Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific

Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific

 Changes in the macrobenthic community of a sandy-beach were studied during the "El Niño" 1997-98 event at the Malaga Bay, in the central Colombian Pacific. Species composition was recorded monthly from October 1997 to May 1998 at four tidal levels, and species diversity (Shannon-...

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Hovedforfatter: Riascos, JM
Format: Online
Sprog:eng
Udgivet: Iniversidad Autónoma de Baja California 2002
Online adgang:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/209
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spelling oai:cienciasmarinas.com.mx:article-2092019-05-02T19:02:57Z Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific Cambios en el macrobentos de playa arenosa durante “El Niño” 1997-98 en la Bahía de Málaga, Pacífico colombiano Riascos, JM Communities benthos diversity distribution environmental changes Colombia Comunidades bentos diversidad distribución cambios ambientales Colombia  Changes in the macrobenthic community of a sandy-beach were studied during the "El Niño" 1997-98 event at the Malaga Bay, in the central Colombian Pacific. Species composition was recorded monthly from October 1997 to May 1998 at four tidal levels, and species diversity (Shannon-Wienner, H') and richness were calculated. In order to analyze community structure changes, multivariate ordinations were performed (non-metric multidimensional scaling) and species responsible for the observed temporal changes were discriminated using a dissimilarity index. Differences in species diversity and richness were related to a seriation pattern in vertical species distribution . A common pattern of structure change was found at four tidal levels on the beach. Population reduction or increase of some species and vertical modifications of the spatial distribution patterns were the main source of temporal community change. En este artículo se analizan los cambios estructurales del macrobentos de playa arenosa en la Bahía de Málaga, en la region central del Pacífico colombiano, durante un período caracterizado por la influencia del evento climático conocido como "El Niño" (EN). Se realizaron muestreos mensuales entre octubre de 1997 y mayo de 1998, registrando la abundancia de especies en 4 niveles mareales distintos en transectos perpendiculares a la línea de costa. A partir de esta información se estimó la diversidad (Shannon-Wienner, H´  ) la riqueza de especies, y se realizó un análisis de ordenación por escalamiento multidimensional no métrico (MDS), a fín de establecer los cambios estructurales. Las especies responsables de los cambios temporales en la comunidad se discriminaron mediante el uso de un índice de disimilaridad. Durante el estudio se observó una distribución vertical que corresponde a un patrón dinámico de seriación, más que a una zonación propiamente dicha. Las variaciones temporales de este patrón ocasionaron las principales diferencias temporales en diversidad y riqueza de especies en los niveles mareales. En cuanto a la estructura de la comunidad, se observó un patrón común de variación temporal en los 4 niveles mareales, relacionado con desplazamientos verticales o fluctuaciones de densidad de algunas especies. Iniversidad Autónoma de Baja California 2002-03-06 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/209 10.7773/cm.v28i1.209 Ciencias Marinas; Vol. 28 No. 1 (2002); 13-25 Ciencias Marinas; Vol. 28 Núm. 1 (2002); 13-25 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/209/176
institution Ciencias Marinas
collection OJS
language eng
format Online
author Riascos, JM
spellingShingle Riascos, JM
Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
author_facet Riascos, JM
author_sort Riascos, JM
title Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
title_short Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
title_full Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
title_fullStr Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
title_full_unstemmed Changes in the macrobenthos of a sandy beach during "El Niño" 1997-98 in the Malaga Bay, Colombian Pacific
title_sort changes in the macrobenthos of a sandy beach during "el niño" 1997-98 in the malaga bay, colombian pacific
description  Changes in the macrobenthic community of a sandy-beach were studied during the "El Niño" 1997-98 event at the Malaga Bay, in the central Colombian Pacific. Species composition was recorded monthly from October 1997 to May 1998 at four tidal levels, and species diversity (Shannon-Wienner, H') and richness were calculated. In order to analyze community structure changes, multivariate ordinations were performed (non-metric multidimensional scaling) and species responsible for the observed temporal changes were discriminated using a dissimilarity index. Differences in species diversity and richness were related to a seriation pattern in vertical species distribution . A common pattern of structure change was found at four tidal levels on the beach. Population reduction or increase of some species and vertical modifications of the spatial distribution patterns were the main source of temporal community change.
publisher Iniversidad Autónoma de Baja California
publishDate 2002
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/209
_version_ 1715723942488965120

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