Temas
Mostrando ítems 1-20 de 34
-
15N uptake and distribution in grasses growing under Nothofagus antarctica vs. grasses in an open site
(University of Copenhagen, 2017-08-21)In Argentinean Patagonia, there is an extensive area from 36º 30´ to 56º 00´SL where Nothofagus antarctica (ñire) native forests are distributed in a narrow strip being the main use as silvopastoral system. In these systems, ... -
Above- and below-ground nutrient tissue concentration and leaf pigment changes in Patagonian woody seedlings grown under light and soil moisture gradients
(Taylor & Francis, 2011-10-28)To understand the ecophysiology of natural regeneration above- and below-ground nutrient tissue concentration and leaf pigment changes in Nothofagus pumilio (lenga) seedlings grown in three light intensities (4%, 26% and ... -
Árboles y sotobosque en sistemas silvopastoriles de Ñire ¿competencia o facilitación por N?
(Ediciones INTA, 2012-05-09)Si bien los bosques de Nothofagus antarctica son ampliamente utilizados como sistemas silvopastoriles, existen escasos estudios que evalúen las interacciones existentes entre los componentes árboles y pastizal. En este ... -
BAAD: A biomass and allometry database for woody plants.
(Ecological Society of America, 2015-05-01)Understanding how plants are constructed—i.e., how key size dimensions and the amount of mass invested in different tissues varies among individuals—is essential for modeling plant growth, carbon stocks, and energy fluxes ... -
Biomasa y respiración microbiana : respuesta ante cambios en la humedad del suelo en la Estepa Magallánica Seca de Santa Cruz, Argentina
(Universidad Nacional de la Patagonia Austral (UNPA), 2020-11-17)El carbono y el nitrógeno de la biomasa microbiana (CBM y NBM) del suelo son bioindicadores que tienen el potencial de mostrar cambios en el suelo de los ecosistemas, y están condicionados por la humedad disponible en el ... -
Carbon (δ13C) and nitrogen (δ15N) stable isotope composition in plant and soil in Southern Patagonia’s native forests.
(Wiley, 2012-01)Stable isotope natural abundance measurements integrate across several biogeochemical processes in ecosystem N and C dynamics. Here, we report trends in natural isotope abundance (d13C and d15N in plant and soil) along a ... -
Changes in nutrient and fibre tissue contents in Nothofagus pumilio trees growing at site quality and crown class gradients
(Elsevier, 2022-02-01)Estimation of biomass and nutrient contents in tree components are essential for evaluating the impact of harvesting on carbon fixation capacity, bio-element recycling, and long-term effect on the balance that influence ... -
Climatic controls of decomposition drive the global biogeography of forest tree symbioses
(Springer Nature, 2019-05-15)The identity of the dominant root-associated microbial symbionts in a forest determines the ability of trees to access limiting nutrients from atmospheric or soil pools1,2, sequester carbon3,4 and withstand the effects of ... -
Convergence of soil nitrogen isotopes across global climate gradients
(2015-02-06)Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing. With limited ... -
Descomposición y liberación de nutrientes en raíces finas de ñire en Patagonia Sur.
(Ediciones INTA, 2018-10-31)La descomposición de raíces finas es un proceso fundamental relacionado al ciclo de carbono y nutrientes en los ecosistemas terrestres. A pesar de su importancia, estos procesos han sido escasamente estudiados en los bosques ... -
Dinámica y utilización del nitrógeno en el cultivo de cerezo dulce, Prunus avium L.
(Facultad de Agronomía, Universidad de Buenos Aires, 2010)No existen resultados concluyentes en cuanto al efecto del N en el rendimiento del cerezo, las características del fruto, la acumulación de reservas, o el riesgo de lixiviación de nitratos. Por ese motivo, se utiliza ... -
Dominant native and non‐native graminoids differ in key leaf traits irrespective of nutrient availability
(Wiley, 2020-03-12)Nutrient enrichment is associated with plant invasions and biodiversity loss. Functional trait advantages may predict the ascendancy of invasive plants following nutrient enrichment but this is rarely tested. Here, we ... -
Effects of Climate and Atmospheric Nitrogen Deposition on Early to Mid-Term Stage Litter Decomposition Across Biomes
(Frontiers Editorial, 2021-07-14)Litter decomposition is a key process for carbon and nutrient cycling in terrestrial ecosystems and is mainly controlled by environmental conditions, substrate quantity and quality as well as microbial community abundance ... -
Estudio de los microorganismos del suelo en ambientes de bosque y estepa en Santa Cruz: líneas de base y su respuesta a pastoreo y fertilización
(Universidad Nacional de la Patagonia Austral, 2018-10-09)En los ecosistemas terrestres, la descomposición de la materia orgánica es un importante proceso mediado por microorganismos que utilizan al material orgánico muerto como hábitat y fuente de carbono (C) y energía. Este ... -
Evaluación de los microorganismos del suelo en un pastizal de la Estepa Magallánica Seca ante cambios en nutrientes y régimen hídrico
(Universidad Nacional de la Patagonia Austral, 2020-10-19)Conocer cómo es la biología de estos suelos en cuanto a carbono (C) y nitrógeno (N) en los microorganismos da idea de la descomposición de la materia orgánica y por ende del ciclado de los nutrientes y puede servir de base ... -
Evaluación especies forrajeras como alternativa para incrementar la producción en sistemas silvopastoriles de ñire. Parte II: calidad del sotobosque vs. especies implantadas = Evaluation of pasture species to improve dry mater production in ñire´ssilvopastoral systems. Part II: Quality of natural understory vs. pastures
(CIPAV, 2023-10-15)Nothofagus antarctica, es la segunda especie en abundancia en la provincia de Santa Cruz y cerca del 70 % de estos bosques son utilizados como sistemas silvopastoriles (SSP). El objetivo de este trabajo fue evaluar la ... -
Foliar N⁄ P ratio and nutrient limitation to vegetation growth on Keerqin sandy grassland of North-east China.
(Wiley, 2011-02-01)To examine whether the critical leaf N ⁄ P ratios (of 14, 16) are valid to test nutrient limitation in the context of semi-arid sandy grasslands, an experiment was conducted on a Keerqin sandy grassland in North-east China ... -
General destabilizing effects of eutrophication on grassland productivity at multiple spatial scales
(Springer Nature, 2020-10-23)Eutrophication is a widespread environmental change that usually reduces the stabilizing effect of plant diversity on productivity in local communities. Whether this effect is scale dependent remains to be elucidated. Here, ... -
Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off
(Elsevier, 2021-03-09)We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously ... -
Litter decomposition and nutrients dynamics in Nothofagus antarctica forests under silvopastoral use in Southern Patagonia.
(Springer, 2012-01-24)The role of environmental variables on litter decomposition and its nutrient release in Nothofagus antarctica forest in Patagonia is poorly understood. Moreover, in these forests under silvopastoral use there are few ...