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No. de sistema: 000024465

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 020220m20019999nyu^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| nyu
084 _ _ a| AR/333.75137
b| O2
100 1 _ a| Ochoa Gaona, Susana
c| Dra.
245 1 0 a| Traditional land-use systems and patterns of forest fragmentation in the highlands of Chiapas, Mexico
520 1 _ a| The influence of slash-and-burn agriculture and tree extraction on the spatial and temporal pattern of forest fragmentation in two municipalities in the highlands of Chiapas, Mexico was analyzed. The data series were derived from two subsets of satellite images taken in 1974 and 1996. The analysis was based on area, edge, shape, core area, and neighbor indices. During the 22 years, the dense forest decreased by 8.9%/yr in Huista´ n and by 8.6%/yr in Chanal, while open/disturbed forest, secondary vegetation, and developed area increased in both municipalities. The total number of fragments increased by 1.4%/yr and 2.3%/yr in Huista´ n and Chanal, respectively. Dense forest showed the highest increase in the number of fragments (6%/yr in Huista´ n and 12%/yr in Chanal), while edge length, core area, and number of dense forest core areas decreased. The larger fragments of dense forest present in 1974 were divided into smaller fragments in 1996; at the same time, they experienced a process of degradation toward open/disturbed forest and secondary vegetation. Two different fragmentation patterns could be distinguished based on agricultural or forestry activities. Forest fragmentation did not occur as a continuous process; the pattern and degree of fragmentation were functions of land tenure, environmental conditions, and productive activities. The prevalence of rather poor soil conditions, small-holdings, growing human population densities, increasing poverty, and the absence of alternative economic options will maintain a high rate of deforestation and forest fragmentation in the studied region.
650 _ 4 a| Ecología del paisaje
650 _ 4 a| Agricultura de roza, tumba y quema
650 _ 4 a| Imágenes por satélite
650 _ 4 a| Deforestación
651 _ 4 a| Huixtán (Chiapas, México)
651 _ 4 a| Chanal (Chiapas, México)
773 0 _
t| Environmental Management
g| Vol. 27, no. 4 (2001), p. 571-586
x| 0364-152X
904 _ _ a| Mayo 2009
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Desastres
905 _ _ a| CRIIS
905 _ _ a| Biblioelectrónica
LNG eng
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Traditional land-use systems and patterns of forest fragmentation in the highlands of Chiapas, Mexico
Ochoa Gaona, Susana (autor)
Clasificación: AR/333.75137/O2
Contenido en: Environmental Management. Vol. 27, no. 4 (2001), p. 571-586. ISSN: 0364-152X
Bibliotecas:
Campeche , Chetumal , San Cristóbal , Tapachula , Villahermosa
No. de sistema: 24465
Tipo: Artículo


Inglés

"The influence of slash-and-burn agriculture and tree extraction on the spatial and temporal pattern of forest fragmentation in two municipalities in the highlands of Chiapas, Mexico was analyzed. The data series were derived from two subsets of satellite images taken in 1974 and 1996. The analysis was based on area, edge, shape, core area, and neighbor indices. During the 22 years, the dense forest decreased by 8.9%/yr in Huista´ n and by 8.6%/yr in Chanal, while open/disturbed forest, secondary vegetation, and developed area increased in both municipalities. The total number of fragments increased by 1.4%/yr and 2.3%/yr in Huista´ n and Chanal, respectively. Dense forest showed the highest increase in the number of fragments (6%/yr in Huista´ n and 12%/yr in Chanal), while edge length, core area, and number of dense forest core areas decreased. The larger fragments of dense forest present in 1974 were divided into smaller fragments in 1996; at the same time, they experienced a process of degradation toward open/disturbed forest and secondary vegetation. Two different fragmentation patterns could be distinguished based on agricultural or forestry activities. Forest fragmentation did not occur as a continuous process; the pattern and degree of fragmentation were functions of land tenure, environmental conditions, and productive activities. The prevalence of rather poor soil conditions, small-holdings, growing human population densities, increasing poverty, and the absence of alternative economic options will maintain a high rate of deforestation and forest fragmentation in the studied region."

SIBE Campeche
Codigo de barra
Estado
Colección
ECO040001314
(Disponible)
Artículos de investigación ECOSUR
SIBE Chetumal
Codigo de barra
Estado
Colección
ECO030000419
(Disponible)
Artículos de investigación ECOSUR
SIBE San Cristóbal
Codigo de barra
Estado
Colección
SER001297
(Disponible)
Artículos de investigación ECOSUR
SER001296
(Disponible)
Artículos de investigación ECOSUR
SIBE Tapachula
Codigo de barra
Estado
Colección
ECO020011368
(Disponible)
Artículos de investigación ECOSUR
SIBE Villahermosa
Codigo de barra
Estado
Colección
ECO050002507
(Disponible)
Artículos de investigación ECOSUR