%0 Journal Article
%T Community structure and floristic composition of Quercus fusiformis and Carya illinoinensis forests of the Northeastern Coastal Plain, Coahuila, Mexico Estructura y composici車n flor赤stica de los bosques de Quercus fusiformis y Carya illinoinensis de la planicie costera del noreste, Coahuila, M谷xico
%A Juan Antonio Encina-Dom赤nguez
%A Efr谷n Mata Rocha
%A Jorge A. Meave
%A Alejandro Z芍rate-Lupercio
%J Revista mexicana de biodiversidad
%D 2011
%I Instituto de Biolog赤a
%X In order to describe community structure and richness in oak and walnut forests occurring along the San Rodrigo, San Diego, Escondido and Arroyo de las Vacas rivers on the Northeastern Coastal Plain (NE Coahuila, Mexico), we established 30 1 000-m2 circular plots, where we measured diameter at breast height (DBH) and tree heights. Tree regeneration and herb and shrub stratum were assessed in 5 2-m2 quadrats per site. A total of 48 species distributed in 29 families were recorded. Families with the largest richness were Poaceae, Asteraceae, and Malvaceae. For the oak forest, tree stratum density and basal area values were 386 stems/ha and 24.36 m2/ha, respectively, whereas for the walnut forest the corresponding values were 302 stems/ha and 21.26 m2/ha. The species with the highest relative importance values were Quercus fusiformis (59.48%) and Carya illinoinensis (57.58%). Total tree richness was 14 species, the most common ones being Celtis reticulata and Diospyros texana, followed closely by C. illinoinensis and Q. fusiformis. Anthropogenic impact appears to result in a poor regeneration reflected as a low sapling density, as well as in the reduction and fragmentation of these communities; in turn, this process has led to intrusions of species typical of the xerophytic Tamaulipan Thorn Scrub. Further studies are needed on the regeneration of the dominant species of these forests in order to describe their dynamics and to promote their preservation. Con la finalidad de conocer la estructura y la composici車n flor赤stica de los bosques de encino y nogal situados a lo largo de los r赤os San Rodrigo, San Diego, Escondido y Arroyo de las Vacas en la planicie costera nororiental (NE de Coahuila, M谷xico), se establecieron 30 parcelas circulares de 1 000 m2 en las que se midi車 el DAP y la altura de las especies arb車reas; adem芍s, se evalu車 la regeneraci車n de las especies arb車reas y el estrato herb芍ceo y arbustivo en 5 cuadros de 2 m2 por sitio. Se registraron 48 especies, integradas en 29 familias, siendo Poaceae, Asteraceae y Malvaceae las de mayor riqueza. La densidad y el 芍rea basal para el estrato arb車reo del bosque de encino fueron 386 ind/ha y 24.36 m2/ha, mientras que los valores respectivos para el bosque de nogal fueron 302 ind/ha y 21.26 m2/ha. Las especies con los mayores valores de importancia fueron Quercus fusiformis y Carya illinoinensis, con 59.48% y 57.58%, respectivamente. La riqueza arb車rea fue de 14 especies; las m芍s frecuentes fueron Celtis reticulata y Diospyros texana, seguidas de C. illinoinensis y Q. fusiformis. El impacto antropog谷nico h
%K 芍rea basal
%K bosque de encino
%K bosque de nogal
%K densidad de los 芍rboles
%K invasi車n de especies
%K regeneraci車n del bosque
%K basal area
%K forest regeneration
%K oak forest
%K species invasions
%K tree density
%K walnut forest
%U http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1870-34532011000200020