Leandro Macchi

Leandro Macchi
National University of Tucuman | UNT · Laboratorio de Investigaciones Ecológicas de las Yungas

Researcher

About

27
Publications
13,418
Reads
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965
Citations
Citations since 2016
15 Research Items
835 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Introduction
Leandro Macchi currently works at National University of Tucuman. Leandro does research in avian ecology, land use impacts in biodiversity, land cover and birds, occupancy analysis along gradients.

Publications

Publications (27)
Article
Full-text available
The different ways in which biodiversity is distributed on Earth have always intrigued ecologists, promoting constant research to elucidate the causes and mechanisms that guide their spatial patterns. Numerous hypotheses have been proposed to explain biodiversity across the world. In South American Subtropical Dry forests, a global deforestation ho...
Article
Strong trade-offs between agriculture and the environment occur in deforestation frontiers, particularly in the world's rapidly disappearing tropical and subtropical dry forests. Pathways to mitigate these trade-offs are often unclear, as well as how deforestation or different policies alter the option space of available pathways. Using a spatial o...
Preprint
Full-text available
Strong trade-offs between agriculture and the environment occur in deforestation frontiers, particularly in the world’s rapidly disappearing tropical and subtropical dry forests. Pathways to mitigate these trade-offs are often unclear, as well as how deforestation or different policies alter the option space of available pathways. Using a spatial o...
Article
Full-text available
Land-use change is a root cause of the extinction crisis, but links between habitat change and biodiversity loss are not fully understood. While there is evidence that habitat loss is an important extinction driver, the relevance of habitat fragmentation remains debated. Moreover, while time delays of biodiversity responses to habitat transformatio...
Article
Full-text available
Por su continuidad espacial y su relativa homogeneidad ecológica y biofísica, las ecorregiones son un nivel de organización apropiado para discutir y planificar iniciativas de conservación del ambiente a escala regional y nacional. Las interacciones complejas entre las características ecológicas de las ecorregiones, los cambios socioeconómicos loca...
Data
Tabla A2. Puntaje de cada presión (de 0 a 100, con valores más altos reflejando una mayor incidencia de la misma) en las ecorregiones terrestres de Argentina en base a su jerarquización sobre cuatro dimensiones.
Article
Full-text available
Understanding how biodiversity responds to intensifying agriculture is critical to mitigating the trade‐offs between them. These trade‐offs are particularly strong in tropical and subtropical deforestation frontiers, yet it remains unclear how changing landscape context in such frontiers alters agriculture–biodiversity trade–offs. We focus on the A...
Article
Full-text available
Understanding the trade‐offs between biodiversity conservation and agricultural production has become a fundamental question in sustainability science. Substantial research has focused on how species’ populations respond to agricultural intensification, with the goal to understand whether conservation policies that spatially separate agriculture an...
Article
Full-text available
World‐wide, tropical savannas and dry forests are under increasing pressure from land use. The environmental impacts of agricultural expansion into these ecosystems have received much attention, yet subtler changes in natural vegetation remain severely understudied. We explored how bird communities vary along gradients of woody vegetation in the So...
Article
Tropical dry forests and savannas provide important ecosystem services and harbor high biodiversity, yet are globally under pressure from land-use change. Mapping changes in the condition of dry forests and savannas is therefore critical. This can be challenging given that these ecosystems are characterized by continuous gradients of tree and shrub...
Article
Full-text available
Habitat loss is the primary cause of local extinctions. Yet, there is considerable uncertainty regarding how fast species respond to habitat loss, and how time-delayed responses vary in space. We focused on the Argentine Dry Chaco (c. 32 million ha), a global deforestation hotspot, and tested for time-delayed response of bird and mammal communities...
Article
Agricultural expansion and intensification in South America's dry forests and grasslands increase agricultural production, but also result in major environmental trade-offs. The Pampas and Chaco regions of Argentina have been global hotspots of agricultural land-use change since the 2000s, yet our understanding of what drives the spatial patterns o...
Article
Full-text available
The subtropical dry forests are experiencing rapid clearing in the southamerican Great Chaco region, mainly for soybean production in Argentina. This is causing biodiversity loss and soil salinization. This forests are unique for the floristic richness and the dense forest cover in a region characterized by semiarid climatic conditions. The authors...
Article
Full-text available
The South American dry Chaco is a mosaic of woody vegetation and grasslands with high deforestation rates in recent decades. Considering forests and grasslands as the main natural habitats, we assessed the trade-offs between bird populations and agricultural production to compare the potential consequences of different land use strategies (‘sharing...
Article
The multi-scale spatial match between bird and food abundances is a main driver of the structure of fruit-eating bird assemblages. We explored how the activity of fruit-eating birds was influenced by the abundance of fruits at the local and landscape scales in Andean mountain forests during the breeding season, when most birds forage close to their...
Poster
Full-text available
Estudiamos la relación espacio-temporal entre la composición de aves y la fenología y estructura de los bosques del Chaco Seco.
Research
Full-text available
The South American dry Chaco is a mosaic of woody vegetation and grasslands with high deforestation rates in recent decades. Considering forests and grasslands as the main natural habitats, we assessed the trade-offs between bird populations and agricultural production to compare the potential consequences of different land use strategies (‘sharing...
Article
In most tropical and subtropical biomes, conservation strategies are mainly focused on the preservation of forests. However, neotropical dry forest and savanna ecoregions include open habitats that may deserve conservation attention. We analyzed the historical patterns and potential distribution of natural grasslands, as well as their biodiversity...
Article
Full-text available
Environmental factors and land use control habitat quality and resources availability, thus regulating species distribution. Land tenure in general, and particularly traditional indigenous properties, strongly influence land use in forest ecosystems, but their association with biodiversity is poorly explored. We surveyed 43 forests in the Northern...
Article
Full-text available
By addressing the trade-offs between food production and biodiversity conservation at landscape and ecoregion scales, the land sparing/sharing debate has made a significant contribution to land use science. However, as global population and food consumption grow, and urbanization and transnational trade intensify, land use trade-offs need to be ana...
Article
Full-text available
Studies to assess the relationship between agriculture production and biodiversity conservation usually focus on one gradient ranging from a natural reference land cover type (typically forest) to an intensive productive land use. However, many semi-arid ecoregions such as the dry Chaco are characterized by a mosaic of different land covers, includ...
Article
Full-text available
The White-fronted Woodpecker (Melanerpes cactorum) drills holes in branches and trunks to feed on sap flows, providing an energy-rich food resource for other birds. Here we describe ecological and behavioral traits of the White-fronted Woodpecker related to its sap-feeding habits in the semiarid Chaco of Argentina and explore the structure of the a...
Article
Full-text available
In arid and semiarid ecosystems, the congregation of livestock around water sources gives rise to a utilization gradient termed the “piosphere pattern”. We evaluated piospheres surrounding the puestos livestock management system in the Chaco dry forests of Argentina. We sampled vegetation and bird communities around eighteen puestos and we fitted c...
Article
Full-text available
1. The fruit-tracking hypothesis predicts spatiotemporal links between changes in the abundance of fruit-eating birds and the abundance of their fleshy-fruit resources. 2. While the spatial scale of plant–frugivore interactions has been explored to understand mismatches between observed and expected fruit–frugivore patterns, methodological issues s...
Article
Full-text available
Abstract. Sap is a resource of high energy content that is usually inaccessible to birds, although woodpeckers have the ability to drill into living trees to obtain sap. Because spatial patterns of resource availability influence avian abundance, we explored how spatial patterns of sap availability determine the spatial distribution of two sap-feed...

Questions

Questions (2)
Question
hi there,
im exploring how does community functional diversity vary along human intensity gradients. Looking for methods to relate species-sites with species-traits matrices?
ideally i want to avoid functional indexes
thanks
Question
During my PhD I collected field data of birds populations. Each plot consist in a 1x1km2 square, inside this square I have 9 points counts uniformly distributed. In each point count I recorded presence/absence of birds species. So at the end, for each plot, I had a "relative frequency" from 0-9.
Now I trying a make a bigger data sets, compiling my data with two other data sets. This sets responded more to typical "abundance" measure, number of individual/area or time at each point count (In one case 5 points counts within each plot, the other case I will ask now).
So all the data seems to have quantitative information for a specific area. In my case the area would be 0-9 for 1km2 or 0-1 for each point count (20m radius). While in the other cases will be the radius around each point count (and maybe a mean value of the point counts corresponding to each plot).
So how possible is to compile this sets either as a quantitative measure per plot or a similarity measure between plots?
All this plot are dispersed a land use intensity gradient that goes from natural habitat (forest) to agricultural systems. Therefore maybe we can used a standardized metric of similarity within each data set?

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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).
Project
Focusing on the part of the Argentine Chaco within the five provinces of Salta, Formosa, Santiago del Estero, and Chaco, PASANOA will 1. provide new insights into the trade-offs and synergies between agricultural production, ES provisioning and biodiversity 2. explore drivers of land use decisions and how they vary across land systems 3. assess how trade-offs between production and conservation land uses may vary across a set of plausible future land-use scenarios 4. identify optimal landscape patterns that mitigate trade-offs along with guidance on how to implement such landscapes
Project
This project aims at understanding what drives agricultural land-use change, and which factors influence spatial patterns of land-use change in the Pampas and Chaco ecoregions of Argentina.