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Long term variation of an amphipod species’ population secondary production as ...

During the last decades many estuaries underwent ranges of environmental pressure due to increasing anthropogenic pressures and the undertaken of mitigation measures to prevent the impoverishment of these areas. The Mondego estuary (NW Atlantic coast of Portugal), a mesotidal shallow estuary, is one typical case of this. In the 1980s, the system was characterized by rich and stable animal and vegetal communitie...

Macrofaunal community abundance and diversity and talitrid orientation as poten...

In the last decades the increasing urban development on coastal areas have produced extensive modifications on shores all over the world, making critical the active management of pressures on sandy beaches. The use of engineering solutions to counteract beach erosion has been significantly increasing; the ecological indicators used to monitor these interventions generally focus on short- and medium-term effects...

Niche segregation amongst sympatric species at exposed sandy shores with contra...

Wrack supplies (macroalgae, seagrasses and carrion) are a common feature of sandy beaches worldwide. These allochthonous inputs are a potential high-quality food subsidy for beach fauna, but little is known about the feeding ecology and niche segregation strategies of these species in beaches with limited wrack availabilities. We used stable isotopic ratios of nitrogen and carbon to examine the diets and niche ...

Linking biodiversity indicators, ecosystem functioning, provision ofservices an...

Assuming that human well-being strongly relies on the services provided by well-functioning ecosys-tems, changes in the ecological functioning of any system can have direct and indirect effects on humanwelfare. Intensive land use and tourism have expanded in recent decades along coastal ecosystems,together with increasing demands for water, food and energy; all of these factors intensify the exploita-tion of na...

Predicting the variation in Echinogammarus marinus at its southernmost limits u...

Understanding the environmental parameters that constrain the distribution of a species at its latitudinal extremes is critical for predicting how ecosystems react to climate change. Our first aimwas to predict the variation in the amphipod populations of Echinogammarus marinus from the southernmost limit of its distribution under global warming scenarios. Our second aim was to test whether sex-ratio fluctuatio...

Adesão à terapêutica anti-retrovírica - VIH: determinação dos principais fatore...

Trabalho de projeto de mestrado em Estatística e Investigação Operacional, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 ; Introdução: O tratamento anti-retovírico tem contribuído significativamente para a redução da morbilidade e mortalidade em indivíduos infetados pelo VIH, principalmente, a partir de 1996, com a introdução da terapia anti-retroviral combinada (TARc). Todavia, ...

The importance of habitat-type for defining the reference conditions and the ec...

Coastal lagoons are complex systems, with considerable habitat heterogeneity and often subject to high temporal dynamics, which constitutes a great challenge for ecological assessment programs. For defining reference conditions for benthic invertebrates, under the EU Water Framework Directive objectives, historical data from the Ria Formosa leaky lagoon (wet surface area of about 105 km2) located in Southern Po...

Feeding diversity index as complementary information in the assessment of ecolo...

The feeding diversity of macroinvertebrates from the estuary of Mondego was estimated with Shannon–Wiener complementary evenness following the methodology presented in Gamito and Furtado (2009. Ecological Indicators, 9: 1009-1019). Results were compared with those from BAT (Benthic Assessment Tool; Teixeira et al., 2009. Marine Pollution Bulletin, 58: 1477-1786) applied to the same data set, obtained from sampl...

Ecological integrity assessment, ecosystem-based approach, and integrative meth...

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