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No. de sistema: 000020012

LDR _ _ 00000nam^^22^^^^^za^4500
008 _ _ 991228s1998^^^^mx^b^^^f^m^^^z000^0^spa^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| mx
084 _ _ a| TE/583.976
b| A7
100 1 _ a| Álvarez Moctezuma, José Guadalupe
c| Dr.
245 1 0 a| Hábitat y distribución de cinco especies de Quercus (Fagaceae) en la Meseta Central de Chiapas, México
c| José Guadalupe Álvarez Moctezuma
260 _ _ a| San Cristóbal de Las Casas, Chiapas, México
b| El Colegio de la Frontera Sur
c| 1998
300 _ _ a| 22 hojas
b| mapas
c| 28 centímetros
502 _ _ a| Tesis (Maestría en Ciencias en Recursos Naturales y Desarrollo Rural)--El Colegio de la Frontera Sur, 1998
504 _ _ a| Bibliografía (hoja 16-22)
520 1 _ a| The aims of this work were to describe the habitat of species of subgenus Lepidobalams (genus Quercus) and to identify the main environmental variables that are related to their distribution in the Meseta Central of Chiapas, Southem Mexico. In 258 plots a dominance index was used, combining tree density and crown cover, for Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. sebifera and Q. segoviensis. The following environmental variables were measured: altitude, winter precipitation, exposure, slope, intensity of fuel-wood harvesting and grazing. Detrended Canonical Correspondence Analysis was used for the statistical evaluation of data. Negative relationships between the dominance index of Q. peduncularis and Q. segoviensis and altitude and winter precipitation were found. The dominance index of Q. rugosa and Q. segoviensis was correlated with exposure and intensity of fuelwood harvesting. The altitude and to a lesser extent winter precipitation determined the distribution of the evaluated species. The main habitat characteristics of the species are described. The results suggest that Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. segoviensis and Q. sebifera can be ecologically differentiated.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Quercus peduncularis
650 _ 4 a| Quercus polymorpha
650 _ 4 a| Quercus rugosa
650 _ 4 a| Quercus sebifera
650 _ 4 a| Quercus segoviensis
650 _ 4 a| Hábitat (Ecología)
650 _ 4 a| Variables ambientales
651 _ 4 a| Meseta Central de Chiapas (México)
700 1 _ a| Ochoa Gaona, Susana
c| Dra.
e| tutora
700 1 _ a| De Jong, Bernardus Hendricus Jozeph
e| asesor
700 1 _ a| Soto Pinto, Lorena
d| 1958-
e| asesor
901 _ _ a| Maestría
905 _ _ a| Ecosur
905 _ _ a| Frosur
905 _ _ a| Biblioelectrónica
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Hábitat y distribución de cinco especies de Quercus (Fagaceae) en la Meseta Central de Chiapas, México / José Guadalupe Álvarez Moctezuma
Álvarez Moctezuma, José Guadalupe (autor)
Ochoa Gaona, Susana (tutora)
De Jong, Bernardus Hendricus Jozeph (asesor)
Soto Pinto, Lorena, 1958- (asesor)
Editor: San Cristóbal de Las Casas, Chiapas, México : El Colegio de la Frontera Sur, 1998
Descripción: 22 hojas : mapas ; 28 centímetros
Tesis: Tesis (Maestría en Ciencias en Recursos Naturales y Desarrollo Rural)--El Colegio de la Frontera Sur, 1998
Clasificación: TE/583.976/A7
Bibliotecas:
San Cristóbal
Nota: Bibliografía (hoja 16-22)
No. de sistema: 20012
Tipo: Tesis - Maestría


Inglés

"The aims of this work were to describe the habitat of species of subgenus Lepidobalams (genus Quercus) and to identify the main environmental variables that are related to their distribution in the Meseta Central of Chiapas, Southem Mexico. In 258 plots a dominance index was used, combining tree density and crown cover, for Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. sebifera and Q. segoviensis. The following environmental variables were measured: altitude, winter precipitation, exposure, slope, intensity of fuel-wood harvesting and grazing. Detrended Canonical Correspondence Analysis was used for the statistical evaluation of data. Negative relationships between the dominance index of Q. peduncularis and Q. segoviensis and altitude and winter precipitation were found. The dominance index of Q. rugosa and Q. segoviensis was correlated with exposure and intensity of fuelwood harvesting. The altitude and to a lesser extent winter precipitation determined the distribution of the evaluated species. The main habitat characteristics of the species are described. The results suggest that Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. segoviensis and Q. sebifera can be ecologically differentiated."

SIBE San Cristóbal
Codigo de barra
Estado
Colección
ECO010016016
(Disponible)
Publicaciones ECOSUR
ECO010016014
(Disponible)
Publicaciones ECOSUR

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