Moluscos Asociados a Ensamblajes Macroalgales en El Litoral Rocoso De Córdoba, Caribe Colombiano

Abstract

The composition and abundance of the benthic community of mollusks associated to macroalgal assemblages was studied in two ecoregions of the coastal strip of the Córdoba Province, Colombian Caribbean. Between September 2006 and June 2007 four samplings were done in six stations; three in San Antero, two in Puerto Escondido, and one in Los Córdobas. A quadrant of 625 cm2 with five replicates was used in order to collect the material; it was arranged randomly in each sampling period. A total of 1012 specimens and 68 species of mollusks were identified (46 gastropods, 19 bivalves, two polyplacophorans, and one scaphopod). The most abundant species in the Morrosquillo ecoregion were Bittiolum varium (34.95%), Parvanachis obesa (13.69%), Isognomon alatus (12.43%), and Columbella mercatoria (7.93%), while in the Darien ecoregion they were Eulithidium tessellatum (38.29%), E. affine (19.04%), C. mercatoria (7%), I. alatus (5.91%), and Tegula viridula (5.69%). There were significant differences between the macroalgal cover (Fs = 71.2, p < 0.001) and mollusk abundance (Fs = 56.9, p < 0.001) to the sampling stations (α = 0.05). The Principal Component Analysis (PCA) showed that the abundances of P. obesa, B. varium, I. alatus, and C. mercatoria is regulated by differences in coverage of the family Gracilariaceae in Morrosquillo ecoregion, while the abundance of E. affine, E. tessellatum, and T. viridula is regulated by changes in coverage of Sargassum polyceratium and Bryothamnion triquetrum in Darien ecoregion.

Community structure and functional traits of mollusks associated with coastal reef macroalgae in Northeastern Brazil

“…The limited number of records of G. ovuliformis from along the Brazilian coast can be explained by the incipient nature of studies on micromollusks in their typical habitats there, such as marine phanerogams and sandy bottoms (Rios, 2009). On the other hand, B. varium is typically abundant and is adapted to the microhabitat offered by macroalgae and marine phanerograms, as recorded by Cunha, Güth, Bromberg, and Sumida (2013), Rodríguez and Campos (2013), Queiroz andLongo et al (2014). This demonstrates the importance of macroalgae as a microhabitat available for colonization by species with greater habitat plasticity and as having the ability to recruit in a variety of environments.…”

Abundancia y diversidad trófica de moluscos del mesolitoral rocoso en un gradiente de eutrofización de la costa suroriental de Cuba

“…En el mesolitoral rocoso del mar Caribe los moluscos constituyen dentro de los invertebrados uno de los grupos de mayor riqueza de especies en México (González-Solis y Torruco, 2015; De la Cruz-Francisco et al, 2017), Colombia (Rodríguez y Campos, 2013), Venezuela (Fernández y Jiménez, 2006;Fernández et al, 2014) y Cuba Jover et al, 2014). Las cadenas tróficas de los moluscos en este hábitat están dominadas por bivalvos filtradores y gasterópodos herbívoros y carnívoros (Fernández y Jiménez, 2006).…”

“…Las cadenas tróficas de los moluscos en este hábitat están dominadas por bivalvos filtradores y gasterópodos herbívoros y carnívoros (Fernández y Jiménez, 2006). Además, la mayor riqueza y abundancia de moluscos está asociada a los lechos de macroalgas intermareales (Rodríguez y Campos, 2013;Jover et al, 2014).…”

Estado actual de Melongena melongena (Mollusca: Gastropoda) en la bahía de Cispatá, Caribe Colombiano

“…Este caracol vive en las zonas poco profundas de hábitat marinos, estuarinos y costeros, asociado a los manglares, siendo un componente importante de la fauna en fondos blandos o fangosos. La especie tiende a concentrarse en áreas con altas densidades de su presa, que corresponden a bivalvos, otros caracoles, ascidias y carroña (1,2,3,4). Teniendo en cuenta este comportamiento, los pescadores a veces usan las raíces de manglar, cubiertas con bivalvos como carnada (5).…”