Leonardo Galetto

Leonardo Galetto
National University of Cordoba, Argentina | UNC · Dept Div Biol & Ecol

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248
Publications
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Introduction
Leonardo Galetto currently works at the Dept Div Biol & Ecol, Facultad de Ciencias Exactas, Físicas y Naturales, National University of Cordoba, Argentina. Research is mainly focused on: a) community ecology and biological interaccions, b) effects of forests loss and fragmentation on biodiversity and pollination, c) agro-ecosystems, crops, and ecosystem services.
Additional affiliations
January 1995 - present
National Scientific and Technical Research Council
Position
  • Investigador Superior
January 1995 - present
National Scientific and Technical Research Council
Position
  • Investigador Superior
September 1991 - present
National University of Cordoba, Argentina
Position
  • Professor (Full)

Publications

Publications (248)
Article
Soybean is the most important crop for Argentina in terms of cultivated area and annually exported tons. Although soybean is autogamous, crop yields can be enhanced by pollinators. The aim of this study is to analyze the effects of insect pollination on soybean production. A pollination exclusion experiment (15 replications) was conducted to analyz...
Article
Full-text available
Context The process of forest fragmentation determines landscapes with isolated forest patches immersed in a distinct matrix. This process may hinder pollinator movement throughout the landscape, which may negatively impact on pollen flow among native plant populations. Objectives We evaluated the effect of the loss of forest connectivity on polle...
Article
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Floral morphology can determine the type of animal that can be an effective pollinator. In flowers with nocturnal anthesis long-tubed flowers may attract long-tongued insects such as hawkmoths. However, flowers with more open morphology have nectar that can be more easily accessed by bats and short-tongued moths. These contrasting conditions may ha...
Article
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The secretion dynamics and chemical compositions of flower nectar can vary according to the plant physiology and the pollinator type. Bat-pollinated flowers are commonly associated with nocturnal nectar secretion as well as large amounts of nectar per flower, which is generally diluted and composed mostly of hexose sugars. The nectar traits in bat-...
Article
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Invasive alien plant species (IAPS) are severely changing ecosystems on earth. Studying the interactions that allow IAPS to establish and spread in the new regions is crucial. Ants can disperse exotic fleshy fruits. We asked the following questions at three different sites of Chaco Mountain Forest (Córdoba, Argentina): (1) Do ants disperse diaspore...
Article
Honeybees settled in agricultural ecosystems may encounter glyphosate residues on flowers of cultivated and native plants growing in semi-natural habitats. This work analyzes the relationship between the presence of pesticides in honey and some features of the landscape that surrounds the apiaries. A total of 30 honey samples were analyzed, and the...
Article
Vegetated roofs (VRs) contribute to the resilience of cities by providing multiple ecosystem functions. A wide range of these benefits depends on the plant layer. Here, we hypothesized that increasing biodiversity attributes (i.e., composition, structural, and functional) in VRs will improve their performance under the climate conditions of semiari...
Chapter
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Este capítulo centra su enfoque en el Parque Chaqueño. Se presentan sus grandes unidades de paisaje y una muy breve descripción del bosque ya que en otros capítulos se aborda de manera más detallada esa descripción, incluyendo aspectos climáticos y de relieve, entre otras cosas. El mismo se orienta luego a la descripción de las prácticas de ma...
Article
Biotic invasions constitute a threat for natural communities, affecting ecological and evolutionary integrity of natural ecosystems. Gleditsia triacanthos is an invasive species in many regions of the world. In Argentina, its populations are expanding over native vegetation of different ecoregions. The aim of this work is to study the reproductive...
Article
Vegetated roofs reduce temperature and heat flow fluctuations on the building's surface mitigating the urban heat island effects and improving other ecosystem services. The objectives of this work were to quantify thermal reduction and to evaluate the performance of vegetated-microcosm treatments during 15 months with different species composition...
Article
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Hummingbirds in the Cerrado, the seasonal savannas in Central Brazil, visit both ornithophilous and non-ornithophilous flowers to collect nectar, which is the main source of energy and nutrients to these pollinators. The aim of the present study was to assess the volume, concentration, energy content and sugar composition of nectar collected from 3...
Article
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SOBRE EL PODER DE HACER COSAS CON PALABRAS / ¿Qué es la imposición de una retórica colonial si no la capacidad de hacer que las palabras encubran y justifiquen el despojo? ¿Cuál es el significado de “agroecología” cuando las corporaciones del agronegocio se apropian de ese bien común esencial para no ser un país cada vez más pobre y desigual que es...
Article
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Pollinator decline has attracted global attention and substantial efforts are underway to respond through national pollinator strategies and action plans. These policy responses require clarity on what is driving pollinator decline and what risks it generates for society in different parts of the world. Using a formal expert elicitation process, we...
Chapter
Full-text available
Se presenta el estado de los bosques del Espinal, analizando la estructura y funcionamiento de los principales tipos de unidades de paisaje. Se discuten los principales cambios a nivel del paisaje relacionados con el manejo histórico del territorio y aspectos socioecológicos vinculados a los cambios en el uso de la tierra. Se presentan los tratamie...
Article
Background: Kiwifruit is an important horticultural crop all over the world with an important development in Argentina. This dioecious crop presents a short blooming period with nectarless flowers, and its fruit production depends on cross-pollination. Here, we tested whether kiwifruit quality increases by using honeybees exposed to female flowers...
Article
In tropical dry forests, fire is a common disturbance and seed traits may drive regeneration of plant populations during these events. In this study, we aimed to (i) investigate whether the seed coat and/or fruit endocarp impose physical dormancy, (ii) check whether physical dormancy confers seed tolerance to heat shocks and (iii) verify whether he...
Article
The diversity and abundance of pollinators are increased in cultivated areas in proximity to natural and semi‐natural habitats (pastures, forest, tree lines, etc.). Managing ecosystem services, such as insect pollination, is essential to increase crop yields. Although insect pollination is linked to better yields in many crops, pollinators are usua...
Article
Extensive green roofs improve the provision of ecosystem services in urban environments, particularly in semiarid regions. The aim of this paper is to compare their thermal performance during six months between two rooms, one with a green roof and the other with a conventional roof, in Córdoba (Argentina). The room with a green (planting) roof show...
Article
Visiting flower insects can be pollinators or, on the contrary, have no relation to the reproductive process of plants. Interactions between pollinating and non-pollinating floral visitors can negatively influence pollen transfer. Little is known about the effects of bee visits on the pollination of squash flowers (Cucurbita spp.) their interaction...
Preprint
Full-text available
Pollinator decline has attracted global attention, and substantial efforts are underway to respond, through national pollinator strategies and action plans. These policy responses require clarity on what is driving pollinator decline, and what risks it generates for society, in different parts of the world. Using a formal expert elicitation process...
Article
Habitat remnants act as a source of pollinators potentially relevant for crop pollination and yield. This work analyzes how habitat loss influences pollinators, effective pollination and yield of soybean crops. The study area comprises ten sites adjacent to forest patches surrounded by a soybean matrix in central Argentina (eight sites in the seaso...
Article
Studies in crop plants analyzing floral biology in conjunction with effectiveness and efficiency of pollinators on pollen transfer and fruit formation are not common, although they are essential to provide better management actions. On this base, we selected a farm in Bahia, Brazil, to study pollination on coffee plants (Coffea arabica L.). Specifi...
Article
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The specialised mutualism between Tococa guianensis and ants housed in its leaf domatia is a well-known example of myrmecophily. A pollination study on this species revealed that flowers in the bud stage exude a sugary solution that is collected by ants. Given the presence of this unexpected nectar secretion, we investigated how, where, and when fl...
Article
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Endangered species in isolated habitats (e.g., inselbergs) may escape mate limitation during patch colonization through autonomous self-pollination. After colonization, the higher the number of plants breeding randomly within populations through cross-pollination, the lower is genetic erosion caused by genetic drift and inbreeding. Additionally, po...
Article
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Forest fragmentation represents a threat to several bird species worldwide. Several factors can change across seasons (e.g., bird perception of the landscape, weather conditions, biotic interactions) which can modify the response of bird populations to forest fragmentation. However, most studies have been conducted only during the breeding season....
Article
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Nectar production in flowers has been associated with pollination systems and seen as part of plant reproductive strategies. But other factors may have a role on nectar features and its efficacy as reward. We investigated pollination system of Qualea grandiflora, the most widespread woody species of Cerrado, the Neotropical savannas in Central Braz...
Article
Full text: https://rdcu.be/bVy8H | https://www.nature.com/articles/s41893-019-0412-1 | doi: 10.1038/s41893-019-0412-1 | Regional and global assessments periodically update what we know, and highlight what remains to be known, about the linkages between people and nature that both define and depend upon the state of the environment. To guide resear...
Article
Background Conceptual clarity is important to attain precise communication of scientific knowledge and to implement appropriate technological and policy actions. Many concepts referring to forest management are widely used by decision-makers, regardless of their complexity. Although the scientific and methodological issues of forestry practices are...
Article
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La región fitogeográfica del Espinal en Argentina está críticamente amenazada, ya que gran parte de su territorio históricamente cubierto por bosque fue convertido a cultivos. Con el fin de evidenciar el valor de conservación de bosques relictuales en la región, realizamos un inventario de las especies de aves presentes en uno de los relictos de Es...
Chapter
In recognition of the importance of nature, its contributions to people and role in underpinning sustainable development, governments adopted a Strategic Plan on Biodiversity 2011-2020 through the Convention on Biological Diversity (CBD) containing 20 ‘Aichi Biodiversity Targets’ and integrated many of these into the Sustainable Development Goals (...
Article
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An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Article
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Pollinators underpin sustainable livelihoods that link ecosystems, spiritual and cultural values, and customary governance systems with indigenous peoples and local communities (IPLCs) across the world. Biocultural diversity is a shorthand term for this great variety of people–nature interlinkages that have developed over time in specific ecosystem...
Article
The Chaco is the largest dry forest biome in South America and one of the regions most threatened by agricultural intensification. As a consequence, in several areas Chaco forests persist as forest remnants of different sizes embedded in an agricultural matrix. Ants are social insects that have key roles in ecosystem functioning, and the effects of...
Chapter
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Chapter 2 makes the case for using systems thinking as a guiding perspective for TEEBAgriFood’s development of a comprehensive Evaluation Framework for the eco-agri-food system. Many dimensions of the eco-agri-food system create complex analytical and policy challenges. Systems thinking allows better understanding and forecasting of the outcomes of...
Article
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Background and Aims Large clades of angiosperms are often characterized by diverse interactions with pol-linators, but how these pollination systems are structured phylogenetically and biogeographically is still uncertain for most families. Apocynaceae is a clade of >5300 species with a worldwide distribution. A database representing >10 % of speci...
Article
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Plants interact with a diverse array of organisms below and above ground; some interactions with ants allow plants to be protected against herbivorous insects, influencing their growth or reproduction. In addition, indirect plant defenses—such as those mediated by extrafloral nectaries (EFNs)—could be affected by plant root symbionts. However, it i...
Article
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Extensive green roofs (EGR) spaces constitute harsh and stressful growing environments, and consequently a limited range of plants species that can be routinely used there. The habitat template hypothesis suggests that EGR can be analogous as natural environments, what makes native plants as an alternative for these conditions. This paper aimed to...
Poster
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La agricultura intensiva produce grandes extensiones de un único tipo de cultivo, lo cual promueve la pérdida y fragmentación de ecosistemas, y afecta la provisión de servicios ecosistémicos como la polinización de plantas nativas y del cultivo. Cuando la floración del cultivo se produce en un corto período de tiempo representa un pulso masivo de f...
Article
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The aims of the paper are to characterize the ornamental bedding behaviour of selected Glandularia materials, to evaluate breeder and public preferences (PP) of new potential ornamental plants to be introduced in the market and to obtain a ranking with the best-selected materials. After hybrids characterizations through different traits of ornament...
Article
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Hummingbirds are the main pollinators of most bromeliad species, whose nectar traits usually respond to the selective pressures imposed by pollinators. Considering the specialization of hummingbird-pollinated bromeliads, we expect a close relationship between nectar ecophysiology and the needs of the main pollinators. In this sense, we studied the...
Article
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Animal-pollinated flowers may orient resources for competing activities, such as nectar production for attracting flower visitors but then saving nectar (through inhibiting nectar production or by final resorption) for the subsequent maturation of fruits and seeds. Nectar production is continuous in Nicotiana longiflora and N. alata after flower op...
Article
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Forest loss and fragmentation can affect food resources consumed by different avian groups. A better knowledge on the relationships between different proxies of forest fragmentation and food resources consumed by a wide diversity of avian species can help us understand the indirect effects of forest fragmentation on bird populations. We worked in f...
Article
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La pérdida y fragmentación del bosque pueden alterar la abundancia de recursos alimentarios que consumen distintos grupos de aves. Estudiar cómo se relacionan distintos indicadores de la fragmentación con la abundancia de alimentos consumidos por una amplia diversidad de aves puede ayudar a entender los efectos indirectos de la fragmentación del bo...
Article
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As part of the breeding program of Glandularia (Verbenaceae), here we performed interspecific crosses to select the most outstanding materials and define trait associations for descriptors related to ornamental performance. The experimental material consisted of populations of three species of Glandularia and their offspring. Crosses were obtained...
Article
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We investigated composition and secretion patterns of nectar in the Brazil nut tree (Bertholletia excelsa) and visitation patterns and glossa length of the main flower visitors along the anthesis, aiming to understand the implications for pollination and fruit production. Nectar sugar composition was dominated by sucrose and nectar secretion was co...
Article
The flowers of most Anacardiaceae have a floral nectary disk producing nectar rich in sugars. However, a recent study demonstrated that their nectaries might also produce other substances, including lipids and phenolic compounds. To explore the diversity of floral nectary production and (ultra)structure, and their potential for the systematics of A...
Article
The flowers of most Anacardiaceae have a floral nectary disk producing nectar rich in sugars. However, a recent study demonstrated that their nectaries might also produce other substances, including lipids and phenolic compounds. To explore the diversity of floral nectary production and (ultra)structure, and their potential for the systematics of A...
Article
In island-like habitats, geographic isolation facilitates population and species divergence by constraining gene flow, while environmental isolation can enhance divergence. We tested the relative contribution of geographic and environmental isolation in genetic and phenotypic divergence within and between two species of the figwort Ameroglossum (Sc...
Article
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Forest fragmentation threatens bird species throughout the world. Previous studies suggest that the sensitivity of bird species to forest fragmentation is related to food abundance, and that this could be a key factor in understanding demographic changes. We assessed the relationship between forest fragment size, isolation and food abundance and th...
Article
Agriculture based on transgenic crops has expanded in Argentina into areas formerly occupied by Chaco forest. Even though glyphosate is the herbicide most widely used in the world, increasing evidence indicates severe ecotoxicological effects on non-target organisms as native plants. The aim of this work is to determine glyphosate effects on 23 nat...
Article
Fungi are organisms with important roles in ecosystem functioning and services, but knowledge about how habitat fragmentation affect fungal diversity is biased by experimental approaches and it is spread in different trophic groups. We analyzed the empirical evidences of fungal diversity in fragmented landscapes, and proposed future perspectives fo...
Research
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La soja (Glycine max) es la leguminosa cultivada más importante del mundo y el principal cultivo en Argentina respecto a superficie implantada y producción. El aumento en el área cultivada ha conducido a cambios en el ambiente, disminuyendo la biodiversidad y afectando negativamente a diversos servicios ecosistémicos que son las condiciones y proce...
Article
This study reports the influence of habitat on floral (flower and nectar characteristics, phenology) and pollination biology (flower visitors and breeding system) on Callistemon citrinus (syn. Callistemon lanceolatus), an Australian species of family Myrtaceae. In India, this small ornamental tree is cultivated in gardens, avenues and road sides an...
Article
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article that has already been published in <Current Opinion in Microbiology, 37, June 2017 61-66>, http://dx.doi.org/10.1016/j.mib.2017.03.015 has been withdrawn at the request of the edit...
Article
Frugivorous birds are key dispersal agents of many plant species and also may facilitate seed germination after gut passage. However, the general effects of gut passage on seed germination are still not clear, with positive, negative, and neutral effects reported on seed germination. We evaluated seed germination of seven bird-dispersed plant speci...
Article
Earlier this year, the first global thematic assessment from the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) evaluated the state of knowledge about pollinators and pollination ( 1 , 2 ). It confirmed evidence of large-scale wild pollinator declines in northwest Europe and North America and identified dat...
Technical Report
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Most of the world’s wild flowering plants (87.5%) are pollinated by insects and other animals (established but incomplete), more than three quarters of the leading types of global food crops can benefit, at least in part, from animal pollination (well established) and it is estimated that about one-third of global food volume produced similarly ben...
Article
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We studied the genetic diversity and structure of the Tillandsia capillaris complex, a morphologically diverse group of highly specialized epiphytes, across the distribution range in arid mountain regions of central Peru, Chile, Bolivia and central Argentina. To elucidate the phylogenetic relationships in the complex and to explore the taxon bounda...