Browsing by Issue Date, starting with "2023-09-27"
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- Implications of warming on the morphometric and reproductive traits of the Green Crab, Carcinus maenasPublication . N. Monteiro, J.; Bueno-Pardo, Juan; Pinto, Miguel; Pardal, Miguel A.; Martinho, Filipe; Miguel de Sousa Leitão, FranciscoUnderstanding the relationship between environmental temperature and the biological traits of organisms is fundamental to inferring the potential impacts of climate change. In the case of marine poikilotherm species, seawater temperature is one of the main driving forces of biological processes, with consequences at higher levels of organization such as population and ecosystem. In this study, we analysed differences in maximum carapace width (CWmax), size at maturation, relative size at maturation, and duration of the reproductive season for the green crab (Carcinus maenas) along a temperature gradient. An extensive review of bibliographic data was performed on studies published between 1962 and 2020, gathering C. maenas data from 55 different populations, spread over 20 degrees of latitude and 14.2 °C of sea surface temperature (SST). In addition, green crab data were collected at five different lagoons and estuaries along the continental Portuguese coast. The relationship between average SST and CWmax, age of maturation, reduction of size at maturation, and duration of egg bearing was analysed to understand the role of SST in driving variation in these C. maenas characteristics across a latitudinal gradient. There was a significant relationship between SST and CWmax for males and SST and CW of females at maturation, respectively. The results extrapolate for each local projected temperature increase caused by climate change and suggest an effect on the morphometric and reproductive traits of C. maenas across regions. These changes comprise an overall reduction in C. maenas body size, an enlargement of the reproductive season, a shortening in the duration of larval developmental time, and a decrease in the relative size of crabs at maturation. Secondary consequences on the fecundity and connectivity of populations are discussed.
- Retábulos do Barroco Pleno nos Arciprestados de Castelo Branco e SertãPublication . Grilo, António Manuel Pinto Marçal; Lameira, FranciscoA presente dissertação analisa os retábulos do Barroco Pleno (finais do século XVII – primeiras décadas do século XVIII) nos arciprestados de Castelo Branco e da Sertã. Para além de uma breve caracterização socio religiosa desta região nos meados do século XVIII, baseada nas fontes documentais disponíveis, são descritos individualmente cada um dos vinte e três retábulos inventariados. São todos de madeira predominantemente entalhada e dourada e seguem no geral as mesmas características dos exemplares existentes nas outras regiões do país.
- Disentangling microbial community variations across three European Coastal LagoonsPublication . Galys, Helena; Chícharo, Luis; Fazi, StefanoCoastal lagoon ecosystems are vital and dynamic habitats, yet their microbial community structures remain poorly understood. This thesis presents a comprehensive investigation of microbial communities in the three Southern European Coastal Lagoons Butrinti Lagoon (Albania), Sabaudia (Italy), and Ria Formosa (Portugal) aiming to identify key taxa and potential interactions that may offer generalizable insights into lagoon microbial ecology. A multi-faceted approach was employed, combining elemental composition analysis and high-throughput DNA sequencing to characterize both the quantitative and qualitative aspects of microbial communities. The results provide in-depth descriptions of microbial composition and diversity in each lagoon, highlighting unique taxonomic signatures. Subsequently, a correlative analysis suggested the potential of key bacteria (e.g. Flacobacteriaceae and Desulfobulbaceae) as potential indicator species for anthropogenic impacts, such as heavy metal pollution. Further network inference revealed distinct genera (Haliglobus, Woeseia, Actibacter, Sandaracinaceae and an unknown species of Gammaproteobacteria) as shared key taxa across the lagoons. Notably, the findings suggest potential general patterns in microbial community composition within the three European coastal lagoons. However, given the exploratory nature of this study, further research is encouraged to confirm and expand upon these preliminary insights.