%0 Journal Article
%T Fauna de ara as del suelo de una comunidad 芍rida-tropical en Baja California Sur, M谷xico Ground surface spider fauna in an arid tropical community in Baja California Sur, Mexico
%A Mar赤a Luisa Jim谷nez
%A Jos谷 Gabriel Navarrete
%J Revista mexicana de biodiversidad
%D 2010
%I Instituto de Biolog赤a
%X Se describe la temporalidad y diversidad de ara as del suelo del matorral sarcocaule en la regi車n del Cabo en Baja California Sur. Durante 1991-1992 se realizaron colectas semanales por medio de trampas de ca赤da. Se capturaron 4 322 ejemplares de 53 especies. Las familias con mayor abundancia fueron Miturgidae (42.2%), Oonopidae (23.5%), Caponiidae (8.0%) y Gnaphosidae (7.9%). Las especies m芍s abundantes fueron Syspira tigrina Chamberlin (37.1%); Oonops nov. sp. (13.7%), Scaphiella hespera Chamberlin (7.8%) y Tarsonops sternalis Chamberlin (5.2%), que constituyeron el 63.7% del total de individuos. Gnaphosidae fue la m芍s rica en especies (11), seguida por Salticidae (7). La riqueza de especies fue constante durante todo el a o, con un ligero ascenso en el verano (29) y una ligera disminuci車n en el invierno (24). La diversidad por estaci車n del a o se mantuvo en un intervalo de H'= 3.3 -3.7. La abundancia relativa se increment車 en primavera y oto o. La mayor riqueza espec赤fica se encontr車 en oto o. La abundancia relativa y la diversidad de ara as se pueden considerar altas, a pesar del fuerte dominio de la familia Miturgidae. En la mayor赤a de las especies, la distribuci車n mostr車 una marcada estacionalidad. Seasonal distribution, specific richness, and diversity of xeric shrub ground spiders were studied at a site in the Cape Region. Weekly collections of spiders were made in 1991-1992 using pit-fall traps. We captured 4 322 specimens in 53 families. Families with the highest number of individuals were: Miturgidae (42%) Oonopidae (23.5%), Caponiidae (8.0%), and Gnaphosidae (7.9%). The most abundant species were Syspira tigrina Chamberlin (37.1%); Oonops nov. sp. (13.7%), Scaphiella hespera Chamberlin (7.8%), and Tarsonops sternalis Chamberlin (5.2%), representing 63.7% of the total specimens captured. Gnaphosidae was the richest in species (11) followed by Salticidae (7). Species richness was nearly constant during all the year, with a small increase in summer (29) and a small decline in winter (24); seasonal diversity was also constant (H'= 3.3-3.7). The highest relative abundance occurred in spring and autumn and the highest specific richness was in autumn. The diversity and relative abundance of spiders were high, in spite of the high abundance of Miturgidae. Distribution of the major species had a marked seasonality.
%K ara as ed芍ficas
%K Baja California Sur
%K matorral des谷rtico
%K ground spiders
%K Baja California Sur
%K desert shrub
%U http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1870-34532010000200015