Ezequiel Aráoz

Ezequiel Aráoz
National University of Tucuman | UNT · Instituto de Ecología Regional (IER)

Dr.

About

41
Publications
10,818
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Citations
Introduction
Ezequiel Aráoz currently works at the Instituto de Ecología Regional (IER), National University of Tucuman. Ezequiel does research in Ecology, Chronobiology and Biostatistics. Their current project is 'Linking vegetation function and ecosystem services: an innovative multi-scale approach to investigate urban forests dynamics'.
Additional affiliations
July 2006 - present
National University of Tucuman
Position
  • Researcher

Publications

Publications (41)
Article
Full-text available
Most studies on forest transition (FT) have focused on temporal patterns of forest cover across whole countries or regions, without much consideration of the local spatio-temporal heterogeneity or the species composition of new forests. We hypothesize that peri-urban forest transitions are driven by processes associated with urban-based economies a...
Article
Human settlement into rural areas (counterurbanization) is generating new patterns of reforestation, with distinctive features compared to the previously considered pathways of forest transition through “economic development” and “forest scarcity”. Here, we discuss the specific features of this neglected pathway of forest recovery and describe the...
Article
Full-text available
The landscape configuration of socio-ecological land systems results from the interaction between the environmental conditions (relatively homogeneous within ecoregions) and country-level management and land-use decisions. However, social, land-use and sustainability research disciplines often study each independently. We used Euclidean distance an...
Preprint
Full-text available
Human population is becoming increasingly more urbanized, and in that context private gardens contribute to biodiversity and to access to ecosystem services in cities. The urbanized landscape reflects social, economic and cultural differences of the population, which affect the patterns of urban biodiversity. Socioeconomic level is one of the main...
Article
Full-text available
ContextThe patterns and causes of forest transition have been extensively studied, identifying socio-economic drivers of land use deintensification and the associated forest expansion. However, most studies do not take into account the origin of the dominant species of new forests (i.e. native or exotic), which affects biodiversity and the provisio...
Article
Full-text available
During the past decades, the Argentine Puna (a subtropical high elevation desert of c. 14 million hectares) has been going through a process of “rewilding” of large herbivore communities. In response to rural population outmigration and resulting livestock reduction accompanied by protection measures, large wild herbivores such as vicuñas increased...
Article
Full-text available
Seventy-five percent of the human population will live in urban areas by 2050, and urban vegetation will be the main source of ecosystem services. Unequal access to urban vegetation might exacerbate existing socioeconomic differences. Studies performed in cities of developed countries show that the population with higher socioeconomic status has mo...
Article
Full-text available
Climate change and habitat loss are key threats to biodiversity, by acting as controlling factors of species’ distributions. In this study, we combined ecological niche modeling with an innovative range-diversity analysis, which simultaneously addresses geographical ranges and species richness, to describe current biodiversity distribution patterns...
Article
Full-text available
In most of the planet, large herbivore communities have been replaced by livestock, but this process is reversing in many places. Here, we outline and review the pathways of “megaherbivore rewilding transitions” in three social-ecological-systems of subtropical Argentina. In the extensive arid high-elevation Puna plateau we observed a “rapid rewild...
Article
Urbanization is causing profound alterations of ecosystem functions at local and regional scales. The need to maximize ecosystem services to improve the livability of cities is resulting in intensive management of urban vegetation, which is likely generating new conditions for the ecosystem functioning. In this paper, we address the association bet...
Article
Full-text available
The interactions between climate and land-use change are dictating the distribution of flora and fauna and reshuffling biotic community composition around the world. Tropical mountains are particularly sensitive because they often have a high human population density, a long history of agriculture, range-restricted species, and high-beta diversity...
Article
Full-text available
Movement plays a main role in the correct development of joint tissues. In tetrapods, changes in normal movements produce alterations of such tissues during the ontogeny and in adult stages. The knee-joint is ideal for observing the influence of movement disorders, due to biomechanical properties of its components, which are involved in load transm...
Data
List of treated and control specimens. MCV: field number of Miriam Corina Vera.
Data
Results of multinomial ordinal logistic regression analysis. mNFm: nuclei of the fibrocartilage; mFTM: tendon fibers; mFMm: menisci fibers; mCHm, hypertrophic chondrocytes; st: stage; sp: specie; tr, treatment; md: locomotor mode; int1: intercept sp*tr; int2: intercept st*tr; int3: intercept md*tr.
Article
Full-text available
Dispersal abilities of invading species emerge from the interaction between the species and some features of the target community. Ligustrum lucidum is a tree species invading different ecosystems. Major spatial patterns of Ligustrum invasions and their ecological consequences have been analyzed, but no study addressed the dispersal process at a fi...
Article
Full-text available
The Southern Annular Mode (SAM) is the main driver of climate variability at mid to high latitudes in the Southern Hemisphere, affecting wildfire activity, which in turn pollutes the air and contributes to human health problems and mortality, and potentially provides strong feedback to the climate system through emissions and land cover changes. He...
Article
Changes in ecosystem structure caused by urbanization produce a reduction in photosynthetic productivity, which can lead to reductions in resource availability for birds. Here, we analyzed the relation between photosynthetic productivity and bird assemblages in a subtropical urban ecosystem, in North-Western Argentina. We used Generalized Linear Mo...
Article
Full-text available
Subtropical dry forests are among the most vulnerable biomes to land transformation at a global scale. Among them, the Dry Chaco suffers an accelerated change due to agriculture expansion and intensification. The Dry Chaco ecoregion is characterized by high levels of endemisms and species diversity, which are the result of a variety of climates and...
Data
Locality data information of all unique records compiled for Leptodactylus bufonius, L. chaquensis, L. elenae, L. fuscus, L. gracilis, L. laticeps, L. latinasus, L. latrans, L. mystacinus and [i]L. podi. Locality data information includes collection number whenever available, museum acronym following Sabaj Perez (2010), locality data description, l...
Data
Percentages of potential distribution of Leptodactylus spp. Percentages of potential distribution of Leptodactylus bufonius, L. chaquensis, L. elenae, L. fuscus, L. gracilis, L. laticeps, L. latinasus, L. latrans, L. mystacinus and L podicipinus on each ecoregion (sensu Olson et al., 2001). Values with asterisk show overlap percentages higher than...
Article
Agricultural landscapes support large amphibian populations because they provide habitat for many species, although agriculture affects amphibians through various mechanisms. Pollution with agrochemicals is the major threat to amphibian populations after habitat loss, as chemicals alter the ecophysiology of amphibians, putting their health and surv...
Article
Full-text available
We analyzed the prevalence of tail autotomy and regeneration in Teius teyou with the use of 640 museum specimens. There is a marked difference in the prevalence of tail autotomy between juveniles (5.4%) and adults (23.9%); we found no significant differences in the prevalence between males and females. In contrast with the trends observed in other...
Article
Full-text available
Fruit selection, i.e., the consumption of fruits disproportionately to their availability, results from the interaction between diet preferences and ecological factors that modify them. We assessed the importance of functional fruit traits to explain fruit selection by birds in Andean subtropical forests, taking into account temporal variation in t...
Article
As a group amphibians are the vertebrates most affected by anthropic activity, particularly by agriculture. The rapid advance of the agricultural frontier makes it important to identify the role of agroecosystems as habitat supply for amphibians. We analyzed the differences in amphibian assemblages and populations between habitats with different pl...
Article
Full-text available
The loss of evidence poses a major challenge to historical ecology. For example, dendroecological studies aiming at relating tree establishment with past climate should consider the possibility that many plants might not survive to be recorded at the date of the study. A standard approach to deal with this data loss consists in fitting an exponenti...
Article
Full-text available
We analyze patterns of abnormalities in anurans from Tucumán, Argentina, deposited in the Fundación Miguel Lillo collection. We examined 1651 specimens collected between 1940 and 2010. Overall abnormality prevalence was 4.4% for post-metamorphic individuals. The most common types of abnormalities affected the hindlimbs, and concerned reductions in...
Article
Full-text available
Argentina has a long history of protected areas creation which allows assessing temporal, territorial and biogeographical trends in relation to macroeconomic and political changes. In this paper, we created an index to quantify the originality of the contribution of each newly created national park to the conservation of the biogeographic diversity...
Article
Argentina has a long history of protected areas creation which allows assessing temporal, territorial and biogeographical trends in relation to macroeconomic and political changes. In this paper, we created an index to quantify the contribution of each newly created national park to the conservation of the biogeographic diversity of Argentina ecore...
Article
Full-text available
The generalization that plant communities increase in flammability as they age and invariably lead to resilient self-organized landscape mosaics is being increasingly challenged. Plant communities often exhibit rapidly saturating or even hump-shaped age-flammability trajectories and landscapes often display strong non-linear behaviors, abrupt shift...
Article
Full-text available
We used dendroecological techniques to analyze the effects of rainfall and grazing on fire regime and its implications for tree regeneration in subtropical mountains of northwestern Argentina during the 20th century, a period characterized by increasing rainfall and decreasing land-use intensity. We dated fire scars and establishment of Alnus acumi...
Article
Full-text available
We used dendroecological techniques to date fire scars in woody species growing in a subtropical savanna of the Argentine Chaco dry forests, and to explore the temporal trends of fire with rainfall variability at different temporal scales during the 20th century. Eight sampling sites were located along an ecotone between savanna and a dry forest, a...
Chapter
Full-text available
Extensive areas of montane cloud forests have been transformed into degraded grasslands due to intensive land use in the past. As a consequence of economic modernization and rural-to-urban migration, land-use intensity is decreasing in many of these areas. This chapter combines analysis of historic land use with dendrochronologic estimates of clima...
Article
Full-text available
En el noroeste de Argentina se observa la recuperación de distintos ecosistemas naturales, históricamente degradados por usos agrícolas y ganaderos tradicionales en zonas marginales para la producción. Estas nuevas oportunidades de conservación y restauración ecológica se asocian a la modernización agrícola y la urbanización poblacional.

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Projects

Projects (3)
Project
This Project aims at describing land-use/cover changes in Latin America (LA) in the most complete and detailed way for the 21st century (2001-2020). It relates these changes to global and regional drivers of change (e.g., commodity markets, population) and explores the consequences of these processes on the efficiency of territorial use (i.e., compatibility and stability of agricultural production, biodiversity conservation and biomass preservation) in the different ecoregions of Latin America).
Archived project
Urbanisation is a global phenomenon that defines the 21st century. Although urban areas cover less than 2% of the planet they accommodate more than 50% of the world's population and are responsible for more than 75% of energy consumption and up to 80% of global carbon dioxide (CO2) emissions. Policy makers propose to increase vegetation cover in cities to mitigate local CO2 emissions and to restore ecosystem services (e.g. air pollution and climate regulation). Ecosystem services provided by urban vegetation are closely related to vegetation characteristics and ecosystem functions (e.g. species specific photosynthetic activity). Thus, information on vegetation cover alone is not sufficient to quantify urban ecosystem services. To date the temporal and spatial variation in urban vegetation functions and services are poorly studied. Further, not much is known about of the role of vegetation in releasing CO2 and volatile organic compounds (VOCs) and under environmental stress. Our goal is to develop an innovative multi-scale (temporal and spatial) and multi-sensor approach to quantify the spatial and temporal dynamics of functions and ecosystems services provided by Auckland’s urban vegetation. To investigate the temporal dynamics of local climate change and vegetation functioning we will use time series analysis of vegetation indices and surface temperature images derived from satellite images (MODIS) which will be processed using the TIMESAT software. This allows to reconstruct the temporal and spatial patterns of plant phenology and surface temperature. The large scale approach (phenology and temperature patterns reconstruction derived from MODIS) will be complemented with high spatial resolution multispectral images using Unmanned Aerial Vehicles (UAVs) and ground level measurements of CO2 and VOCs. Once the correlations are established the resulting parameters will be combined with other field surveys (i.e leaf area index, biomass, etc.) and incorporated into the i-tree software to quantify the ecosystem services provided by urban forests and its variations over time. The outcome of this innovative multi-dimensional approach provides a new framework/prototype to investigate the dynamic of ecosystems functions and to value ecosystems services in urban areas. This prototype can be modified for other urban areas around the globe and thus would enable policy makers and local governments to assess the benefit of urban vegetation in combating climate change and to enhance the wellbeing of urban citizens.
Archived project
Los objetivos de esta tesis fueron: analizar los efectos del fuego sobre un grupo de especies de leñosas nativas, evaluar su potencialidad para estudios dendroecológicos sobre regímenes de fuego, determinar la frecuencia e intensidad de los fuegos en una sabana típica del ambiente chaqueño y estudiar la interacción entre las precipitaciones y la ocurrencia de estos eventos.