Consulta: creatorFacets:"Azevêdo,Evaldo de Lira"
Registros recuperados: 4
Data/hora: 05/06/2024 00:39:39

Predation effects of Melanoides tuberculatus Müller 1774) on periphytic biofilm colonization: an experimental approach
Provedor de dados: 49
Autores: Vasconcelos,Janiele França; Barbosa,José Etham de Lucena; Azevêdo,Evaldo de Lira; Azevêdo,Daniele Jovem da Silva; Anacleto,Maria José Pinheiro.
The present study evaluated the predation effects of the gastropod Melanoides tuberculatus on the taxa richness and density of the periphyton community. A laboratory experiment was conducted with two treatments: control (without M. tuberculatus) and with M. tuberculatus, each treatment being replicated four times. For periphyton colonization, glass slides were placed in 3.5 L of water from the environment of the gastropods. The analysis of species richness and density of the periphyton community on these artificial substrates showed significant differences (p &lt;0.05) between treatments. In the treatment with M. tuberculatus, taxa richness and density were lower, with a predominance of Chantrasia macrospora in the last days of the experiment. It follows...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasive species; Herbivory; Laboratory experiment; Melanoides tuberculatus; Periphyton.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200096

Effectiveness of abundance and biomass curves in detecting environmental alterations in semi-arid region reservoirs
Provedor de dados: 49
Autores: Medeiros,Carlinda Raílly; Azevêdo,Evaldo de Lira; Barbosa,José Etham de Lucena; Molozzi,Joseline.
Abstract For mitigation of environmental problems generated by bad water resource management, the first step is to develop methods for effective diagnosis. The potential bioindicator, mainly in the benthic community, in the evaluation of water quality is the structure of the community, associated with magnitude of environmental impact. The aim of the present study was to evaluate the effectiveness of abundance biomass curves (ABC) as tools to estimate ecological quality in reservoirs in the Brazilian semi-arid region. Two reservoirs, Epitácio Pessoa and Argemiro de Figueiredo were selected. These reservoirs are located in the watershed of the Paraíba River, in Northeast Brazil. Sampling was done at 40 sites in the littoral region of each reservoir, during...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benthic Macroinvertebrates; Environmental Impact; Biomonitoring; Exotic Species.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200202

Potential ecological distribution of alien mollusk Corbicula largillierti and its relationship with human disturbance in a semi-arid reservoir
Provedor de dados: 49
Autores: Azevêdo,Evaldo de Lira; Barbosa,José Etham de Lucena; Vidigal,Teofânia Heloisa Dutra Amorim; Marques,João Carlos; Callisto,Marcos; Molozzi,Joseline.
The introduction of exotic mollusk species has resulted in loss of biodiversity in semi-arid neotropical aquatic ecosystems. This study aims to relate the presence and density of Corbicula largillierti species to human disturbance, providing data for the conservation and management of aquatic ecosystems. Specimens were collected at Epitácio Pessoa reservoir in December 2011 and June 2012, presenting densities of 20.96 and 62.89 individuals per square meter, respectively. Anthropic disturbance metrics were calculated considering the presence, type and intensity of disturbance in littoral, riparian and flood zones. The occurrence of C. largillierti was mainly associated to the variables total phosphorus (261.05 ± 342.22 µg/L) and total nitrogen (440.79 ±...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corbiculidae; Anthropic disturbance; Environmental quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100107

First record of Corbicula largillierti (Philippi 1844) in the Paraíba River Basin and potential implications from water diversion of the São Francisco River
Provedor de dados: 49
Autores: Azevêdo,Evaldo de Lira; Barbosa,José Etham de Lucena; Vidigal,Teofânia H. D. A.; Callisto,Marcos; Molozzi,Joseline.
Corbicula largillierti is a native mollusk from China. In Brazil, this species was first recorded in the Pantanal of Mato Grosso. This short communication reports the occurrence of C. largillierti for the first time in the Paraíba river basin (Brazilian semi-arid), and also considers the risk of introduction of other molluscs invaders in this basin due to the diversion of water from the São Francisco River. Densities of individuals ranged from 33 to 65 ind.m-2 (maximum values of 484 ind.m-2) in coarse sediment (gravel, 2-4 mm). The diversion of waters from the São Francisco river can lead to the introduction of new species, enhancing ecological problems in the Paraiba river basin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasive species; Semi-arid; Molluscs; Corbiculidae.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000400401