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89 resultados encontrados para: TEMA: Coníferas
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1.
Libro
Cone and seed insects of North American conifers / Alan F. Hedlin, Harry O. Yates III, David Cibrián Tovar, ...[et al.]
Hedlin, Alan F. (autor) ; Yates III, Harry O. (autor) ; Cibrián Tovar, David (autor) ; Ebel, Bernard H. (autor) ;
Ottawa, Canada : Environment Canada, Canadian Forestry Service , s.f.
Clasificación: 634.967 / C6
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
SAA007823 (Disponible) , SAA007822 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Tapachula
ECO020005400 (Disponible)
Disponibles para prestamo: 1

2.
Artículo - Nota científica con arbitraje
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

La Estación Biológica San José (EBSJ) es la primera estación de clima templado en los Altos de Chiapas con un enfoque dedicado a la conservación de los últimos refugios de vida silvestre en la zona. Los estudios integrales en estaciones biológicas son de prioridad para generar conocimiento científico, así como manejar, mantener y conservar las especies y los sistemas ecológicos a los que pertenecen. Los muestreos en campo en la EBSJ se realizaron en 2007, 2010, 2015 y 2016. La captura de roedores se realizó con trampas Sherman, de musarañas con trampas Pitfall y de murciélagos con redes de niebla. Mediante observación directa se registraron mamíferos medianos y grandes. Las especies registradas fueron listadas por su nombre común en español y Tzotzil. Además, se realizó búsqueda bibliográfica y se utilizaron las bases de datos de Global Biodiversity Information Facility y la Colección Mastozoológica de El Colegio de la Frontera Sur. El estado de conservación de cada especie se identificó con base en la lista roja de la Unión Internacional para la Conservación de la Naturaleza (IUCN) y la Norma Oficial Mexicana 059 (NOM-059) de la SEMARNAT. El listado de los mamíferos de la EBSJ contiene 23 especies comprendidas en 8 órdenes y 13 familias. Del total de especies, dos son endémicas a Chiapas, Peromyscus zarhynchus y Cryptotis griseoventris. En la IUCN Cryptotis griseoventris está en la categoría de peligro (con pocos registros desde hace 62 años) y Peromyscus zarhynchus como vulnerable. En la NOM-059, Reithrodontomys microdon está amenazada y P. zarhynchus sujeta a protección especial. Los bosques de encino-pino son indispensables para el mantenimiento de la biodiversidad de la región, ofrecen disponibilidad de recursos y conservan la fauna nativa. The creation of spaces for research on the biota is a key tool to understand the impacts and threats that currently affect forests in the Chiapas Highlands.

Resumen en inglés

The San José Biological Station (SJBE) is the first temperate station in the Chiapas Highlands dedicated to preserve the last wildlife refuges in the area. Comprehensive studies in biological stations are a top priority to generate scientific knowledge, as well as to manage, maintain and conserve both the species and the ecological systems to which they belong. Field sampling was carried out in 2007, 2010, 2015, and 2016 at SJBE. Rodents were captured with Sherman traps; shrews, with Pitfall traps; and bats, with mist nets. Medium-sized and large mammals were recorded by direct observation. The species recorded were listed by their common name in Spanish and Tzotzil. In addition, a bibliographic search was conducted and the databases of the Global Biodiversity Information Facility and the Mammal Collection at El Colegio de la Frontera Sur were used. The conservation status of each species was identified based on the red list of the International Union for the Conservation of Nature (IUCN) and the Mexican Official Norm 059 (NOM-059) by SEMARNAT. The list of mammals recorded at SJBE includes 23 species in 8 orders and 13 families. Of the total number of species, two are endemic to Chiapas, Peromyscus zarhynchus and Cryptotis griseoventris. In the IUCN, Cryptotis griseoventris is listed as endangered (with few records for 62 years), and Peromyscus zarhynchus as vulnerable. In NOM-059, Reithrodontomys microdon is listed as threatened and P. zarhynchus as subject to special protection. Oak-pine forests at SJBE are essential for the maintenance of biodiversity in the region, offer resources and preserve the local native fauna. The creation of spaces for research on the biota is a key tool to understand the impacts and threats that currently affect forests in the Chiapas Highlands.


3.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Can cattle grazing substitute fire for maintaining appreciated pine savannas at the frontier of a montane forest biosphere-reserve?
Braasch, Marco ; García Barrios, Luis Enrique (coaut.) ; Ramírez Marcial, Neptalí (coaut.) (1963-) ; Huber Sannwald, Elisabeth (coaut.) ; Cortina Villar, Héctor Sergio (coaut.) (1960-) ;
Contenido en: Agriculture, Ecosystems & Environment Vol. 250 (December 2017), p. 59–7 ISSN: 0167-8809
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Human induced savannas in subtropical regions are often favored by small-holder farmers for livestock production and extraction of wood or non-wood products. Frequent burning and grazing are required to maintain the savanna vegetation structure. However, in conservation areas, fire suppression is promoted to avoid wildfires; whereas domestic livestock grazing is considered a strong interfering factor for tree establishment, due to trampling and browsing. In tropical forests which were converted to savannas, competitive exotic grasses have often replaced the native grasses. Where exotic grasses are present, aboveground biomass accumulation and thus man-induced fire risk are high and potentially undermine tree recruitment. On the long-term, the savanna state may shift into a grass-dominated state with little tree cover, generating unfavorable conditions from a livelihood perspective. We examined this problem in a human-induced pine savanna in the La Sepultura Biosphere Reserve in Chiapas, Mexico. Smallholder farmers highly valued this savanna for both livestock production and resin extraction from the fire resistant pine Pinus oocarpa. However, fire suppression and the presence of exotic grasses are reducing the tree recruitment. The main research question was to what degree can cattle grazing replace fire in its role of biomass removal and thereby stimulate pine recruitment and maintain the desired savanna state. We determined current savanna extension in the region and interviewed farmers to reconstruct past savannazation processes and expansion of exotic grasses. We related adult species-specific tree density to the herbaceous-grass cover, and pine and oak seedling and sapling densities to understory vegetation cover, canopy closure, and cattle grazing history. Finally, a field experiment was conducted to examine the effects of livestock grazing on survival and growth of planted pine saplings.

The savanna currently covers 20% of the study site; it is the result of past slash-and-burn agriculture and selective logging, which have favored the expansion of several exotic grass species. In savannas where exotic grasses are abundant, sapling density was lower compared to sites with a native grass cover. While livestock grazing seemed to increase pine seedling density likely as a consequence of reduced grass cover, pine sapling survival however, was significantly reduced by livestock trampling. By seeking a balance between the livestock’s benefits and adverse effects on pine recruitment, farmers may develop an integrated management system adapted to their specific biotic rangeland conditions. It should allow forage production, while controlling the negative effects of exotic grasses on pine recruitment, thus maintaining a productive pine savanna system.


4.
Libro
Un acercamiento a los macrohongos de la Estación Forestal Experimental Zoquiapan, Estado de México / Emma Estrada Martínez, Lilia Pérez Ramírez, Karina Janett Pérez Castellanos
Estrada Martínez, Emma ; Pérez Ramírez, Lilia (coaut.) ; Pérez Castellanos, Karina Janett (coaut.) ;
Texcoco, Estado de México, México : Universidad Autónoma Chapingo , 2015
Clasificación: F/589.209725 / E8
Cerrar
SIBE Campeche
ECO040006053 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
ECO030008308 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010017884 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020013302 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050005837 (Disponible)
Disponibles para prestamo: 1
Resumen en: Español |
Resumen en español

Este pequeño catálogo da a conocer 40 especies de macrohongos presentes en la Estación Forestal Experimental Zoquiapan en el Estado de México, que se encuentra a cargo académica y administrativamente, de la División de Ciencias Forestales de la Universidad Autónoma Chapingo (UACh). La mayoría de los hongos fotografiados se pueden encontrar en otras regiones de bosques templados de las cadenas montañosas que forman la Sierra Nevada, y muchos de ellos también crecen en otras áreas montañosas de México. Este folleto puede ser usado para fines ecoturísticos, de preferencia por las personas poseedoras del conocimiento tradicional micològico (bongueros y hongueras), que han sido reconocidos en los estudios etnomicológicos como nuestros maestros prácticos en el campo.


5.
Libro
Bark beetles: biology and ecology of native and invasive species / edited by Fernando E. Vega, Richard W. Hofstetter
Vega, Fernando E. (editor) ; Hofstetter, Richard W. (aditor) ;
London, UK : Elsevier :: Academic Press , 2015
Clasificación: 595.768 / B3
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020013360 (Disponible) , ECO020013349 (Prestado) , ECO020013230 (Prestado)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

Bark Beetles: Biology and Ecology of Native and Invasive Species provides a thorough discussion of these economically important pests of coniferous and broadleaf trees and their importance in agriculture. It is the first book in the market solely dedicated to this important group of insects, and contains 15 chapters on natural history and ecology, morphology, taxonomy and phylogenetics, evolution and diversity, population dynamics, resistance, symbiotic associations, natural enemies, climate change, management strategies, economics, and politics, with some chapters exclusively devoted to some of the most economically important bark beetle genera, including Dendroctonus, Ips, Tomicus, Hypothenemus, and Scolytus. This text is ideal for entomology and forestry courses, and is aimed at scientists, faculty members, forest managers, practitioners of biological control of insect pests, mycologists interested in bark beetle-fungal associations, and students in the disciplines of entomology, ecology, and forestry.

Índice

1. Natural History of Bark Beetles
2. Morphology, Taxonomy and Phylogenetics of Bark Beetles
3. Evolution of Bark Beetles
4. Population Dynamics of Bark Beetles
5. Conifer Defense and Resistance to Bark Beetles
6. Symbiotic Associations of Bark Beetles: Ecology and Evolution
7. Natural enemies of bark beetles: Predators, parasitoids, pathogens and nematodes
8. Dendroctonus
9. Biology, Systematics, and Evolution of Ips
10. The genus
11. Hypothenemus, with Emphasis on the Coffee Berry Borer
12. Scolytus and Other Economically Important Bark and Ambrosia Beetles
13. Modeling Bark Beetle Responses to Climate Change
14. Management Strategies for Bark Beetles in Conifer Forests
15. Economy and Politics of Bark Beetles


6.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Positive effects of surrounding rainforest on composition, diversity and late-successional seed dispersal by bats
Vleut, Ivar Joeri Joannes ; Levy Tacher, Samuel Israel (coaut.) ; Galindo González, Jorge (coaut.) ; de Boer, Willem Frederik (coaut.) ;
Contenido en: Basic and Applied Ecology Vol. 16, no. 4 (June 2015), p. 308–315 ISSN: 1439-1791
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The configuration of a heterogeneous landscape has an important effect on species composition and landscape processes. The importance of the size, shape and habitat suitability of forest patches has been widely studied, but there is increasing evidence that the spatial context, e.g. adjacency or contact between two landscape elements, can have positive effects on ecological interactions, such as the movement of frugivorous bat species and seed dispersal. We compared the composition, diversity and richness of seed species transported by bats in rainforests and in secondary forests that were either partially or largely surrounded by rainforest, in relation to the fruit species’ life form and successional stage. To capture frugivorous bats we used mist nets with a plastic sheet placed below to allow dropped fruit and seeds from bat feces to be retrieved. Similar species composition and the highest diversity of transported seeds were found in rainforest and secondary forest largely surrounded by rainforest, while the highest number of seed species was recorded in rainforest and secondary forest partially surrounded by rainforest. More bats were captured transporting late-successional stage seeds in secondary forest largely surrounded by rainforest. This study demonstrates the importance of rainforest surrounding secondary forests to bat species’ movement and its positive effect on diversity and late-successional seed dispersal by bats. Maintaining large areas of rainforest around secondary forests is a useful management strategy for supporting high bat species diversity and abundance, and positively affects the transportation and potential dispersal of seed species of different successional stages.


7.
Artículo
Model comparisons for estimating carbon emissions from North American wildland fire
French, Nancy H. F. ; De Groot, William J. (coaut.) ; Jenkins, Liza K. (coaut.) ; Rogers, Brendan M. (coaut.) ; Alvarado, Ernesto (coaut.) ; Amiro, Brian (coaut.) ; De Jong, Bernardus Hendricus Jozeph (coaut.) ;
Contenido en: Journal of Geophysical Research-Biogeosciences Vol. 116 (May 2011), p. 1-21 ISSN: 0148-0227
PDF
Resumen en: Inglés |
Resumen en inglés

Research activities focused on estimating the direct emissions of carbon from wildland fires across North America are reviewed as part of the North American Carbon Program disturbance synthesis. A comparison of methods to estimate the loss of carbon from the terrestrial biosphere to the atmosphere from wildland fires is presented. Published studies on emissions from recent and historic time periods and five specific cases are summarized, and new emissions estimates are made using contemporary methods for a set of specific fire events. Results from as many as six terrestrial models are compared. We find that methods generally produce similar results within each case, but estimates vary based on site location, vegetation (fuel) type, and fire weather. Area normalized emissions range from 0.23 kg C m−2 for shrubland sites in southern California/NW Mexico to as high as 6.0 kg C m−2 in northern conifer forests. Total emissions range from 0.23 to 1.6 Tg C for a set of 2003 fires in chaparral-dominated landscapes of California to 3.9 to 6.2 Tg C in the dense conifer forests of western Oregon. While the results from models do not always agree, variations can be attributed to differences in model assumptions and methods, including the treatment of canopy consumption and methods to account for changes in fuel moisture, one of the main drivers of variability in fire emissions. From our review and synthesis, we identify key uncertainties and areas of improvement for understanding the magnitude and spatial-temporal patterns of pyrogenic carbon emissions across North America.


8.
- Artículo con arbitraje
*En hemeroteca, SIBE-San Cristóbal
Evaluación del efecto del follaje de árboles forrajeros y oligoguetos en el crecimiento del sorgo en condiciones de invernadero
Ávila, Marco ; Bautista, Francisco (coaut.) ; Huerta Lwanga, Esperanza (coaut.) ; Meléndez Ramírez, Virginia (coaut.) ;
Contenido en: Acta Zoológica Mexicana Nueva Serie., Número especial, Vol. 26, no. 2 (2010), p. 227-239 ISSN: 0065-1737
Nota: En hemeroteca, SIBE-San Cristóbal
PDF
Resumen en: Español | Inglés |
Resumen en español

Bajo condiciones de invernadero se analizó el efecto de la calidad del follaje de las especies arbóreas Diospyros cuneata, Bursera simaruba, Caesalpinia gaumeri, Randia longiloba, Gymnopodium floribundum y Piscidia piscicula, y de la lombriz de tierra Dichogaster bolaui en el crecimiento del sorgo. Se usaron cubetas de plástico conteniendo 2 kg de suelo, 100 g de follaje de cada especie y 1.2 g de lombrices. El diseño utilizado fue completamente al azar y los datos se analizaron con análisis de varianza y con un análisis de componentes principales para conocer la relación entre la calidad del follaje, el crecimiento del sorgo y la biomasa de lombrices. El follaje de B. simaruba y G. floribundum que aportaron las mayores cantidades de fósforo favorecieron la mayor producción de materia seca del sorgo, con o sin lombrices, aunque las mayores alturas de esta planta se correlacionaron con contenidos altos de Fibra Detergente/N. La aplicación de lombrices ocasionó un aumento de la biomasa total y la altura de las plantas de sorgo. El follaje de R. longiloba y C. gaumeri favorece a las poblaciones de D. bolaui pero no el crecimiento del sorgo. En el grupo de tratamientos con lombrices, el follaje de P. piscicula y D. cuneata mantuvo poblaciones favorables de lombrices, pero no beneficiaron el crecimiento del sorgo.

Resumen en inglés

Under greenhouse conditions we analyzed the effect of litter quality of the arboreal species Diospyros cuneata, Bursera simaruba, Caesalpinia gaumeri, Randia longiloba, Gymnopodium floribundum and Piscidia piscicula, and inoculation of the earthworm Dichogaster bolaui, on sorghum growth. Plastic pots were used containing 2 kg of soil, 100 g of foliage of each plant and 1.2 g of earthworms. The experimental design was completely randomized and the data submitted to ANOVA and principal components analysis to study the relationships between litter quality, sorghum growth and earthworm biomass. The foliage of B. simaruba and G. floribundum that have higher phosphorus favored the higher sorghum biomass, with or without earthworms, although plant heights were correlated with higher ratios of Detergent Fibre/N. Earthworm inoculation increased total biomass and the height of the sorghum plants. The foliage of R. longiloba and C. gaumeri favors the populations of D. bolaui but not sorghum plant growth. In the group of treatments with earthworms, the foliage of P. piscipula and D. cuneata supported favorable populations of earthworms, but did not benefit sorghum growth.


9.
Libro
Maderas y bosques argentinos / Lucas A. Tortorelli
Tortorelli, Lucas A. ; Guinier (pref.) ;
Buenos Aires, Argentina : Orientación Gráfica Editora , 2009
Clasificación: 634.970982 / T6
Bibliotecas: Villahermosa
Cerrar
SIBE Villahermosa
ECO050004584 (Disponible) , ECO050004583 (Disponible)
Disponibles para prestamo: 2

10.
- Artículo con arbitraje
*En hemeroteca, SIBE-San Cristóbal
Producción y descomposición de hojarasca en diferentes condiciones sucesionales del bosque de pino-encino en Chiapas, México
Rocha Loredo, Ana Guadalupe ; Ramírez Marcial, Neptalí (coaut.) (1963-) ;
Contenido en: Boletín de la Sociedad Botánica de México No. 84 (junio 2009), p. 01-12 ISSN: 0366-2128
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
47653-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
PDF
Resumen en: Español | Inglés |
Resumen en español

Se cuantificó la producción de hojarasca en comunidades sucesionales del boque de pino-encino en dos localidades de Chiapas y se evaluó simultáneamente la descomposición de hojarasca de siete especies (Alnus acuminata subsp. arguta, Chiranthodendron pentadactylon, Clethra suaveolens, Liquidambar styracifl ua, Quercus crassifolia, Quercus sapotifolia y Pinus oocarpa). Después de un año, la máxima acumulación de hojarasca se registró en el bosque de pino-encino (7.59±0.29 Mg·ha-1·año-1), seguido por el bosque de encino (6.58±0.27 Mg·ha-1·año-1), el bosque de pino-encino-Liquidámbar (5.33±0.18 Mg·ha-1·año-1), el bosque de pino (5.18±0.19 Mg·ha-1·año-1) y el menor aporte anual de hojarasca se registró en las parcelas bajo restauración forestal (2.43±0.13 Mg·ha-1·año-1). Después de 10 meses, la mayor descomposición de hojarasca ocurrió en Alnus acuminata (61-67%), independientemente de la condición forestal; en el resto de las especies la descomposición varió de 34-52% y no se detectaron diferencias entre las condiciones del bosque.

Resumen en inglés

Litter production was evaluated in successional pine-oak forests in two localities in Chiapas; simultaneously we assessed the leaf-litter decomposition of seven tree species (Alnus acuminata subsp. arguta, Chiranthodendron pentadactylon, Clethra suaveolens, Liquidambar styracifl ua, Quercus crassifolia, Quercus sapotifolia and Pinus oocarpa). After 1-year, the highest litter production was recorded in pine-oak-forests (7.59±0.29 Mg·ha-1·year-1), followed by the oak forests (6.58±0.27 Mg·ha-1·year-1), pineoak- Liquidambar forests (5.33±0.18 Mg·ha-1·year-1), pine forest (5.18±0.19 Mg·ha-1·year-1), and the lowest annual litter production occurred in the plots under forest restoration (2.43±0.13 Mg·ha-1·year-1). After 10-mo, the highest rate of leaf-litter decomposition occurred in Alnus acuminata (61-67%) regardless of the forest conditions and in the rest of the species, litter decomposition ranged from 34-52%, but not signifi cant differences between forest conditions were observed.