Distribución espacial de macroinvertebrados bentónicos en el intermareal rocoso de la Punta de San Lorenzo, Santa Elena, Ecuador
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2018
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Facultad de Ciencias Naturales, Universidad de Guayaquil
Resumen
Se analizó la comunidad de macroinvertebrados bentónicos móviles en la Punta de San Lorenzo, provincia de Santa Elena. Los muestreos realizados en los estratos intermareales (supralitoral, mesolitoral e infralitoral), durante Julio - Diciembre de 2017, registraron 7 648 individuos e identificaron tres phylas (Mollusca, Echinodermata y Arthropoda), con cinco clases, siendo Gastrópoda la más representativa con 22 especies, las más abundantes fueron : Siphonaria palmata con 9.2 individuos/m², Cerithium gallapaginis con 5.0 individuos/m², Anachis rugulosa - Echinolittorina aspera con 11.73 y 15.22 individuos/m², respectivamente y el equinodermo Echinometra vanbrunti con 21.13 individuos/m²; a nivel de estratos el mesolitoral representó la mayor abundancia y diversidad 43.0 % y 2.9 bits, mientras que la menor fue en el supralitoral con 26.0 % y 0.8 bits, a nivel de transectos no se evidenciaron diferencias entre zonas y la diversidad se consideró normal en un rango de 2.0 - 2.4 bits.
The community of mobile benthic macroinvertebrates at Punta de San Lorenzo, province of Santa Elena was analyzed. The samplings made in the intertidal strata (supralittoral, mesolitoral and infralittoral), during July - December 2017, registered 7 648 individuals and identified three phylas (Mollusca, Echinodermata and Arthropoda), with five classes, being Gastropoda the most representative with 22 species , being the most representative: Siphonaria palmata with 9.2 individuals/m², Cerithium gallapaginis with 5.0 individuals/m², Anachis rugulosa - Echinolittorina rugulosa with 11.73 and 15.22 individuals/m² and the echinoderm Echinometra vanbrunti with 21.13 individuals/m²; at the level of strata the mesolithral represented the highest abundance and diversity 43.0 % and 2.9 bits, while the lowest was in the supralittoral with 26.0 % and 0.8 bits, at the level of transects no differences were observed between zones and diversity was considered normal in a range of 2.0 - 2.4 bits.
The community of mobile benthic macroinvertebrates at Punta de San Lorenzo, province of Santa Elena was analyzed. The samplings made in the intertidal strata (supralittoral, mesolitoral and infralittoral), during July - December 2017, registered 7 648 individuals and identified three phylas (Mollusca, Echinodermata and Arthropoda), with five classes, being Gastropoda the most representative with 22 species , being the most representative: Siphonaria palmata with 9.2 individuals/m², Cerithium gallapaginis with 5.0 individuals/m², Anachis rugulosa - Echinolittorina rugulosa with 11.73 and 15.22 individuals/m² and the echinoderm Echinometra vanbrunti with 21.13 individuals/m²; at the level of strata the mesolithral represented the highest abundance and diversity 43.0 % and 2.9 bits, while the lowest was in the supralittoral with 26.0 % and 0.8 bits, at the level of transects no differences were observed between zones and diversity was considered normal in a range of 2.0 - 2.4 bits.
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ECHINOMETRA VANBRUNTI, ECHINOLITTORINA ASPERA, MACROINVERTEBRADOS BENTÓNICOS, ESTRATO INTERMAREAL