Licenciatura en Biología

URI permanente para esta colecciónhttp://hdl.handle.net/11349/38

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Tardígrados (phylum Tardigrada) asociados a briófitos de agroecosistemas freseros en Sibaté, Cundinamarca
(Universidad Distrital Francisco José de Caldas) Pérez Montaña, Paula Angélica; García García, Alexander; García García, Alexander [0000-0001-9905-003X]
Tardigrades are microscopic invertebrates known to withstand extreme conditions. Their sensitivity to environmental pollutants in urban areas that affect their density and diversity has been documented; however, in environments such as rural areas and modified ecosystems, studies are still scarce. Therefore, the aim of this study was to study tardigrades associated with bryophytes in strawberry agroecosystems in Sibaté, Cundinamarca. Forty-five bryophyte samples were taken from nine strawberry farms located in paramo and Andean forest habitats and in the area of influence of the Muña dam in Sibaté, Cundinamarca, Colombia. The samples were preserved in paper bags, subsequently analyzed under the stereoscope at the "Kumangui" research group of the Universidad Distrital and the specimens were identified under a phase contrast microscope at the "MIKU" research group ofthe Universidad del Magdalena. A PCА, NMDS and Bray Curtis analysis was performed. A total of 11 genera were found, 3 new records for Colombia, the genus with the highest abundance was Haplohexapodibius, the habitat with the highest diversity and abundance was the paramo zone. The paramo habitat may favor the presence of tardigrades due to the environmental conditions it presents, and altitude plays an important role in the distribution of tardigrades. It can be inferred that the transition zones may be of importance, so they can facilitate the presence of tardigrades and a high diversity.
Himenópteros asociados a diferentes coberturas vegetales presentes en la vereda Santa Ana, Ubaque - Cundinamarca
(Universidad Distrital Francisco José de Caldas) Pérez Posada, Jeison Julián; García García , Alexander; García García ,Alexander [0000-0001-9905-003X]
The order Hymenoptera that includes wasps, bees, bumblebees, ants and vespiform insects, is the second most diverse group of hexapods worldwide, this allows us to find them in most ecosystems generating interactions that are fundamental within them, from these interactions are generated ecosystem services such as pollination, soil bioturbation, decomposition and biological control. In the present research, the diversity of hymenoptera associated with Ubaque - Cundinamarca is determined; four plant coverages were identified as: Maizal, Pastizal, Policultivo and Remanente de Bosque, all of which are found in Santa Ana; a total of 48 samples were taken for all coverage, with a total of 120 hours of active work. Hill numbers were used to determine alpha diversity and for analysis of beta diversity, the Bray Curtis index was used, a total of 3503 individuals were obtained, where the polyculture is the most abundant and the grassland has the fewest specimens; The Braconidae and Ichneumonidae are the most abundant families, while Scoliidae and Siricidae are the families with only one individual collected.
Modelamiento predictivo de afectaciones ecosistémicas en la Esperanza (Villanueva-Casanare) con un enfoque geo-espacial integrado
(Universidad Distrital Francisco José de Caldas) Mora Cruz, Efraín Camilo; Giraldo Quintero, Gustavo
Predictive modeling of ecosystem impacts on private lands using geospatial data is a crucial tool for wildlife conservation and natural resource management. This approach integrates advanced analyses of satellite imagery, climatic data, and geographic models to anticipate land-cover changes and their effects on biodiversity.Land-cover change was assessed using Sentinel-2 and Landsat imagery, focusing on La Esperanza in Villanueva, Casanare, from 2018 to the present. The analysis revealed relative stability in both forested and pasture areas, with temporary variations caused by the dynamics of the Upía River, which periodically altered land cover.A biological survey of the property recorded 35 animal species and 19 plant families, providing the foundation for modeling wildlife corridors. Ten of the 35 animal species were selected for connectivity modeling at two spatial scales: property-level (3,000 meters between points) and landscape-level (10,000 meters between points). Future scenarios were also modeled under a complete land-cover change, considering both forest and pasture replacement. The results consistently showed significant disconnection at the landscape scale, as forest patches lack continuity. The only nearby continuous forest is associated with an oil palm plantation adjacent to the property. The species most affected by this lack of connectivity are primates, particularly Alouatta seniculus and Saimiri albigena, which face severe challenges in their movements—except within the property under current conditions and in the simulated forest-cover scenario. Other species show greater adaptability across different environments; however, the forest patch in the southern and southwestern sectors of the property stands out as a key wildlife passage and as a natural buffer against disturbances, such as those generated by the Upía River.Finally, the scarcity of fauna studies in agro-landscapes in Casanare, combined with the absence of formal biodiversity protection measures (such as national parks or reserves) and the expansion of large-scale crops such as rice, oil palm, and maize, represents a major threat to the long-term conservation of biodiversity in the region.
Evaluación del comportamiento de un individuo de Leopardus pardinoides durante su proceso de rehabilitación en la Unidad de Rescate y Rehabilitación de Animales Silvestres (URRAS)
(Universidad Distrital Francisco José de Caldas) Medina Martínez, Daniela; Mahecha Jiménez , Oscar Javier; Mahecha Jiménez ,Oscar Javier [0000-0002-8682-0020]
This study assessed the behavior of a Leopardus pardinoides individual during rehabilitation at the Unidad de Rescate y Rehabilitación de Animales Silvestres (URRAS),Universidad Nacional of Colombia, aiming to promote behaviors that support reintegration into the wild. An ethogram was developed from camera trap observations, and structural, sensory, occupational, and feeding enrichments were implemented to evaluate their effects on the activity budget. Comparisons between pre- and post-enrichment phases revealed a significant increase in natural behaviors (locomotion, exploration, foraging) and a reduction in stereotypic behaviors. Statistical analyses confirmed significant differences in key welfare-related behaviors. These findings highlight environmental enrichment as an effective tool to stimulate natural behaviors in wild animals under human care. For L. pardinoides, a recently recognized species with broad distribution in Colombia, the results are particularly relevant for addressing conservation challenges such as habitat fragmentation and road mortality.
Catálogo palinológico de especies de angiospermas presentes en zonas aledañas a cultivos de fresa en Sibaté-Cundinamarca
(Universidad Distrital Francisco José de Caldas) Gómez Cuadrado, Heidy Tatiana; García Romero, Miguel Ángel; Tijaro Orejuela, Mery Helen; Tijaro Orejuela, Mery Helen [0000-0002-2519-066X]
This project aims to characterize the morphological data of pollen collected in areas near strawberry plantations in Sibaté, Cundinamarca. These samples aim to develop a Morphological Pollen Catalog that will improve our understanding of pollen biology. This project addresses the need to address challenges related to the lack of information regarding pollen diversity. However, this lack of palynological information prevents a complete understanding of pollen diversity and characteristics. Therefore, the creation of a morphological catalog will provide a database that facilitates the study and identification of pollen, in addition to contributing to the advancement of scientific knowledge in the field of palynology.
Briófitos terrestres de la Reserva Natural Biomevak Vianí – Cundinamarca
(Universidad Distrital Francisco José de Caldas) Muñoz Rodríguez , Dilan Andrés; Pérez León, Duván Felilpe; Tijaro Orejuela, Mery Helen; Tijaro Orejuela, Mery Helen [0000-0002-2519-066X]
The research entitled “Terrestrial bryophytes in the BIOMEVAK nature reserve. Vianí- Cundinamarca” aimed to contribute to knowledge about the species of terrestrial bryophytes present in a secondary forest in that reserve. To this end, the samples were herbalization, where they were separated, cleaned, dried, and subsequently identified. Predominant families such as Plagiochilaceae and Lejeuneaceae were observed, which are prevalent in these environments and seem to adapt well to secondary forests. In addition, a database was created to organize the information, facilitating its access and analysis. The study highlighted the fundamental role of bryophytes in the ecosystem, as they contribute to maintaining humidity, stabilizing the soil, preventing erosion, promoting humus accumulation, and providing habitats for other organisms, highlighting their importance in the conservation and recovery of the secondary forest. The need to expand taxonomic studies in Colombia to better understand these species and their ecological function was also emphasized. The research concluded that continuing inventories in more areas and disseminating this knowledge is essential for the protection of the ecosystem and its biodiversity, considering that, according to the IUCN (2025), some of the species found are at possible risk.
Prospección molecular de ADN antiguo en muestras arqueológicas óseas y dentales de origen humano
(Universidad Distrital Francisco José de Caldas) Aristizabal Franco, Edwin Albeiro; Rodríguez Saza, Freddy; Rodríguez Saza, Freddy [0000-0001-9709-4258]; Aristizabal Franco, Edwin Albeiro [0009-0005-3253-831X]
The recovery of biomolecules from ancient biological samples is almost impossible; however, different investigations have aimed to make efforts to define methodologies at morphological, histological and molecular scales for the optimal analysis of this type of samples, especially in relation to the extraction of DNAa, although it is highly fragmented and in low concentrations (Haynes & Searle, 2002; Pilli et al., 2013; González Espino, 2023; Corach & Sala, 2001; Rodríguez Saza, 2019). Therefore, the present project aims to carry out molecular prospecting for DNAa in bone and dental samples of human origin obtained from archaeological contexts, analyzing and detailing their level of biochemical preservation through various tests and techniques. Finally, the mitochondrial haplogroup belonging to the studied individual, through locus 16132-16217 of the hypervariable region 1 (HVR1).
Propagación vegetativa de dos especies carnívoras del género Drosera: análisis de métodos y eficiencia
(Universidad Distrital Francisco José de Caldas) Montoya Flórez, Estefanny; Giraldo Quintero, Gustavo; Giraldo Quintero Gustavo [0000-0003-3573-4154]
This research project focuses on identifying efficient methods of vegetative propagation for Drosera nidiformis and Drosera capensis, species maintained in the living collections of the José Celestino Mutis Botanical Garden. This genus of carnivorous plants is of great interest due to its biological uniqueness and ability to attract and digest insects. However, many carnivorous plant species are threatened by habitat loss, climate change, and overharvesting. Therefore, this project is essential for optimizing propagation and cultivation methods at the Bogotá Botanical Garden, enabling the institution to preserve and expand its collections while promoting conservation and knowledge of these fascinating plants. The study was carried out through controlled experiments, monitoring factors such as survival rate, development time, and the quality of propagated plants. Results showed that Treatment 3 (distilled water + aloe gel) achieved the best performance in terms of shoot production and leaf number. The most effective cutting type for propagating D. capensis was the leaf cutting, whereas for D. nidiformis the root cutting proved to be the most effective.
Bosque bajo cristal: Una descripción fenológica de patrones de floración en el Tropicario del Jardín Botánico de Bogotá
(Universidad Distrital Francisco José de Caldas) Martínez Bejarano, Juana Valentina; Giraldo Quintero, Gustavo; Giraldo Quintero Gustavo [0000-0003-3573-4154]
The Tropicario at Bogotá Botanical Garden hosts representative species from Tropical Rainforest (ShT) and Tropical Dry Forest (BsT) ecosystems under controlled conditions. This six-month study analyzed 144 individuals from 104 species to describe their phenological patterns. High synchrony between floral buds and blooming was observed, with a low incidence of fruiting, possibly due to the absence of specific pollinators. Environmental conditions and management practices influenced the recorded patterns. This work provides a foundation for conservation, sustainable management, and environmental education in a key space for tropical biodiversity preservation.
Abordaje de la fauna presente en la Ciénaga de Mallorquín dirigido a estudiantes de aceleración en la Institución Educativa Tecnica Francisco de Paula Santander en Galapa,Atlántico
(Universidad Distrital Francisco José de Caldas) Escobar Ropero, Sofía; Giraldo Quintero, Gustavo
This work is carried out within the framework of the PTA-FI 2025 Tutoring for Learning programme of the Ministry of National Education, where, taking into account the importance of environmental education in rural areas, is proposed as an internship the approach of the fauna present in the Ciénaga de Mallorquín with students belonging to the acceleration degree at the Francisco de Paula Santander Technical Educational Institution in Galapa, Atlantic. With the objective that the students recognize the fauna present in the Ciénaga de Mallorquín, by developing an educational proposal to make known the fauna of this place, starting from the development of several interventions in which a series of educational activities are carried out together with the students, taking into account four basic phases (diagnostic phase, recognition phase, awareness phase and socialisation phase) to analyze whether the students really know about the fauna of this ecosystem so important for the Colombian Caribbean and their perspective on the vulnerability of animals that inhabit the Mallorquín Swamp. For the analysis of this work a qualitative methodology is used. The instruments used were diagnostic guide, virtual roulette, round tables, interactive games and posters; thus, starting from the content analysis of each of the activities carried out, know if the approach of the fauna present in the Ciénaga de Mallorquín was successful and the students recognize the animals that inhabit this ecosystem correctly. Finally, it is concluded that the students responded positively to the interventions regarding the approach to the fauna present in the Ciénaga de Mallorquín, recognizing the ecological importance of this ecosystem and the animals that belong to that space.
Propagación de semillas para el enriquecimiento del Tropicario del Jardín Botánico de Bogotá: estudio del desarrollo de Cedrela odorata L. y de la germinación de otras especies
(Universidad Distrital Francisco José de Caldas) González González, María Paula; Giraldo Quintero, Gustavo; Giraldo Quintero,Gustavo [0000-0003-3573-4154]
To strengthen the living collection of the Bogotá Botanical Garden, research was carried out in the Tropicario focusing on the sexual and vegetative propagation of tropical species, with special attention to Cedrela odorata L. This species achieved 57.5% germination and 99% survival, with no significant differences among treatments or substrates, although its initial growth was limited by light availability. During fertilization, no significant effects were found for Osmocote® or vermicompost, the latter showing the lowest performance. In complementary species, germination was generally lower than reported in the literature, except for Chamaedorea tepejilote, Medinilla speciosa, and Hibiscus spathulatus, which showed good adaptability. Vegetative propagation by cuttings was unsuccessful, while air layering in Aristolochia grandiflora reached 100% success. These findings provide valuable technical insights to optimize propagation and ex situ conservation strategies for tropical species in high mountain environments.
Ecos nocturnos: Caracterización vocal de dos grupos sociales de Aotus griseimembra en fragmentos de bosque de San Juan del Carare, Cimitarra, Santander, Colombia
(Universidad Distrital Francisco José de Caldas) Chacón Pardo, Fredy Alexander; Piñeros Molano, José Santiago; Giraldo Quintero, Gustavo
This study characterizes the vocal repertoire of two wild social groups of Aotus griseimembra from the Middle Magdalena region of Colombia. Over a four-month period, bioacoustic monitoring was conducted, resulting in 4,191 vocalizations suitable for acoustic analysis. Eleven vocalization types associated with specific behaviors were identified, two of which are newly described for the genus (Gimoteo and Ladrido). Statistical analyses indicated that all acoustic parameters were significant for call classification, and discriminant analyses revealed that peak frequency and note duration contributed the most to their differentiation. Comparisons between social groups showed few acoustic differences among vocalizations; only Barks, Owls, and Screeches exhibited apparent variation, likely influenced by individual traits or group size. At the interspecific level, significant differences were found across all vocalizations when compared to Aotus lemurinus, possibly reflecting ecological factors, acoustic niche divergence, and habitat structural characteristics.
Análisis paleohistológico de muestras arqueológicas óseas de origen animal y humano
(Universidad Distrital Francisco José de Caldas) Cárdenas Otavo, Hellen Alexandra
Paleohistology has significantly transformed the study of ancient biological remains, providing new perspectives on tissue preservation and taphonomic processes. This discipline integrates multiple techniques to reveal information about life patterns, diseases, and post-mortem modifications in past populations, allowing for overcoming traditional limitations and accessing previously inaccessible microstructural data. This methodological development has transitioned from traditional approaches such as optical microscopy, which presents limitations in variability and scalability, toward advanced high- resolution technologies that have considerably expanded analytical possibilities. Scanning electron microscopy (SEM) allows for visualizing detailed microstructural changes and evaluating tissue preservation with greater precision, while specialized histochemical techniques such as Feulgen staining are particularly effective for characterizing ancient and mineralized samples. Likewise, automated approaches through digital image processing have revolutionized the field by introducing new levels of precision and efficiency. Computational models demonstrate high precision in osteocyte segmentation, improving reproducibility and efficiency in quantitative analysis. These advances not only facilitate the estimation of age at the time of death, but also deepen the understanding of complex processes such as bone remodeling and cellular viability. Nevertheless, significant challenges persist that include sample degradation, taphonomic and diagenetic factors, limitations in technological access, and effects of thermal alteration, aspects that condition the quality of the results obtained. In this regard, continuous optimization of preparation and analysis protocols is essential for the precise characterization of ancient biological materials and the sustained advancement of this discipline.
Un reencuentro con el pasado. Análisis del ADNmt en muestras óseas del sitio Arqueológico Bonaca (municipio de Soacha)
(Universidad Distrital Francisco José de Caldas) Peñata Cubides, Naiver Steven; Rodríguez Saza, Freddy; Rodríguez Saza, Freddy [0000-0001-9709-4258]
Genetic studies in the Bogotá Savanna (SB) have debated between models of continuity (MCP) and population discontinuity (MDP) during the Holocene. This study analyzed mitochondrial DNA (mtDNA) from skeletal remains at the Bonaca archaeological site to evaluate these models. Four samples were processed using ancient DNA protocols, nextgeneration sequencing, and strict contamination controls. The haplotypes obtained were compared with 35 sequences reported for the Early, Middle, Early Late, and Late Late Holocene periods using haplotype diversity (Hd), nucleotide diversity (π), a haplotype network, and phylogeny analysis. The founder haplogroups A2 (BON3, BON4) and B2 (BON1, BON2) were identified. Nucleotide diversity showed a progressive decrease from the Middle Holocene to the Late Holocene, while genetic distances between periods were low. Shared haplotypes were detected between the Middle and Late Holocene, evidencing persistent lineages. These results support the population continuity model (PCM), ruling out significant replacements during the Middle Holocene in the Bogotá Savanna.
Hongos en la finca la franja: explorando la diversidad fúngica en vianí, cundinamarca
(Universidad Distrital Francisco José de Caldas) Chavarro Moncada, Claudia Catalina; Medina Mora, Dayanna Gabriela; Tijaro Orejuela, Mery Helen; Tijaro Orejuela,Mery Helen [0000-0002-2519-066X]
The Final Internship Report entitled “Fungi at La Franja Farm: Exploring Fungal Diversity in Vianí, Cundinamarca” was conducted at La Franja Farm, Vianicito village, Vianí, Cundinamarca, a site recognized for its high biological diversity. The general objective was to characterize fungi present in permanent plots and transects within the lower montane forest of the farm. During six months of monthly sampling, 20 plots and two transects were surveyed, documenting the morphological and ecological traits of macrofungi through spore prints, longitudinal sections, and systematic data recording. Results showed a strong dependence of macrofungi on environmental factors, particularly humidity and rainfall, with plots 5 and transect 4 yielding the greatest abundance and diversity, dominated by pileate fungi. A key contribution of this study was the adaptation of the plastination protocol using epoxy resin under resource-limited conditions, eliminating the need for specialized equipment such as vacuum pumps or chambers. Experimental trials led to crucial adjustments, including partial acetone dehydration to protect delicate structures, a 1:1 epoxy-to-catalyst ratio for improved color preservation, and limiting polymer layers to avoid rigidity. This adaptation demonstrates that plastination can be an accessible, low-cost, and effective technique for preserving macrofungi, with significant potential for educational and museographic purposes in contexts lacking advanced laboratory infrastructure.
Explorando la distribución geográfica y coberturas vegetales Utilizadas por el águila crestada Morphnus guianensis, especie amenazada, con el fin de promover planes de conservación
(Universidad Distrital Francisco Jose de Caldas) Niño Sarmiento, Laura; Cordoba Cordoba , Sergio
The great crested eagle, Morphnus guianensis, is a little-known raptor of the Neotropics and is considered near-threatened. It inhabits dense jungles from Mexico to Brazil, including the Amazon basin and Atlantic forests. It is a formidable size, with a striking crest and varying morphs between individuals, with females being larger than males. Its reproduction is slow, with few young and long-term care, making it vulnerable to changes in its habitat. It feeds primarily on mammals, birds, and reptiles, hunting from high perches. It prefers tropical rainforests, gallery forests, and areas with dense tree cover, where it finds shelter and food. However, deforestation, forest fragmentation, and hunting have reduced its population. Predictive models show that between 2014 and 2025, the suitability area has decreased considerably, mostly coinciding with areas where tree cover has decreased. Although some regions, such as the Amazon and the Isthmus of Panama, maintain good conditions, there are also small areas where suitability has increased, perhaps leading to improved local protection methods. Changes in vegetation cover show that dense forest remains the primary habitat; however, human pressure has brought areas of grassland and cultivated land to previously suitable areas, transforming their habitat and subjecting them to new pressures. Habitat loss is most severe in Central America and parts of the southern Amazon, while areas of persistence are concentrated in regions with low fragmentation and high ecological resilience. The study suggests that, to conserve the species, it is key to protect areas with high ecological suitability, many of which are not under legal protection. Furthermore, it recommends integrating tools such as niche modeling and geographic information systems to guide management plans. It also highlights the importance of working with communities, since conservation is often more feasible with their support and engagement. In short, the crested eagle requires large areas of well-preserved forest, and its future will depend on the ability to maintain and restore these ecosystems before human pressures further reduce them.
Explorando la distribución geográfica y coberturas vegetales utilizadas por el Águila crestada Morphnus guianensis, especie amenazada, con el Fin de promover planes de conservación
(Universidad Distrital Francisco José de Caldas) Niño Sarmiento, Laura Catalina; Cordoba Cordoba , Sergio
The great crested eagle, Morphnus guianensis, is a little-known raptor of the Neotropics and is considered near-threatened. It inhabits dense jungles from Mexico to Brazil, including the Amazon basin and Atlantic forests. It is a formidable size, with a striking crest and varying morphs between individuals, with females being larger than males. Its reproduction is slow, with few young and long-term care, making it vulnerable to changes in its habitat. It feeds primarily on mammals, birds, and reptiles, hunting from high perches. It prefers tropical rainforests, gallery forests, and areas with dense tree cover, where it finds shelter and food. However, deforestation, forest fragmentation, and hunting have reduced its population. Predictive models show that between 2014 and 2025, the suitability area has decreased considerably, mostly coinciding with areas where tree cover has decreased. Although some regions, such as the Amazon and the Isthmus of Panama, maintain good conditions, there are also small areas where suitability has increased, perhaps leading to improved local protection methods. Changes in vegetation cover show that dense forest remains the primary habitat; however, human pressure has brought areas of grassland and cultivated land to previously suitable areas, transforming their habitat and subjecting them to new pressures. Habitat loss is most severe in Central America and parts of the southern Amazon, while areas of persistence are concentrated in regions with low fragmentation and high ecological resilience. The study suggests that, to conserve the species, it is key to protect areas with high ecological suitability, many of which are not under legal protection. Furthermore, it recommends integrating tools such as niche modeling and geographic information systems to guide management plans. It also highlights the importance of working with communities, since conservation is often more feasible with their support and engagement. In short, the crested eagle requires large areas of well-preserved forest, and its future will depend on the ability to maintain and restore these ecosystems before human pressures further reduce them.
Cuestionando mandatos socioculturales sobre la sexualidad: propuesta para la formación de una ciudadanía crítica desde la educación en biología
(Universidad Distrital Francisco José de Caldas) Velandia Silva, Laura Nicol; Sarmiento Bustos, María Camila; Villarreal Gil, Elda Yanneth
This is a research proposal that began by questioning sexuality beyond its biological aspect, as a social identity that is regulated and conditioned by socio-cultural mandates. Considering that biology education aims to help people understand the world in a comprehensive way, refuting beliefs associated with the misuse of science and understanding its political implications, we opted for sexuality education that encompassed psychological, biological, social, political, economic, cultural, and religious aspects. The proposed activities were carried out in accordance with the needs and questions of the students, responding to a feminist participatory action research (FAPR) methodology. They addressed topics such as sexual and reproductive rights, the onset of sexual activity, contraceptives, menstruation and laws, among others. The results showed that addressing issues such as sexuality directly and from a gender perspective creates spaces where cognitive questioning skills increase, aspects of comprehensive and critical citizenship become more noticeable, and ways of fighting against patterns that have historically violated groups on the basis of sex and gender are developed.
Análisis de la diversidad y ensamblaje de medianos y grandes mamíferos en el piedemonte amazónico del fin del mundo (Mocoa-Putumayo)
(Universidad Distrital Francisco José de Caldas) Garay Leguizamón , Jhon Anderson; Parra Mendoza, Yeimi Natalia; Bolaños Rodríguez , Abelardo; Bolaños Rodríguez, Abelardo [0000-0002-2761-1712]
The Amazonian foothills of the Putumayo department represent one of the areas with the highest biodiversity in Colombia, forming a mosaic of tropical humid forests that function as a biological corridor between the Andes and the Amazon. This region, considered part of a global biodiversity hotspot, harbors an extraordinary wealth of species, many of which are endemic or threatened, and performs essential ecological functions. Despite its ecological and social importance, the Amazonian foothills face increasing pressures from human activities. The lack of knowledge regarding the composition, abundance, and ecological roles of medium and large mammals limits informed decision-making for their management and conservation. In this context, the present study aims to characterize the structure and composition of the assemblage of medium and large mammals along the “End of the World” tourist trail, located in Mocoa, Putumayo. Biodiversity indices and field sampling methodologies were employed to assess the current status of the mammalian fauna, identify potential impacts, and propose guidelines for the conservation of these vertebrates in a territory of high biological value and increasing ecotourism use. A total of sixteen species were recorded in the study area, with significant differences found between conserved zones and those subject to high levels of human influence. Finally, the study’s findings contributed to the design of a scientific outreach tool in the form of a catalog of medium and large mammals, which promotes knowledge appropriation and conservation planning.
Diversidad y preferencias de hábitat por parte de la avifauna en áreas antropizadas urbanas como antecedente para evaluar los efectos de la futura construcción de la Avenida Longitudinal Occidental Sur (ALO-Sur)
(Universidad Distrital Francisco José de Caldas) Guerrero Pérez, David Alejandro; Córdoba Córdoba , Sergio; Córdoba Córdoba Sergio [0000-0003-0615-6551]
This study aims to characterize the avifauna of a peri-urban area in the El Tintal neighborhood of Bogotá and to provide baseline information relevant to the projected construction of a highway that would cross the city from south to north along its western edge, parallel to the Bogotá River. Such infrastructure poses a threat to ecological connectivity and habitat quality in the surrounding areas. The main objective was to assess the diversity and habitat preferences of bird species within a small section of the area to be impacted, as well as its adjacent recovering zones. Bird monitoring was conducted between July 2024 and February 2025 through visual and auditory identification at fixed points and transects designed to represent the area’s habitat types. The Manly selection index was employed to evaluate habitat preference. A total of 72 bird species were recorded, including a notable presence of raptors, indicative of a healthy ecosystem. Additionally, key habitat areas for local avifauna were identified. The findings underscore the ecological importance of these peri-urban green spaces, which play a critical role in sustaining the ecological functions and biodiversity of urban environments

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