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The cloud forest (CF) is one of the ecosystems with less surface and the most threatened in Mexico. This paper presents information on the richness, relative abundance, activity and reproductive data of medium and large mammals in the CF located in the Sierra de Manantlán Biosphere Reserve. Between February 2008 and August 2009, we used camera-traps with which we obtained 372 independent records, corresponding to 17 species. We believe this data supports an appropriate choice of method and monitoring sites; but also data on richness, abundance and reproduction of the species indicate that the ecosystem is properly preserved in the area, which is consistent with recently reported Conabio. Therefore we recommend establishing monitoring activities in the medium and long term in multiple sites, which could complement the assessment that has been undertaken at national level in this ecosystem. Source

Aranda M.,Comision Nacional de Areas Naturales Protegidas | Valenzuela-Galvan D.,Autonomous University of the State of Morelos
Revista Mexicana de Biodiversidad

In June2014, we confirmed the presence of margay (Leopardus wiedii) in fraction I of the Área de Protección de Flora y Fauna Corredor Biológico Chichinautzin, Morelos, Mexico. Our record is based in 4 video clips taken by an automatic camera located at 2,750 m of altitude, with cloud forest. This record is the second confirmed evidence of the presence of margay populations in the state of Morelos, and it is the first record of the species for the Corredor Biológico Chichinautzin, expanding the distribution range of margay into Central Mexico by nearly 60 km to the north-northwest of the site where it was first recorded for Morelos, at the Sierra de Huautla Biosphere Reserve. © 2015 Universidad Nacional Autónoma de México, Instituto de Biología. Source

Duran-Fernandez A.,Comision Nacional de Areas Naturales Protegidas | Aguirre-Rivera J.R.,Autonomous University of San Luis Potosi | Garcia-Perez J.,Autonomous University of San Luis Potosi | Levy-Tacher S.,Colegio de Mexico | De Nova-Vazquez J.A.,Autonomous University of San Luis Potosi
Botanical Sciences

The Lacandon community Nahá is located at the north of the Lacandon rain forest, at the Municipality of Ocosingo, Chiapas; their vegetation preserves some areas with mature rain forest and the rest is subject to traditional diversified and intensified advantage. Results indicate that the preliminary vascular flora includes 118 families, 344 genera and 504 species, mainly in the rain forest. Ten species are listed in some risk category in the Norma Oficial Mexicana (NOM-059-SEMARNAT-2010). Trees are the more abundant life forms in the region, followed by herbaceous, epiphytes, and shrubs. Common names for 366 species were recorded, and some use for 239 of them. Twenty-five new records are presented for 22 species not previously reported for Chiapas, and three for México. The species richness and conservation status of the mature vegetation in the studied area highlight the importance for its conservation. Traditional knowledge of Lacandon people has maintained this diversity in spite of the constant developmental pressures by the human establishments surrounding the area. © 2016, Sociedad Botanica de Mexico, A.C. All rights reserved. Source

Adame M.F.,Griffith University | Santini N.S.,University of Queensland | Tovilla C.,Colegio de Mexico | Vazquez-Lule A.,Comision Nacional para el Conocimiento y Uso de la Biodiversidad CONABIO | And 2 more authors.

Riverine wetlands are created and transformed by geomorphological processes that determine their vegetation composition, primary production and soil accretion, all of which are likely to influence C stocks. Here, we compared ecosystem C stocks (trees, soil and downed wood) and soil N stocks of different types of riverine wetlands (marsh, peat swamp forest and mangroves) whose distribution spans from an environment dominated by river forces to an estuarine environment dominated by coastal processes. We also estimated soil C sequestration rates of mangroves on the basis of soil C accumulation. We predicted that C stocks in mangroves and peat swamps would be larger than marshes, and that C, N stocks and C sequestration rates would be larger in the upper compared to the lower estuary. Mean C stocks in mangroves and peat swamps (784.5 ± 73.5 and 722.2 ± 63.6 MgC ha-1, respectively) were higher than those of marshes (336.5 ± 38.3 MgC ha-1). Soil C and N stocks of mangroves were highest in the upper estuary and decreased towards the lower estuary. C stock variability within mangroves was much lower in the upper estuary (range 744-912 MgC ha−1) compared to the intermediate and lower estuary (range 537-1115 MgC ha-1) probably as a result of a highly dynamic coastline. Soil C sequestration values were 1.3 ± 0.2 MgC ha-1 yr-1 and were similar across sites. Estimations of C stocks within large areas need to include spatial variability related to vegetation composition and geomorphological setting to accurately reflect variability within riverine wetlands. © Author(s) 2015. Source

Del Monte-Luna P.,National Polytechnic Institute of Mexico | Guzman-Hernandez V.,Comision Nacional de Areas Naturales Protegidas | Cuevas E.A.,Research Center Estudios Avanzados | Arreguin-Sanchez F.,National Polytechnic Institute of Mexico | Lluch-Belda D.,National Polytechnic Institute of Mexico
Journal of Experimental Marine Biology and Ecology

The recent decline of nesting hawksbill turtles (Eretmochelys imbricata) in the southern Gulf of Mexico (SGM) has been partly attributed to climate change, but the evidences to support this idea are still developing. In sea turtles, the recruitment success and remigration interval (the interval between two successive nesting seasons) are related to interannual variations in oceanographic conditions at the turtles' developmental habitats. However, the effect of low-frequency environmental variability has not been well documented. The relative changes in the numbers of nesting hawksbill turtles related to climate variability in the SGM and North Atlantic, during the 1980-2010 period, were analysed using the time series techniques to determine: 1) whether there are periodic signals in the series, and 2) whether any such signals parallel climate variations of similar frequency at local, regional and basin-wide spatial scales. A 7-year cycle in annual relative number of nesting hawksbill turtles in the SGM was found, which is superimposed upon a negative long-term trend. Both signals are inversely correlated with cycles of similar periodicity in the North Atlantic sea surface temperature (SST). These results suggest that the long-term population dynamics of hawksbill turtles in the SGM are related to a basin-wide, quasi-decadal environmental fluctuation in the North Atlantic. This relationship may be influenced by trophic interactions that are coupled to a decadal alternation between favourable and unfavourable ecological conditions occurring on basin-wide scales. Conservation planning for this species should focus on the potential effect of both linear increases in SST, as expected from current global warming trend, and long-term natural environmental variability. © 2011 Elsevier B.V. Source

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