Equinoderms and crustaceans associated with the continental shelf (Colombian Caribbean)
Keywords:
fondos blandos, fondos duros, pastos maarinos, sustrato artificialAbstract
Echinoderms and crustaceans are involved in ecological processes which is why they have a value because they participate in maintaining ecosystem stability. In addition, they are indicators of natural and anthropic changes. Some ecological properties (composition, abundance and distribution) of echinoderms and crustaceos associated with different its rigs of the guajira media continental shelf in the Colombian Caribbean were determined, between September 2015 and May 2016 in five sectors. The samples were collected between 5 and 20 m deep on the continental shelf between the towns of Riohacha and Manaure. In addition, granulometry and calcimetry of sediments, salinity, conductivity, dissolved oxygen, pH, and nitrate-nitrite concentration were analyzed. For the groups studied, 11 taxa was determined: Phyla echinoderms (8 taxa) and subphylum crustaceans (3 taxas). The sector with the greatest abundance was Riohacha (582 ind/m2) and the least abundance Cangrejito (371 ind/m2), while Mayapo presented the greatest wealth of species. The area studied is characterized by the predominance of thick sands in all sectors, without significant differences between sampling sites (P > 0.05). The Echinoderms were more abundant on seagrass, while for the Crustaceans it was the artificial substrate. The guajira medium is considered uniform and homogeneous in the composition and abundance of the taxa studied.
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Copyright (c) 2020 Yisnelis Carrillo Beleño, Geomar Molina-Bolívar , Iris Jiménez-Pitre
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