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Título:
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First records of Kinorhyncha from the Gulf of California:horizontal and vertical distribution of four genera in shallow basins with CO2 venting activity
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Autores:
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Álvarez Castillo, Lucía ;
Hermoso Salazar, Margarita ;
Estradas-Romero, Alejandro ;
Prol-Ledesma, Rosa María ;
Pardos Martínez, Fernando
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Tipo de documento:
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texto impreso
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Editorial:
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Station Biologique de Roscoff, 2015
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/restrictedAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias Biomédicas: Biología: Invertebrados
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Tipo = Artículo
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Resumen:
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The Wagner and Consag Basins, in the northern end of the Gulf of California are characterized by active CO2 gas vents. This venting activity causes a decrease in the pore water pH compared to other marine environments and the acidification of the bottom water is expected to affect the organisms that inhabit the sediments. In this study, we present the first records of four genera and ten “working species” of the phylum Kinorhyncha in Mexico. We also analyzed their horizontal and vertical distribution. Samples were collected at 40 soft bottom sites on board of the R/V “El Puma” (WAGNER-02 Expedition) during July-August 2010 with a Smith McIntyre grab and a syringe corer. At each station physicochemical variables were measured including pore water pH. In this study, Kinorhyncha represented 2.64% of the total meiofauna and it ranked fourth in dominance after Nematoda, Copepoda, and Polychaeta. Kinorhynchs densities ranged from zero to 24.05 ind.10 cm-2. We encountered a total of two families, four genera and ten “working species” of kinorhynchs. The family Pycnophyidae was represented by two genera Pycnophyes (two “working species”) and Kinorhynchus (five ”working species”) and the family Echinoderidae, two “working species” of the genus Echinoderes and one “working specie” of Fissuroderes were present. Kinorhynchs were mainly concentrated in the upper layers, with about 84% of the individuals present in the first four centimeters. This is the first ecological study of the phylum Kinorhyncha in Mexico and in a CO2 venting - low pH environment, registering also for the first time some data on the pH tolerance of these four kinorhynchs genera.
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En línea:
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https://eprints.ucm.es/42056/1/%C3%81lvarez-Castillo%2C%20L.First%20records.pdf
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