Encontrados 17 documentos, a visualizar página 1 de 2
Uptake and depuration of PCB-153 in edible shrimp Palaemonetes varians and huma...
Grilo, T. F.; Cardoso, P. G.; Pato, P.; Duarte, A. C.; Pardal, M. A.A medium-term mesocosm exposure study was conducted to elucidate bioaccumulation and depuration of polychlorinated biphenyl congener 153 (PCB-153) in edible shrimp Palaemonetes varians. Over the 15-day exposure period, shrimp under different exposure concentrations exhibited a significant increase in PCB153 concentration compared with control organisms. Distinct bioaccumulation patterns and uptake rates ...
Mercury bioaccumulation and the population dynamics of Mesopodopsis slabberi (C...
D'Ambrosio, M.; Marques, S. C.; Azeiteiro, U. M.; Pardal, M. A.; Pereira, E.; Duarte, A. C.; Cardoso, P. G.The mercury bioaccumulation and population dynamics of the mysid Mesopodopsis slabberi was assessed along a mercury gradient in Ria de Aveiro (Portugal). M. slabberi is one of the most important mysid species in European temperate coastal shallow waters playing a key ecological role. Nevertheless, no references were found concerning the possible consequences of the Hg on the trophodynamics of these coastal ecos...
Impact of mercury contamination on the population dynamics of Peringia ulvae (G...
Cardoso, P. G.; Sousa, E.; Matos, P.; Henriques, B.; Pereira, E.; Duarte, A. C.; Pardal, M. A.The effects of mercury contamination on the population structure and dynamics of the gastropod Peringia ulvae (also known as Hydrobia ulvae) and its impact on the trophic web were assessed along a mercury gradient in Ria de Aveiro (Portugal). The gastropod was revealed to be a tolerant species to the contaminant, since the highest densities, biomasses and growth productivity values were recorded at the intermed...
Long-term changes in the production by estuarine macrobenthos affected by multi...
Dolbeth, M.; Cardoso, P. G.; Grilo, T. F.; Bordalo, M. D.; Raffaelli, D.; Pardal, M. A.The macrobenthic production of an estuarine system was evaluated over a 14-year study period in a seagrass bed and in a sandflat. Over this period, the estuary suffered severe eutrophication and extreme weather events with important impacts on the community, impairing system functioning and ultimately the goods and services provided by the estuary (decline in the seagrass bed, decreased community production and...
The impact of extreme weather events on the seagrass Zostera noltii and related...
Cardoso, P. G.; Raffaelli, D.; Pardal, M. A.Coastal areas are typically subjected to a range of stressors, but they now face the additional stressor of climate change, manifested in part by an increased intensity and frequency of extreme weather events. Thus, the Mondego estuary (Portugal) has experienced organic enrichment (eutrophication) issues and these are potentially exacerbated by extreme weather events (floods, droughts and heat waves). In this p...
Influence of bioturbation by Hediste diversicolor on mercury fluxes from estuar...
Cardoso, P. G.; Lillebø, A. I.; Lopes, C. B.; Pereira, E.; Duarte, A. C.; Pardal, M. A.Mercury, with its reactive forms being the most deleterious for the trophic chains, has been identified as a major pollutant in a few confined bodies of the coastal zone. Due to feeding, burrowing, and bioirrigation activities, infauna are known to play a crucial role in the biogeochemical processes of contaminants. The main goal of the present study is to evaluate the effects of Hediste diversicolor bioturbati...
The impact of extreme flooding events and anthropogenic stressors on the macrob...
Cardoso, P. G.; Raffaelli, D.; Lillebø, A. I.; Verdelhos, T.; Pardal, M. A.Marine and coastal environments are among the most ecologically and socio-economically important habitats on Earth. However, climate change associated with a variety of anthropogenic stressors (e.g. eutrophication) may interact to produce combined impacts on biodiversity and ecosystem functioning, which in turn will have profound implications for marine ecosystems and the economic and social systems that depend...
Anthropogenic and natural disturbance effects on a macrobenthic estuarine commu...
Dolbeth, M.; Cardoso, P. G.; Ferreira, S. M.; Verdelhos, T.; Raffaelli, D.; Pardal, M. A.For some decades, the Mondego estuary has been under severe ecological stress, mainly caused by eutrophication. The most visible effect was the occurrence of macroalgal blooms and the concomitant decrease of the area occupied by Zostera noltii beds. Since the end of 1998, mitigation measures were implemented in the estuary to promote the recovery of the seagrass beds and the entire surrounding environment. The ...
Polychaete assemblages as indicators of habitat recovery in a temperate estuary...
Cardoso, P. G.; Bankovic, M.; Raffaelli, D.; Pardal, M. A.From 1980 to 2000, the Mondego estuary (Portugal) suffered dramatic changes due to eutrophication, leading to a decline in seagrass beds and changes in community structure, namely a decline in species richness and replacement of herbivores by detritivores. Because the conservation status of the estuary was being compromised, a restoration project was implemented in 1998 in order to restore the original natural ...
Annual production of estuarine fauna in different environmental conditions: An ...
Dolbeth, M.; Lillebø, A. I.; Cardoso, P. G.; Ferreira, S. M.; Pardal, M. A.Secondary production is one of the most comprehensive measurements of ecosystem health. Production of five estuarine species, with different life history and abundance in the ecosystem, was estimated for 2 consecutive years at a Zostera noltii bed and sand-muddy area, with contrasted environmental conditions. Calculations were performed using different estimation methods, commonly cited in secondary production ...
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