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 OJE  Vol.4 No.2 , February 2014
Species richness and community structure of class Polyplacophora at the intertidal rocky shore on the marine priority region no. 33, Mexico
Abstract: Marine Priority Region No. 33 (MPR 33) lies in the State of Guerrero, where the National Commission for Knowledge and Use of Biodiversity has declared a lack of information on marine species, Class POLYPLACOPHORA among others. This program was carried out on the rocky intertidal zone of MPR 33 with the objectives to: 1) determine species richness, 2) community composition based on families represented, 3) estimate the density, 4) index of diversity, 5) analyze body proportions and 6) geographic distribution of species. Three surveys on five sites were conducted during 2009 and 2012, using one mt2 quadrant for systematic sampling procedure; collecting all POLYPLACOPHORA specimens found within the quadrants, then proceeding with their preservation. 441 organisms were analyzed where 17 species were identified, on nine genera within six families. Fifteen new species were recorded for the MPR 33. Family ISCHNOCHITONIDAE Dall, 1889 was the best represented in species richness and CHITONIDAE Rafinesque, 1815 in abundance. Density of 8.82 organisms/m2, the H′ index was 2.38 bits/individuals and J′ = 0.57. The species Chiton (Chiton) articulatus Sowerby, 1832 showed the highest density, greater size and was found in all five collection sites. Three species, (Chiton (C.) articulatus, Ischnochiton (Ischnochiton) muscarius (Reeve, 1847) and Chiton (Chiton) alboli-neatus Broderip & Sowerby, 1829), were considered wide. Intertidal species richness was associated with habitat stability and wave intensity; the more unstable sites had greater richness while most stable sites lower. Species inventory and understanding the communities’ interactions of the marine fauna of the State of Guerrero are important; therefore these efforts must be continued.
Cite this paper: Galeana-Rebolledo, L. , Flores-Garza, R. , Reyes-Gómez, A. , García-Ibáñez, S. , Flores-Rodríguez, P. , Torreblanca-Ramírez, C. and Valdés-González, A. (2014) Species richness and community structure of class Polyplacophora at the intertidal rocky shore on the marine priority region no. 33, Mexico. Open Journal of Ecology, 4, 43-52. doi: 10.4236/oje.2014.42006.
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