Petit, Graciela Pulido, Wildermann, Natalie, and Barrios Garrido, Hector (2017) Comunidades de macroinvertebrados asociadas a piscinas de marea del litoral rocoso Punta Perret, estado Zulia, Venezuela // Macroinvertebrates community's structure associated to tide pools in the rocky shore of Punta Perret, Zulia State, Venezuela. Ciencia, 25 (1). pp. 15-28.

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Abstract

[Spanish] En el presente trabajo se describieron estas comunidades de macroinvertebrados asociados a las piscinas de mareas en el litoral rocoso de Punta Perret, en la Guajira venezolana. En los meses de marzo, septiembre y diciembre (2011), se realizaron tres muestreos, se dividió el litoral en tres zonas: supralitoral, mesolitoral e infralitoral. En cada zona de muestreo se seleccionaron aleatoriamente tres piscinas de marea en cada muestreo, se contaron todos los individuos asociados a estos ambientes para calcular los índices de diversidad, equidad, riqueza, dominancia y constancia, los factores abióticos salinidad,temperatura, altura con respecto a la plataforma basal y volumen en cada piscina fueron evaluados. Se contabilizaron un total de 4.421 individuos (en las 27 piscinas de marea estudiadas), la zona que presentó la mayor cantidad de especies constantes fue la supralitoral. La diversidad del litoral con respecto a todas las piscinas estudiadas fue de 1,001, el índice de equidad para todo el litoral fue de 0,2628, un valor de 1,526 riqueza total y la dominancia 0,71. Se encontró una correlación significativa entre el resultado del índice de riqueza de Margalef y la altura de la piscina en el litoral (r=0,0267), los gradientes de salinidad, altura y temperatura diferencian a las piscinas de las tres zonas y modelan la estructura fisicoquímica. Los patrones de distribución de los macroinvertebrados evidenciaron a los Littorinidos como dominantes,pero con una estructura comunitaria marcada en la zona supralitoral, Mytilus en las zonas mesolitoral e infralitoral y una alta diversidad de especies en la zona infralitoral muy fluctuante. La contaminación y extracción de especies clave pudiese estar jugando un papel importante en la modificación de los patrones de zonación.

[English] In the present work, these communities of macroinvertebrates associated with the tidal pools on the rocky coast of Punta Perret, in the Venezuelan Guajira, were described. In the months of March, September and December (2011), three samplings were carried out, the coast was divided into three zones: supralittoral, mesolitoral and infralittoral. In each sampling area, three tidal pools were randomly selected in each sampling, all the individuals associated with these environments were counted to calculate the indices of diversity, equity, richness, dominance and constancy, abiotic factors salinity, temperature, height with respect to to the basal platform and volume in each pool were evaluated. A total of 4,421 individuals were counted (in the 27 tidal pools studied), the area that presented the highest number of constant species was the supralittoral. The diversity of the littoral with respect to all the pools studied was 1.001, the equity index for the entire coastline was 0.2628, a value of 1.526 total wealth and dominance 0.71. A significant correlation was found between the result of the Margalef wealth index and the height of the pool in the littoral (r = 0.0267), the gradients of salinity, height and temperature differentiate the pools of the three zones and model the physicochemical structure. The distribution patterns of the macroinvertebrates showed the Littorinids as dominant, but with a marked community structure in the supralittoral zone, Mytilus in the mesolitoral and infralittoral zones and a high diversity of species in the very fluctuating infralittoral zone. Pollution and extraction of key species may be playing an important role in modifying zoning patterns.

Item ID:	52970
Item Type:	Article (Research - C1)
ISSN:	1315-2076
Keywords:	tide pools, community structure, macroinvertebrates, physicalchemical factors, key species
Additional Information:	Main text is in Spanish. This work is under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported license.
Date Deposited:	05 Apr 2018 04:29
FoR Codes:	31 BIOLOGICAL SCIENCES > 3103 Ecology > 310302 Community ecology (excl. invasive species ecology) @ 100%
SEO Codes:	96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments @ 30% 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 30% 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 40%
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