Juan F. Goya

• National University of La Plata

El objetivo de este trabajo es actualizar y mejorar la cartografía existente sobre la distribución espacial de los bosques nativos de la provincia de Buenos Aires. Se desarrolló en el marco de un proyecto de transferencia ejecutado por investigadores del sistema científico tecnológico nacional para la Dirección de Bosques del Ministerio de Ambiente...

Tree plantations can facilitate the establishment of native trees, thus providing opportunities for the ecological restoration or rehabilitation of degraded forest lands. Stand variables can influence the establishment of native tree species, but few studies have been carried out to determine how sapling growth response to stand variables varies am...

Many trees of high timber value require canopy cover to become established, and at present, they are only harvested from native rainforests. Other species require high radiation to establish and can be planted in monospecific stands. The main question was whether the canopy generated by a light-demanding rainforest species could protect mid-success...

Los retos a los que se enfrenta en la actualidad la formación deposgrado y la gestión forestal de calidad son muy relevantes por la ocurrencia y magnitud de problemas ambientales globales (cambio climático, especies invasoras y pérdida de la biodiversidad), así como por la demanda creciente de bienes y servicios ecosistémicos por la sociedad, para...

The establishment of native trees in exotic forest plantations can improve economic and ecological outcomes, and functional traits can help understanding differential responses of growth rates to stand variables. It is well known that growth rates can depend on functional traits and that the associations between functional traits and plant growth v...

The management of plantations of the critically endangered species Araucaria angustifolia (Bertol.) Kuntze can be an opportunity to mitigate the loss of local biodiversity and to contribute to wood production and Atlantic Forest conservation. Timber species that require canopy protection can be interplanted to convert monospecific stands in uneven-...

Atlantic Forest broad-leaved trees of high timber value require canopy cover to become established. Therefore, at present, they are only harvested from native rainforests. Araucaria angustifolia (Bertol.) Kuntze is the only Atlantic Forest Gymnosperm; it requires high radiation to establish and is planted in monospecific stands. The main question w...

En el este de la provincia de Buenos Aires, la explotación minera de los materiales calcáreos del subsuelo provoca la pérdida de cobertura de bosques nativos dominados por Celtis tala, una de las principales formaciones boscosas de la región. El objetivo de este estudio fue evaluar técnicas de plantación de tala en áreas de canteras de conchilla ab...

La Selva Misionera forma parte de una de las ecorregiones más amenazadas a nivel mundial. Para conservar una superficie representativa de estos bosques subtropicales es necesario manejarlos de manera sostenible y reducir la deforestación y fragmentación. La mayor parte de la superficie boscosa se encuentra degradada. La explotación comercial de las...

Deforestation is a global process that has strongly affected the Atlantic Forest in South America, which has been recognised as a threatened biodiversity hotspot. An important proportion of deforested areas were converted to forest plantations. Araucaria angustifolia is a native tree to the Atlantic Forest, which has been largely exploited for wood...

La actividad forestal en los bosques nativos de Argentina se ha caracterizado por ser altamente extractiva y selectiva, ocasionando una perdida de diversidad asociada a estos recursos. Especies como algarrobo blanco, araucaria o peteribí son relevantes, particularmente en las ecorregiones de Parque Chaqueño y Selva Paranaense, por sus característic...

PALABRAS CLAVE: Bosques mixtos, Modelos de crecimiento, Índices de competencia. Objetivo general: Analizar la aplicabilidad de modelos de crecimiento y rendimiento para la simulación de una silvicultura de bosques mixtos de Araucaria angustifolia combinada con especies nativas establecidas bajo su dosel. Brindar herramientas y pautas de manejo de b...

The interest in the conservation of biodiversity in productive ecosystems has increased considerably in recent years due to the continuing loss of natural vegetation. The effect of forest plantations on biodiversity is currently a relevant research topic since they are expanding worldwide. Native understory vegetation may maintain ecosystem process...

The expansion of fast-growing tree plantations is a worldwide process, with consequences on soil fertility and soil carbon storage. Disparate results were found on the effects of afforestation with Eucalyptus on soil carbon and other nutrient contents. These discrepancies are usually caused by differences in climate, land use history, soil texture...

Los bosques tropicales y subtropicales se caracterizan por ser ambientes lumínicos muy heterogéneos. En estos ecosistemas la caída de árboles del estrato superior, genera aper-turas del dosel (claros) que permiten la llegada de luz solar directa al sotobosque, confor-mando un recurso importante para la vida de muchas especies. En formaciones mixtas...

Forest plantations in Argentina are mainly established for commercial purposes although, under specific management conditions, they can yield diverse ecosystem services. The silviculture for mixed stands focuses on diverse commercial products as well as on increasing resources use efficiency, biodiversity and ecosystem services. Natural regeneratio...

Introducción En la ecorregión del Bosque atlántico, las plantaciones de Araucaria angustifolia (Ber-tol.) Kuntze albergarían mayor diversidad fun-cional y de servicios ecosistémicos comparadas con plantaciones de Pinus sp. o Eucaliptus sp. (Fonseca et al., 2009). La regeneración natural (RN) de especies arbóreas en plantaciones de A. angustifolia s...

Las plantaciones mixtas con especies nativas son ambientalmente preferibles a las plantaciones mono-específicas. En rodales mixtos se generan interacciones entre los individuos, que pueden incidir negativa o positivamente sobre su crecimiento o mortalidad. Las mezclas de especies pueden ser coetáneas o disetáneas, estas últimas permiten incorporar...

Las plantaciones mixtas con especies nativas son ambientalmente preferibles a las plantaciones mono-específicas. En rodales mixtos se generan interacciones entre los individuos, que pueden incidir negativa o positivamente sobre su crecimiento o mortalidad. Las mezclas de especies pueden ser coetáneas o disetáneas, estas últimas permiten incorporar...

The establishment of alien plants in native ecosystems promotes biodiversity loss and impacts on ecological processes. Reverting that situation may require the remotion of alien species and the plantation of native species. Ligustrum lucidum is a common invasive tree in temperate and subtropical forests in Argentina. This species causes a high incr...

The establishment of alien plants in native ecosystems promotes biodiversity loss and impacts on ecological processes. Reverting that situation may require the remotion of alien species and the plantation of native species. Ligustrum lucidum is a common invasive tree in temperate and subtropical forests in Argentina. This species causes a high incr...

The Argentinian Mesopotamia is the core of fast-growing tree species plantations of the country. Eucalyptus grandis plantations constitute 90 % of the forested area with Eucalyptus spp. in NE Entre Rios. Based on previous studies on structural and functional features, a comprehensive model is here proposed on emergence of new properties linked to m...

Se simuló el efecto de diferentes escenarios de cosecha sobre la estabilidad nutritiva del potasio (K), magnesio (Mg) y calcio (Ca) en un rodal de Araucaria angustifolia, de 27 años de edad; localizado en el noroeste de Misiones, Argentina. Se estimó el contenido de K, Mg y Ca, de los estratos arbóreo, sotobosque, piso forestal y suelo; y se simula...

Aim of study: The objective of this study was to analyze the stand structure and spatial pattern of two A. chilensis stands with contrasting soil conditions and different site qualities in order to explore if these differences lead to patterns similar to the ones observed under different precipitation conditions. Area of study: The study was carrie...

La provincia de Entre Ríos es un núcleo importante de plantaciones de Eucalyptus spp. en Argentina. Se planteó como hipótesis que con el aumento en la edad de las plantaciones aumenta la biomasa de raíces finas y la masa del mantillo. Se muestrearon rodales de cinco, siete y diecisiete años de edad de Eucalyptus grandis, de primera rotación. Se est...

Se trabajó en un rodal de Araucaria angustifolia de 40 años de edad, localizado en el noreste de Misiones, con el objetivo de simular el efecto de diferentes escenarios de cosecha en la tala rasa sobre la estabilidad nutritiva del N y P del sistema. Se muestreó, por compartimiento, los estratos arbóreo, sotobosque, piso y suelo, y se extrajeron alí...

The relationship between the height growth, foliar concentrations of nitrogen (N) and phosphorus (P), and the N:P ratio was analyzed in a fourth rotation plantation that did not respond to fertilization with these nutrients. Spearman's nonparametric correlation analysis was used to evaluate the association between growth in height—calculated as the...

The aim of this work was to evaluate the effect of N and P fertilization during Pinus taeda L. establishment on a poorly developed stony soil found in slopes in Misiones. Total Height and collar diameter growth in response to different N and P doses were evaluated, six and eighteen months after fertilization. . Different responses depending on the...

Se estimó el contenido de nitrógeno y fósforo de tres plantaciones experimentales de Araucaria angustifolia (Bert) O. Ktze de 20, 30 y 40 años, en el norte de la provincia de Misiones, Argentina. La biomasa total y el contenido de nutrientes acumulados en el estrato arbóreo se relacionaron positivamente con el incremento de la edad. El N y P acumul...

ABSTRACT The effect on soil productivity of harvesting forestry products deserved special attention in last years. Consequently, it is necessary to establish quantitative indices of environmental and economic impact for the different management stages. The decision of planting forestry trees is dependent on financial indicators; high costs may cha...

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Decomposition and nutrient release from leaf litter in Eucalyptus grandis plantations on three different soils in Entre Ríos, Argentina Descomposición y mineralización de la hojarasca foliar en plantaciones de Eucalyptus grandis en tres tipos diferentes de suelos en Entre Ríos, Argentina SUMMARY The decay of organic matter returned to the soil via...

La descomposición de la materia orgánica que ingresa al suelo a través de la caída a la hojarasca es una fuente importante de nutrientes para la vegetación. Se estimaron la tasa de descomposición de la materia orgánica, la liberación/inmovilización de nitrógeno, fósforo, potasio, calcio, magnesio, manganeso, hierro y aluminio de hojas recién caídas...

Eucalyptus plantations represent an important forest area in NE Argentina, with 140 000 hectares covered with Eucalyptus grandis (Hill ex Maiden). Plantations in this area have high mean annual increments (30-40 m³.ha-1 año-1) and high total productivity (220-370 Mg. ha-1) although they are established on sandy soils. These soils have low organic m...

Nitrogen (N) and phosphorus (P) are the nutrients that most commonly limit tree growth. Interactions between fertilization and soil type are well known, and in soils with moderate or low N availability, N-fertilization is frequently recommended to improve tree nutrition. The aim of this paper was to analyze how different doses of P and N applied in...

Aboveground net primary productivity (ANPP), nutrient cycling and nutrient use efficiency (NUE) were estimated for three 20 years-old Pinus taeda L. experimental plantations in the north of the Misiones province, Argentina. ANPP was 34.8 ±L5Mg·ha-1·yr-1 and litterfall was 16 ±1.1Mg·ha-1·yr-1. Mean annual bole increment was 20% higher than the mean...

Se estimó la productividad primaria aérea neta (PPAN), ciclado y eficiencia del uso de nutrientes (EUN) de 3 plantaciones experimentales de Pinus taeda L. de 20 años, del norte de la provincia de Misiones, Argentina. La PPAN fue 34,8 ±1,5Mg·ha-1·año-1 y la caída al mantillo, 16 ±1,1Mg·ha-1·año-1. El incremento medio anual del fuste fue 20% mayor qu...

We determined whether fertilization with N and P affects water relations, and thereby water-stress tolerance, in young Eucalyptus grandis plants. To assess whether fertilization enhances osmotic adjustment under drought, 3-month-old E. grandis were planted in pots and fertilized with either N (I a of urea) or P (12 - of calcium superphosphate). The...

Water and nutrients are two of the most important factors controlling the growth of trees. Numerous studies show that fertilization is most effective when trees are not water-stressed and that irrigation is most effective when nutrients are not scarce. The goal of this work was to test the responses of Eucalyptus grandis seedlings to drought as aff...

Decomposition constant of fallen leaves, thin (< 1 cm diameter) and coarse (1-5 cm) branches and stems (> 5 cm) were determined in mature stands of Austrocedrus chilensis. Leaves and branches were field-incubated (522 days) using litter bags while a chronosequence of stems was employed. Foliar decay rate k did not show significant differences among...

El presente estudio se llevó a cabo en plantaciones de Araucaria angustifolia de tres clases de edad, definidas entre 20-25, 30-35 y 40-45 años, localizadas en el norte de la Provincia de Misiones. Se ajustaron tres ecuaciones para determinar el peso seco de los diferentes compartimentos de la parte aérea de los árboles. Se estimó la biomasa por he...

Summary The present study was carried out in three Araucaria angustifolia plantations of different age class defined in 20-25, 30-35 and 40-45 years old in northern Misiones. Three equations for dry weight estimation of tree aboveground components were fitted. The biomass per-hectare was estimated by applying the selected equations to each tree of...

RESUMEN. Se fertilizaron con superfosfato triple plantines de Eucalyptus globulus plantados en macetas que contenían tres tipos de suelo con características físicas y químicas diferentes: un suelo franco, un suelo arcilloso y un suelo arenoso. Las dosis aplicadas fueron de 0, 6, 12 y 24 g de fertilizante por planta, correspondientes a 0, 2.76, 5.52...

Eucalyptus globulus seedlings were transplanted in pots filled with three types of soils with different physical and chemical properties: a sandy soil, a clay soil and a loamy soil. These soil types are frequently used to plant eucalyptus with high productivity. All treatments were daily watered and phosphorus was applied at the time of planting as...

SUMMARY The work was conducted in 20, 29 and 40 year old Araucaria angustifolia plantations in northern Misiones. The biomass and necromass of different compartments that actuate as nutrient reservoirs have been determined: a) plantation aerial biomass, cutting 27 trees, 9 of each age, b) bush and herbaceous undergrowth, dividing the first of them...

Impacto de la cosecha y destino de los residuos sobre la estabilidad del capital de nutrientes en plantaciones de Pinus taeda L. ecosistema (nutrientes exportados/nutrientes del suelo): (1) cosecha de productos comerciales (fustes con corteza hasta 5 cm de diámetro) y conservación de los residuos, (2) cosecha y retiro de todo el material aéreo prod...

This paper reports on the aboveground nutrient content at rotation time in Pinus taeda plantations of northern Misiones province, and assess the impact of three simulated harvest strategies on nutrient stability (exported nutrients/nutrients in soil): (1) harvest of marketable products (stems with bark up to 5 cm diameter) and slash abandonment on...

Productive and environmental conditions in slash and burn agricultural systems are improved by net atmospheric carbon accumulation in the vegetation and soil through succession. Carbon content and accumulation rates in the aboveground biomass, fine litter and topsoil in abandoned annual crops, were evaluated in this study. Logistic growth models we...

Stands of Subtropical Montane Cloud Forest were studied in areas under different land use regimes near Los Toldos (NW Argentina). Circular plots were used to calculate density and basal area of trees with dbh > 10 cm; and density of trees with dbh < 10 cm. The stands were classified and grouped as a function of basal area. Five structures were reco...

Stands of Subtropical Montane Cloud Forest were studied in areas under different land use regimes near Los Toldos (NW Argentina). Circular plots were used to calculate density and basal area of trees with dbh > 10 cm; and density of trees with dbh < 10 cm. The stands were classified and grouped as a function of basal area. Five structures were reco...

La acumulación neta de carbono atmosférico en la vegetación y suelo a través de la sucesión tiene relevancia para la mejora de las condiciones productivas y ambientales. El objetivo de este estudio fue evaluar el contenido y tasas de almacenamiento del carbono en la biomasa aérea, mantillo y parte superior del suelo mineral, en diferentes etapas de...

El efecto de la competencia se refleja en la reducción del crecimiento de los individuos que se encuentran en una situación competitiva más desfavorable. El conocimiento de esos procesos es utilizable en el manejo para optimizar las condiciones de crecimiento. Se estudió la competencia entre cohortes en un bosque de Celtis tala regenerado por rebro...

El objetivo de este trabajo fue determinar la biomasa y la productividad de un bosque puro de Austrocedrus chilensis y analizar los efectos de las diferencias estructurales sobre el rendimiento de productos comerciales. Los rodales estudiados son bosques secundarios ubicados en la Reserva Forestal Loma del Medio-Río Azul en la localidad de El Bolsó...

We analyzed the relationships among the type of canopy in Austrocedrus chilensis forests, the density of saplings (individuals <5 cm DBH) and their spatial trends. We classified saplings into three height classes (0.5-1 m, 1-2 m, and >2 m), and we measured its densities in two sites, each one corresponding to a protected area (El Guadal and Loma de...

SUMMARY The relationship between net primary productivity in Pinus taeda plantations and foliar nutrient concentrations during the productive cycle was investigated. Three different ages were considered from 7 to 21 years of the plantation. Foliar concentrations were compa- red between these ages. Nutrient concentrations were analysed between diffe...