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22 resultados encontrados para: TEMA: Hábitats forestales
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1.
- Artículo con arbitraje
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Resumen en: Español | Inglés |
Resumen en español

La región Puuc-Chenes está ubicada en el centro de la Península de Yucatán. Debido a que está rodeada por tres áreas naturales protegidas, constituye un importante eslabón para mantener la conectividad de la selva maya. Sin embargo, la expansión de la frontera agrícola en la región está favoreciendo la fragmentación del hábitat del jaguar (Panthera onca). En el presente estudio hemos analizado el grado de conectividad del paisaje para la región Puuc-Chenes con base en los requerimientos del hábitat de P. onca. Se usaron los programas ArcMap, FRAGSTATS e IDRISI para el análisis de la conectividad estructural y funcional del paisaje, el cual se basó en las diferencias conocidas de los requerimientos de hábitat para machos y para hembras. La selva fue la cobertura vegetal dominante al ocupar 49.8% del paisaje. El índice de contagio fue del 62.5% y el índice de contraste total de los bordes fue de 43.7%. De acuerdo con nuestros resultados, concluimos que la región Puuc-Chenes presenta una conectividad de paisaje estructural intermedia, ya que se identificó un corredor adecuado solo para machos y tres corredores para ambos sexos. Este estudio aporta elementos robustos basados en evidencias científicas que justifican la conservación de cuatro fragmentos de selva en la región Puuc-Chenes para preservar la conectividad del paisaje para Panthera onca en esta región.

Resumen en inglés

The Yucatan Peninsula is included as part of the initiative for the Mesoamerican Biological Corridor. In its central area, are located three Protected Natural Areas (PNA): the Biocultural Puuc Reserve (RBP, by its Spanish acronym), the Bala’an K’aax flora and fauna protected area (APB, by its Spanish acronym), Quintana Roo, and the Calakmul Biosphere Reserve (RBC, by its Spanish acronym), Campeche. The Puuc-Chenes region is located in the center of the Yucatan Peninsula - among these PNAs - which included important fragments of vegetation that in the past formed a continuum through the forests of the Yucatan Peninsula, constituting an important link to keep the connectivity of the Mayan forest. However, the expansion of the agricultural frontier is causing the fragmentation of the habitat. In the present study, the structural and functional connectivity of the Puuc-Chenes region is analyzed, based on habitat requirements of the Panthera onca (jaguar) by sex. Both, male and female, prefer tropical forest, however, P. onca males dare to transit in secondary vegetation and inclusively in agricultural areas. Males make inroads to villages more often than females, coming close to, and even crossing roads. P. onca males have a home range of 60 km². In the present study, the ArcMap, FRAGSTATS and IDRISI software were used to analyses the structural and functional connectivity of the landscape, based on the known differences of habitat requirements for P. onca males and females. A vegetation and land use map of the studied area was elaborated, based on Landsat 7 ETM+ images, with 30 m size pixels. The following cover classes were differentiated: tropical forest, secondary forest, agriculture, urban, and water polls, which were validated in the fields. The Puuc-Chenes has an extension of 972 578 ha.

Tropical forest was the dominant vegetation cover (49.8%) with the largest patch index covering 19.7% of the total landscape. The landscape had 2 509 fragments, from which 1 254 y 935 corresponded to secondary forest and anthropic patches, respectively. The contagion index was 62.5%, which indicates the existence of large and contiguous fragments. The total edge contrast index indicates the degree of landscape connectivity was 43.7%, meaning a medium contrast among the different class fragments. Likewise, forest had the highest area-weighted mean proximity index (PROX_AM de 8 701), confirming that the forest had bigger and less isolated fragments than the rest of the classes. The area of study, still have high value for the conservation of the habitat of the P onca. According to the results, we conclude that the Puuc-Chenes region has intermediate structural landscape connectivity, since a suitable corridor was identified for males and three corridors for both, males and females. Four priority fragments of forest were identified in the Puuc-Chenes landscape to be protected: the Puuc fragment with 1 916 km², the Chenes fragment with 1 380 km², the X’Panzil fragment with 679 km² and the Noh-Ha fragment with 88.5 km², which in total adds 4 063 km² of identified landscape for the conservation of the jaguar. It is important to stress that the Puuc fragment – which has the largest extension – presents a high degree of perforation, this means, it does not conform a continuum forest mass, since other class of patches are immerse in it, which affects its connectivity and quality as a jaguar habitat. It was found that the habitat extension for the P. onca in the Puuc-Chenes landscape added to the adjacent ANPs’ area conform 15 943 km², this ensure the persistence of the jaguar in the region.

However, this zone has strong anthropic pressures, due to the expansion of ethnic groups and the establishment of new agricultural colonies in the Hopelchén municipality, resulting in extensive agriculture and use of heavy machinery, application of inorganic fertilizer and pesticides, which have detrimental effects in soil restoration and therefore in forest restoration. These changes are producing a cascade of negative effects for the habitat and game of the jaguar. For the reason that the jaguar is a cryptic organism, it is suggested to carry out more research in order to validate the identified corridors in the present study, utilizing field methods that enable to determine the presence and absence of the P. onca. It is also important, to elaborate habitat quality maps using variables such as game density, ecological conditions of the fragments and minor water sources, among them provisioning of minor water sources. This study provides robust elements based on scientific evidences that justified the conservation of four forest fragments in the Puuc-Chenes region that will help to preserve the habitat of the Panthera onca in this region.


2.
Artículo
Telipogon helleri (Orchidaceae): population characteristics, new locality in Mexico and risk of extinction
García González, Alfredo ; Damon, Anne Asbhy (coaut.) ; Riverón Giró, Frander Brian (coaut.) ; Aguilar Romero, Osiris (coaut.) ; Solis Montero, Lislie (coaut.) ; Ávila Díaz, Irene (coaut.) ;
Contenido en: Botanical Sciences Vol. 94, no. 1 (2016), p. 97-106 ISSN: 2007-4298
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Resumen en: Español | Inglés |
Resumen en español

El primer registro de Telipogon helleri (Orchidaceae) en México fue en 2009. En el presente estudio se informa del hallazgo de una segunda población de este taxón, en una nueva localidad, y se reevalúa la población original cinco años después de su descubrimiento. Además, se caracteriza la nueva población y se evalúa la especie a través del Método de Evaluación del Riesgo de Extinción para plantas en México (MER-Plantas). Actualmente la población original presenta un incremento de 1.7 % (15.38 % inmaduros; 84.62 % adultos; n= 78 individuos), crece sobre seis forófitos (cuatro más que en 2009), 73.08 % de los individuos se encuentran sobre ramillas y su número hacia las diferentes orientaciones cardinales es similar. La nueva población de T. helleri se localizó en un fragmento de bosque de niebla, sobre un único forófito (Brunellia mexicana), cuenta con 36 individuos (38.89 % inmaduros; 61.11 % adultos), todos crecían sobre el tronco y 69.44 % lo hacía con orientación oeste. Se propone que la especie se considere en la categoría en peligro de extinción (P) en la Norma Oficial Mexicana. Es necesario realizar estudios demográficos y moleculares de T. helleri, para conocer los niveles de endogamia y variabilidad genética de los individuos y estimar la capacidad de adaptación y crecimiento poblacional de la especie. El aumento en el número de individuos que se ha logrado en los últimos cinco años podría invertirse rápidamente por las condiciones adversas de los hábitats y las localidades donde se encuentra.

Resumen en inglés

The first record of Telipogon helleri (Orchidaceae) in Mexico was in 2009. The relevance of this study is the finding and characterization of a second population of this taxon, in a new location, and the revaluation of the original population five years later of its discovery. In addition, we evaluated the new population by the Method of Evaluation of Risk of Extinction for plants in Mexico (MER-Plantas). We evaluated this species using the Risk Assessment Method of Extinction for plants in Mexico (MERPlantas). The original population increased 1.7 % (15.38 % immatures; 84.62 % adults; n= 78 individuals), and was distributed among six phorophytes (four more than in 2009), with 73.08% of the individuals growing on twigs and with a similar number of individuals facing the different cardinal points. The new population was found in a cloud forest fragment, growing on a single phorophyte (Brunellia mexicana), consisting of 36 individuals (38.89 % immatures; 61.11 % adults), all of which were growing on the trunk and 69.44 % facing west. We suggest that T. helleri should be placed in the category of endangered (P), in the Mexican Official Standard for threatened flora and fauna. It is necessary to carry out demographic and molecular studies to evaluate the levels of endogamy and the genetic viability of the individuals present and to estimate the capacity for adaptation and population growth. The increase in the number of individuals in the last five years could be rapidly reversed given the adverse conditions prevailing in the habitats and localities where the two populations are found.


3.
Tesis - Maestría
Impacto de la extracción forestal en los sitios dormideros y patrones de deposición de semillas de Ateles geoffroyi yucatanensis en Nuevo Becal, Calakmul, México / Guadalupe Velázquez Vázquez
Velázquez Vázquez, Guadalupe (autora) ; Reyna Hurtado, Rafael Ángel (director) ; Calmé, Sophie (asesora) ; Arroyo Rodríguez, Víctor (asesor) ;
San Francisco de Campeche, Campeche, México : El Colegio de la Frontera Sur , 2015
Disponible en línea
Clasificación: TE/599.82097264 / V4
Cerrar
SIBE Campeche
54965-60 (Disponible) , ECO040006057 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Chetumal
ECO030008302 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010017959 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020013305 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050005892 (Disponible)
Disponibles para prestamo: 1
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Índice

Capítulo I
1. Introducción
2. Objetivos
2.1 Objetivo general
2.1 Objetivos particulares
Capítulo II
Sleeping sites of spider monkeys (Ateles geoffroy) in logged and unlogged forest
Abstract
Introduction
Methods
Results
Discussion
References
Capítulo III
Impacto de la extracción forestal en los patrones de dispersión de semillas por el mono araña en Calakmul, México
Resumen
Introducción
Material y métodos
Resultados
Discusión
Capítulo IV
3. Discusión y conclusiones generales
Referencias bibliográficas


4.
- Artículo con arbitraje
Sleeping sites of spider monkeys (Ateles geoffroyi) in logged and unlogged tropical forests
Velázquez Vázquez, Guadalupe ; Reyna Hurtado, Rafael Ángel (coaut.) ; Arroyo Rodríguez, Víctor (coaut.) ; Calmé, Sophie (coaut.) ; Léger Dalcourt, Mathieu (coaut.) ; Navarrete Gutiérrez, Darío Alejandro (coaut.) ;
Contenido en: International Journal of Primatology Vol. 36, no. 6 (December 2015), p. 1154-1171 ISSN: 1573-8604
Resumen en: Inglés |
Resumen en inglés

Selective logging can have negative effects on biodiversity and on key ecological processes such as seed dispersal and forest regeneration. Yet, the effect that timber extraction has on animal behavior and habitat use is poorly known. We tested whether the density, distribution, and composition of sleeping sites used by spider monkeys (Ateles geoffroyi) differed between two logged and two unlogged forest sites in the Calakmul region, southeastern Mexico. We recorded a total of 74 sleeping sites (0.11 sleeping sites/ha). The density of sleeping sites did not differ between forest conditions. Most (97%) sleeping sites were located in medium-stature semievergreen forest, and only 3% in low-stature seasonally inundated forest. In three of four sites, the number of sleeping sites in core areas was significantly greater than expected by chance, showing an aggregated spatial distribution, particularly in areas containing a greater density of feeding trees. About half (51%) of the sleeping sites were composed of a single large tree (mean ± SD diameter at breast height, 42.2 ± 21.9 cm) from a small number of tree species, such as Lonchocarpus castelloi, Bucida buceras, and Lysiloma latisiliquum. These results suggest that the current level of timber extraction seems to have no effect on the density, distribution, and composition of sleeping sites. Nevertheless, because the species that were selected as sleeping trees are subject to timber extraction, the availability of sleeping sites is expected to decrease in coming decades, potentially modifying the habitat use of this primate species.


5.
- Artículo con arbitraje
Anfibios y reptiles asociados a tres especies de bromelias de tanque en el Parque Nacional Guanahacabibes, Cuba
García González, Alfredo ; García Padrón, Lázaro Yusnaviel (coaut.) ; Delgado Fernández, Freddy (coaut.) ; Riverón Giró, Frander Brian (coaut.) ;
Contenido en: Cuadernos de Investigación UNED Vol. 6, no. 1 (junio 2014), p. 87-97 ISSN: 1659-4266
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Resumen en: Español | Inglés |
Resumen en español

Se estudió la herpetofauna asociada a tres especies de bromelias de tanque en un bosque seco semideciduo sobre carso desnudo en el Parque Nacional Guanahacabibes, Cuba. Se seleccionaron 20 plantas adultas de cada una de las especies de bromelias (Tillandsia utriculata, T. fasciculata, Hohenbergia penduliflora). Determinamos las especies y altura de los árboles en los que las bromelias estaban creciendo. Removimos cada bromelia del árbol y se listaron las especies de anfibios y reptiles que se encontraron. Se calculó la abundancia relativa y el índice de dominancia de cada especie zoológica, y construimos un gráfico de diversidad. Había 34 anfibios y reptiles, de ocho especies (cinco familias). Cuatro especies son endémicas de Cuba (tres anfibios y un reptil). De las bromelias muestreadas 31,67% estaban ocupadas por herpetofauna, 67,65% de los animales se encontraron en T. utriculata. La herpetofauna tiende a preferir las bromelias a 2,31-3,20m de altura (categoría “Medio”). La especie más dominante fue Eleutherodactylus varians (abundancia relativa de 55,88%). Estas bromelias de tanque pueden considerarse como especies clave, su papel es primordial en estos bosques secos semideciduos (fundamentalmente T. utriculata) y los recursos que proporcionan son esenciales para la herpetofauna, particularmente para el anuro endémico E. varians.

Resumen en inglés

The herpetological fauna associated to three species of tank bromeliads was studied in a semideciduous dry forest on naked karst in the Guanahacabibes National Park, Cuba. We selected 20 adult plants of each one of the bromeliad species (Tillandsia utriculata, T. fasciculata, Hohenbergia penduliflora). We determined the tree species and height where bromeliads were growing on. Each bromeliad was removed from its tree and the species and number of each amphibian and reptile were listed. The relative abundance and dominance index of each zoological species were calculated and a dominance-diversity graphic was constructed. There were 34 amphibian and reptiles, belonging to eight species (five families). Four species were endemic to Cuba (three amphibians and one reptile). Of all bromeliads sampled 31,67% had herpetofauna, 67,65% of all animals were found in T. utriculata. The animals seem to prefer bromeliads 2,31-3,20m above ground (category “Medio”). The dominant species was Eleutherodactylus varians (relative abundance of 55,88%). These tank bromeliads can be considered key species, thus their role is paramount in these semideciduous dry forest (mainly T. utriculata) and the resources they provide are essential for the herpetofauna, particularly for the endemic anuran E. varians.


6.
- Artículo con arbitraje
*En hemeroteca, SIBE-San Cristóbal
Effects of climate and forest age on plant and caterpillar diversity in the Yucatan, Mexico
Essens, Tijl ; Leyequién Abarca, Eurídice (coaut.) ; Pozo, Carmen (coaut.) ; Vester, Henricus F. M. (coaut.) ; Hernández Arana, Héctor Abuid (coaut.) ;
Contenido en: Journal of Tropical Ecology Vol. 30, no. 5 (September 2014), p. 419-434 ISSN: 0266-4674
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
53730-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en: Inglés |
Resumen en inglés

Understanding patterns in plant and herbivorous insect diversity across spatial and temporal scales is fundamental to ecology, but comparative multi-taxonomic studies in tropical seasonally dry forests remain scarce. In 36 sites, distributed over three forest age classes (5–10 y, 10–30 y, >100 y) and three seasonal forest types (dry, intermediate, humid), we sampled plants of different stem diameter classeswhile caterpillars were sampled across vertically distributed forest layers during three seasons over the year. We recorded 299 plant species and 485 caterpillar morphospecies. For large woody plants, species numbers showed a gradually increasing trend with forest age in the intermediate and humid forest types, while the main portion of explained variation in overall species turnover was accounted for by the forest type × forest age interaction (21.3–23.1% of 44.4–48.7%). Ordinations and multivariate pairwise comparisons suggested a faster but also very distinct successional development of species diversity of large plants in the driest compared with humid and intermediate forest types. In contrast, highest species numbers of small plants in the undergrowth was often found in the 5–10 y-old vegetation across forest types, whereas forest type was the major factor in overall species turnover (contributing 24.2% of 48.7% explained variation). Caterpillar species turnover was most correlated to species turnover of small plants; however, variation in caterpillar species diversity appears to be mostly regulated by seasonal cues, and to a lesser extent by patterns of regional turnover and local diversity of undergrowth plant species


7.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Diversidad de microartrópodos (ácaros y colémbolos) de musgos corticícolas en la selva baja de Nicolás Bravo, Quintana Roo
Várguez Noh, Wendy P. ; Cutz Pool, Leopoldo Q. (coaut.) ;
Contenido en: Acta Zoológica Mexicana Nueva Serie, Vol. 29, no. 3 (diciembre 2013), p. 654-665 ISSN: 0065-1737
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
53198-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en: Español | Inglés |
Resumen en español

Se compara la diversidad de los microartrópodos (ácaros y colémbolos) en musgos corticícolas de una selva baja inundable de Nicolás Bravo, Quintana Roo, para las temporadas de secas, lluvias y nortes de 2011. Se registraron 28 familias de microartrópodos corticícolas, entre las cuales Galumnidae (52.36%), Isotomidae (10.45%) y Scheloribatidae (9.68%) fueron las más abundantes, representando el 72%, además que mostraron su máxima abundancia en la temporada de lluvias. Se determinó que hay una variación temporal en la densidad de microartrópodos (F (2,27) = 10.62, p<0.05); la mayor densidad se encontró en la temporada de lluvias. La mayor diversidad se registró entre la temporada de secas y nortes. La mayor similitud se observó entre las temporadas de lluvias y nortes (71.58%). Para las familias Isotomidae, Phytoseiidae, Trombididae, Scheloribatidae y Galumnidae se encontró una correlación positiva entre la humedad del musgo y las densidades, mientras que la densidad de Anystidae y Caeculidae mostraron una correlación negativa con la humedad del musgo.

Resumen en inglés

The diversity of microarthropods (mites and springtails) in corticolous moss was compared in the floodable lowland Nicolás Bravo, Quintana Roo, included six sampling, carried out in dry, rainy and north season of 2011. 28 families of microarthropods from corticolous moss were recorded, among which the Galumnidae (52.36%), Isotomidae (10.45 %) and Scheloribatidae (9.68%) families were the most abundant, making up 72%, further that showed their maximum abundance at rainy season. There was temporal variation in the density of microarthropods (F (2, 27) = 10.62, p<0.05); the highest density was found at rainy season. The highest diversity was recorded between dry and north season. The highest similarity was observed between rainy and north season (71.58%). For the families Isotmidae, Phytoseiidae, Trombididae, Scheloribatidae and Galumnidae there was a positive correlation between moisture from moss and density while the density of Anystidae and Caeculidae was negatively correlated with moss moisture.


8.
Tesis - Maestría
Evaluación de la conectividad del paisaje Puuc–Chenes, México, con base en los requerimientos del jaguar (Panthera onca) / Eduardo Antonio Salazar Sosa
Salazar Sosa, Eduardo Antonio ; Mendoza Vega, Jorge (tutor) ; Ochoa Gaona, Susana (asesora) ; Kú Quej, V. M. (asesor) ; Hidalgo Mihart, Mircea Gabriel (asesor) ;
Lerma, Campeche, México : El Colegio de la Frontera Sur , 2013
Clasificación: TE/599.744280972 / S2
Cerrar
SIBE Campeche
ECO040005088 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
ECO030007819 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010007462 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020012919 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050005296 (Disponible)
Disponibles para prestamo: 1
PDF
Índice

Abreviaturas
Introducción General
Justificación
Objetivos
Hipótesis
Artículo. Evaluación de la conectividad del paisaje Puuc-Chenes, México, con base en los requerimientos del jaguar (Panthera onca)
Resumen
Introducción
Materiales y Métodos
Resultados
Discusión
Conclusiones
Agradecimientos
Literatura citada
Anexos
Conclusiones Generales
Aspectos Éticos en la investigación
Literatura Genera


9.
- Artículo con arbitraje
Contribución de la riqueza y la uniformidad a la diversidad de aves en plantaciones de café de sombra del sureste de México
Altamirano González Ortega, Marco Antonio (autor) ; Enríquez Rocha, Paula Lidia (autora) ; Rangel Salazar, José Luis (autor) (1962-) ; García Estrada, Carlos (autor) ; Tejeda Cruz, César (autor) ;
Disponible en línea
Contenido en: Tropical and Subtropical Agroecosystems Vol. 15, no. 3 (2012), p. 629-647 ISSN: 1870–0462
PDF
Resumen en: Español | Inglés |
Resumen en español

En este estudio se examina la contribución de la riqueza y la uniformidad en la diversidad de aves y su la relación con covariables de la vegetación en un paisaje cafetalero en el sur de México. La riqueza y abundancia de especies se registró en 2010 y 2011 en selva alta siempre vede y tres tipos diferentes de sistemas de producción de café. Los cambios en los valores de riqueza de especies y la uniformidad se detectaron mediante un análisis SHE (S = riqueza de especies, H = diversidad y E = uniformidad). La diversidad verdadera (el número efectivo de especies que en realidad representan la diversidad de especies en las muestras) también fue estimado. La cobertura arbórea, la cobertura de arbustos y altura de los árboles fueron las covariables de la vegetación que explicaron la variación en la riqueza y abundancia de las especies. El análisis SHE indicó que los valores acumulativos de la diversidad de aves en todas las parcelas aumentaron junto con la riqueza de especies, mientras los valores de la uniformidad de especies disminuían. Esta condición cambio con las actividades de manejo de café y / o la llegada de las aves migratorias. La diversidad verdadera, cuando todas las especies tenían un peso proporcional a su abundancia (q = 1), fue superior en todas las parcelas que cuando se les dio un mayor peso a las especies dominantes (q = 2). Las prácticas de manejo en la cobertura arbórea, cobertura de arbustos y la migración de las aves, podrían explicar los cambios en la riqueza de especies y la uniformidad durante el ciclo agrícola.

Resumen en inglés

This study examines the contribution of the richness and uniformity in the diversity of birds, and their relationship with covariates of vegetation in a coffee landscape in southern Mexico. Species richness and abundance was recorded in 2010 and 2011 in evergreen forests and three different types of coffee production systems. Changes in the values of species richness and uniformity were detected by a SHE analysis (S = species richness, H = diversity and E = evenness). True diversity (the actual number of species actually represent the diversity of species in the samples) was also estimated. The tree cover, shrub cover and tree height were covariates of vegetation that explained the variation in species richness and abundance. SHE analysis indicated that cumulative values of bird diversity increased in all plots with species richness, while the values of uniformity of species decreased. This condition changed with management activities of coffee and / or the arrival of migratory birds. The true diversity, when all species had a weight proportional to its abundance (q = 1), was higher in all plots when they were given greater weight to the dominant species (q = 2). Management practices of tree cover and shrubs and bird migration could explain changes in species richness and uniformity during the agricultural cycle.


10.
- Artículo con arbitraje
PDF PDF
Resumen en: Inglés |
Resumen en inglés

The southern Yucatán contains the largest expanse of seasonal tropical forests remaining in Mexico, forming an ecocline between the drier north of the peninsula and the humid Petén, Guatemala. The Calakmul Biosphere Reserve resides in the center of this region as part of the Mesoamerican Biological Corridor. The reserve’s functions are examined in regard to land changes throughout the region, generated over the last 40 years by increasing settlement and the expansion and intensification of agriculture. These changes are documented from 1987/1988 to 2000, and their implications regarding the capacity of the reserve to protect the ecocline, forest habitats, and butterfly diversity are addressed. The results indicate that the current landscape matrix serves the biotic diversity of the reserve, with several looming caveats involving the loss of humid forests and the interruption of biota flow across the ecocline, and the amount and proximity of older forest patches beyond the reserve. The highly dynamic land cover changes underway in this economic frontier warrant an adaptive management approach that monitors the major changes underway in mature forest types, while the paucity of systematic ecological and environment–development studies is rectified in order to inform policy and practice.