Artículos científicos: Envíos recientes
Mostrando ítems 21-40 de 282
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Above- and belowground nutrients storage and biomass accumulation in marginal Nothofagus antarctica forests in Southern Patagonia
(Elsevier, 2008-04-20)The above- and belowground biomass and nutrient content (N, P, K, Ca, S and Mg) of pure deciduous Nothofagus antarctica (Forster f.) Oersted stands grown in a marginal site and aged from 8 to 180 years were measured in ... -
Flowering and seeding patterns in unmanaged and managed Nothofagus pumilio south Patagonian forests
(Verlag M. und H. Schaper GmbH, 2008)Regeneration is the success key for the silvicultural treatment implemented in natural seed produced forests. Most of the studies assumed that regeneration is limited by environmental factors and herbivory, but few considered ... -
Towards a physical description of habitat: quantifying environmental adversity (abiotic stress) in temperate forest and woodland ecosystems
(Wiley, 2009-08-11)1. Our aim was to develop a quantitative proxy for environmental adversity (abiotic stress) in temperate Eucalyptus and Nothofagus forest and woodland ecosystems. 2. Samples and measurements were collected at 42 sites ... -
Timber management with variable retention in Nothofagus pumilio forests of Southern Patagonia
(Elsevier, 2009-07-30)Forestry practices integrating ecological and social criteria have been replacing those based only on economic values. Traditional silviculture, such as shelterwood cuts (SC), transforms uneven-aged original stands to an ... -
Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
(Czech Academy of Agricultural Sciences, 2009-03-31)Net photosynthetic rate (A) and stomatal conductance (gs) of leaves of Nothofagus pumilio and N. antarctica seedlings were measured at different photosynthetic photon flux densities (PPFDs, 20, 150, 250, 500, 750, 1,000, ... -
A new species of Aphis L. (Hemiptera: Aphididae) from South Patagonia = Una Nueva Especie de Aphis L. (Hemiptera: Aphididae) del Sur de la Patagonia
(Sociedade Entomológica do Brasil, 2009-07-13)Aphis adesmiae Delfino sp. n. se describe del sur de la Patagonia (Argentina). Esta nueva especie de áfido está asociada con el arbusto nativo Adesmia boronioides (Fabaceae). Los caracteres morfológicos de la hembra vivípara ... -
Investigación sobre manejo forestal a largo plazo en Patagonia Sur - Argentina: Lecciones del pasado, desafíos del presente = Long-term forest management research in South Patagonia - Argentina: Lessons from the past, challenges from the present
(Sociedad de Biología de Chile, 2010-02-05)Argentina ha basado su economía en la agricultura y el ganado, donde el bosque ha sido visto como un obstáculo para el desarrollo. La cosecha forestal en Patagonia Sur ha sido una actividad basada en la colonización y ... -
Caracterización espacio-temporal de las sequías meteorológicas en Santa Cruz en el contexto de cambio climático = Spatio-temporal characterization of meteorological droughts in Santa Cruz in the context of climate change
(Centro Argentino de Meteorólogos, 2025-06-26)Las sequías son un fenómeno de escala regional que afecta la seguridad alimentaria, la provisión de agua y energía, cuya severidad, duración y frecuencia se espera aumenten en un contexto de cambio climático. En el presente ... -
Biomass allocation and resource use strategies of shrubs and dwarf shrubs in Southern Patagonia: implications for developing a natural capital accounting framework
(Elsevier, 2025-06)In situ measurements were made to gain insight into resource use strategies of the perennial flora of cold arid steppe in Southern Patagonia. We measured biomass allocation and nutrient concentration in 3 tall shrub and 3 ... -
Water quality assessment of streams and rivers for irrigation in Southern Continental Patagonia = Evaluación de la calidad del agua para irrigación en ríos y arroyos de la Patagonia Austral Continental
(Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, 2025-06-23)This work aimed to analyze and classify the suitability of freshwater sources for irrigation in three large hydrographic regions of Southern Continental Patagonia: Coyle, Serrano, and Gallegos. In these regions, there is ... -
Mycorrhizal symbioses and tree diversity in global forest communities
(American Association for the Advancement of Science., 2025-06-13)Unraveling the mechanisms underlying the maintenance of species diversity is a central pursuit in ecology. It has been hypothesized that ectomycorrhizal (EcM) in contrast to arbuscular mycorrhizal fungi can reduce tree ... -
Dominant species predict plant richness and biomass in global grasslands
(Springer Nature, 2025-06)The bidirectional relationship between plant species richness and community biomass is often variable and poorly resolved in natural grassland ecosystems, impeding progress in predicting impacts of environmental changes. ... -
Aridity modulates grassland biomass responses to combined drought and nutrient addition
(Springer Nature, 2025-05-19)Plant biomass tends to increase under nutrient addition and decrease under drought. Biotic and abiotic factors influence responses to both, making the combined impact of nutrient addition and drought difficult to predict. ... -
Is there a relationship between the concentration of nutrients in leaves and the class of site where Nothofagus antarctica forests growth in southern Patagonia, Argentina? = ¿Existe relación entre la concentración de nutrientes en hojas con la clase sitio donde se desarrollan los bosques de Nothofagus antarctica en Patagonia sur, Argentina?
(Universidad Austral de Chile, 2025-06)The objective of this study was to determine whether differences in site quality correlate with better leaf nutritional status in pure Nothofagus antarctica (ñire) forests. Nine pure ñire stands of the three site classes ... -
The global spectrum of tree crown architecture
(Springer Nature, 2025-05-26)Trees can differ enormously in their crown architectural traits, such as the scaling relationships between tree height, crown width and stem diameter. Yet despite the importance of crown architecture in shaping the structure ... -
Experiencia de pastoreo ovino de pasturas de gramíneas introducidas en Patagonia Austral, Argentina = Experience of sheep grazing on introduced grass pastures in Southern Patagonia, Argentina = Experiência com pastoreio de ovelhas em pastagens de gramíneas introduzidas na Patagônia Sul, Argentina
(Universidad Cooperativa de Colombia, 2025-05)Introducción: la ganadería ovina en Patagonia Austral se sustenta en el aprovechamiento extensivo de los pastizales naturales en un escenario donde la productividad del pastizal acompaña la variabilidad de las condiciones ... -
Local nutrient addition drives plant biodiversity losses but not biotic homogenization in global grasslands
(Springer Nature, 2025-05-27)Nutrient enrichment typically causes local plant diversity declines. A common but untested expectation is that nutrient enrichment also reduces variation in nutrient conditions among localities and selects for a smaller ... -
Effect of climate on traits of dominant and rare tree species in the world’s forests
(Springer Nature, 2025-05-22)Species’ traits and environmental conditions determine the abundance of tree species across the globe. The extent to which traits of dominant and rare tree species differ remains untested across a broad environmental range, ... -
Global impoverishment of natural vegetation revealed by dark diversity
(Springer Nature, 2025-05-23)Anthropogenic biodiversity decline threatens the functioning of ecosystems and the many benefits they provide to humanity1. As well as causing species losses in directly affected locations, human influence might also reduce ... -
Demography of Grazed Tussock Grass Populations in Patagonia
(Elsevier, 2005-09)The cover of Festuca gracillima (coirón fueguino), a native tussock grass that dominates grass steppes of Southern Patagonia and Tierra del Fuego, has diminished under continuous sheep grazing. This loss is a concern, ...