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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...
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 ...
Seagrass beds and intertidal invertebrates: an experimental test of the role of...
Cardoso, P.; Raffaelli, D.; Pardal, M.Abstract The majority of field experiments have been carried out on relatively small spatial and short temporal scales, but some of the most interesting ecological processes operate at much larger scales. However, large-scale experiments appropriate to the landscape, often have to be carried out with minimal plot replication and hence reduced statistical power. Here, we report the results of such a large scale...
Resilience of Hydrobia ulvae populations to anthropogenic and natural disturbances
Cardoso, P. G.; Brandão, A.; Pardal, M. A.; Raffaelli, D.; Marques, J. C.In the Mondego estuary (Portugal), several mitigation measures (nutrient loading reduction, seagrass bed protection and freshwater circulation enhancement) were implemented in 1998 to promote the recovery of the seagrass bed and the entire surrounding environment following a long period of eutrophication. In the present study we evaluate the success of this restoration project, by comparing the water nutrient c...
Macroinvertebrate response to different species of macroalgal mats and the role...
Cardoso, P. G.; Pardal, M. A.; Raffaelli, D.; Baeta, A.; Marques, J. C.Over the last 20 years, the Mondego estuary, Portugal has experienced excessive growth of macroalgae especially in the inner parts of the system, with several algal species implicated. In this study, we compare the effects of morphologically different species, the red alga Gracilaria verrucosa and the green macroalga Enteromorpha intestinalis on macrobenthic assemblages, by a field experiment whereby the biomas...
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...
Assessing environmental quality: a novel approach
Pardal, M. A.; Cardoso, P. G.; Sousa, J. P.; Marques, J. C.; Raffaelli, D.A new approach to assess environmental integrity based on PRC analysis was proposed, tested, validated and developed. Environmental health assessment and community studies usually result in complex biological data sets. In order to find ecologically relevant patterns and tendencies from such sets of data it is necessary to reduce all the information to a summarised and simplified form, which might be more easil...
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