Encontrados 34 documentos, a visualizar página 1 de 4
Histopathology of Zinc exposition in Actinia equina L. (Anthozoa, Actiniaria)
Gadelha, J; Ferreira, C; Soares, AMVM; Pereira, ML; Morgado, FZinc is a trace metal that is regularly found at pollution sites, amongst other metals and pollutants, contributing to the toxicity of marine ecosystems. In this study zinc acute toxicity tests were conducted on the sea anemone Actinia equina. This sea anemone presents a wide geographic distribution on rocky shore marine habitats, is quite resistant to some degree of various forms of contaminants and plays an i...
Interaction between density and Cu toxicity for Enchytraeus crypticus and Eisen...
Menezes-Oliveira, VB; Scott-Fordsmand, JJ; Rocco, A; Soares, AMVM; Amorim, MJBEffect assessment is usually based on responses obtained from standard tests, in which organisms are well fed and in an optimal population density. For a more thorough assessment of ecotoxicological risk, information is needed for chemical effects in systems that closer reflect the potential exposure in the field systems. Responses measured in standard density experiments do not fully reflect the field scenario...
Growth rate of Pseudokirchneriella subcapitata exposed to herbicides found in s...
Perez, J; Domingues, I; Soares, AMVM; Loureiro, SPrevious work showed the existence of ecotoxicity of water samples from the Alqueva reservoir due to the presence of the herbicides atrazine, simazine, terbuthylazine and metolachlor. In the present study we examine the effects of these herbicides singly and as binary mixtures on the growth rate of the microalgae Pseudokirchneriella subcapitata. Usually, the toxicity of mixtures is evaluated in relation to the ...
Behaviour and Growth of Chironomus riparius Meigen (Diptera: Chironomidae) unde...
Azevedo-Pereira, HMVS; Lemos, MFL; Soares, AMVMImidacloprid is a new insecticide that mimics nicotine, combining its insecticidal activity with a reduced persistence in the environment. The toxicity of imidacloprid to Chironomus riparius Meigen using the formulated product ConfidorA (R) from BayerA (R), in pulse and continuous exposure, was evaluated in this study. The behavioural response of the midge after toxicant exposure using an online biomonitor was ...
Multi-biochemical responses of benthic macroinvertebrate species as a complemen...
Damasio, J; Fernandez-Sanjuan, M; Sanchez-Avila, J; Lacorte, S; Prat, N; Rieradevall, M; Soares, AMVM; Barata, CBiological indexes, based on benthic macroinvertebrate taxa, are currently used worldwide to measure river ecological quality. These indexes assign a global ecological status of the biotic community, but not necessarily may detect specific effects of water pollutants. Conversely a large set of biochemical markers measured in macroinvertebrate benthic species can detect sublethal effects and inform us about addi...
Life-history consequences of adaptation to pollution. "Daphnia longispina clone...
Agra, AR; Soares, AMVM; Barata, CThe present study was conducted to assess life history effects of adaptation to pollution in Daphnia longispina clones historically exposed to an acid mine drainage from an abandoned pyrite mine. Four sensitive and resistant clones from reference and impacted populations were exposed to a range of copper exposure levels and their life history and physiological responses in terms of survival, reproduction, respi...
Is ultraviolet radiation a synergistic stressor in combined exposures? The case...
Ribeiro, F; Ferreira, NCG; Ferreira, A; Soares, AMVM; Loureiro, SThe toxicological assessment of chemical compounds released to the environment is more accurate when mixtures of chemicals and/or interactions between chemicals and natural stressors are considered. Ultraviolet radiation can be taken as a natural stressor since the levels of UV are increasing due to the decrease of its natural filter, the stratospheric ozone concentration. Therefore, a combination of chemical e...
Lecanora sorediomarginata, a new epiphytic lichen species discovered along the ...
Rodrigues, SA; Terron-Alfonso, A; Elix, JA; Perez-Ortega, S; Tonsberg, T; Fernandez-Salegui, AB; Soares, AMVMLecanora sorediomarginata Rodrigues, Terron & Elix sp. nov., described as new to science from Portugal, is characterized morphologically by a crustose whitish-grey to greenish thallus developing soralia from small, marginal warts and chemically by the presence of 3,5-dichloro-2'-O-methylnorstenosporic acid [major], 3,5-dichloro-2'-O-methylanziaic acid [minor], 3,5-dichloro-2'-O-methylnordivaricatic acid [minor]...
Private forest reserves can aid in preserving the community of medium and large...
Negroes, N; Revilla, E; Fonseca, C; Soares, AMVM; Jacomo, ATA; Silveira, LDue to the advancing agricultural frontier in the Brazilian Amazon, the present rate of deforestation engenders a pessimistic scenario for vertebrate diversity in the area. Protected areas are an essential conservation tool to limit biodiversity loss, but their efficiency have yet to be proven. Here, we used camera-trap data on the presence of medium and large-size vertebrates in a protected area (Canto State P...
Chrysothrix flavovirens, Lepraria elobata, and Ochrolechia arborea new to Portugal
Rodrigues, SA; Tonsberg, T; Terron-Alfonso, A; Soares, AMVMChrysothrix flavovirens, Lepraria elobata, and Ochrolechia arborea are reported as new to Portugal, based on surveys carried out in pine forests along the Portuguese coast. Data on the distribution, secondary products and ecology of the species are presented.