https://hdl.handle.net/20.500.12219/1281 2026-04-25T23:40:26Z 2026-04-25T23:40:26Z https://hdl.handle.net/20.500.12219/5736 2025-12-09T15:34:30Z 2016-01-01T00:00:00Z

Tree monocultures in biodiversity hotspots : impact of pine plantations on the mammal assemblages of the Atlantic Forest and the Southern Cone Mesopotamian Savanna ecoregions of South America Large scale plantations of exotic trees (mostly Pinus and Eucalyptus) are replacing vast areas of native environments in South America, with still poorly known consequences on local communities. This is particularly worrisome in endangered ecoregions of high biodiversity that contain endemic and endangered species. This study was aimed at assessing the effects of pine plantations on the mammal assemblages of NE Argentina, in areas where plantations are rapidly increasing. We evaluated the effects of the native forest replacement by non-native pine (Pinus sp.) plantations on the composition of the assemblages of terrestrial mammals in two forest productive landscapes. In the first study area, of approximately 5,000 km2 and located in the endangered Atlantic Forest of N Misiones province, we deployed 184 camera-trap stations in three different "treatments": 53 in continuous forest, 69 in forest fragments and 62 in tree plantations. In the second, of approximately 20,000 km2 and located in the vulnerable Southern Cone Mesopotamian Savanna ecoregion of NE Corrientes province and S Misiones, we deployed 234 camera-trap stations: 35 in grasslands without cattle, 54 in grasslands with cattle, 35 in forests without cattle, 19 in forests with cattle, 54 in pine plantations without cattle and 37 in plantations with cattle. We used NMDS and PERMANOVA to assess the effect of the treatment, the structural complexity of the vegetation, the presence of cattle (in Corrientes) and several landscape variables (cost-distance to the continuous forest in Misiones, the percentage of different environments within different radiuses, and the cost of human access as a proxy for hunting pressure) on species composition. We recorded 34 species (4735 records) in Misiones and the same number of species (4460 records) in Corrientes. Mean recording rate (a proxy of relative abundance or activity) and richness were much lower in pine plantations than in natural environments in both landscapes (e.g., mean mammal richness per station in Misiones was (X±SD) 7.54±2.65 species in continuous forest, 5.97±2.46 in fragments and 3.39±1.90 in plantations). In both landscapes mammal composition was affected by treatment, the proportion of native environments in the landscape, and human access. In Misiones, the distance to the continuous forest also had a strong effect on the compositions of the assemblage. Different management practices (e.g. pruning and thinning), the presence-absence of cattle and landscape features can partially mitigate the negative effect of tree plantations on mammal assemblages. Large areas of native environments that function as population sources and forest fragments immersed in the matrix of plantations (in Misiones) are necessary to preserve the original native mammal assemblage at the landscape level. Promoting connectivity of the native environments and improving hunting controls will also mitigate negative impacts.showless. Fil: Iezzi, María Eugenia. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: De Angelo, Carlos. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Varela, Diego M. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Cruz, Paula. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Cirignoli, Sebastián. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Di Bitetti, Mario S. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Iezzi, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina.; Fil: De Angelo, Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina.; Fil: Varela, Diego Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina.; Fil: Cruz, Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina.; Fil: Di Bitetti, Mario S. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina.

2016-01-01T00:00:00Z https://hdl.handle.net/20.500.12219/5728 2025-07-10T13:12:53Z 2018-12-13T00:00:00Z

Populations and assemblages living on the edge : dung beetles responses to forests-pasture ecotones Edge effects alter insect biodiversity in several ways. However, we still have a limited understanding on simultaneous responses of ecological populations and assemblages to ecotones, especially in human modified landscapes. We analyze edge effects on dung beetle populations and assemblages between livestock pastures and native temperate forests (Juniperus and pine-oak forests (POFs)) to describe how species abundances and assemblage parameters respond to edge effects through gradients in forest-pasture ecotones. In Juniperus forest 13 species avoided the ecotones: six species showed greater abundance in forest interior and seven in pasturelands, while the other two species had a neutral response to the edge. In a different way, in POF we found five species avoiding the edge (four with greater abundance in pastures and only one in forest), two species had a neutral response, and two showed a unimodal pattern of abundance near to the edge. At the assemblage level edge effects are masked, as species richness, diversity, functional richness, functional evenness, and compositional incidence dissimilarity did not vary along forest-pasture ecotones. However, total abundance and functional divergence showed higher values in pastures in one of the two sampling localities. Also, assemblage similarity based on species’ abundance showed a peak near to the edge in POF. We propose that conservation efforts in human-managed landscapes should focus on mitigating current and delayed edge effects. Ecotone management will be crucial in livestock dominated landscapes to conserve regional biodiversity and the environmental services carried out by dung beetles. Fil: Martínez Falcón, Ana Paola. Universidad Autónoma del Estado de Hidalgo. Instituto de Ciencias Básicas e Ingenierías. Centro de Investigaciones Biológicas; México.; Fil: Ortega Martínez, Ilse J. Universidad Autónoma del Estado de Hidalgo. Instituto de Ciencias Básicas e Ingeniería. Centro de Investigaciones Biológicas; México.; Fil: Zurita, Gustavo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste; Argentina.; Fil: Zurita, Gustavo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical. Nodo Puerto Iguazú; Argentina.; Fil: Zurita, Gustavo Andrés. Universidad Nacional de Misiones. Instituto de Biología Subtropical. Nodo Puerto Iguazú; Argentina.; Fil: Moreno Ortega, Claudia Elizabeth. Universidad Autónoma del Estado de Hidalgo. Instituto de Ciencias Básicas e Ingeniería. Centro de Investigaciones Biológicas; México.

2018-12-13T00:00:00Z https://hdl.handle.net/20.500.12219/5071 2024-05-15T14:41:18Z 2022-11-23T00:00:00Z

El rol de la biodiversidad en sistemas productivos : percepción de los futuros profesionales del sector; The role of biodiversity in production systems : perception of future professionals in the sector Misiones (Argentina) conserva una de las regiones con mayor biodiversidad a escala mundial. Actualmente la expansión de las actividades foresto-agropecuarias podría afectar su conservación. Analizar que percepción poseen los actores vinculados a los sistemas productivos sobre el rol de la biodiversidad en estos es un factor clave para lograr su sustentabilidad dado que la misma depende de la identificación, interpretación y organización de las sensaciones para producir una experiencia significativa acerca del mundo. El objetivo de este trabajo fue explorar la percepción que tienen los y las estudiantes de las Facultad de Ciencias Forestales de la Universidad Nacional de Misiones (FCF-UNaM) sobre el rol de la biodiversidad en los sistemas productivos. Se realizó una encuesta estructurada y los datos se analizaron a través de estadística descriptiva. En su mayoría los estudiantes perciben compatible la conservación de la biodiversidad en los sistemas productivos. Esto podría estar relacionado con una percepción positiva entre la biodiversidad y la provisión de servicios ecosistémicos, el aumento de los rendimientos y un mayor valor monetario de la chacra.; Misiones (Argentina) conserves one of the most biodiverse regions in the world. Currently, the expansion of forestry-agricultural activities could affect its conservation. Analyzing the perception of the stakeholders linked to productive systems about the role of biodiversity in ones is a key factor to achieve their sustainability. It depends on the identification, interpretation and organization of sensations to produce a meaningful experience about the world. The objective of this work was to explore the perception that students of the Faculty of Forestry Sciences of the National University of Misiones (FCF-UNaM) have about the role of biodiversity in productive systems. A structured survey was developed and collect data were analyzed through descriptive statistics. Most of the students perceive the conservation of biodiversity in productive systems as compatible. This could be related to a positive perception between biodiversity and the provision of ecosystem services, increased yields and a higher monetary value of the farm. Fil: Friedenberger, Tamara Aurora Belén. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: De Matos, Marcela. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.; Fil: Gelabert, Cecilia Corina. Consejo Nacional de Investigaciones Científicas y Técnicas. Facultad de Ciencias Forestales; Argentina.; Fil: Gelabert, Cecilia Corina. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina.

2022-11-23T00:00:00Z https://hdl.handle.net/20.500.12219/5069 2024-05-10T13:09:57Z 2020-01-01T00:00:00Z

Características Tecnológicas de Phyllostachys aurea Riviere & C. Riviere Las labores desarrolladas se llevaron a cabo tomando como guía base lo expuesto en el plan de trabajo. Los culmos de los bambúes cortados sesecaron al aire libre para que se estabilicen. Luego se procedió según laNORMA ISO 22157-1:2004a marcar y cortar las diferentes probetas a ser ensayadas tanto para las propiedades físicas como las propiedades mecánicas. Se registraron las probetas con un código para su identificación y las dimensiones de las mismas. Se realizaron los ensayosde las probetas de bambú,de los que se obtuvieron los valores de resistencia mecánica, el contenido de humedad y sus pesos específicos aparentes. Con los datos obtenidos, se procedió a sistematizarlos y a realizar los análisis estadísticos correspondientes. Posteriormente se registraron los resultados según los objetivos del plan de trabajo y se determinó si la especiePhyllostachys aurea Riviere & C. Rivierepresenta propiedades tecnológicas aptas para mobiliarios y productos para la construcción Fil: Gómez, Benjamín De Jesús. Becario de la Facultad de Ciencias Forestales de la Universidad Nacional de Misiones; Argentina.; Fil: Broz, Diego Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.

2020-01-01T00:00:00Z