Artigos científicos, teses e dissertações
Publicados nas melhores instituições de ensino

Our ability to identify cost-efficient priorities for conserving biological diversity is limited by the scarcity of data on conservation costs, particularly at fine scales. Here we address this issue using data for 139 terrestrial programs worldwide. We find that the annual costs...

Conservation of mayflies (Insecta, Ephemeroptera) in Espírito Santo, southeastern Brazil. Ephemeroptera exhibits great diversity among bodies of freshwater in the Atlantic Forest, a biome that is suffering from massive human impact. Within this context, the creation of conservati...

Most of the analyses on the conservation of gene order are limited to orthologous genes. However, the organization of genes into operons might also result in the conservation of gene order of paralogous genes. Thus, we sought computational evidence that conservation of gene order...

Despite methodological and theoretical advances in conservation genetics, data on genetic variation on broad regional spatial scales are still scarce, leading conservation planners to use general heuristic or simulation models for an integrated analysis of genetic, demographic an...

ABSTRACT Land-use change is the main cause of biodiversity losses, and for grasslands includes changes in management. The last 10 years has seen afforestation of traditionally grazed grasslands increase considerably in the understudied Serra do Sudeste region of the Brazilian Pam...

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We discuss first-order systems of nonlinear conservation laws which have as a consequence an additional conservation law. We show that if the additional conserved quantity is a convex function of the original ones, the original system can be put into symmetric hyperbolic form. Ne...

Human pressure threatens many species and ecosystems, so conservation efforts necessarily prioritize saving them. However, conservation should clearly be proactive wherever possible. In this article, we assess the biodiversity conservation value, and specifically the irreplace...

The stoichiometric relations in a series of biochemical reactions are summarized by a stoichiometric number matrix (with a column for each reaction) and a conservation matrix (with a row for each constraint). These two matrices for a series or cycle of biochemical reactions are r...

Systematic conservation planning is a branch of conservation biology that seeks to identify spatially explicit options for the preservation of biodiversity. Alternative systems of conservation areas are predictions about effective ways of promoting the persistence of biodiver...

Abstract: The aim of this study was to determine how often rural farmers in a watershed use no-tillage systems combined with crop rotation, contour farming and agricultural terraces. The study area was Paraná Watershed III (PB3) in the western region of Paraná State, and data fro...

The research proposal is to evaluate the research and intervention projects funded by the National Environmental Fund, between 1990 and 2003. Usually, evaluation research concern is on changing socioeconomic projects, but here it is used to understand the research and interventio...

Species evolutionary relationships have traditionally been defined by sequence similarities of phylogenetic marker molecules, recently followed by whole-genome phylogenies based on gene order, average ortholog similarity or gene content. Here, we introduce genome conservation—a n...

The aim of this work is the study of robust numerical techniques for approximating the solution of scalar and systems of hyperbolic conservation laws. To achieve this, we studied conservative schemes with special properties, such as, schemes upwind, TVD, Godunov, flux limiters an...

To gauge the complexity of gene regulation in yeast, it is essential to know how much promoter sequence is functional. Conservation across species can be a sensitive means of detecting functional sequences, provided that the significance of conservation can be accurately calibrat...

Post-transcriptional regulation and the formation of mRNA 3′ ends are crucial for gene expression in eukaryotes. Interspecies conservation of many sequences within 3′UTRs reveals selective constraint due to similar function. To study the pattern of conservation within 3′UTRs, we ...

ABSTRACT Much of the Brazilian semiarid region faces a considerable process of degradation of natural resources, and ethnobotanical studies have collaborated with important information about the use and traditional knowledge, serving as a tool to design conservation strategies of...

This work is on Conservation Units aiming to study the technical and legal nature of the Management councils of the environmentally protected areas in Brazil. The objective was to analyze the legislation that established them, their current nature, composition and functioning and...

The objective of this paper is to contribute to the discussion about different strategies for nature conservation, confronting the predominant model based in protected areas with other alternatives, developed to overcome the problems and conflicts generated by this model, especia...

The purpose of this work was to evaluate the physiological characteristics of ripening and to describe the potential conservation of fresh-cut Firme and Alambra mutant tomatoes (long life), in relation to Santa Clara (normal) and F1 (Firme x Santa Clara) tomatoes. Fruits were har...

In this paper, we review some past and present trends in biodiversity conservation in Mexico and explore possible explanations of why, in spite of this long history of depredation and ineffective conservation policies, the ecosystems have been able to cope with and retain mos...