Polyplacophora species richness,composition and distribution of its community associated with the intertidal rocky substrate in the marine priority region No.32 in Guerrero,Mexico  

作　　者：Rafael Flores-Garza Lizeth Galeana-Rebolledo Adriana Reyes-Gomez Sergio Garcia Ibanez Carmina Torreblanca-Ramirez Pedro Flores-Rodriguez y Arcadio Valdes Gonzalez 

机构地区：[1]Unidad Academica de Ecologia Marina,Laboratorio de Ecologia Costera y Sustentabilidad,Fraccionamiento Las Playas,Acapulco,Mexico [2]Doctorado en Ciencias Ambientales,Unidad de Ciencias de Desarrollo Regional,Universidad Autonoma de Guerrero.Calle Pino s/n Colonia El Roble Acapulco,Acapulco,Mexico

出　　处：《Open Journal of Ecology》2012年第4期192-201,共10页生态学期刊（英文）

基　　金：partly funded by CONACYT(Consejo Nacional de Ciencia y Tegnologia-National Council of Science and Technology);the state government of Guerrero through the research project No.91624 Ecological study of the Acapulco Bay FOMIX 2008-C01 and the research project No.91724 Diversity and abundance of marine cock-roach off the coast of Guerrero state Fomix 2008-C01.

摘　　要：The coast of Acapulco is located within the Marine Priority Region No. 32 (MPR No. 32) at the State of Guerrero, Mexico. The National Commission for the Knowledge and Use of Biodiversity has stated the lack of information on marine species that live there, among which are the Class Polyplacophora. This study aimed to: 1) determine species richness, 2) the community structure based on the representative families, 3) estimate the density, 4) locate species distribution, 5) determine their degree of occurrence (hierarchical position) within the community, 6) analyze the structure of length and width across the populations and 7) estimate the diversity index. The intertidal rocky substrate at seven beaches was sampled from 2009 to 2012. The sampling unit 1 m2, while the area sampled was 10 m2. It was analyzed 2.548 specimens of Polyplacophora, with 20 species identified. Tonicellidae and Ischnochitonidae were the Families better represented inspecies richness and Chitonidae in abundance. Lepidochitona flectens is a new record for the Mexican Tropical Pacific and Stenoplax mariposa for MPR. No. 32. The density was 25.48 specimens/m2. Eight dominant species were determined. Chiton albolineatus had the highest density. Ischnochiton muscarius, Chaetopleura unilineata, Chiton albolineatus and Chiton articulatus presented wide distribution. Chiton articulatus showed the largest size in length and width. H’ = 2.01 bits/ individual. Numerous dominant species were present with broad and regular distribution, probably due to Polyplacophora body design, which allows for better adaptation to the rigorous environmental conditions of the rocky intertidal.The coast of Acapulco is located within the Marine Priority Region No. 32 (MPR No. 32) at the State of Guerrero, Mexico. The National Commission for the Knowledge and Use of Biodiversity has stated the lack of information on marine species that live there, among which are the Class Polyplacophora. This study aimed to: 1) determine species richness, 2) the community structure based on the representative families, 3) estimate the density, 4) locate species distribution, 5) determine their degree of occurrence (hierarchical position) within the community, 6) analyze the structure of length and width across the populations and 7) estimate the diversity index. The intertidal rocky substrate at seven beaches was sampled from 2009 to 2012. The sampling unit 1 m2, while the area sampled was 10 m2. It was analyzed 2.548 specimens of Polyplacophora, with 20 species identified. Tonicellidae and Ischnochitonidae were the Families better represented inspecies richness and Chitonidae in abundance. Lepidochitona flectens is a new record for the Mexican Tropical Pacific and Stenoplax mariposa for MPR. No. 32. The density was 25.48 specimens/m2. Eight dominant species were determined. Chiton albolineatus had the highest density. Ischnochiton muscarius, Chaetopleura unilineata, Chiton albolineatus and Chiton articulatus presented wide distribution. Chiton articulatus showed the largest size in length and width. H’ = 2.01 bits/ individual. Numerous dominant species were present with broad and regular distribution, probably due to Polyplacophora body design, which allows for better adaptation to the rigorous environmental conditions of the rocky intertidal.

关 键 词：POLYPLACOPHORA Species Richness DISTRIBUTION SIZES 

分 类 号：R73[医药卫生—肿瘤]