Edge-interior differences in the species richness and abundance of drosophilids in a semideciduous forest fragment

Habitat fragmentation is the main cause of biodiversity loss, as remnant fragments are exposed to negative influences that include edge effects, prevention of migration, declines in effective population sizes, loss of genetic variability and invasion of exotic species. The Drosophilidae (Diptera), especially species of the genus Drosophila, which are highly sensitive to environmental variation, have been used as bioindicators. A twelve-month field study was conducted to evaluate the abundance and richness of drosophilids in an edge-interior transect in a fragment of semideciduous forest in São Paulo State, Brazil. One objective of the study was to evaluate the applied methodology with respect to its potential use in future studies addressing the monitoring and conservation of threatened areas. The species abundance along the transect showed a clear gradient, with species associated with disturbed environments, such as Drosophila simulans, Scaptodrosophila latifasciaeformis and Zaprionus indianus, being collected at the fragment edge and the species D. willistoni and D. mediostriata being found in the fragment's interior. Replacement of these species occurred at approximately 60 meters from the edge, which may be a reflection of edge effects on species abundance and richness because the species found within the habitat fragment are more sensitive to variations in temperature and humidity than those sampled near the edge. The results support the use of this methodology in studies on environmental impacts. © 2013 Penariol and Madi-Ravazzi; licensee Springer.

Checklist of social (polistinae) and solitary (eumeninae) wasps from a fragment of Cerrado campo Sujo in the State of Mato Grosso do sul

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Peircean semiotics and subject indexing: Contributions of speculative grammar and pure logic

The semiotics of C S. Peirce presents fundamental concepts to discover aspects of the indexing process, including representation and classes of signs. However, we still know little of its theoretical potential for subject indexing. We believe that the main difficulty in the proposals to understand the process of subject indexing based on Peircean semiotics stems from an incomplete interpretation of his semiotic system. This paper attempts to describe the contributions of Peircean semiotics to subject indexing. First, we analyze some of the concepts of the branches of semiotics, after which, we discuss strategies for conceptual approximation. Secondly, and aiming to raise the level of interlocution between the areas, we intend to argue that subject indexing is an inferential process, as explained by the second branch of semiotics. Thus, we seek to go beyond the level of speculative grammar, the first branch of semiotics, to forge a closer link with pure or critical logic, the second branch. We conclude that the indexer's work does not produce a mere reflection of what already exists in documents, but involves an instigating action to discover, through the inferential matrix, the meaning of a text in order to find the subject and the most appropriate subject added entry to the information system.

Aspectos institucionales del transporte intermodal internacional: contribuciones de expertos latinoamericanos = Institutional aspects of international intermodal transport: contributions by Latin American experts

Incluye Bibliografía

Proceedings of the Workshop on Issues in the Privatization of Water Utilities in the Americas: contributions

Includes bibliography

Le CELADE et la coopération française: une synergie féconde. Contributions à la connaisance sociodémographique de l'Amérique Latine et des Caraïbes

Inclut la bibliographie

Contributions made by ECLAC from a rights perspective regarding indigenous peoples' and afrodescendants' affairs

Includes bibliography

Contributions made by ECLAC in the field of international migration from a human rights and development perspective: report of the activities of the Commission, 2012-2013

Includes bibliography

Contributions made by ECLAC to follow-up and implementation of the San José Charter on the Rights of Older Persons in Latin America and the Caribbean, 2012-2013

Includes bibliography

Aportes para la evaluación del Decenio de las Naciones Unidas para la Mujer y para el diseño de estrategias hacia el futuro = Contributions to the appraisal of the United Nations Decade for Women and to the design of strategies for the future

Incluye Bibliografía

ICTs and information management (IM) in commercial agriculture: contributions from an evolutionary approach

Includes bibliography