A5071400191- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Plant Parasitism and Resistance
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Animal Ecology and Behavior Studies
- Species Distribution and Climate Change
- Mediterranean and Iberian flora and fauna
- Wildlife-Road Interactions and Conservation
- Gastrointestinal disorders and treatments
- Plant Taxonomy and Phylogenetics
- Land Use and Ecosystem Services
- Evolution and Genetic Dynamics
- Botany, Ecology, and Taxonomy Studies
- Pancreatitis Pathology and Treatment
- Insect-Plant Interactions and Control
- Pancreatic and Hepatic Oncology Research
- Wildlife Ecology and Conservation
- Evolutionary Game Theory and Cooperation
- Fern and Epiphyte Biology
- Evolution and Paleontology Studies
- Ecosystem dynamics and resilience
- Plant Physiology and Cultivation Studies
- Ecology and Conservation Studies
- Gallbladder and Bile Duct Disorders
Universidad Nacional de Cuyo
2016-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
Instituto Argentino de Investigaciones de las Zonas Aridas
2014-2024
Centro Científico Tecnológico - Mendoza
2007-2024
Weatherford College
2024
Instituto Argentino de Diagnóstico y Tratamiento
2019-2024
Hospital Universitari Arnau de Vilanova
2024
University of Freiburg
2017-2023
National Research Council
2023
University of Buenos Aires
1996-2022
Abstract Introduced plant populations lose interactions with enemies, mutualists and competitors from their native ranges, gain new species, under abiotic conditions. From a biogeographical perspective, differences in the assemblage of interacting as well conditions, may explain demographic success introduced relative to conspecifics range. Within invaded communities, conditions experienced by invader influence both its effects on biodiversity. Here, we examine indirect involving plants,...
The strength of interactions among species in a network tends to be highly asymmetric. We evaluate the hypothesis that this asymmetry results from distribution abundance species, so occur randomly individuals. used database on mutualistic and antagonistic bipartite quantitative interaction networks. show across all types networks was correlated with abundance, rare were asymmetrically affected by their abundant partners, while pairs interacting tended exhibit more symmetric, reciprocally...
Abstract We evaluate whether species interaction frequency can be used as a surrogate for the total effect of on another. Because is easier to estimate than per‐interaction effect, using could facilitate large‐scale analysis quantitative patterns species‐rich networks. show mathematically that correlation between ( I ) and T becomes more strongly positive greater variation relative P . A meta‐analysis data , animal pollinators seed dispersers visiting plants shows generally strong,...
The structure of ecological interaction networks is often interpreted as a product meaningful and evolutionary mechanisms that shape the degree specialization in community associations. However, here we show both unweighted network metrics (connectance, nestedness, distribution) weighted (interaction evenness, strength asymmetry) are strongly constrained biased by number observations. Rarely observed species inevitably regarded "specialists," irrespective their actual associations, leading...
Although specialization in species interactions has usually been equated to reciprocal specialization, asymmetric (i.e., a specialist interacting with generalist) is also likely. Recent studies have suggested that could be more common than previously thought. We contrasted patterns of observed 18 plant–pollinator interaction webs predictions based on null models. found interactions, and its occurrence frequent expected under simple model assumed random among species; furthermore, large...
The structure of mutualistic networks is likely to result from the simultaneous influence neutrality and constraints imposed by complementarity in species phenotypes, phenologies, spatial distributions, phylogenetic relationships, sampling artifacts. We develop a conceptual methodological framework evaluate relative contributions these potential determinants. Applying this approach analysis plant-pollinator network, we show that information on abundance phenology suffices predict several...
Summary 1. The study of plant–pollinator interactions in a network context is receiving increasing attention. This approach has helped to identify several emerging patterns such as nestedness and modularity. However, most studies are based only on qualitative information, some ecosystems, deserts tropical forests, underrepresented these data sets. 2. We present an exhaustive analysis the structure 4‐year from Monte desert Argentina using quantitative tools. describe this evaluate sampling...
Niche breadth of species has been hypothesized to be associated with species' responses disturbance. Disturbance is usually believed affect specialists negatively, while generalists are benefit from disturbance; we call this the "specialization‐disturbance" hypothesis. We also propose an hypothesis (the "specialization‐asymmetry‐disturbance" hypothesis) under which both specialization and asymmetry interactions would explain test these hypotheses using data a plant‐pollinator system that...
We examine Robert MacArthur's hypothesis that niche breadth is positively associated with latitude (the latitude–niche hypothesis). This idea has been influential and long standing, yet no studies have evaluated its generality or the validity of assumptions. review theoretical arguments suggesting a positive relationship between latitude. also use available evidence to evaluate assumptions predictions hypothesis. find neither nor are supported by data. propose an alternative linking breadth....
1 Recent studies have evaluated the distribution of specialization in species interaction networks. Species abundance patterns been hypothesized to determine observed topological patterns. We evaluate this hypothesis context host–parasite 2 used two independent series data sets, one consisting for seven sites describing interactions between freshwater fish and their metazoan parasites another 25 localities fleas mammalian hosts. influence on these networks with aid null models. 3 In parallel...
Recent studies have suggested that plant–pollinator interactions may be less specialized than previously thought. We contrasted patterns of specialization observed in five interaction webs with predictions based on null models. In the data sets, number extreme specialists and generalists was significantly higher expectation. This pattern mostly due to a positive correlation between species frequency (f) their estimated degree generalization (s). After accounting for this association,...
Summary Invasive, alien plants and pollinators have varying effects on their interaction partners, ranging from highly beneficial to strongly detrimental. To understand these contrasting impacts, we review the benefits costs associated with plant–pollinator interactions enquire as how presence of abundant invaders affects benefit–cost balance. We provide a conceptual framework that predicts mutualism shifts antagonism when increase disproportionally in abundance relative partners. This...
Abstract Ecological interactions are highly dynamic in time and space. Previous studies of plant–animal mutualistic networks have shown that the occurrence varies substantially across years. We analyzed interannual variation a quantitative network, which links weighted by interaction frequency. The network was sampled over six consecutive years, representing one longest series for community‐wide network. estimated similarity assessed determinants their persistence. varied greatly among with...
A frequent observation in plant-animal mutualistic networks is that abundant species tend to be more generalised, interacting with a broader range of interaction partners than rare species. Uncovering the causal relationship between abundance and generalisation has been hindered by chicken-and-egg dilemma: by-product being abundant, or does high result from generalisation? Here, we analyse database plant-pollinator plant-seed disperser networks, provide strong evidence link uni-directional....
The study of mutualistic interaction networks has led to valuable insights into ecological and evolutionary processes. However, our understanding network structure may depend upon the temporal scale at which we sample analyze data. To date, lack a comprehensive assessment scale‐dependence across wide range scales geographic locations. If is temporally scale‐dependent, constructed over different provide very perspectives on composition species interactions. Furthermore, it remains unclear how...