scholarly journals Distribution and conservation of the species of Marmosini (Didelphimorphia, Didelphidae) from Colombia

Author(s):  
Baltazar González ◽  
Federico Brook ◽  
Gabriel M. Martin

Abstract Marmosini species were taxonomically revised recently, however, little is known about their distribution and conservation. The aim of this research was to delimit the distribution of all species of Marmosini that inhabit Colombia, and analyze their conservation using potential distributions, protected areas, and human pressure data of the country. We used the widely known ecological niche modeling algorithm maxent to model the distribution of each species using two approaches to estimate the modeling area: a buffer-derived and an ecoregion-derived. After selecting a final model, we used data on protected areas and human pressure specific to Colombia, and analyze their conservation and pressure scenarios. Finally, we generated a species richness map for Marmosini in Colombia. We found that most species of Marmosini from Colombia co-occur at mid-elevations of the Andes with an upper elevation limit of maximum richness at ~ 2000 m. Marmosini species’ distribution covers 91% of the country's continental area, and the maximum area protected for any species of this group is between 29–5.4% of their modeled distribution. Most of the protected areas under strict and national conservation types presented small areas of high human pressure, while other categories (conservation units under managed resources and other conservation types) presented large areas of high human pressure. These species are poorly protected by the Natural Protected Areas of Colombia. Future reserves that cover Andean regions below 2000 m could help optimize their conservation.

2021 ◽  
Vol 15 (1) ◽  
pp. 81-92
Author(s):  
Alexandru-Ionuţ Petrişor ◽  
Liliana Elza Petrişor

The study of land cover and use changes is important for sustainability, given that they are part of the global changes affecting our environment. In order to understand the mechanisms determining them, land cover and use changes must be studied based on their associated transitional dynamics. The present research aims to look at the most recent land cover and use changes from Romania, chosen as an example for post-socialists transitions. The methodology was based on applying geo-spatial analyses to data on land cover and use changes and natural protected areas. The results indicate that the most prominent transitional dynamics are deforestations and abandonment of cropland, rooted in the post-socialist property restitution. Furthermore, the study identified transitional dynamics indicating the human pressure within the natural protected areas, including urbanization, development of agriculture, and deforestation. Although subject to limitations bound to the use of CORINE data, the findings are important for understanding the environmental impact of socio-economic drivers, and provide additional evidence for the fact that emerging economies tend to sacrifice the environment during the economic crises.


2014 ◽  
pp. 124-129
Author(s):  
Z. V. Karamysheva

The review contains detailed description of the «Atlas of especially protected natural areas of Saint Petersburg» published in 2013. This publication presents the results of long-term studies of 12 natural protected areas made by a large research team in the years from 2002 to 2013 (see References). The Atlas contains a large number of the historical maps, new satellite images, the original illustrations, detailed texts on the nature of protected areas, summary tables of rare species of vascular plants, fungi and vertebrates recorded in these areas. Special attention is paid to the principles of thematic large-scale mapping. The landscape maps, the vegetation maps as well as the maps of natural processes in landscapes are included. Reviewed Atlas deserves the highest praise.


2021 ◽  
pp. 102035
Author(s):  
Eduardo Cejudo ◽  
Gilberto Acosta-González ◽  
Daniela Ortega-Camacho ◽  
Katherine Ventura-Sanchez

Author(s):  
José Irving Monjarás-barrera ◽  
Mario Rocandio-rodríguez ◽  
Cristina Domínguez-castro ◽  
Francisco Reyes-zepeda ◽  
Sandra Grisell Mora-ravelo ◽  
...  

Ecological interactions between mites (predatory and phytophagous) and wild plants growing in undisturbed environments play a crucial role to understand their natural settlement, development and dispersion patterns. Pequin chili pepper, Capsicum annuum L. var. glabriusculum, is a low-cost natural resource for local communities living inside Natural Protected Areas (ANP) of Tamaulipas State in Mexico. The aims of this research work were: 1) determine the spatial distribution pattern of predatory and phytophagous mites, 2) determine the spatiotemporal association between predatory and phytophagous mites, and 3) determine the association among different mite species and some phenological stages of Pequin chili pepper. The most abundant phytophagous mites were Tetranychus merganser and Aculops lycpoersici, and the predatory species were Amblyseius similoides, Euseius mesembrinus and Metaseiulus (Metaseiulus) negundinis. Most mite species showed an aggregated distribution pattern according to the plant phenological stages. However, the distribution of mite species throughout time showed different types of aggregation. On the other hand, we found positive associations among A. lycopersici and T. merganser phytophagous mites with A. similoides, E. mesembrinus and M. (M.) negundinis predators mites. The association between plants and mite species were influenced by the phenological stages of Pequin chili pepper. This is an indication of the complexity among trophic-chain interactions that depend largely on the available resources and competition. These two factors serve as foundations for settlement, development and dispersion patterns of certain species.


PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7226 ◽  
Author(s):  
Sofia I. Muñoz-Tobar ◽  
Michael S. Caterino

Background Páramo is a tropical alpine ecosystem present in the northern Andes. Its patchy distribution imposes limits and barriers to specialist inhabitants. We aim to assess the effects of this habitat distribution on divergence across two independently flightless ground beetle lineages, in the genera Dyscolus and Dercylus. Methods One nuclear and one mitochondrial gene from 110 individuals from 10 sites across the two lineages were sequenced and analyzed using a combination of phylogenetics, population genetic analyses, and niche modeling methods. Results The two lineages show different degrees of population subdivision. Low levels of gene flow were found in Dyscolus alpinus, where one dominant haplotype is found in four out of the six populations analyzed for both molecular markers. However, complete population isolation was revealed in species of the genus Dercylus, where high levels of differentiation exist at species and population level for both genes. Maximum entropy models of species in the Dercylus lineage show overlapping distributions. Still, species distributions appear to be restricted to small areas across the Andes. Conclusion Even though both beetle lineages are flightless, the dispersal ability of each beetle lineage appears to influence the genetic diversity across fragmented páramo populations, where Dyscolus alpinus appears to be a better disperser than species in the genus Dercylus.


2012 ◽  
Vol 15 (1) ◽  
Author(s):  
José Augusto Leitão Drummond ◽  
José Luiz De Andrade Franco ◽  
Daniela De Oliveira

This is a second overview of the Brazilian conservation unit system for mid-2010. It updates author et al, 2009. It examines six dimensions of federal and state protected areas – age, numbers, types of units, absolute and average sizes, distribution by states and biomes, and degree of compliance with CBD-inspired goals. Major findings: (i) the system maintained a rapid growth rate; (ii) national parks and national forests are the most prominent units; (iii) distribution of units by region and biome remains unbalanced; (iv) state units grew remarkably over the last five years; (v) state units are biased towards sustainable use; (vi) sustainable use units grew more than fully protected units; (vii) Amazonia remains the most extensively protected biome; and (viii) quantitative goals of biome protection are closer to being reached. In 2010 Brazil held the fourth position globally in protected areas; it created the largest number of units between 2000 and 2010; it has the largest combined area of protected tropical formations. However, several regions and biomes remain under protected. 


2011 ◽  
Vol 26 (2) ◽  
pp. 9
Author(s):  
M. G. Rivera ◽  
P. Del Monte-Luna

La Investigación Evaluativa (IE) se originó en el siglo XVII, pero surgió como disciplina formal en la década de 1970. La IE consiste en la aplicación de métodos de las ciencias sociales a la evaluación de actividades humanas específicas. La IE puede ser de diseño experimental, cuasi-experimental o no-experimental y debe reunir 10 puntos básicos entre los que destacan, la planeación y evaluación. En México han existido esfuerzos por evaluar programas de desarrollo social desde 1917 y actualmente esta labor la realiza el Consejo Nacional de Evaluación de la Política Social. A nivel nacional, la evaluación del desempeño para todos los programas públicos es obligatoria. La IE es indispensable en materia de administración de recursos naturales; sin embargo, los trabajos publicados sobre este tópico son escasos. Respecto a las Áreas Marinas Protegidas (AMP), consideradas como instrumento universal de conservación de ecosistemas, la evaluación de los programas para implementarlas se lleva a cabo a nivel internacional mediante diversas metodologías. La evaluación de AMP se aplica con la finalidad de mejorar su gestión y desempeño en cuanto al cumplimiento de metas y objetivos (manejo adaptativo). En México, la evaluación de las AMP está a cargo de la Comisión Nacional de Áreas Naturales Protegidas (CONANP), pero los métodos para realizarla son poco eficientes y se carece de la capacidad técnica para hacer las evaluaciones. Para subsanar esta carencia, se requiere fortalecer la capacidad de evaluación dentro de la administración de las AMP con el apoyo de las organizaciones de la sociedad civil y el sector académico. La adecuada evaluación de las AMP en México permitirá practicar un verdadero manejo adaptativo, cumplimentar los objetivos de implementación y, sobre todo, una clara rendición de cuentas a la sociedad acerca de su eficiencia como instrumento de manejo de recursos naturales. A review on the evaluation research of protected marine areas in Mexico Evaluation Research (ER) has its origins in the XVII century but emerges as a formal discipline in 1970. ER consists on the application of techniques used in social sciences to evaluate specific human activities. The ER design may be experimental, quasi experimental or non-experimental and must contain at least 10 basic points where the planning and evaluation are particularly important. In Mexico there have been efforts to evaluate the programs of social development since 1917. Currently, this task is performed by the National Council for Social Policy Evaluation and the assessment of all social programs is compulsory. Regarding to the administration of natural resources, ER is essential; however, papers published on the subject are scarce. In order to improve the management of the Marine Protected Areas (MPA) and to assess the level on which the goals and objectives has been reached (Adaptive Management) the ER is applied to evaluate the implementation of MPAs using different methodologies. In Mexico, the National Commission of Natural Protected Areas is in charge of the evaluation of the MPAs; however, the methods used have proven little effective and lack of technical capacity. In the MPAs to do such assessments it is necessary to reinforce the evaluation capacity within the administration of MPA supported by civil organizations and academy. Proper assessment of MPAs in Mexico will allow the practice of a true adaptive management, to meet the implementation objectives and, above all, a clear accountability to the society on the effectiveness of MPA as a tool for natural resources management.


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