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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 ...
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 ...
Impact of microphallid trematodes on the survivorship, growth, and reproduction...
Ferreira, S. M.; Jensen, K. T.; Martins, P. A.; Sousa, S. F.; Marques, J. C.; Pardal, M. A.Crustaceans are second intermediate hosts to several microphallid species (Trematoda). Some of these parasites are potentially pathogenic or manipulative. A laboratory experiment was performed to assess the impact of microphallids on the survival, growth and fecundity of Cyathura carinata, a protogynous hermaphroditic isopod, widespread within European estuaries. For nearly 12 weeks, experimental populations of...
Management of a shallow temperate estuary to control eutrophication: The effect...
Lillebø, A. I.; Neto, J. M.; Martins, I.; Verdelhos, T.; Leston, S.; Cardoso, P. G.; Ferreira, S. M.; Marques, J. C.; Pardal, M. A.The Mondego estuary, a shallow warm-temperate intertidal system located on the west coast of Portugal, has for some decades been under severe ecological stress, mainly caused by eutrophication. Water circulation in this system was, until 1998, mainly dependent on tides and on the freshwater input of a small tributary artificially controlled by a sluice. After 1998, the sluice opening was effectively minimised t...
Population dynamics of Cyathura carinata (Isopoda) in a eutrophic temperate est...
Ferreira, S. M.; Pardal, M. A.; Lillebø, A. I.; Cardoso, P. G.; Marques, J. C.From January 1993 to September 1995, Cyathura carinata was a target species of a monitoring programme carried in the Mondego Estuary (Portugal). Being one of the key species of the intertidal mud flats, this isopod was found to be most abundant in a eutrophic area, where seasonal macroalgal blooms usually occur. Its density decreased towards downstream areas, where some Zostera noltii beds exist. At the Mondego...
Dynamic changes in seagrass assemblages under eutrophication and implications f...
Cardoso, P. G.; Pardal, M. A.; Lillebø, A. I.; Ferreira, S. M.; Raffaelli, D.; Marques, J. C.Over the last 20 years, loss of seagrass beds, often related with increased eutrophication, became a common problem worldwide. In the Mondego estuary (Portugal), eutrophication has triggered serious biological changes, which led to an overall increase in primary production and to a progressive replacement of seagrass Zostera noltii beds by coarser sediments and opportunistic macroalgae. ; http://www.scienced...
The effect of different primary producers on Hydrobia ulvae population dynamics...
Cardoso, P. G.; Lillebø, A. I.; Pardal, M. A.; Ferreira, S. M.; Marques, J. C.The effect of macroalgal blooms and the consequent disappearance of Zostera noltii meadows on Hydrobia ulvae population dynamics and production was studied in the Mondego estuary based on data obtained from January 1993 to September 1995. Sampling was carried out at a non-eutrophicated area, covered with Z. noltii, and also at an eutrophicated area, where seasonal Enteromorpha spp. blooms occur. ; http://www...
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