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Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Instituto de Biociências (IB) (Institutional affiliation from the last research proposal) Birthplace: Brazil
Márcio Silva Araújo in research grants and scholarships supported by FAPESP.
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Within-population niche variation can be attributed to individual specialization (IE), a type of ecological variation characterized by the presence of individuals whose niches are subsets of the population niche. Mechanisms underlying IE include functional trade-offs associated with morphology, physiology, and behavior as well as extrinsic factors such as intra- and interspecific competit…
The objective of the present proposal is to describe the patterns of genetic and morphological variation in populations of the tetrafish Astyanax lacustris in the floodplains of southern Pantanal in the state of Mato Grosso do Sul and to infer the relative roles of gene flow and local adaptation in the origin of this variation. The tetrafish A. lacustris is a small species (up to 12 cm TL…
Generalist populations can be formed by highly specialized individuals, whose niches are small subsets of the population niche. This "individual specialization" in turn may have important ecological and evolutionary implications. In spite of the large number of empirical examples in the literature, we still know little about the ecological mechanisms generating and maintaining this phenom…
Most studies in ecology treat conspecific individuals as equivalent. However, many studies have found that individuals from the same population may use different subsets of the resources used by the population, which was defined as "individual specialization". Frugivorous bats are important seed dispersers and individual specialization in the use of space and diet can have consequences fo…
Although having intrigued ecologists for more than half a century, the coexistence of species is still strongly debated in community ecology. The diversity paradox is based on the contrast between the huge number of species coexisting in nature versus the small number predicted by competition theories. Classical models suggest that species must be sufficiently different to coexist, but in…
In the present study, we will test predictions from the theory regarding the effect of predation on life-history evolution, using the poecilid fish Poecilia vivipara as a model system. We will investigate populations of P. vivipara inhabiting the Parque Nacional da Restinga de Jurubatiba, which is part of the lagoon system of northern Rio de Janeiro state. In this system, P. vivipara is s…
The multidimensional concept of niche has permeated most of theories in ecology. However, theory and empirical studies on individual niche specialization still rely on one-dimensional approaches to understand the causes and consequences of intraspecific ecological diversity in natural communities. In this proposal we aim to conciliate the classic multidimensional niche concept with the em…
The motivation of this internship is learning about movement ecology analysis and ecological modeling focused on interindividual variation. The main goal includes developing models that couple individual specialization to movement. To achieve this purpose, we will use the frugivorous bat Sturnira lilium as a model species. We will analyze radiotelemetry data that are being collected at th…
How similar species coexist in nature has intrigued ecologists by more then half-century. Recently, this field has received important theoretical contributions, outstandingly the idea that not only niche differences determine the output of species coexistence, but also the magnitude of average fitness dissimilarities. However, the modern coexistence framework still neglecting the intraspe…
| 1 / 1 | Ongoing grants |
| 3 / 2 | Completed research grants |
| 6 / 3 | Completed scholarships in Brazil |
| 4 / 3 | Completed scholarships abroad |
| 14 / 9 | All research grants and scholarships |
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