26 10 20655 https://www.socictopen.socict.org/files/original/6bec71f9b5b74a284b4e0e7cf423304d.pdf 545d87b3a5a190a306554558a07c38b8 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Contribuciones al conocimiento sobre la Ecología y distribución geográfica de Phrynops (Batrachemys) Dahli; (Testudinata, Pleurodira, Chelidae) Contribuciones al conocimiento sobre la Ecología y distribución geográfica de Phrynops (Batrachemys) Dahli; (Testudinata, Pleurodira, Chelidae) Creator An entity primarily responsible for making the resource Medem Federico Description An account of the resource 1. Data on Ecology, Behavior and Geographical Distribution of the chelid turtle, Phrynops (Batrachemys) dahli, are reported. 2. The original habitat of the 'carranchina' or 'cabeza al lado' consisted in ponds and small brooks within the forests, a situation which has gradually changed; actually the entire area around the type locality is transformed into pastures. 3. It is principally carnivorous and feeds on snails, aquatic insects, tadpoles, frogs, small fishes, carrion, but also sometimes on vegetable matter. No endoparasites had been found. 4. A marked dimorphism exists between the two sexes (figs. 2, 4, 5). 5. The mating season takes place in June-July approximately. 6. From one to six white, hard-shelled, slightly ellipsoid eggs are laid mainly in September-October; they measure between 35.5 : 29.0 mm. and. 28.0 : 23.5 mm. (fig. 7). 7. In several females, captured in May 22, 1958, which died in June 1959, hard-shelled eggs and numerous ovules had been found. 8. A female, captured in September 24, 1963, laid October 22, 1963, four eggs in a shallow groove without covering them, possibly due to lack of time or the hard soil full of pebbles. Three of those eggs were apparently not fertilized and became dry within two months; the last one was finally opened in August 14, 1964; it measured 34.5 : 26.5 mm. and contained a Fetus almost ready to hatch (fig. 6); its Carapax measured 28.0 mm, (length) and 22.5 mm. (width); the very protruding vitelline sack (12.0 : 11.0 mm.) still covered the Plastron; an easy discernible Oviruptor was present. This does not necessarily mean that the incubation period normally lasts over ten months, but rather seems to indicate that the eggs are resistant enough to develop in spite of a prolonged dry season - common in the given area - without suffering lethal effects. 9. Taken from the great number of ovules in different state of development, together with hard-shelled eggs, it seems to indicate the possibility that the same female lays several times over long periods. Future investigations are, of course, needed before more conclusive statements on this and other problems concerning reproduction can be made. 10. In its natural habitat, dahli is rather scarce and, moreover, hard to detect due to its secret habits. 11. They prefer rather shallow, quiet waters, where they mostly swim slowly close to the bottom with their long necks outstreched and the nose inclined downward in search of food, but are also able to swim quickly by means of their powerful, stronly webbed feet. 12. Equally well adapted to life on ground, they might be considered as virtually amphibious; active mainly from 5.30 - 7 a. m. and 5 - 7 p. m., they walk frequently over long distances; if persecuted, they run first very quickly and with their neck bent; cornered, they show a particular reaction: They stop and stretch out their hind legs until the anterior border of the shell becomes inclined and in contact with the ground; thus, the neck - never entirely covered by the shell - will be more protected; they remain in this position until the persecutor retires. 13. Apparently they undergo an Estivation; in captivity where water is plenty, they also lay hurried frequently in the soil or hidden in the shadow of underbrush under rotten leaves for several weeks, and are easily to confound with stones or rotten pieces of wood, due to the protective coloration of the grayish or olive brown upperside of their shells. 14. A strange habit was observed in specimens kept in the aquarium during the first months after being captured: Adults of both sexes, but more frequently the males, hit the glass or the border of the aquarium with their mandibles by means of very quick movements of the head; thus, the contact between the horny layer of the underside of mandible and the glass produces a series of klicking sounds; they did it only at night (8.00 - 10.00 p. m. approximately), rather frequently and each time for several seconds; this habit became lost after about four months in captivity.  Since movements and sounds produce vibrations in the water, this behavior may possibly be connected with some biological function, as e. g., to facilitate the meeting of the two sexes during mating season, or to announce the presence of an individual within a fixed territory, already occupied; the function could also be a combined one. 15. Specimens have been collected only from the type locality, Sincelejo (Bolivar), 200 meters high, but have been later reported by local inhabitants from different places within the same general region (see map). 16. Chelid turtles were formerly supposed to range only from Colombia, south of Cordillera Oriental, to northern Argentina, but now they are know to extend to north-western Colombia close to the shore of the Caribbean Sea. Since fossil shells of Chelus fimbriatus, together with others of a pelomedusid turtle, Podocemis spec., have been found at La Venta (Huila), a site belonging to Honda group of Late Miocene, situated north of Cordillera Oriental, it seems evident, that the range of the Chelidae extended farther north, before the last formation of the Eastern Andes during Pleistocene. Thus, there exists also the possibility that one or several members of this family had migrated as far as that region, actually still occupied by an isolated form, during Terciary. 1. Data on Ecology, Behavior and Geographical Distribution of the chelid turtle, Phrynops (Batrachemys) dahli, are reported. 2. The original habitat of the 'carranchina' or 'cabeza al lado' consisted in ponds and small brooks within the forests, a situation which has gradually changed; actually the entire area around the type locality is transformed into pastures. 3. It is principally carnivorous and feeds on snails, aquatic insects, tadpoles, frogs, small fishes, carrion, but also sometimes on vegetable matter. No endoparasites had been found. 4. A marked dimorphism exists between the two sexes (figs. 2, 4, 5). 5. The mating season takes place in June-July approximately. 6. From one to six white, hard-shelled, slightly ellipsoid eggs are laid mainly in September-October; they measure between 35.5 : 29.0 mm. and. 28.0 : 23.5 mm. (fig. 7). 7. In several females, captured in May 22, 1958, which died in June 1959, hard-shelled eggs and numerous ovules had been found. 8. A female, captured in September 24, 1963, laid October 22, 1963, four eggs in a shallow groove without covering them, possibly due to lack of time or the hard soil full of pebbles. Three of those eggs were apparently not fertilized and became dry within two months; the last one was finally opened in August 14, 1964; it measured 34.5 : 26.5 mm. and contained a Fetus almost ready to hatch (fig. 6); its Carapax measured 28.0 mm, (length) and 22.5 mm. (width); the very protruding vitelline sack (12.0 : 11.0 mm.) still covered the Plastron; an easy discernible Oviruptor was present. This does not necessarily mean that the incubation period normally lasts over ten months, but rather seems to indicate that the eggs are resistant enough to develop in spite of a prolonged dry season - common in the given area - without suffering lethal effects. 9. Taken from the great number of ovules in different state of development, together with hard-shelled eggs, it seems to indicate the possibility that the same female lays several times over long periods. Future investigations are, of course, needed before more conclusive statements on this and other problems concerning reproduction can be made. 10. In its natural habitat, dahli is rather scarce and, moreover, hard to detect due to its secret habits. 11. They prefer rather shallow, quiet waters, where they mostly swim slowly close to the bottom with their long necks outstreched and the nose inclined downward in search of food, but are also able to swim quickly by means of their powerful, stronly webbed feet. 12. Equally well adapted to life on ground, they might be considered as virtually amphibious; active mainly from 5.30 - 7 a. m. and 5 - 7 p. m., they walk frequently over long distances; if persecuted, they run first very quickly and with their neck bent; cornered, they show a particular reaction: They stop and stretch out their hind legs until the anterior border of the shell becomes inclined and in contact with the ground; thus, the neck - never entirely covered by the shell - will be more protected; they remain in this position until the persecutor retires. 13. Apparently they undergo an Estivation; in captivity where water is plenty, they also lay hurried frequently in the soil or hidden in the shadow of underbrush under rotten leaves for several weeks, and are easily to confound with stones or rotten pieces of wood, due to the protective coloration of the grayish or olive brown upperside of their shells. 14. A strange habit was observed in specimens kept in the aquarium during the first months after being captured: Adults of both sexes, but more frequently the males, hit the glass or the border of the aquarium with their mandibles by means of very quick movements of the head; thus, the contact between the horny layer of the underside of mandible and the glass produces a series of klicking sounds; they did it only at night (8.00 - 10.00 p. m. approximately), rather frequently and each time for several seconds; this habit became lost after about four months in captivity.  Since movements and sounds produce vibrations in the water, this behavior may possibly be connected with some biological function, as e. g., to facilitate the meeting of the two sexes during mating season, or to announce the presence of an individual within a fixed territory, already occupied; the function could also be a combined one. 15. Specimens have been collected only from the type locality, Sincelejo (Bolivar), 200 meters high, but have been later reported by local inhabitants from different places within the same general region (see map). 16. Chelid turtles were formerly supposed to range only from Colombia, south of Cordillera Oriental, to northern Argentina, but now they are know to extend to north-western Colombia close to the shore of the Caribbean Sea. Since fossil shells of Chelus fimbriatus, together with others of a pelomedusid turtle, Podocemis spec., have been found at La Venta (Huila), a site belonging to Honda group of Late Miocene, situated north of Cordillera Oriental, it seems evident, that the range of the Chelidae extended farther north, before the last formation of the Eastern Andes during Pleistocene. Thus, there exists also the possibility that one or several members of this family had migrated as far as that region, actually still occupied by an isolated form, during Terciary. Date A point or period of time associated with an event in the lifecycle of the resource 1966 Subject The topic of the resource Batrachemys, Chelidae, Testudinata, pleurodira Source A related resource from which the described resource is derived Caldasia Publisher An entity responsible for making the resource available Universidad Nacional de Colombia Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Science, Botany, Zoology Relation A related resource <a href="http://www.revistas.unal.edu.co/index.php/cal/article/view/33707" target="_blank" rel="noreferrer noopener">http://www.revistas.unal.edu.co/index.php/cal/article/view/33707</a> https://www.socictopen.socict.org/files/original/5506b4d0d792b9e198711c8d950ca4d4.pdf 018e464613a2541bb02ed0461e7c497b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Is natural history really dead?: Toward the rebirth of natural history ¿Está realmente muerta la historia natural?: Hacia el renacimiento de la Historia Natural Creator An entity primarily responsible for making the resource JUAN J ARMESTO, MARY F WILLSON Description An account of the resource In recent years natural history has been derided by some scientists as an old-fashion endeavor that does not follow the model of 'hard' science and therefore should be considered 'dead' and replaced by modern ecology, evolutionary biology, and conservation biology. We contend that natural history has much to offer to contemporary scientists and that it has a primary role in the creative process of generating novel hypotheses and designing significant field experiments and observationsEn años recientes, la historia natural ha sido desacreditada por científicos que la consideran un modelo obsoleto de ciencia y que, en consecuencia, se trataría de una disciplina 'muerta' que ha sido reemplazada por la ecología moderna, la biología evolutiva y la biología de la conservación. Argumentamos aquí que la historia natural tiene mucho que ofrecer a los científicos contemporáneos y que juega un rol principal en el proceso de creación de hipótesis y en el diseño acertado de observaciones y experimentos de campo Date A point or period of time associated with an event in the lifecycle of the resource 2006 Subject The topic of the resource basic science, biologists, biólogos, ciencia básica, ecology, ecología, naturalistas, naturalists Source A related resource from which the described resource is derived Revista Chilena de Historia Natural Publisher An entity responsible for making the resource available BMC Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Botany, Zoology Relation A related resource <a href="http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2006000200013" target="_blank" rel="noreferrer noopener">http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2006000200013</a> https://www.socictopen.socict.org/files/original/94b07972130dda5d85b58a600f256f2b.pdf 57a605894f1da4c6fa5f29df7c5fa43d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Comportamento exófilo de Anopheles darlingi Root, em região meridional do Brasil Exophilic behavior of Anopheles darlingi Root in a Southern Region of Brazil Creator An entity primarily responsible for making the resource Oswaldo Paulo Forattini Description An account of the resource Observou-se o comportamento da população 'Araraquara' de Anopheles darlingi, em seu ambiente original e em relação à sua atividade exófila com isca humana. As coletas foram realizadas às margens do rio Jacaré-Pepira, no Município de Dourado, Estado de São Paulo, Brasil. O ciclo nictemeral caracteriza-se pelo aspecto bimodal, com os dois picos correspondentes a cada crepúsculo, ou seja, vespertino e matutino. O seu detalhamento permitiu detectar bimodalidade secundária, subdividindo cada pico em um eocrepuscular precedendo ao intracrepuscular propriamente dito. A variação sazonal revelou aumento do número de mosquitos na estação chuvosa e quente e nítido declínio na seca e fria. Embora com dados insuficientes, houve indícios de que o An. albitarsis local, apresente também ritmo bimodal em seu ciclo diário de atividade.Fortnightly 25-hour catches, with human bait, were carried out in a modified environment of the 'Jacaré-Pepira' River, Dourado County, S. Paulo, Brazil which is the original region of the 'Araraquara' strain of Anopheles darlingi. The exophylic biting activity was mostly nocturnal with bimodal rhythm, showing two clear peaks corresponding, respectively, to dusk and dawn. Going into crepuscular details two secondary peaks were observed, an eocrepuscular preceding the intracrepuscular one As, by means of chromosome arrangement studies, this population was found to have low polymorphism, it is supposed that those rhythms are, in a good measure, of endogenous command. The number of mosquitoes biting increased during the hot, wet season and decreased remarkably during the dry, cold one. There was some evidence that An albitarsis may also show a bimodality in its nocturnal biting activity rhythm. Date A point or period of time associated with an event in the lifecycle of the resource 1987 Subject The topic of the resource Anopheles albitarsis, Anopheles darlingi, Culicidae, Malaria, ecology, ecología, mosquitoes Identifier An unambiguous reference to the resource within a given context 10.1590/S0034-89101987000400002 Source A related resource from which the described resource is derived Revista de Saúde Pública Publisher An entity responsible for making the resource available Universidade de São Paulo Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Public aspects of medicine Relation A related resource <a href="http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0034-89101987000400002" target="_blank" rel="noreferrer noopener">http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0034-89101987000400002</a> https://www.socictopen.socict.org/files/original/9fcf346faef1b9ee71f64154e567d93e.pdf e37749e16c06a5f6b975669fecfd639b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource La sociología ante el medio ambiente Creator An entity primarily responsible for making the resource TERESA ROJO Description An account of the resource Este artículo presenta, desde una perspectiva histórica que se remonta al primer tercio de siglo, las contribuciones de la sociología al estudio de las relaciones, socialmente significativas, de los seres humanos con el medio ambiente físico y biológico. Frente a las pretensiones de marginación el autor destaca: (a) las distintas etapas en que la sociología aborda el medio ambiente, variando la perspectiva según la problemática social del momento y las influencias teóricas renovadas que incorporan los distintos investigadores; (b) la interdisciplinaridad creciente de este campo, originariamente 'ecología humana' pero también 'sociología del medio ambiente', que valoriza a la sociología por haberlo instituido y constituye un patrimonio en su comunicación con otras ciencias, y (c) la creciente relevancia social del medio ambiente físico y biológico como factor de discernimiento en las decisiones políticas, que requiere una oferta académica que capacite a los sociólogos para contribuir al diseño interdisciplinar de los proyectos técnico-organizativos, de transformación de las condiciones de vida de poblaciones humanas, en entornos físicos específicos. Date A point or period of time associated with an event in the lifecycle of the resource 1991 Subject The topic of the resource Sociología del medio ambiente, Teoría social, ecología Source A related resource from which the described resource is derived Revista Española de Investigaciones Sociológicas (REIS) Publisher An entity responsible for making the resource available Centro de Investigaciones Sociológicas (CIS) Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Social Sciences Relation A related resource <a href="http://reis.cis.es/REIS/PDF/REIS_055_07.pdf" target="_blank" rel="noreferrer noopener">http://reis.cis.es/REIS/PDF/REIS_055_07.pdf</a> https://www.socictopen.socict.org/files/original/f71c169be293e47ddd775a7f7e2bbefd.pdf 545d87b3a5a190a306554558a07c38b8 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Estudios ecológicos en la Cordillera Oriental – II: Las comunidades vegetales de los alrededores de la laguna de Chingaza (Cundinamarca) Estudios ecológicos en la Cordillera Oriental – II: Las comunidades vegetales de los alrededores de la laguna de Chingaza (Cundinamarca) Creator An entity primarily responsible for making the resource Rangel Ch. Orlando, Lozano C. Gustavo, Franco R. Pilar Description An account of the resource The plant communities present along an altitudinal transect between 3.000-3.600 m above sea level around Chingaza lake, Cundinamarca, Colombia, are described following the Zurich-Montpellier System. The zonal plant communities (WALTER. 1964) belong to the life zones refered to as 'Paramo' and 'Andean' by CUATRECASAS (1934, 1958) and RANGEL et al., (1982).  The azonal plant communities (marsh communities) are briefly studied.  New information about synecological aspects and geographic distribution is provided together with a provisional sintaxonomic classification of the vegetation of the area. Mediante la utilización de los lineamientos metodológicos de la Escuela, Zurich-Montpellier, se tipifican y describen las comunidades vegetales de los alrededores de la Laguna de Chingaza (Cundinamarca) entre 3.000 y 3.600 m.  Las comunidades zonales (WALTER, 1964) se pueden ubicar según los esquemas propuestos por CUATRECASAS (1934, 1958)  y por RANGEL et al., (1982) en las zonas de vida Paramuna y Andina (franja alto-andina); la vegetación azonal (de pantano) también se reseña.  Igualmente se presenta información adicional que incluye aspectos sinecológicos y corológicos y se propone un arreglo sintaxonómico provisional de la vegetación estudiada. Date A point or period of time associated with an event in the lifecycle of the resource 1986 Subject The topic of the resource Aspectos corológicos, Ecología de parámos, Flora de páramos, comunidades vegetales, sinecología Source A related resource from which the described resource is derived Caldasia Publisher An entity responsible for making the resource available Universidad Nacional de Colombia Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Science, Botany, Zoology Relation A related resource <a href="http://www.revistas.unal.edu.co/index.php/cal/article/view/35042" target="_blank" rel="noreferrer noopener">http://www.revistas.unal.edu.co/index.php/cal/article/view/35042</a> https://www.socictopen.socict.org/files/original/a1963791ae9ace3654ae571c0aa8aa9e.pdf c9f19d4893a56c4ede8e783abe85e36a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Leaf life spans of some conifers of the temperate forests of South America Longevidad foliar de algunas coníferas de los bosques templados de Sudamérica Creator An entity primarily responsible for making the resource CHRISTOPHER H. LUSK Description An account of the resource Interspecific variation in leaf life span has wide-ranging implications for plant species sorting on resource availability gradients, and for ecosystem processes such as nutrient cycling. Very little is known about leaf life spans of evergreen trees in the temperate forests of South America. Leaf life spans were estimated by static demographic methods, and associated leaf traits measured, for four conifers of this region. It was expected that leaf life span variation would correlate negatively with soil fertility of habitats normally occupied by each species. This prediction was upheld by the data. The mean leaf life span determined for Araucaria araucana (24 years) is among the highest figures reported for any plant species. This extreme leaf longevity was associated with very robust construction (high leaf mass per unit area) and very low nitrogen content. These aspects of the ecology of A. araucana may affect its fitness in two ways. Firstly, slow foliage turnover will reduce its annual nutrient requirements for crown maintenance, a trait that is thought to be crucial for survival on nutrient-poor sites. Secondly, the low decomposability of A. araucana leaf litter is likely to cause nutrient immobilisation, possibly favouring site retention by A. araucana in the face of competition from faster-growing but more nutrient-demanding species. Interspecific variation in leaf life span appeared to be systematically related to variation in leaf mass per unit area (LMA) and leaf nitrogen, in agreement with a large body of evidence that leaf evolution is constrained by a trade-off between trait combinations which optimise carbon gain and growth in resource-rich habitats, and those which favour persistence in chronically adverse environmentsLas diferencias específicas en longevidad foliar tienen importantes implicancias para la distribución de las plantas en relación con gradientes de recursos, y en procesos ecosistémicos tales como el ciclaje de nutrientes. Se conoce muy poco acerca de la longevidad foliar de las especies arbóreas siempreverdes de los bosques templados de Sudamérica. Se estimaron longevidades foliares mediante métodos demográficos 'estáticos' para cuatro especies de coníferas de esta región; además se midieron otros rasgos foliares (masa seca por unidad de area = 'LMA', y contenido de nitrógeno). Se anticipó que las diferencias interespecíficas en longevidad foliar estarían negativamente correlacionadas con la disponibilidad de nutrientes en los hábitats normalmente ocupados por las distintas especies, predicción que fue apoyada por los datos. La longevidad foliar promedio determinada para Araucaria araucana (24 años) se destaca entre las cifras más altas reportadas en la literatura para cualquier especie. Esta extrema longevidad se asocia con una construcción muy robusta (LMA alta), y muy bajo contenido de nitrógeno. Dichos aspectos de la ecología de A. araucana podrían incidir de dos maneras en su adecuación. Primero, el lentísimo recambio de su follaje reduciría sus requerimientos anuales de nutrientes, un rasgo que puede ser clave para su supervivencia en sitios muy infértiles. Segundo, la baja descomposabilidad de su hojarasca daría lugar a una inmovilización de nutrientes, posiblemente permitiendo que A. araucana retenga ciertos sitios, frente la competencia de especies potencialmente más vigorosas pero con mayores requerimientos nutricionales. La variación interespecífica en longevidad foliar parecía presentar relaciones estrechas con variación en LMA y porcentaje de nitrógeno foliar. Dicho resultado es coherente con las evidencias arrojadas por otros estudios, que indican que la evolución de las hojas estaría restringida por un compromiso entre combinaciones de rasgos que optimizan el rendimiento de la planta en hábitats favorables, y aquellas combinaciones que favorecen la persistencia en hábitats adversos Date A point or period of time associated with an event in the lifecycle of the resource 2001 Subject The topic of the resource Araucaria araucana, Podocarpus, gradientes de recursos, leaf longevity, leaf nitrogen, longevidad foliar, nitrógeno foliar, resource gradients, specific leaf area, área foliar específica Source A related resource from which the described resource is derived Revista Chilena de Historia Natural Publisher An entity responsible for making the resource available BMC Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Botany, Zoology Relation A related resource <a href="http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2001000300017" target="_blank" rel="noreferrer noopener">http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2001000300017</a> https://www.socictopen.socict.org/files/original/3513fabe1985428a50032a0ebde1d805.pdf 6fa14b23dc0c1e85bf990a58ec44a3fc Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Validación de escala de la seguridad alimentaria doméstica en Antioquia, Colombia Validation of a household food security scale in Antioquia, Colombia Creator An entity primarily responsible for making the resource Hugo Melgar-Quiñonez, Marta Cecilia Álvarez, Alejandro Estrada, Elizabeth Cristina Montoya Description An account of the resource OBJETIVO: Adaptar y validar en hogares de Antioquia, Colombia, una escala de seguridad alimentaria anteriormente aplicada en hogares de Caracas, Venezuela. MATERIAL Y MÉTODOS: El estudio se realizó en 44 municipios del departamento de Antioquia, Colombia, durante los años 2003 y 2004, en una muestra representativa de los hogares rurales y urbanos del departamento de Antioquia, constituida por 1 624 hogares con niños menores de 10 años; los hogares fueron seleccionados de manera aleatoria, con un índice de confianza de 95% y un error de 3%. Se validó la escala de seguridad alimentaria doméstica utilizada por Paulina Lorenzana en Venezuela, y se determinó la consistencia interna de la escala mediante el coeficiente de correlación de Spearman y el coeficiente alfa de Cronbach. La validez del constructo se estableció mediante el método de componentes principales para datos categóricos. Se utilizaron el procedimiento de Prinqual y el modelo de Rasch para definir los componentes y los ��tems de la escala. RESULTADOS: El análisis factorial arrojó dos componentes: 1) las variables relacionadas con 'inseguridad alimentaria sin hambre' que lo explican en 95% y 2) las relacionadas con 'inseguridad alimentaria con hambre' que lo explican en 89.4%. El coeficiente alfa de Cronbach para el primer componente fue de de 0.95 y para el segundo de 0.89. Al ser analizados con el modelo Rasch, todos los ítems presentaron valores infit en un rango de 0.8 a 1.2. La escala se correlacionó significativamente con la disponibilidad de alimentos, el recurso de la limosna, el trabajo infantil, el tamaño del hogar y la ocupación del jefe de familia (p< 0.000). CONCLUSIÓN: La escala puede considerarse un instrumento confiable para la valoración de la inseguridad alimentaria en los hogares de Antioquia.OBJETIVE: To adapt and validate in households of Antioquia, Colombia, a food security scale previously applied in households of Caracas, Venezuela. MATERIAL AND METHODS: The study was carried out in 44 municipalities in the department of Antioquia, Colombia, in 2003 and 2004, with a randomly selected sample of 1 624 rural and urban households with children under 10 years of age, representative for family units located in the department of Antioquia. The sample was selected using a confidence interval of 95% and an error of 3%. Household food security scale previously used by Paulina Lorenzana in Venezuela were validated for this survey. Internal consistency of the scale was determined using the Spearman correlation coefficient and Cronbach's Alpha coefficient. Construct validity was established through principal components analysis for categorical data. Prinqual procedure and Rasch modeling were used to define the components and items in the scale. RESULTS: Factor analysis showed two components: 1) variables related to 'food insecurity without hunger', which is explained in 95%; 2) variables related to 'food insecurity with hunger', which is explained in 89.4%. Cronbach's Alpha coefficients for 'food insecurity without hunger' and 'food insecurity with hunger' were 0.95 and 0.89, respectively. When analyzed using Rasch modeling, all items showed infit values within a range of 0.8 and 1.2. The scale correlated significantly (p Date A point or period of time associated with an event in the lifecycle of the resource 2006 Subject The topic of the resource Antioquia, Colombia, food insecurity, inseguridad alimentaria, validación, validation Source A related resource from which the described resource is derived Salud Pública de México Publisher An entity responsible for making the resource available Instituto Nacional de Salud Pública Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Public aspects of medicine Relation A related resource <a href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0036-36342006000600005" target="_blank" rel="noreferrer noopener">http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0036-36342006000600005</a> https://www.socictopen.socict.org/files/original/7fe3e7501437ae9a1bd422bbccaa3af5.pdf 7dc2d717992975747b09f1af6c2b49bc Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Mudanças climáticas: aquecimento e esfriamento Creator An entity primarily responsible for making the resource Henrique Rattner Description An account of the resource &lt;span style='font-size: 12.0pt; font-family: &amp;quot;Times New Roman&amp;quot;,&amp;quot;serif&amp;quot;; mso-fareast-font-family: &amp;quot;Times New Roman&amp;quot;; mso-ansi-language: PT-BR; mso-fareast-language: PT-BR; mso-bidi-language: HE;'&gt;Ap&amp;oacute;s in&amp;uacute;meras reuni&amp;otilde;es e confer&amp;ecirc;ncias nacionais, regionais e internacionais, nas quais se destacam a COP-15 realizada em 2009 em Copenhague, a COP-16 de 2010 realizada em Cancun, M&amp;eacute;xico e a pr&amp;oacute;xima, programada para realizar-se em Durban, &amp;Aacute;frica do Sul, em 2011, &amp;eacute; preciso admitir que os debates, sobretudo as medidas concretas para conter o aquecimento global pouco tem progredido, apesar dos Protocolos anteriormente assinados de Kyoto (1995) e de Montreal (1987) e v&amp;aacute;rios outros.&amp;nbsp;&lt;/span&gt; Date A point or period of time associated with an event in the lifecycle of the resource 2011 Subject The topic of the resource Política Internacional, ecología, economía mundial, meio ambiente Source A related resource from which the described resource is derived Revista Espaço Acadêmico Publisher An entity responsible for making the resource available Universidade Estadual de Maringá Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Social sciences (General) Relation A related resource <a href="http://periodicos.uem.br/ojs/index.php/EspacoAcademico/article/view/13317" target="_blank" rel="noreferrer noopener">http://periodicos.uem.br/ojs/index.php/EspacoAcademico/article/view/13317</a> https://www.socictopen.socict.org/files/original/8462e085721aa0f77045c0bf63352b2b.pdf 2436a09eed07ec0ec82407ab5a907446 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Marine habitats map of 'Isla del Caño', Costa Rica, comparing Quickbird and Hymap images classification results Creator An entity primarily responsible for making the resource Carlomagno Soto, Jorge Cortés, A.C Fonseca, Héctor M Guzmán Description An account of the resource Isla del Caño is a marine protected area on the south Pacific coast of Costa Rica, surrounded by coral reefs and coral communities. The ecology of these coral reefs has been studied for over 20 years, but they have not been mapped. Maps are considered a great research, planning, management and monitoring tool. Medium to high resolution images (HyMap 2005 and Quickbird 2007 respectively) were processed and classified in order to test and compare their accuracy in producing a marine habitat map. Manta tow surveys were performed in the field for identification of 7 marine habitats 1. Coral community; 2. Coral reef; 3. Bed rock; 4. Sand; 5. Sand with boulders; 6. Sand with rodolyths; and 7. Deep water. The overall accuracy was slightly higher using Quickbird (87%) than using Hymap (60%), however the difference was not significant. The map produced using Quickbird was selected to represent the marine habitats of Isla del Caño. This map will help to analyze the adequate size and zoning of the marine protected area. Rev. Biol. Trop. 58 (1): 373-381. Epub 2010 March 01.Isla del Caño es un área marina protegida en la costa del Pacífico de Costa Rica y está rodeada de arrecifes coralinos. La ecología de estos arrecifes coralinos ha sido estudiada a lo largo de 20 años pero todavía no habían sido mapeados. Los mapas son considerados una buena herramienta de investigación, planificación, manejo y monitoreo. Imágenes de mediana y alta resolución (Hymap 2005 y Quickbird 2007 respectivamente) fueron procesadas y clasificadas con el fin de evaluar y comparar su desempeño en la elaboración de un mapa de hábitats marinos. En el campo se realizaron sondeos tipo Manta para la identificación de siete hábitats marinos: 1. Comunidad coralina; 2. Arrecife coralino; 3. Roca; 4. Arena; 5. Arena con cantos; 6. Arena con rodolitos; y 7. Agua profunda. La exactitud de la clasificación resultó un poco mayor usando Quickbird (87%) que Hymap (60%), sin embargo la diferencia no era significativa. Se seleccionó el mapa resultante de la clasificación con Quickbird para representar los hábitats marinos de Isla del Caño. Este mapa puede ayudar a analizar el tamaño adecuado y la zonificación del área marina protegida. Date A point or period of time associated with an event in the lifecycle of the resource 2010 Subject The topic of the resource Costa Rica, HyMap, Isla del Caño, QuickBird, arrecifes de coral, coral reef, mapa de hábitats marinos, marine habitat map Source A related resource from which the described resource is derived Revista de Biología Tropical Publisher An entity responsible for making the resource available Vicerractoría Investigación Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Biology (General) Relation A related resource <a href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442010000100027" target="_blank" rel="noreferrer noopener">http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442010000100027</a> https://www.socictopen.socict.org/files/original/b9cb38ba214693f20b51408703ef364c.pdf ddba1812bd7d7992034e494a51761e1b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Crimen y violencia urbana. Aportes de la ecología del delito al diseño de políticas públicas Creator An entity primarily responsible for making the resource Liliana Manzano Chávez, Mauricio Olavarría Gambi, Ximena Tocornal Montt, Hugo Fruhling Erlich Description An account of the resource Este artículo presenta la investigación, con el mismo título de este artículo, adjudicada en el II Concurso de Anillos de Investigación en Ciencias Sociales, en marzo del 2008, por CONICYT. La pregunta que da inicio a la investigación es ¿Cómo abordar el fenómeno del crimen y violencia urbana? Para responder la pregunta la investigación se ha centrado en el marco conceptual provisto por la Teoría Ecológica del Delito y el concepto de 'eficacia colectiva del barrio'. La investigación espera producir conocimiento relevante en el área, basado en evidencia empírica, que permita contribuir significativamente al diseño de políticas públicas integrales que aborden los variados aspectos que concurren a la seguridad ciudadana. Date A point or period of time associated with an event in the lifecycle of the resource 2008 Source A related resource from which the described resource is derived Revista INVI Publisher An entity responsible for making the resource available Universidad de Chile Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Architecture, Fine Arts Relation A related resource <a href="http://www.redalyc.org/articulo.oa?id=25806402" target="_blank" rel="noreferrer noopener">http://www.redalyc.org/articulo.oa?id=25806402</a>