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March 1986 - present
November 2005 - October 2008
Publications
Publications (47)
In Argentina, near the Sierra de los Comechingones, the exotic tree P. halepensis has been used mainly as an ornamental garden tree for more than a century. However, a few years ago, scattered populations began to be observed on the slopes of the hills, which are growing rapidly. The objective of this study was to evaluate changes in the amount and...
La dinámica temporal de crecimiento en especies leñosas es información valiosa, adquiriendo importancia en un contexto de cambio climático. Eventos climáticos como sequías, olas de calor, heladas atemporales, entre otros quedan registradas en los anillos de crecimiento de las leñosas. Dendrocronología es una disciplina que analiza los anillos de cr...
El estado y la conservación de los recursos naturales comprometidos en los sistemas productivos son motivo de preocupación en todo el mundo. En la Argentina, la expansión de la frontera agrícola desde la Pampa Húmeda hacia el oeste ha intensificado la actividad ganadera en zonas semiáridas, disminuyendo la probabilidad de encontrar sitios que no es...
Chica (Ramorinoa girolae, Fabaceae) is an endemic species with a valuable ecological role in arid environments of Argentina, protecting watersheds and wildlife and providing food for humans. The aim of this study was to describe its woody anatomy, growth dynamics, recruitment and relation to climate. Samples from three sites were collected, and ana...
The arid and semi-arid areas in Argentina occupy more than the sixty
percent of the country. The genus Prosopis dominates these environments
with approximately 21 species. The driest part of the Argentinean Pampas
is dominated by caldén (Prosopis caldenia) forests which cover
approximately 27,000 km2. For many years, caldén woodlands were
considere...
Prosopis pugionata (Fabaceae) is a halophyte tree species that grows exclusively in Argentina's arid environments, whose woodlands are mainly affected by fires and overgrazing. Here, we describe the wood anatomy and fire wounds of P. pugionata and their relationship with plant size and bark thickness. Besides, we attempt to determine the potential...
The arid and semi-arid areas in Argentina occupy more than the sixty percent of the country. The genus Prosopis dominates these environments with approximately 21 species. The driest part of the Argentinean Pampas is dominated by caldén (Prosopis caldenia) forests which cover approximately 27,000 km2. For many years, caldén woodlands were considere...
Arid and semiarid environments dominate the Earth's surface and are very vulnerable to global change. Chañar (Geoffroea decorticans) and brea (Parkinsonia praecox) are two ubiquitous woody species of these environments. They grow in degraded forests, strongly modified areas and as a main component of secondary forests. Despite the value of both spe...
Prosopis genus comprises 44 species which grow in arid and semiarid environments of America, Asia and Africa and in Oceania as introduced species. Of those 44 species, 30 grow in America. Argentina is supposed to be the origin center of the genus Prosopis, and that could explain the fact that this country has the highest species variability. Prosop...
The Pampas is a natural flat region that covers 750 000 km ² in Brazil, Uruguay and Argentina. The driest part of the Argentinean Pampas is occupied by thorny forests dominated by Fabaceae species, mainly by caldén (Prosopis caldenia Burkart). The caldén's area was affected by large human immigration processes that started in the 18th century up to...
In transverse sections of the wood of Anacardium excelsum (Bertero ex Kunth.) Skeels., Bursera simaruba (L.) Sarg. and Aspidosperma polyneuron Müll. Arg., the anatomy was characterized and the annual growth rings were differentiated. These species grow in the dry tropical forests of the reserve of Besotes and Rio de Janeiro in Valledupar (Cesar, Ca...
The R-package BIOdry allows to model and compare fluctuations of Tree-ring Width (TRW) and climate, or dendroclimatic fluctuations, while accounting for source variability. The package eases multilevel modeling and multivariate comparison in dendroclimatic analysis using the nlme and ecodist packages, respectively. For implementing such libraries,...
The Austrocedrus chilensis forests in Argentina experience a process of decline and mortality with important impacts on the structure and population dynamics. Although its study has received significant attention over time, knowledge related to the growth of the regeneration and its response to the gradual changes in the canopy over time driven by...
Management objectives and techniques in woodlands dominated by Quercus species have changed dramatically over the last few decades, especially in the case of coppices. The fact that these stands are of little economic importance today is in part compensated by their value, for example, as carbon sinks. The identification of this important role of Q...
R-package BIOdry is developed to consider ecological factors in dendroclimatic modeling of forest ecosystems. The package processes Multilevel ecological data series (MEDS) with two functions: modelFrame and muleMan. These integrate techniques for modeling Tree-rings in wood (TRW) chronologies and climatic series at specific ecological-factor level...
Cordia alliodora has a high ecological and economical value in the dry forest of Colombia. We documented the relationship between tree growth and climate variables (total annual precipitation, mean annual temperature) and the southern oscillation index (SOI) in this study. Standard dendrochronological methods were applied on 28 individuals. Presenc...
Resumen La especie Cordia alliodora tiene un alto valor eco-lógico y económico en la formación de bosque seco tropical de Colombia. En este estudio se documentó la relación entre el monto de precipitación anual, temperatura media anual y el índice de oscilación del sur (SOI) con los anillos anuales de crecimien-to de 28 individuos de C. alliodora c...
The Argentinean pampas are natural flatlands that cover about 520 000 km2 being considered as the most characteristic landscape of Argentina. Even though the pampa is considered as a land without trees the driest southernmost distribution limit is covered by xerophyte woodlands mainly dominated by caldén (Prosopis caldenia Burkart, Fabaceae). In 19...
Background: The Mediterranean basin has experienced an increase in the mean annual temperature, a decrease in the mean annual precipitation, and an increase in the frequency of severe drought periods during the second half of the 20th century. However, winter and spring precipitation has increased and summer precipitation has decreased in the weste...
• Context
Modification of stand density by thinning may buffer the response of tree growth and vigor to changes in climate by enhancing soil water availability.
• Aims
We tested the impact of thinning intensity on cambial growth of Aleppo pine (Pinus halepensis L.) under semi-arid, Mediterranean conditions.
• Methods
A multiple thinning experiment...
Carbon isotope ratios, recorded as C-13/C-12 variations in tree rings of woody species, are the result of physiological changes related to environmental conditions. The objective of this work was to analyze the association among carbon thirteen variability (delta C-13), climate variables and tree-ring growth of Pinus pinaster and Pinus sylvestris i...
Araucaria, pino Paraná or curý (Araucaria angustifolia (Bertol.) Kuntze) is a dioecious tree that dominates the mixed neotropical ombrophilous forests in Brazil and Argentina, South America, known as araucaria forests. The species is nowadays critically endangered by deforestation and global climate change. The goal of this study was to analyse the...
In 1931, Krebs and Fischer, published El pluviómetro secular (The centenary pluviometer) an analysis of tree rings of Prosopis caldenia Burkart (caldén) in the central Argentinean Pampas which, according to the date, may be considered as one of the first dendrochronological studies in South America.
La región mediterránea ha experimentado un aumento en la temperatura media anual, una disminución en las precipitaciones anuales y un aumento en la frecuencia de sequías en la segunda mitad del siglo XX. Los pinares son la infraestructura ecológica más importante de la región, produciendo bienes y servicios y favoreciendo la resiliencia y la adapta...
Semiarid woodlands dominated by Prosopis caldenia thrive at the dry edge of the Argentinean Pampas. Deforestation and increased precipitation have driven sustained water table level rise in the region that are likely to affect the dynamics of remnant woody vegetation patches. Here we analyze the effect of climate and groundwater level on the establ...
Intraannual features or anomalies in the tree rings of woody species may provided useful information for ecological and climatological studies. The frequency of intraannual density fluctuations (IADFs), differences in IADFs according to the cambial age, changes in IADFs in the last century, and relationships of IADFs to radial growth and climate we...
The associations between tree-ring width and climatic variables, the tree age effect on climate-growth relationship and the drought index impact on radial growth of Scots pine (Pinus sylvestris L.) were studied in Mediterranean environments in the Iberian Peninsula. Dendrochronological techniques were applied to construct six tree-ring width chrono...
• The effect of climatic variables (temperature and precipitation) on radial growth of the Mediterranean Maritime pine (Pinus pinaster Ait.) was studied using dendrochronological techniques in the Iberian Peninsula. • Ten tree-ring width chronologies, along the central distribution area of the species, were built. Chronology variability was analyse...
Prosopis caldenia Burkart (caldén) is the most important woody species in the caldenales, the open xerophytic woodlands covering approximately 33 000 km2 in the semiarid central region of Argentina. Dendrochronological techniques were used to estimate mean radial growth and the biological rotation age of P. caldenia in San Luis, Central Argentina....
The Kyoto Protocol requires every industrialized country to have a transparent and verifiable method for estimating the size and evolution of the carbon stored in forest ecosystems. The intergovernmental panel on climate change (IPCC, 2007) predicts the evolution of the stock over the first commitment period (2008–2012) using the “bottom-up approac...
The forestal tragedy of the San Luis province (Argentina) Summary The purpose of this research was to analyze, in San Luis province, the relationship that the man have had with the forests, from the pre-Columbian to the recent time. That was an encomiastic instrument to understand the present management of the natural resources The methodology was...
La relación que existe entre el crecimiento de los árboles y el clima es esencial para aplicar y desarrollar estrategias forestales para mitigar el impacto del cambio climático. Se aplicaron distintas técnicas dendroclimatologicas para analizar la relación entre Pinus pinaster y Pinus sylvestris y las variables climáticas en los ambientes Mediterrá...
Questions
Questions (2)
Dear all,
I am interested about on which species you are working and if you can specify the environment where they grow.
Thank you.
Stella.
We have severe invasion of Rubis ulmifolius in forests of the mountainous area in the San Luis province, central Argentina. Does anybody have any information about biological control as an alternative to rule this species?
