Rubim M. Almeida

Prof. Dr. Rubim M. Almeida

University of Porto, Porto, Portugal
orcid

Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2013
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Book Chapter
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PSPedro F. B. Silva
Pedro F. B. Silva
André MarcalAndré Marcal
André Marcal
RARubim M. Almeida
Rubim M. Almeida

1 October 2015 in Tourism Management Perspectives
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Journal Article
Closed access
FSFrederico Santarém
Frederico Santarém
RARubim M. Almeida
Rubim M. Almeida
PSPaulo Santos
Paulo Santos

Verified
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Carlos Martins Vila-ViçosaCarlos Martins Vila-Viçosa
Carlos Martins Vila-Viçosa
Salvador Arenas-CastroSalvador Arenas-Castro
Salvador Arenas-Castro
Bruno MarcosBruno Marcos
Bruno Marcos
JHJoão Honrado
João Honrado
CGCristina García
Cristina García
JGJoão Gonçalves
João Gonçalves
The Iberian Peninsula hosts a high diversity of oak species, being a hot-spot for the conservation of European White Oaks (Quercus) due to their environmental heterogeneity and its critical role as a phylogeographic refugium. Identifying and ranking the drivers that shape the distribution of White Oaks in Iberia requires that environmental variables operating at distinct scales are considered. These include climate, but also ecosystem functioning attributes (EFAs) related to energy–matter exchanges that characterize land cover types under various environmental settings, at finer scales. Here, we used satellite-based EFAs and climate variables in species distribution models (SDMs) to assess how variables related to ecosystem functioning improve our understanding of current distributions and the identification of suitable areas for White Oak species in Iberia. We developed consensus ensemble SDMs targeting a set of thirteen oaks, including both narrow endemic and widespread taxa. Models combining EFAs and climate variables obtained a higher performance and predictive ability (true-skill statistic (TSS): 0.88, sensitivity: 99.6, specificity: 96.3), in comparison to the climate-only models (TSS: 0.86, sens.: 96.1, spec.: 90.3) and EFA-only models (TSS: 0.73, sens.: 91.2, spec.: 82.1). Overall, narrow endemic species obtained higher predictive performance using combined models (TSS: 0.96, sens.: 99.6, spec.: 96.3) in comparison to widespread oaks (TSS: 0.80, sens.: 92.6, spec.: 87.7). The Iberian White Oaks show a high dependence on precipitation and the inter-quartile range of Normalized Difference Water Index (NDWI) (i.e., seasonal water availability) which appears to be the most important EFA variable. Spatial projections of climate–EFA combined models contribute to identify the major diversity hotspots for White Oaks in Iberia, holding higher values of cumulative habitat suitability and species richness. We discuss the implications of these findings for guiding the long-term conservation of Iberian White Oaks and provide spatially explicit geospatial information about each oak species (or set of species) relevant for developing biogeographic conservation frameworks.

18 November 2022 in Molecules
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Journal Article
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SSSara Silva
Sara Silva
AOAna Isabel Oliveira
Ana Isabel Oliveira
ACAgostinho Cruz
Agostinho Cruz
RORita Ferraz Oliveira
Rita Ferraz Oliveira
RARubim M. Almeida
Rubim M. Almeida
CPCláudia Pinho
Cláudia Pinho
There is an increase in the popularity of craft beer, which is produced by small, independent, and traditional breweries. Since craft beer popularity is rising in Portugal this research focused on assessing physicochemical parameters, total phenolic content (TPC) and the antioxidant capacity of Portuguese craft beers and raw materials used in beer production. In this experimental study, 19 beer samples were analyzed. Parameters such as pH, Total Acidity, Reducing Sugar Content and TPC were evaluated. For the determination of antioxidant activity, DPPH scavenging activity and metal chelating activity (MCA) were analyzed in all samples. Craft beers demonstrated a high phenolic content (ranging from 343.78 mg GAE/L to 2172.49 mg GAE/L), significantly different from industrial beers. Craft beers demonstrated a higher inhibition of DPPH radicals and higher MCA than the raw materials. DPPH inhibition ranged from 36.5% to 96.0% for malt and 64.7% to 79.6% in hops samples. MCA also varied between the different samples, with results of 12.0% to 24.8% in malt samples and 3.8% to 23.5% in hops. Raw materials can potentially influence the antioxidant activity of the resulting beer. Positive correlations between TPC and physicochemical properties can be useful to help consumers choose beers with added value for health.

1 November 2013 in Journal of Archaeological Science
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Journal Article
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JTJoão Pedro Tereso
João Pedro Tereso
PRPablo Ramil-Rego
Pablo Ramil-Rego
YGYolanda Álvarez González
Yolanda Álvarez González
LGLuis López González
Luis López González
RARubim M. Almeida
Rubim M. Almeida

1 December 2016 in Journal of Archaeological Science: Reports
Verified
Journal Article
Closed access
JTJoão Pedro Tereso
João Pedro Tereso
ABAna M. S. Bettencourt
Ana M. S. Bettencourt
PRPablo Ramil-Rego
Pablo Ramil-Rego
ATAndrés Teira-Brión
Andrés Teira-Brión
ILInés López-Dóriga
Inés López-Dóriga
RARubim M. Almeida
Rubim M. Almeida