scholarly journals HÁBITAT DE Hodomys alleni (RODENTIA: MURIDAE) EN LA SELVA BAJA CADUCIFOLIA EN LA REGIÓN CENTRAL DE COLIMA, MÉXICO

2015 ◽  
Vol 5 (1) ◽  
pp. 63
Author(s):  
Paulina Arias-Caballero de Miguel ◽  
Daniela Medellín ◽  
Yolanda Domínguez Castellanos ◽  
Gerardo Ceballos
Keyword(s):  
Deciduous Forest ◽  
Soil Depth ◽  
Total Sample ◽  
Dry Forest ◽  
Tree Cover ◽  
Conservation Strategies ◽  
Mexican Pacific ◽  
La Selva ◽  
Brosimum Alicastrum ◽  
Depth Feature

RESUMENSon pocas las áreas de selva baja caducifolia y selva mediana subcaducifolia en México y en este tipo de vegetación se encuentra uno de los pocos géneros monotípico de roedores, Hodomys alleni, una especie endémica de los bosques secos tropicales del Pacífico mexicano y también es una especie amenazada debido a la pérdida de su hábitat. El estudio se realizó en la selva baja de Colima, México, se capturaron 303 individuos, incluyendo 11 especies de roedores y 1 marsupial, H. alleni está representado sólo por un 17% de la muestra total. Los resultados revelaron que la distribución y selección del sitio de construcción de madrigueras de H. alleni están directamente relacionados con la profundidad del suelo, característica que resultó ser la más importante en determinar dicha selección. También se estableció una relación entre la muestra de 65 madrigueras y su ubicación en el suelo (43% huecos en el suelo, 51% en la base del árbol o tocón con materiales orgánicos y 6% entre las rocas sin material orgánico) todas estas estrechamente relacionadas con la profundidad del suelo, cubierta arbórea y área de suelo desnudo. 491 individuos de árboles fueron cuantificados constando de 60 especies. De las cuales 9 especies representan el 50% de la muestra total, siendo Acacia macilenta la especie más abundante y Albizia sp., Bursera sp., y Brosimum alicastrum las especies encontradas con mayor frecuencia alrededor de las madrigueras. Por otra parte las etapas reproductivas de H. alleni parecen estar fuertemente relacionadas con la estacionalidad (lluvias y secas), como en muchas otras especies que habitan en los bosques tropicales secos. Por otro lado, se encontraron hembras con mayor peso corporal y mayor longitud durante la estación seca y en ambas temporadas en comparación con los machos. Sin embargo, se necesitan más estudios para recopilar nueva información que pueda fortalecer nuestro objetivo de crear estrategias de conservación para estas y otras especies que dependen fuertemente de la estructura y la estacionalidad de estas pocas y frágiles selvas secas que aún perduran.Palabras clave: Hodomys alleni, selva baja, selva mediana, madrigueras, Colima.ABSTRACTFew areas of deciduous forest and deciduous tropical forest in Mexico and in this type of vegetation is one of the few monotypic genera of rodents, Hodomys alleni, an endemic species of tropical dry forests of the Mexican Pacific and is also a kind threatened due to habitat loss. The study was conducted in the lowland rainforest of Colima, Mexico, 303 individuals were captured, including 11 species of rodents and one marsupial, H. alleni is represented only 17% of the total sample. The results revealed that the distribution and site selection burrowing H. alleni are directly related to soil depth feature that proved to be the most important in determining that selection. A relationship between sample 65 burrows and its location on the ground (43% holes in the ground, 51% at the base of the tree or stump with organic materials and 6% among the rocks without organic material) was also established these closely related to soil depth, tree cover and area of bare ground. 491 trees were quantified individuals comprising 60 species. Of which 9 species represent 50% of the total sample, being the most abundant haggard Acacia and Albizia species sp., Bursera sp., and Brosimum alicastrum species most frequently found around the burrows. Moreover reproductive stages of H. alleni appear to be strongly related to the seasonality (rainy and dry), as in many other species that live in dry tropical forests. Furthermore, females have a greater and longer body weight were found in the dry season and in both seasons compared with males. However, more studies are needed to gather new information that can strengthen our goal of creating conservation strategies for these and other species that depend heavily on the structure and seasonality of these few and fragile dry forest that still survive.Key words: Hodomys alleni, deciduous forest, semi deciduous forest, burrows, Colima.

scholarly journals Madrigueras de Liomys pictus en dos selvas tropicales del Pacífico mexicano.

2009 ◽  
Vol 13 (1) ◽  
pp. 63 ◽  
Author(s):  
Yolanda Domínguez-Castellanos ◽  
Beatriz Hernandez Meza ◽  
Angeles Mendoza D. ◽  
Gerardo Ceballos González
Keyword(s):  
Seed Production ◽  
Tropical Forests ◽  
Plant Species ◽  
Deciduous Forest ◽  
Vegetation Type ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Mexican Pacific ◽  
La Selva

Resumen: Se determinó la estructura y el contenido de las madrigueras de Liomys pictus por tipo de vegetación y temporada del año, en dos selvas tropicales del Pacífico Mexicano. Se encontraron 24 madrigueras: en la selva baja la mayoría son complejas, mientras que  en la selva mediana son lineales, por consiguiente y de acuerdo a la clasificación de las madrigueras, en selva baja se presentaron madrigueras múltiples y en selva mediana madrigueras simples. De acuerdo al contenido, las de selva baja tienen en promedio una mayor cantidad de materiales en comparación a las de selva mediana. Se catalogaron un total de 248 especies de plantas de estas 50 se comparten en ambos sitios, del total de las especies se llegaron a identificar sólo 77. Las familias más representativas fueron Leguminoseae, Euphorbiaceae y Convolvulaceae. La estructura de las madrigueras no esta determinada por la temporalidad, sin embargo el contenido esta determinado con la cantidad de material almacenado aunque la producción de semillas esta definido por el patrón de fructificación que esta dado a lo largo del año.Palabras clave: Madrigueras, estructura, contenido, Liomys pictus, Jalisco, México.Abstract: We determined the structure and contents of burrows of Liomys pictus by vegetation type and season in two tropical forests of the Mexican Pacific. 24 burrows were found in the tropical dry forest and most complex, in the semi deciduous forest is linear, and therefore according to the classification of the burrows in the tropical dry forest are more numerous and simple in the semi deciduous forest. According to the content, of the tropical dry forest have on average a greater amount of material compared to the semi deciduous forest. Were categorized a total of 248 plant species of these 50 sites are shared in both the total number of species is to determine 77. The most representative families were Leguminoseae, Euphorbiaceae and Convulvolaceae. The structure of the burrows is not affected by the timing, but the content is determined with the amount of stored material but seed production is defined by the pattern of fruit that is given throughout the year.Key words: Burrows, structure, food hoarding, Liomys pictus, Jalisco, Mexico.

Nurses for Brosimum alicastrum reintroduction in secondary tropical dry forest

2004 ◽  
Vol 198 (1-3) ◽  
pp. 401-404 ◽  
Author(s):  
L.R Sánchez-Velásquez ◽  
S Quintero-Gradilla ◽  
F Aragón-Cruz ◽  
Ma.R Pineda-López
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest ◽  
Brosimum Alicastrum

Tree density, basal area and species diversity in a disturbed dry tropical forest of northern India: implications for conservation

2006 ◽  
Vol 33 (3) ◽  
pp. 256-262 ◽  
Author(s):  
R. SAGAR ◽  
J.S. SINGH
Keyword(s):  
Species Diversity ◽  
Tropical Forest ◽  
Basal Area ◽  
Tree Density ◽  
Dry Forest ◽  
Conservation Strategies ◽  
Stem Density ◽  
Dry Tropical Forest ◽  
Number Of Species ◽  
Northern India

Dry tropical forest communities are among the world's most threatened systems and urgent measures are required to protect and restore them in degraded landscapes. For planning conservation strategies, there is a need to determine the few essential measurable properties, such as number of species and basal area, that best describe the dry forest vegetation and its environment, and to document quantitative relationships among them. This paper examines the relationships between forest basal area and diversity components (number of species and evenness) for a disturbed dry tropical forest of northern India. Data were collected from five sites located in the Vindhyan dry tropical forest of India, selected on the basis of satellite images and field observations to represent the entire range of conditions in terms of canopy cover and disturbance regimes. These sites represented different communities in terms of species composition. The forest was poorer in species richness, and lower in stem density and basal area than wet forests of the tropics. Across sites (communities), the diversity components and tree density were positively related with total tree basal area. Considering basal area as a surrogate of biomass and net production, diversity is found to be positively associated with productivity. A positive relationship between basal area, tree density and species diversity may be an important characteristic of the dry forest, where recurring disturbance does not permit concentration of biomass or stems in only a few strong competitors. However, the relationships of basal area with density, alpha diversity and evenness remain statistically significant only when data from all sites, including the extremely disturbed one, are used in the analysis. In some sites there was a greater coefficient of variation (CV) of basal area than in others, attributed to patchy distribution of stems and resultant blanks. Therefore, to enhance the tree diversity of these forests, the variability in tree basal area must be reduced by regulating local disturbances. Conservation activities, particularly fuelwood plantations near human settlements, deferred grazing and canopy enrichment through multi-species plantations of nursery-raised or wild-collected seedlings of desirable species within the forest patches of low basal area, will be needed to attain restoration goals, but reforestation programmes will have to be made attractive to the forest-dwelling communities.

scholarly journals Mammals in tropical dry forest on the central coast of Oaxaca, Mexico

Check List ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 1862 ◽  
Author(s):  
Miguel Briones-Salas ◽  
Natalia Martín-Regalado ◽  
Mario C. Lavariega
Keyword(s):  
Deciduous Forest ◽  
Species Turnover ◽  
Tropical Dry Forest ◽  
Similarity Index ◽  
Dry Forest ◽  
Central Coast ◽  
Semideciduous Forest ◽  
Southern Mexico ◽  
Additional Information ◽  
Mammal Diversity

The tropical dry forests of Mexico are one of the world’s biodiversity hotspots. To contribute to the knowledge of mammal diversity and conservation of the central coast of Oaxaca State, southern Mexico, we conducted field surveys in the area. Additional information was obtained from literature and museum databases. In order to compare the taxonomic similitude between areas along the Planicie Costera del Pacífico province we performed a taxonomic similarity analysis using data from the literature and the present study. A total of 49 species of mammals belonging to 19 families and eight orders were recorded. The maximum number of species was recorded in deciduous forest (n = 46), followed by semideciduous forest (n = 11). The similarity index was low (<50%) between areas along the Planicie costera del Pacífico, indicating higher species turnover. The high mammal diversity, the presence of endemic (8%), threatened species (16%), and voluntary conservation areas highlight the importance of this region.

Diversity of Convolvulaceae from Meruoca Massif, Ceará, Brazil

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Diego Santos ◽  
Marlene Feliciano Figueiredo ◽  
Maria Teresa Buril ◽  
Elnatan Bezerra de Souza
Keyword(s):  
Atlantic Forest ◽  
Geographic Distribution ◽  
Morphological Analysis ◽  
Deciduous Forest ◽  
The State ◽  
Identification Key ◽  
Dry Forest ◽  
Diagnostic Characters ◽  
Taxonomic Treatment ◽  
Northwest Region

Abstract We present the taxonomic treatment of Convolvulaceae for the Meruoca Massif, located in the Northwest region of the Ceará state, where there are remnants of Tropical Pluvial Sub-deciduous Forest (Dry Forest) and Tropical Pluvial-Nebular Rainforest (Wet Forest). The present study was based on the morphological analysis of specimens collected in the field and from the collections EAC, HUEFS, HUVA, PEUFR, and SPF. We recorded 24 species distributed in four genera: Ipomoea (18 species), Jacquemontia (three species), Distimake (two species), and Camonea (one species). We report the first records of I. cearensis for Atlantic Forest and I. aristolochiifolia to the state of Ceará. The taxonomic treatment includes identification key, morphological descriptions, geographic distribution, taxonomic and ecological comments, the period of flowering and fruiting, and photos and illustrations of the diagnostic characters.

Use of Trill Vocalizations To Coordinate Troop Movement Among White-Faced Capuchins: a Second Field Test

Behaviour ◽  
1995 ◽  
Vol 132 (11-12) ◽  
pp. 875-901 ◽  
Author(s):  
Aimee F. Campbell ◽  
Sue Boinski
Keyword(s):  
Costa Rica ◽  
Pacific Coast ◽  
Leading Edge ◽  
Cebus Capucinus ◽  
Dry Forest ◽  
Forest Site ◽  
La Selva ◽  
Behavioural Effects ◽  
Specific Direction ◽  
Group Members

AbstractThe white-faced capuchin, Cebus capucinus, employed a specialized vocalization, the trill, to coordinate troop movement at La Selva, an Atlantic wet-forest study site in Costa Rica. We analyse the contexts in which this intra-group vocalization was emitted, including responses elicited from other group members. A cumulative 26.6 hours of continuous samples and 3,314 spectrograms (including 1,295 trills) were analysed from a study troop with 16 focal subjects. These results generally corroboratc the conclusions of a comparable field study of white-faced capuchins at Santa Rosa, a Pacific coast dry-forest site in Costa Rica (BOINSKI, 1993, Amer. J. Primatol. 30, p. 85-100). At both sites, (I) trills were closely associated with the initiation of movement by a stationary troop in a specific direction. (2) Trills were emitted at a much higher rate in the leading edge of a travelling troop than in following positions. (3) Individuals often reinforced the efforts of other troop members to coordinate troop movement. (4) Lack of consensus among troop members over the travel route was evident. (5) In rare instances trills were employed in tactical maneuvers suggestive of intentionality and the ability to anticipate behavioural effects. Differences in the usage of trills at these two sites were also detected. (1) At La Selva all troop members, with the exception of infants, used trills in the coordination of troop movement, whereas at Santa Rosa marked age, sex and rank distinctions in the extent of participation were apparent. (2) Capuchins at Santa Rosa altered the trajectory of travelling troops with trills, even reversing directions, but not at La Selva. These disparities may follow from differences between the sites in the extent of visual and auditory contact typical among troop members, social structure, susceptibility to predation, and possible genetic variation.

Growth ecology of the tree lizard Urosaurus bicarinatus (Squamata: Phrynosomatidae), in a tropical dry forest of the Chamela Region, Mexico

2016 ◽  
Vol 66 (2) ◽  
pp. 189-199 ◽  
Author(s):  
Aurelio Ramírez-Bautista ◽  
Uriel Hernández-Salinas ◽  
J. Gastón Zamora-Abrego
Keyword(s):  
Growth Rate ◽  
Life History ◽  
Growth Rates ◽  
Average Rate ◽  
Growth Patterns ◽  
Dry Forest ◽  
Von Bertalanffy ◽  
Mexican Pacific ◽  
Males And Females ◽  
Tree Lizard

Determination of growth rate provides an important component of an organism’s life history, making estimations of size at maturity, survival rate, and longevity possible. Here, we report on growth rate of males and females of the tropical tree lizard Urosaurus bicarinatus, in a seasonal environment in the state of Jalisco on the Mexican Pacific Coast. We calculated body growth rates and fitted these to the Von Bertalanffy, the logistic-by-length, and the logistic-by-weight growth models. The Von Bertalanffy model provided the best fit, and we used it to analyze the growth pattern. Males and females did not differ in estimated asymptotic size and other characteristic growth parameters. Estimated growth curve predicted an age at maturity of 38 mm SVL on 120 days for males, and 40 mm SVL on 170 days for females. On the basis of the similarities in the growth rates between the sexes, comparisons were made between seasons, and we found that the average rate of growth was slightly, albeit insignificantly, higher in the rainy season than in the dry season. The similarities in the growth patterns for the sexes of this species might be indicative of variance in its life history traits (e.g., fecundity, egg size) compared to those of other populations of this species and other species of this genus; therefore, it is important to document interpopulation differences to understand the evolutionary changes that have led to optimal adaptation in a particular environment more accurately.

scholarly journals The Endangered yellow-headed parrot Amazona oratrix along the Pacific coast of Mexico

Oryx ◽  
2010 ◽  
Vol 44 (4) ◽  
pp. 602-609 ◽  
Author(s):  
Tiberio Cesar Monterrubio-Rico ◽  
Katherine Renton ◽  
Juan Manuel Ortega-Rodríguez ◽  
Alejandro Pérez-Arteaga ◽  
Ramón Cancino-Murillo
Keyword(s):  
Ecological Niche ◽  
Pacific Coast ◽  
Deciduous Forest ◽  
Iucn Red List ◽  
Conservation Strategies ◽  
Ecological Niche Models ◽  
Current Range ◽  
The Pacific ◽  
Amazona Oratrix ◽  
Niche Models

AbstractThe yellow-headed parrot Amazona oratrix is categorized as Endangered on the IUCN Red List but little is known about its distribution, particularly along the Pacific coast of Mexico. We used ecological niche models, with presence records from museum collections and historical sightings, overlain on vegetation maps, to predict the historical range of the yellow-headed parrot along the Pacific coast of Mexico. We compared this with the current range of the species, estimated with ecological niche models using presence–absence data from surveys during 2003–2008. We estimate that the range of the yellow-headed parrot along Mexico’s Pacific coast has contracted by 79%. The current range may now cover only 18,957 km2, in three main areas. At one of these, a small isolated area on the coast of Jalisco, the species may be vulnerable to extirpation or genetic endogamy. There is a lack of conserved tropical semi-deciduous forest, which provides optimal habitat for reproduction of this parrot, within the current range of the species. Only the south, along the coast of Oaxaca, has extensive areas of this habitat. There are only three, small, protected areas within the species’ current range. Conservation strategies need to be implemented to restore connectivity between the three main areas of the current range of the yellow-headed parrot on the Pacific coast of Mexico.

scholarly journals Aspects of the population biology of the gregarious tree Cordia elaeagnoides in Mexican tropical deciduous forest

1996 ◽  
Vol 12 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Jan M. Van Groenendael ◽  
Stephen H. Bullock ◽  
L. Alfredo Pérez-Jiménez
Keyword(s):  
Population Biology ◽  
Deciduous Forest ◽  
Size Structure ◽  
Dry Forest ◽  
Tropical Deciduous Forest ◽  
Timber Species ◽  
Large Area ◽  
Embryo Abortion ◽  
Southern Mexico ◽  
Canopy Tree

ABSTRACTCordia elaeagnoides is locally important within a large area of southern México as a highly gregarious canopy tree of dry forest and as a timber species. Its recruitment is problematic so studies of its reproduction and population dynamics were undertaken. The distylous flowers are apparently self-compatible, and pollination and seed dispersal are by wind. Pre-dispersal mortality is largely from embryo abortion, and post-dispersal predation is mostly by generalist rodents. Some seeds may survive in enforced dormancy for two or more years. Recruitment was apparently absent for more than a decade, but had previously occurred within established stands, where size classes were interspersed at random. Population size structure suggests that recruitment over the last century occurred in several pulses. Growth rates determined from ring counts and remeasurement of marked trees support a size-age relationship. The youngest reproductive trees are estimated to be about 18 years old, and about 5% of the present population is over 95 years old.

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