Colombia Forestal

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Authors: Ángela María Vásquez Correa

This brief review of the xylotheque as important reference collection aims to bring the true purpose and characteristics of these collections, its configuration and rigorous collection, recording, curation and preservation of specimens, as well as its importance cultural and scientific heritage of humanity. It has a bit of history and situation of xylotheques in the world and national scene and proposes a documented analysis of the benefits and relevance, which aims to encourage the creation of other collections and generate a change in their wrong conception and its forgotten and poor vision of these and the researchers associated with them. Analyzes its immediate and most urgent needs in Colombia, with an approach that aims to ensure and strengthen their support by related institutions, the joint development of specimens acquisition strategies closely with botanical and herbariums and conducting research to support the advancement of conservation policies of our forests, to enable identification of the species being transported and marketed, to help combat illegal logging and improve the use of this valuable material in the country.

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Authors: Juan Pablo Rodríguez, Karim Karim Senhadji-Navarro, Mauricio Andres Ruiz Ochoa

Wetlands has a vital role from an ecological and socio-economic perspective. Confronted with the idea outdated and unhealthy places and low productivity, today are considered strategic and crucial for ecosystem services provided by ecosystems, increasing dampers, special conservation sites biota. Based on a bibliographic review of the ecological status of wetlands in Colombia in the last 15 years, we analyzed the most frequent and common factors, problems and impacts presented in 29 Colombian wetlands. A prospective methodology was applied through The MICMAC® software, in order to know and prioritize the factors that are most sensitive to the transformation of the ecosystem and on which mitigation, preservation and/or conservation actions should be taken. It was found that the urban processes are a factor of high impact in the deterioration of the wetland. The potential and robustness of the MICMAC® software as a prospective analysis tool could be verified, which could be used by environmental authorities to improve decision making regarding what to do?, how to act?, and what to expect? Of the factors and problems that occur in wetlands.

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Authors: Mayra Eleonora Beltrán Pineda, Zulma Edelmira Rocha Gil, Andrea Angelica Bernal Figueroa, Luz Adriana Pita Morales

Ecological restoration initiatives that include revegetation techniques are complex processes that can be affected by many biotic and abiotic variables. Among the latter, populations of microorganisms play a fundamental role in the release of nutrients and therefore in the establishment of plant species in the areas to be restored. The study sought to evaluate the density of microbial communities related to the nutrient cycles of carbon, phosphorus and nitrogen known as functional groups present in a revegetated soil and another zone without intervention in the municipality of Villa de Leyva. Methods used in this evaluation were standard plate counts using selective culture media, also a correlation analysis were also performed between groups to evidence possible ecological interactions. In general populations of all functional groups of microorganisms are present in the two zones evaluated. Only significant differences were found for counts of phosphate solubilizing bacteria and proteolytic microorganism populations (p≤0.05). Some statistically significant correlations were found between some microbial groups that could indicate processes of cometabolism and competition among microbial populations of the soil, which favors the ecological balance of the same.

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Authors: Jairo Hernán Solorza-Bejarano

Page Header Information Online submissions Author Guidelines Indexing Citation Index Contact Article Tools Print this article Indexing metadata How to cite item Finding References Review policy Email this article Email the author Post a Comment User You are logged in as... caangulo My Journals My Profile Log Out Language Select LanguageSubmit About The Author Jairo Hernán Solorza-Bejarano orcid Jardín Botánico de Bogotá José Celestino Mutis Colombia Font Size Make font size smallerMake font size defaultMake font size larger Open Journal Systems Journal Content Search Search Scope Search Browse By Issue By Author By Title Other Journals Categories Information For Readers For Authors For Librarians HOMEABOUTUSER HOMECATEGORIESSEARCHCURRENTARCHIVES Home > Vol 20, No 2 (2017) > Solorza-Bejarano Regeneration pattern of the seedling of Genista monspessulana (L.) L.A.S. Johnson, in two ecological restoration scenarios Jairo Hernán Solorza-Bejarano Abstract In order to improve the control programs of the invasive species Genista monspessulana, in two scenarios of ecological restoration with different light availability in Bogotá, we analyzed the seed bank regeneration pattern and the initial development of the individuals. For that, coverage, abundance, height, epigeal and hypogeal length, number of leaflets, leaf area, root diameter, number of root branches, presence of nodules and biomass epigeal and hypogeal of the seedlings were studied. Seedling development as well as seedbank regeneration showed differences in the ecological scenarios. In the area under tree canopy, individuals presented slow growth, limited by litter cover and low light availability, while in the open area with greater light incidence, the individuals showed a rapid development of the leaves and roots, in addition of the mutualistic association with microorganisms that allows them greater absorption and fixation of nitrogen.

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Authors: Orlando Riaño Melo, Iván Lizarazo

Estimating the volume of wood from trees is an expensive, time-consuming and error-prone task. Traditional methods use mathematical models that need to be matched to existing species and specific areas using a case by case approach. Such methods have high operating and environmental cost, as several trees in the plantation are cut down. This article presents an alternative model to quantify the volume of a tree, which uses a single polynomial, which requires not felling the tree, which is relatively quick and inexpensive with good accuracy, and can be extended to estimate the trade volume of the plantation. To this end, the proposed method is described mathematically and its results compared with those obtained for five ideal methods described by FAO (1980). Results show that the polynomial method has a maximum relative error that does not exceed 1.6% in any case and allows calculating tree’s diameter at a given height and height for a given diameter.

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Authors: Manuel Eduardo Lequerica Támara, Maurico Bernal, Pablo Roberto Stevenson Díaz

Secondary growth forests have increased their extension in the last decades, and have been suggested as potential conservation reservoirs. The objective of this study was to evaluate diversity and vegetation composition in pastures and forests at (Granada, Cundinamarca, Colombia) to assess if successional processes show evidence of directionality, we placed six plots by 0.1-ha in the forest edges, one towards the forest and other to the abandoned paddocks in three locations. We determined the average vegetation structure, diversity, and floristic composition for each plot. We found that diversity is significantly higher in forest plots than in paddock plots (at early succession stage) in high Andean cloud ecosystems. The successional stage of each one of the study sites was characterized using non-metric multidimensional scaling. This analysis shows that vegetation tends to group in function of age groups more that it does by geographic location of the plots, suggesting succession is a directional process. Seedling recruitment was not significantly different between forest edge and forest interior. An inverse relation was found between floristic and geographic distances, reflecting the fact that matrix discontinuity is a limiting factor for seed dispersal, thus it is a barrier for high Andean cloud forest succession.

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Authors: Nathalia María Forero-Cabrera, Jesús Hernán Camacho-Tamayo, Leonardo Ramírez-López, Yolanda Rubiano Sanabria

Techniques such as near infrared spectroscopy (NIR) can be used to identify classes and properties of soils with good precision. The aim of this study was to calibrate models to predict the content of clay, silt and sand of a Typic Hapludox by NIR spectroscopy. The study was carried out in the Carimagua Experimental Station located in the municipality of Puerto Gaitán, Meta, Colombia. A grid design was used, 1200 samples were collected in an area of 5100 ha. The development of the models have made by partial least squares regression. A low representatively models were obtained for sand and silt contents, with values of R2 (0.41 and 0.34, respectively).The clay model content showed a high R2 (0.76). For the clay was possible the development of similar digital maps and digital spectrum maps . The results for the clay content indicate that laboratory analysis can be substituted, in large part by spectral models. In the case of sand and silt, in the future, it would be convenient to improve the model for substituting the laboratory analysis for this class of soil.

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Authors: Laura Isabel Mesa Castellanos, Angélica María Toro Buitrago, Carolina Isaza Aranguren

We present information about the spear leaves harvest, fiber processing and trade of Mauritia flexuosa L.f. for the handicrafts production by the Sikuani people in Wacoyo indigenous Village, in Puerto Gaitán, Meta, Colombia. We made a semi-structured interviews and workshops with harvesters, artisans and traders. During these sessions we inquired about their harvesting techniques, characteristics of harvestable individuals, distribution area of the palms, market aspects and other uses of the species. Mauritia flexuosa, locally known as moriche, is one of the economic livelihoods for the artisans who inhabit the Wacoyo reservation. The harvest of spear leaves is carried out in juvenile and subadult palms. The fibers are extracted from the spear leaves to manufacture handicrafts like bags, baskets, hats and hammocks. Artisans sell the products to tourists visiting the reservation, and intermediary sellers who commercialize them in the municipality center of Puerto Gaitán and Puerto Lopez, Meta. The use of M. flexuosa has the potential to become a sustainable activity, since the leaf harvest does not involve the death of the individuals.