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Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
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Issues in Science & Technology     Free   (Followers: 8)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 2)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
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Anales del Instituto de la Patagonia
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ISSN (Online) 0718-686X
Published by SciELO Homepage  [688 journals]
  • Desarrollo sustentable para las generaciones futuras: una reflexión
           necesaria

    •  
  • Nuevos antecedentes de parásitos gastrointestinales presentes en razas
           ovinas de carne en Magallanes

    • Abstract: RESUMEN: Con el objeto de describir la situación parasitaria gastrointestinal de las razas carniceras ovinas introducidas a Magallanes y su efecto sobre su crecimiento, corderos de las razas Polled Dorset, Texel y Suffolk fueron seleccionados post destete. Se controlaron 35 machos y 35 hembras por raza. A los 3 meses fueron destetados y se obtuvo tanto los pesos mensuales, así como muestras de fecas para recuento y cultivo. A los 3 meses de edad, no se evidencia diferencia entre las razas para el recuento total de parásitos. Se observó una interacción raza*sexo*parto para estróngilos (P=0,0056), donde machos mellizos de la raza Polled Dorset mostraron una carga parasitaria superior a machos únicos, hembras mellizas de la misma raza y de la Suffolk, machos y hembras únicos Suffolk y Texel. A los 6 meses de edad, la totalidad de animales se encuentra parasitado y se observó una interacción raza*sexo*parto (P=0,044) para Nematodirus, donde hembras de parto único, de la raza Suffolk, presentaron menores recuentos que machos mellizos de la misma raza y de la raza Texel. No se observó diferencia al cultivo larvario entre las razas de ovinos evaluadas. Existió una correlación negativa entre los pesos a los 5 meses (r2=-0,28; P=0,025), 6 (r2=-0,32; P=0,01) y 7 (r2=-0,37; P=0,004), con el recuento de Nematodirus a los 6 meses. En conclusión, existiría parasitosis en animales de razas carniceras, si bien estos recuentos son bajos, pero la raza Suffolk aparece más sensible que Texel y Polled Dorset, lo que debe ser considerado en los manejos sanitarios.ABSTRACT: In order to describe the gastrointestinal parasite situation of sheep butcher breeds introduced to Magallanes and its effect on their growth, Lambs of the Polled Dorset, Texel and Suffolk breeds were selected post weaning. 35 males and 35 females per breed were controlled. At 3 months they were weaned and both the monthly weights were obtained, as well as fecal samples for counting and culture. At 3 months of age, there is no difference between the breeds for the total parasite count. A breed*sex*partum interaction was observed for strongylus (P=0.0056), where twin males of the Polled Dorset breed showed a higher parasite load than single males, twin females of the same breed and Suffolk, single males and females. Suffolk and Texel. At 6 months of age, all the animals are parasitized and a breed*sex*partum interaction (P=0.044) was observed for Nematodirus, where single-parturition females of the Suffolk breed had lower counts than twin males of the Suffolk breed. the same breed and of the Texel breed. No difference was observed in larval culture between the evaluated sheep breeds. There was a negative correlation between the weights at 5 months (r2=-0.28; P=0.025), 6 (r2=-0.32; P=0.01) and 7 (r2=-0.37; P =0.004), with the Nematodirus count at 6 months. In conclusion, there would be parasitism in animals of meat breeds, although these counts are low, but the Suffolk breed appears more sensitive than Texel and Polled Dorset, which should be considered in sanitary management.
       
  • Evaluación poblacional del ostión del sur Austrochlamys natans
           (Philippi, 1845) (bivalvia: pectinidae), en la bahía Parry, área marina
           costera protegida de múltiples usos, seno Almirantazgo y recomendaciones
           para su conservación

    • Abstract: RESUMEN: Austrochlamys natans es un molusco de importancia comercial, que desde 1970 ha formado parte de los desembarques pesqueros artesanales en Magallanes. Producto de la intensa explotación efectuada en la década de los 90, la autoridad pesquera estableció una veda permanente a partir del año 2001, no existiendo, hasta ahora, antecedentes recientes sobre su estado. Durante 2021, se realizó una evaluación poblacional en la bahía Parry, zona histórica de extracción ubicada en el Área Marina Costera Protegida de Múltiples Usos, seno Almirantazgo, donde esta especie es objeto de conservación. Se ejecutaron dos campañas de evaluación directa, realizándose estimaciones de densidad, abundancia, biomasa, estructura poblacional y determinación del estatus poblacional utilizando un modelo de análisis de pseudo-cohortes basado en la longitud. La información fue contrastada con estudios anteriores identificándose tres bancos naturales, con una superficie de 150.646 m2 y densidades que oscilaron entre 102 y 209 individuos/m2. Los bancos estaban conformados en más de un 99%, por individuos adultos en edad reproductiva. La talla y densidad promedio, aumentó de 72,8 a 75,5 cm de alto valvar y de 49 a 150 individuos/m2 entre el 2009 y 2021 respectivamente, justificado por una baja en la presión de pesca y el efecto combinado de la veda y la creación del Área Marina Costera Protegida de Múltiples Usos. La condición del stock fue de una población ligeramente sobreexplotada (37% biomasa virginal), se recomienda mantener los actuales niveles de esfuerzo de pesca para sostener una explotación sustentable. Además, se propuso la creación de una zona núcleo, para realizar investigaciones sobre asentamiento y conectividad entre los bancos identificados.ABSTRACT: Austrochlamys natans is a mollusk of commercial importance, which since 1970 has been part of the artisanal fish landings in Magallanes. As a result of the intense exploitation carried out in the 90s, the fishing authority established a permanent ban as of 2001, and there is, until now, no recent precedent on its status. During 2021, a population assessment was carried out in Parry Bay, a historic extraction area located in the Marine Coastal Protected Area of Multiple Uses, Almirantazgo Sound, where this species is subject to conservation. Two direct evaluation campaigns were carried out, making estimates of density, abundance, biomass, population structure and determination of population status using a length-based pseudo-cohort analysis model. The information was contrasted with previous studies, identifying three natural banks, with an area of 150,646 m2 and densities ranging between 102 and 209 individuals/m2. More than 99% of the shoals were made up of adult specimens of reproductive age. The average size and density increased from 72.8 to 75.5 cm of high valve and from 49 to 150 individuals/m2 between 2009 and 2021 respectively, justified by a decrease in fishing pressure and the combined effect of the closure and the creation of the Marine Coastal Protected Area of Multiple Uses. The condition of the stock was a slightly overexploited population (37% virgin biomass) and it was recommended to maintain the current levels of fishing effort to sustain sustainable exploitation. In addition, the creation of a core area was proposed, to carry out research on settlement and connectivity between the identified banks.
       
  • Primer registro de influenza aviar de alta patogenicidad en Leopardus
           geoffroyi (Felidae)

    • Abstract: RESUMEN: Austrochlamys natans es un molusco de importancia comercial, que desde 1970 ha formado parte de los desembarques pesqueros artesanales en Magallanes. Producto de la intensa explotación efectuada en la década de los 90, la autoridad pesquera estableció una veda permanente a partir del año 2001, no existiendo, hasta ahora, antecedentes recientes sobre su estado. Durante 2021, se realizó una evaluación poblacional en la bahía Parry, zona histórica de extracción ubicada en el Área Marina Costera Protegida de Múltiples Usos, seno Almirantazgo, donde esta especie es objeto de conservación. Se ejecutaron dos campañas de evaluación directa, realizándose estimaciones de densidad, abundancia, biomasa, estructura poblacional y determinación del estatus poblacional utilizando un modelo de análisis de pseudo-cohortes basado en la longitud. La información fue contrastada con estudios anteriores identificándose tres bancos naturales, con una superficie de 150.646 m2 y densidades que oscilaron entre 102 y 209 individuos/m2. Los bancos estaban conformados en más de un 99%, por individuos adultos en edad reproductiva. La talla y densidad promedio, aumentó de 72,8 a 75,5 cm de alto valvar y de 49 a 150 individuos/m2 entre el 2009 y 2021 respectivamente, justificado por una baja en la presión de pesca y el efecto combinado de la veda y la creación del Área Marina Costera Protegida de Múltiples Usos. La condición del stock fue de una población ligeramente sobreexplotada (37% biomasa virginal), se recomienda mantener los actuales niveles de esfuerzo de pesca para sostener una explotación sustentable. Además, se propuso la creación de una zona núcleo, para realizar investigaciones sobre asentamiento y conectividad entre los bancos identificados.ABSTRACT: Austrochlamys natans is a mollusk of commercial importance, which since 1970 has been part of the artisanal fish landings in Magallanes. As a result of the intense exploitation carried out in the 90s, the fishing authority established a permanent ban as of 2001, and there is, until now, no recent precedent on its status. During 2021, a population assessment was carried out in Parry Bay, a historic extraction area located in the Marine Coastal Protected Area of Multiple Uses, Almirantazgo Sound, where this species is subject to conservation. Two direct evaluation campaigns were carried out, making estimates of density, abundance, biomass, population structure and determination of population status using a length-based pseudo-cohort analysis model. The information was contrasted with previous studies, identifying three natural banks, with an area of 150,646 m2 and densities ranging between 102 and 209 individuals/m2. More than 99% of the shoals were made up of adult specimens of reproductive age. The average size and density increased from 72.8 to 75.5 cm of high valve and from 49 to 150 individuals/m2 between 2009 and 2021 respectively, justified by a decrease in fishing pressure and the combined effect of the closure and the creation of the Marine Coastal Protected Area of Multiple Uses. The condition of the stock was a slightly overexploited population (37% virgin biomass) and it was recommended to maintain the current levels of fishing effort to sustain sustainable exploitation. In addition, the creation of a core area was proposed, to carry out research on settlement and connectivity between the identified banks.
       
  • Nuevas localidades y mapa de distribución actualizado para Chile de la
           lagartija más austral del mundo: Liolaemus magellanicus (Squamata,
           Liolaemidae)

    • Abstract: RESUMEN: Se describen dos nuevas localidades de registro de la Lagartija magallánica Liolaemus magellanicus en la Región de Magallanes, una de las cuales representa el punto más oriental para Chile. Además, se detalla un mapa de distribución actualizado de la especie en Chile.ABSTRACT: Two new localities of the Magellanic Lizard Liolaemus magellanicus are described in the Magallanes Region, one of which represents the easternmost point for Chile. In addition, an updated distribution map in Chile for the species is detailed.
       
  • Complejidad y estabilidad en redes tróficas: un análisis de
           redes empíricas

    • Abstract: RESUMEN: Las redes tróficas describen las interacciones presa-depredador que ocurren en un hábitat determinado. Son herramientas útiles para analizar la complejidad y la estabilidad, así como la relación entre estas propiedades, en ecosistemas naturales. En este trabajo se estudió la estabilidad, medida mediante la conectividad (C=L/ S2, donde S es el número de especies y L el número de interacciones), y la relación complejidad-estabilidad a través de 314 redes tróficas empíricas, considerando distintos ecosistemas (dulceacuícolas, marinos y terrestres) con un amplio rango de complejidad. Para esto se consideraron dos indicadores de estabilidad, modularidad y el índice 'Quasi-Sign Stability', que fueron evaluados de manera general mediante una prueba no paramétrica (Kruskal-Wallis), y por tipo de ecosistema mediante comparaciones pareadas post-hoc (prueba de Wilcoxon). Los resultados muestran diferencias significativas en los indicadores de estabilidad analizados según el tipo de ecosistema. Con base en la modularidad, el orden creciente de estabilidad fue: redes marinas, dulceacuícolas y terrestres; con base en el índice 'Quasi-Sign Stability': terrestres, marinas y dulceacuícolas. La relación complejidad-estabilidad fue diferente no solo de acuerdo al indicador de estabilidad considerado, sino también al tipo de ecosistema. De esta manera, se sugiere que es fundamental considerar la multidimensionalidad de la estabilidad al evaluarla específicamente y en el contexto de la relación complejidad- estabilidad en redes tróficas, al igual que el tipo de ecosistema.ABSTRACT: Food webs describe the predator-prey interactions that occur in a given habitat. They are useful tools for analyzing complexity and stability, as well as the relationship between these properties, in natural ecosystems. In this work we studied stability, measured as connectance (C=L/S2, where S is the number of species and L the number of interactions), and the complexity-stability relationship in 314 empirical food webs considering different type of ecosystems (freshwater, marine and terrestrial) in a wide complexity range. For this we considered two indicators of stability, modularity and the 'Quasi-Sign Stability' index, which we evaluated generally using a non-parametric test (Kruskal-Wallis), and by ecosystem type applying post-hoc comparisons (Wilcoxon test). Our results show significant differences in the stability indicators analyzed according to the type of ecosystem. Based on modularity, the increasing order of stability was: marine, freshwater and terrestrial networks; based on the 'Quasi-Sign Stability' index: terrestrial, marine and freshwater. The complexity-stability relationship was different not only according to the stability indicator considered, but also the type of ecosystem. In this sense, we suggest that it is essential to consider the multidimensionality of stability when evaluating it specifically and in the context of the complexity-stability relationship in food webs, as well as the type of ecosystem.
       
  • Estado de conservación del mustélido Galictis cuja (Molina, 1782):
           análisis sobre las áreas de extensión de presencia y ocupación en
           Chile

    • Abstract: Resumen: La Unión Internacional para la Conservación de la Naturaleza (UICN) clasifica el estado de conservación de las especies en función de abundancias o tamaños de áreas de distribución. El criterio B, se aplica en función del Área de Extensión de Presencia (EOO) o del Área de Ocupación (AOO). En Chile, el Ministerio del Medio Ambiente (MMA), siguiendo los criterios de la UICN, clasificó al mustélido Galictis cuja como Preocupación Menor (Least Concern). En Chile, este mustélido se distribuiría entre las regiones de Arica y Aysén y en ese sentido, después de analizar su presencia en tres secciones, se planteó como objetivo determinar su nicho ecológico en nuestro país, determinar el EOO y el AOO según la metodología de la UICN y así, establecer el estado de conservación. El modelo de nicho ecológico se elaboró con el programa MaxEnt. El EOO se calculó con el método de la envolvente alfa y el AOO, mediante la ocupación de los registros en celdas de 2x2 km. Los resultados mostraron que el área del nicho ecológico para G. cuja cubrió 225.912 km2, el EOO fue de 166.801 km2 y el AOO de 392 km2. El EOO estimado por el MMA presentó 253631 km2 más que el aquí calculado, mientras que el AOO lo excedió en 535.232 km2. En función al AOO aquí obtenido (392 km2), G. cuja estaría en Peligro para Chile (Criterio B2ab,i,ii) y no como Preocupación Menor. Sobreestimar los EOO/AOO conduce a interpretaciones erróneas y mala aplicación del criterio B de la UICN, en consecuencia, revisar los estados de conservación de las especies que se sustentan en criterios de distribución es urgente y necesario para obtener un escenario más realista de sus categorías de conservación en Chile.Abstract: The International Union for Conservation of Nature (IUCN) classifies the conservation status of species based on abundances or sizes of distribution areas. Criterion B is applied based on the Extent of Occurrence (EOO) or Area of Occupancy (AOO). In Chile, the Ministry of the Environment (MMA), following IUCN criteria, classified the mustelid Galictis cuja as Least Concern. In Chile, this mustelid is distributed between the regions of Arica and Aysén, and therefore, the objective was to determine its ecological niche in our country, calculate the EOO and AOO following IUCN's methodology, and establish its conservation status. The ecological niche model was created using the MaxEnt program. The EOO was calculated using the alpha hull method, and the AOO was determined by the occupation of records within 2x2 km cells. The results showed that the ecological niche area for G. cuja covered 225,912 km2, the EOO was 166,801 km2, and the AOO was 392 km2. The EOO estimated by the MMA exceeded the calculated value by 253,631 km2, while the AOO exceeded it by 535,232 km2. Based on the AOO obtained here (392 km2), G. cuja would be classified as Endangered in Chile (Criterion B2ab,i,ii) instead of Least Concern. Overestimating EOO/AOO leads to erroneous interpretations and misapplication of the IUCN Criterion B. Consequently, it is urgent and necessary to review the conservation statuses of species based on distribution criteria to obtain a more realistic scenario of their conservation categories in Chile.
       
  • Composición, estructura y diversidad de matorrales enanos de Empetrum
           rubrum en la estepa magallánica continental e insular de Chile

    • Abstract: RESUMEN: Los matorrales enanos de Empetrum rubrum en la estepa magallánica, son hábitats únicos debido a que crecen en suelos ácidos y pobres en nutrientes. El objetivo de este estudio, fue describir la vegetación y las variables ambientales que caracterizan este tipo de ambiente. Se encontraron diferencias significativas entre los murtillares continentales y los ubicados al noreste de la isla de Tierra del Fuego, en términos de riqueza de especies y diversidad. A pesar de la aparente erosión, la proporción de especies nativas fue mayor que la de especies introducidas. El hábito de crecimiento dominante en términos de cobertura fueron los subarbustos enanos de E. rubrum en el continente y los de Baccharis magellanica en la isla de Tierra del Fuego. También se encontraron siete líquenes en los murtillares. La forma de vida dominante fueron las hemicriptofitas o hierbas perennes, lo anterior indica, que estos matorrales no están bajo una severa presión antropogénica, pero si presenta niveles altos de erosión que seguramente son la consecuencia del sobrepastoreo ocurrido en el pasado. Las propiedades físico-químicas del suelo analizadas, que mostraron diferencias significativas entre los murtillares fueron N-NO3, Mg, K, Na, CICE y el limo. Por otra parte, el Análisis Correspondencia Canónica (CCA) reveló un importante gradiente del suelo, donde el pH y la materia orgánica, junto con el contenido de macronutrientes (N, P, K), determinan diferencias entre los murtillares. Finalmente, se recomienda prestar más atención a la gestión y conservación de estos matorrales, considerando que estos pueden ser afectados por el manejo antrópico, como el pastoreo, las intervenciones mineras y el déficit hídrico, como ha ocurrido en el hemisferio norte, donde han dejado el suelo desnudo.ABSTRACT: The dwarf shrubiands of Empetrum rubrum in the Magellanic steppe are unique habitats due to their growth in acidic and nutrient-poor soils. The objective of this study was to describe the vegetation and environmental variables that characterize this type of environment. Significant differences were found between continental dwarf shrubs and those located northeast of Tierra del Fuego Island in terms of species richness and diversity. Despite apparent erosion, the proportion of native species was higher than that of introduced species. The dominant growth habit in terms of coverage were the dwarf dwarf shrublands of E. rubrum on the continent and those of Baccharis magellanica on Tierra del Fuego Island. Seven lichens were also found in the dwarf shrubs. The dominant life form were hemicryptophytes or perennial herbs, indicating that these shrublands are not under severe anthropogenic pressure, but do have high levels of erosion, which are likely the result of past overgrazing. The physical and chemical soil properties analyzed, which showed significant differences between the dwarf shrubs, were N-NO3, Mg, K, Na, CICE, and silt. On the other hand, Canonical Correspondence Analysis (CCA) revealed an important soil gradient, where pH and organic matter, along with the content of macronutrients (N, P, K), determine differences between the dwarf shrubs. Finally, it is recommended to pay more attention to the management and conservation of these shrublands, considering that they may be affected by anthropogenic management such as grazing, mining interventions, and water deficit, as has occurred in the northern hemisphere where they have left the soil bare.
       
  • Dinámica de la cubierta vegetal en pastizales nativos de la estepa
           Magallánica perturbados por la construcción de un ducto de hidrocarburo,
           Chile

    • Abstract: RESUMEN: La instalación de tuberías subterráneas es una infraestructura necesaria para la conexión de la matriz energética en la mayoría de los países. Sin embargo, se desconoce en detalle cuáles son los cambios de la composición a largo plazo y la estructura temporal de la cubierta vegetal, así como los efectos sobre la biodiversidad en ecosistemas áridos en la estepa magallánica. Para mitigar esto, se propone evaluar la recuperación de la cubierta vegetal un pastizal nativo (coironal) que forma parte de estos ecosistemas. El objetivo del estudio es identificar los efectos producidos por la instalación de un ducto de hidrocarburos con el método de elevación doble y posterior de revegetación con siembra de una mezcla de semillas agronómicas, sobre la composición, estructura y diversidad en comparación con un pastizal no perturbado adyacente (sitios de referencia) durante un periodo de 7 años. Se estudió el área del Bloque Coirón, en las cumbres de San Gregorio, región de Magallanes, Chile. Se identificaron 28 taxones en el área modificada por el ducto y 39 en la vegetación de referencia. La biodiversidad fue mayor en la vegetación de referencia en comparación al ducto, donde se observó una disminución del número de especies y porcentaje de cobertura. El análisis de Componentes Principales (PCA) y el análisis SIMPER permitieron identificar cuales especies contribuyeron más significativamente a la similitud dentro de cada grupo. Los resultados mostraron que se necesitan al menos 7 años para recuperar las áreas intervenidas por la instalación de un ducto de hidrocarburos y que la presión del pastoreo y eventos climáticos como el déficit hídrico, pueden estar interfiriendo en la recuperación de la cubierta vegetal.ABSTRACT: The installation of underground pipelines is necessary infrastructure for connecting the energy matrix in most countries. However, detailed knowledge about the long-term changes in vegetation composition and temporal structure, as well as the effects on biodiversity in arid ecosystems like the Magellanic steppe, remains unknown. To address this, the recovery of vegetation cover in a native grassland (coironal) that is part of these ecosystems is proposed to be evaluated. The study aims to identify the effects produced by the installation of a hydrocarbon pipeline using the double-lift method and subsequent re-vegetation with sowing of an agronomic seed mix, comparing it with an adjacent undisturbed grassland (reference sites) over a period of 7 years. The study area was the Coirón Block, located in the summits of San Gregorio, Magallanes region, Chile. A total of 28 taxa were identified in the area affected by the pipeline, while 39 taxa were found in the reference vegetation. Biodiversity was higher in the reference vegetation compared to the pipeline area, where a decrease in the number of species and percentage of coverage was observed. Principal Component Analysis (PCA) and SIMPER analysis allowed for the identification of the species that contributed most significantly to the similarity within each group. The results showed that at least 7 years are needed to recover the areas intervened by the installation of a hydrocarbon pipeline and that grazing pressure and climatic events such as water deficit may be interfering with vegetation recovery.
       
  • Humedales costeros en mares interiores de Isla Grande de Chiloé y Golfo
           de Reloncaví, Región de Los Lagos, Chile: comparación de flora,
           vegetación y degradación antrópica

    • Abstract: RESUMEN: Con metodologías de sistemática tradicional, fitosociológica y estadística multivariada se comparó la flora y la vegetación de tres humedales costeros de mares interiores: Huildad y Putemum en la isla grande de Chiloé y Quillaipe en el Golfo de Reloncaví, en la Región de Los Lagos, en el Sur de Chile. La flora total de ellos está formada por 91 especies de las cuales, 75 son nativas y 16 introducidas. También a ella pertenecen 62 Dicotiledóneas, 20 Monocotiledóneas y 9 Pteridófitos. En el espectro biológico dominan plantas leñosas y hierbas perennes. Cincuenta y seis especies son terrestres, 26 palustres, 5 epifíticas, 2 psamófitas y 3 plantas acuáticas (hidrófitos). Setenta especies son de ambientes no salinos, 16 son halófilos y 5 indiferentes. Helechos se encontraron sólo en Chiloé, con una mayor extensión de vegetación boscosa. Las especies nativas disminuyen de sur a norte y las introducidas de norte a sur, de la misma manera se comportan las plantas leñosas y las hierbas perennes. Sólo en Quillaipe abundaron los helófitos (plantas palustres) y caméfitos de marismas. Se presentó una correlación negativa entre número de habitantes de la ciudad más cercana con el número de especies presentes. La similitud florística entre humedales es muy baja. Se distinguieron 5 formaciones vegetales: bosques, matorrales, praderas, arroyos dulciacuícolas y marismas. En los tres humedales se presentaron en total 16 asociaciones vegetales de las cuales sólo 2 son comunes a ellos, por lo que también se presentó baja similitud vegetacional. Once asociaciones son primarias, 4 secundarias y 1 terciaria (matorral de Ulex europaeus). En general, los humedales estudiados son menos diversos en flora y vegetación que los del mar abierto y de más al norte, en Chile.ABSTRACT: Using traditional systematic, phytosociological and multivariate statistical methods, the flora and vegetation of three coastal wetlands of the inland sea were compared: Huildad and Putemum on the big island of Chiloé and Quillaipe in the Gulf of Reloncaví, in Los Lagos Region, Southern Chile. The total flora was composed by 91 plant species, of which 75 of which were native and 16 introduced. From the total also 62 correspond to Dicots, 20 Monocots and 9 Pteridophytes. Woody plants and perennial herbs dominated the biological spectrum. Fifty-six species were terrestrial, 26 marshy, 5 epiphytic, 2 psamophytes and 3 aquatic plants. Seventy species are from non-saline environments, 16 are halophytes and 5 are indifferent. Ferns were found only in Chiloé, with a greater extension of forest vegetation. Native species decrease from South to North and introduced species from North to South, in the same way of woody plants and perennial herbs. Only in Quillaipe helophytes and marsh camephytes were abundant. There was a negative correlation between the number of inhabitants of the nearest city and the number of plant species. The floristic similarity between wetlands was very low. Five plant formations were distinguished: forests, scrubs, prairie, freshwater streams and marshes. In the three wetlands, a total of 16 plant associations were identified, with only 2 common to them, so there was also a low vegetation similarity. Eleven associations were primary, 4 secondary and 1 tertiary (Ulexeuropaeusscrub). In general, the wetlands studied are less diverse in flora and vegetation than those in the open sea and further north, in Chile.
       
  • Edward Osborne Wilson (1929-2021)

    • Abstract: RESUMEN: Con metodologías de sistemática tradicional, fitosociológica y estadística multivariada se comparó la flora y la vegetación de tres humedales costeros de mares interiores: Huildad y Putemum en la isla grande de Chiloé y Quillaipe en el Golfo de Reloncaví, en la Región de Los Lagos, en el Sur de Chile. La flora total de ellos está formada por 91 especies de las cuales, 75 son nativas y 16 introducidas. También a ella pertenecen 62 Dicotiledóneas, 20 Monocotiledóneas y 9 Pteridófitos. En el espectro biológico dominan plantas leñosas y hierbas perennes. Cincuenta y seis especies son terrestres, 26 palustres, 5 epifíticas, 2 psamófitas y 3 plantas acuáticas (hidrófitos). Setenta especies son de ambientes no salinos, 16 son halófilos y 5 indiferentes. Helechos se encontraron sólo en Chiloé, con una mayor extensión de vegetación boscosa. Las especies nativas disminuyen de sur a norte y las introducidas de norte a sur, de la misma manera se comportan las plantas leñosas y las hierbas perennes. Sólo en Quillaipe abundaron los helófitos (plantas palustres) y caméfitos de marismas. Se presentó una correlación negativa entre número de habitantes de la ciudad más cercana con el número de especies presentes. La similitud florística entre humedales es muy baja. Se distinguieron 5 formaciones vegetales: bosques, matorrales, praderas, arroyos dulciacuícolas y marismas. En los tres humedales se presentaron en total 16 asociaciones vegetales de las cuales sólo 2 son comunes a ellos, por lo que también se presentó baja similitud vegetacional. Once asociaciones son primarias, 4 secundarias y 1 terciaria (matorral de Ulex europaeus). En general, los humedales estudiados son menos diversos en flora y vegetación que los del mar abierto y de más al norte, en Chile.ABSTRACT: Using traditional systematic, phytosociological and multivariate statistical methods, the flora and vegetation of three coastal wetlands of the inland sea were compared: Huildad and Putemum on the big island of Chiloé and Quillaipe in the Gulf of Reloncaví, in Los Lagos Region, Southern Chile. The total flora was composed by 91 plant species, of which 75 of which were native and 16 introduced. From the total also 62 correspond to Dicots, 20 Monocots and 9 Pteridophytes. Woody plants and perennial herbs dominated the biological spectrum. Fifty-six species were terrestrial, 26 marshy, 5 epiphytic, 2 psamophytes and 3 aquatic plants. Seventy species are from non-saline environments, 16 are halophytes and 5 are indifferent. Ferns were found only in Chiloé, with a greater extension of forest vegetation. Native species decrease from South to North and introduced species from North to South, in the same way of woody plants and perennial herbs. Only in Quillaipe helophytes and marsh camephytes were abundant. There was a negative correlation between the number of inhabitants of the nearest city and the number of plant species. The floristic similarity between wetlands was very low. Five plant formations were distinguished: forests, scrubs, prairie, freshwater streams and marshes. In the three wetlands, a total of 16 plant associations were identified, with only 2 common to them, so there was also a low vegetation similarity. Eleven associations were primary, 4 secondary and 1 tertiary (Ulexeuropaeusscrub). In general, the wetlands studied are less diverse in flora and vegetation than those in the open sea and further north, in Chile.
       
 
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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 1)
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 19)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 2)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 16)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 18)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 7)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 12)
American Academic & Scholarly Research Journal     Open Access   (Followers: 4)
American Journal of Applied Sciences     Open Access   (Followers: 22)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 13)
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 1)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 2)
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 5)
Archives of Current Research International     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 1)
ARPHA Proceedings     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Asian Journal of Scientific Research     Open Access   (Followers: 2)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Australian Field Ornithology     Full-text available via subscription   (Followers: 1)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 6)
Avrasya Terim Dergisi     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 11)
BIBECHANA     Open Access  
Bilge International Journal of Science and Technology Research     Open Access  
Bioethics Research Notes     Full-text available via subscription   (Followers: 15)
BJHS Themes     Open Access   (Followers: 2)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia Amazónica (Iquitos)     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Citizen Science : Theory and Practice     Open Access   (Followers: 3)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comunicata Scientiae     Open Access  
ConCiencia     Open Access  
Conference Papers in Science     Open Access  
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access  
Cuadernos de Investigación UNED     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 26)
Current Research in Geoscience     Open Access   (Followers: 6)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 4)
Data Curation Profiles Directory     Open Access   (Followers: 9)
Dhaka University Journal of Science     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Discover Sustainability     Open Access   (Followers: 5)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 7)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Epiphany     Open Access   (Followers: 1)
Estação Científica (UNIFAP)     Open Access  
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 5)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 7)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 2)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access   (Followers: 1)
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 245)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 5)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Gaudium Sciendi     Open Access  
Gazi University Journal of Science     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access   (Followers: 1)
Himalayan Journal of Science and Technology     Open Access  
History of Science and Technology     Open Access   (Followers: 5)
Hoosier Science Teacher     Open Access  
Impact     Open Access   (Followers: 1)
Indian Journal of History of Science     Hybrid Journal   (Followers: 3)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access  
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Culture and Modernity     Open Access   (Followers: 6)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 4)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
International Journal of Research in Science     Open Access   (Followers: 1)
International Journal of Social Sciences and Management     Open Access   (Followers: 2)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 10)
International Letters of Social and Humanistic Sciences     Open Access  
International Science and Technology Journal of Namibia     Open Access   (Followers: 1)
International Scientific and Vocational Studies Journal     Open Access  
InterSciencePlace     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 8)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 2)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
Journal of Advanced Research     Open Access   (Followers: 2)
Journal of Al-Qadisiyah for Pure Science     Open Access  
Journal of Alasmarya University     Open Access   (Followers: 3)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Big History     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Diversity Management     Open Access   (Followers: 4)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of Integrated Science and Technology     Open Access  
Journal of King Saud University - Science     Open Access  
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Natural Sciences Research     Open Access   (Followers: 2)
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access  
Journal of Science (JSc)     Open Access  
Journal of Science and Engineering     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science and Technology Policy Management     Hybrid Journal   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Science of the University of Kelaniya Sri Lanka     Open Access  
Journal of Scientific Research     Open Access   (Followers: 1)
Journal of Scientific Research and Reports     Open Access   (Followers: 1)
Journal of Scientometric Research     Open Access   (Followers: 22)
Journal of Shanghai Jiaotong University (Science)     Hybrid Journal  
Journal of Social Science Research     Open Access   (Followers: 2)
Journal of Taibah University for Science     Open Access  
Journal of the Asiatic Society of Bangladesh, Science     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the History of Ideas     Full-text available via subscription   (Followers: 167)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of the National Science Foundation of Sri Lanka     Open Access  
Journal of the Royal Society of New Zealand     Hybrid Journal   (Followers: 49)
Journal of the South Carolina Academy of Science     Open Access  
Journal of Unsolved Questions     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  

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