80 research outputs found
Editorial: Freshwater biodiversity crisis: Multidisciplinary approaches as tools for conservation
TAXAS DE RECUPERAĂĂO DE BORO POR EXTRATORES EM SOLOS DA BAHIA E DE MINAS GERAIS, NA PRESENĂA E AUSĂNCIA DE CALAGEM
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Intermediate predator naïveté and sex-skewed vulnerability predict the impact of an invasive higher predator
The spread of invasive species continues to reduce biodiversity across all regions and habitat types globally. However, invader impact prediction can be nebulous, and approaches often fail to integrate coupled direct and indirect invader effects. Here, we examine the ecological impacts of an invasive higher predator on lower trophic groups, further developing methodologies to more holistically quantify invader impact. We employ functional response (FR, resource use under different densities) and prey switching experiments to examine the trait- and density-mediated impacts of the invasive mosquitofish Gambusia affinis on an endemic intermediate predator Lovenula raynerae (Copepoda). Lovenula raynerae effectively consumed larval mosquitoes, but was naĂŻve to mosquitofish cues, with attack rates and handling times of the intermediate predator unaffected by mosquitofish cue-treated water. Mosquitofish did not switch between male and female prey, consistently displaying a strong preference for female copepods. We thus demonstrate a lack of risk-reduction activity in the presence of invasive fish by L. raynerae and, in turn, high susceptibility of such intermediate trophic groups to invader impact. Further, we show that mosquitofish demonstrate sex-skewed predator selectivity towards intermediate predators of mosquito larvae, which may affect predator population demographics and, perversely, increase disease vector proliferations. We advocate the utility of FRs and prey switching combined to holistically quantify invasive species impact potential on native organisms at multiple trophic levels
Genesis and Classification of Soils Containing Carbonates in a Toposequence of the BambuĂ Group
Promoção da saĂșde da mulher brasileira e a alimentação saudĂĄvel: vozes e discursos evidenciados pela Folha de SP
PrevalĂȘncia da abstinĂȘncia ao tabaco de pacientes tratados em unidades de saĂșde e fatores relacionados
Epidemiological study on leishmaniasis in an area of environmental tourism and ecotourism, State of Mato Grosso do Sul, 2006-2007
Small size today, aquarium dumping tomorrow: sales of juvenile non-native large fish as an important threat in Brazil
Pai pobre, filho pobre? Uma anĂĄlise da mobilidade intergeracional de renda na coorte de nascimentos de 1982, Pelotas, Rio Grande do Sul, Brasil
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