Rosalina Gabriel | Azores University (original) (raw)

Papers by Rosalina Gabriel

In the Azores and Madeira Islands, lichens and bryophytes are supplied with mineral nutrients and... more In the Azores and Madeira Islands, lichens and bryophytes are supplied with mineral nutrients and other trace elements from precipitation, throughfall, streamfall, Saharan dust, sea spray and the underlying substrate. In this work, lichens and bryophytes mercury and selenium concentrations are emphasized because it was observed different geographical Hg/Se ratios over the long distances that separate the islands. It was hypothesized that selenium, which is required in trace quantities, also blocks the mercury uptake in lichens and bryophytes once a very threshold concentration is exceeded. In Santa Maria (Azores) and Madeira islands, mercury values averaged 0.2 mg/kg, and specimens from Terceira Island (Azores) averaged 0.3 mg/kg. Local burning of fossil fuels contributes in a very small extent to mercury atmospheric contents of the Azores and Madeira Islands. These Portuguese archipelagos are remote from large anthropogenic sources. Possible major airborne sources of mercury in the islands include long-range transports, marine emissions, volcanic fluxes, crustal degassing and weathering degassing, or combination of these.

International …, Jan 1, 2012

Azorean lava-tubes and volcanic pits adequately sampled for arthropod fauna were evaluated for sp... more Azorean lava-tubes and volcanic pits adequately sampled for arthropod fauna were evaluated for species diversity and rarity. An iterative partial multiple regression analysis was performed to produce a multi-criteria index (Importance Value for Cave Conservation, IV-CC) incorporating arthropod species diversity indices but also including indices qualifying cave geological and management features (e.g., the diversity of geological structures, threats, accessibility). Additionally, we calculated complementarity solutions (irreplaceability and Fraction-of-Spare measures) for each cave with different targets per species, i.e., the minimum number of caves needed for each species to be represented either once or twice. Our results clearly show that to preserve all troglobiont arthropods endemic to the Azores, it is crucial to protect several caves per island. As many as 10 and 15 caves are needed to include one or two occurrences, respectively, per species.

Angra do Heroísmo (Terceira; Islas Azores, Portugal) es una ciudad pequeña, insular y periférica,... more Angra do Heroísmo (Terceira; Islas Azores, Portugal) es una ciudad pequeña, insular y periférica, lo que hace que sea una ciudad más expuesta a los problemas de insostenibilidad urbana. El objetivo principal de este estudio es definir los problemas de Angra do Heroísmo con base a las perspectivas de los ciudadanos en lo que se refiere a sostenibilidad urbana con la finalidad de mejorar la calidad de vida y marcar las directrices adecuadas de progreso y crecimiento. Para desarrollar el trabajo se utilizó la Metodología Q, que consta de cuatro fases: 1º - Concurse; 2º - Q-Sample; 3º - Q-Sort y 4º - ConclusionConclusión. Los indicadores cualitativos que fueron definidos en el Concurse fueron: Urbanismo; Desarrollo; Equipamientos y Seguridad; Economía; Gobierno y Financiación; Migración; Pobreza; Cultura y Educación; Ambiente; y Participación pública. Los stakeholders seleccionados incluían un número equilibrado de Ciudadanos, Comerciantes, Funcionários del Municipio, Académicos y Activ...

Biodiversity Data Journal, 2015

An updated checklist of the Birds of the Azores is presented based on information compiled from R... more An updated checklist of the Birds of the Azores is presented based on information compiled from Rodrigues et al. (2010) and from the websites, Azores Bird Club. (2014), Aves dos Açores (2014) Azores Bird Sightings (2014) and Vittery (2014), since 2010. The checklist has a total of 414 species, including 38 new species. Almost half of the species and subspecies that occur in the Azores have a Palearctic origin, the remaining ones being essentialy Nearctic and Holarctic species. São Miguel is the island with the highest number of bird species, followed by Terceira, Corvo and Flores islands.

Risch, O. L.; R. Gabriel & J. P. Barreiros 2009. Avaliação de duas técnicas de sensibilização amb... more Risch, O. L.; R. Gabriel & J. P. Barreiros 2009. Avaliação de duas técnicas de sensibilização ambiental acerca das piscinas naturais (palestra e visita) em jovens do 3º CEB. VIII Encontro de Inovação Educacional – III Encontro Internacional – “Outra Educação é Possível”. Livro de Resumos on-line em http://encontroinovacao.wordpress.com/comunicacoes/

We investigate the macroecological patterns of the terrestrial biota of the Azorean archipelago, ... more We investigate the macroecological patterns of the terrestrial biota of the Azorean archipelago, namely the species-range size distributions, the distance decay of similarity, and the island species-area relationship (ISAR). We use the most recent up-to-date checklists to describe the diversity at the island level for nine groups (Lichens, Fungi, Diatoms, Bryophytes, Vascular Plants, Nematodes, Molluscs, Arthropods, Vertebrates). The particularities of the Azorean biota result in some differences to the patterns commonly found in other oceanic archipelagos. Strikingly, bryophytes, molluscs and vertebrates show a bimodal species-range size distribution, and vascular plants a right unimodal distribution due the high numbers of widespread species. Such high compositional homogeneity between islands also results in non-significant or even negative decays of similarity with distance among islands for most groups. Dispersal ability, together with other particular characteristics of each taxon, also shapes these distributions, as well as the relationships between island species richness, and area and time. Strikingly, the degree of departure of the richness of the whole archipelago from the SAR of its constituent islands largely depends on the dispersal ability of each group. Comparative studies with other oceanic archipelagos of the globe are however needed to understand the biogeographical and evolutionary processes shaping the remarkably low diversity of the Azorean biota.

FEMS microbiology ecology, Jan 11, 2015

Processes determining diversity and composition of bacterial communities in island volcanic caves... more Processes determining diversity and composition of bacterial communities in island volcanic caves are still poorly understood. Here, we characterized colored microbial mats in 14 volcanic caves from two oceanic islands of the Azores using 16S rRNA gene sequences. Factors determining community diversity (α) and composition (β) were explored, namely colored mats, caves and islands, as well as environmental and chemical characteristics of caves. Additive partitioning of diversity using OTU occurrence showed a greater influence of β-diversity between islands and caves that may relate to differences in rare OTUs (singletons and doubletons) across scales. In contrast, Shannon diversity partitioning revealed the importance of the lowest hierarchical level, (α diversity, colored mat), suggesting a dominance of cosmopolitan OTUs (>1%) in most samples. Cosmopolitan OTUs included members involved in nitrogen cycling, supporting the importance of this process in Azorean caves. Environmental ...

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Non-parametric species richness estimators Standardized surveys Azores Epigean arthropods Canopy ... more Non-parametric species richness estimators Standardized surveys Azores Epigean arthropods Canopy arthropods Bryophytes a

Botanical Journal of the Linnean Society, 2015

We require representative data of species occurrence to explain plant diversity patterns, but mos... more We require representative data of species occurrence to explain plant diversity patterns, but most of the available information is incomplete and biased. To improve our knowledge, we suggest that species inventorying should be an iterative process encompassing the following: (1) the detection of taxonomic and geographical gaps; (2) the planning of a survey design to reduce such gaps; and (3) the evaluation of field sampling results. Here, we focus on the latter phase for the bryophytes of Terceira Island (Azores) for which we have previously estimated < 1% of the area as well surveyed based on historical collections. To examine the performance of our stratified survey based on two factors (land use and environmental regions), we used rarefaction curves, ANOVA tests and bootstrap sampling. We recorded 40% of all the species known for the island and presented eight new citations. The species assemblages remained similar between historical and current inventories. Most localities had completeness values > 85%, but we always exceeded the optimal sampling effort. Land uses and environmental regions affected species diversity, but, unexpectedly, to a different degree. Our study illustrates the difficulties of planning field surveys to obtain reliable biodiversity patterns, even when prior information and standardized sampling protocols are explicitly considered.

2014. Long-term monitoring across elevational gradients to assess ecological hypothesis: a descri... more 2014. Long-term monitoring across elevational gradients to assess ecological hypothesis: a description of standardized sampling methods in oceanic islands and first results. Arquipelago. Life and Marine Sciences 31: 45-67.

& P.A.V. Borges 2014. The Yellow-crowned Night Heron Nyctanassa violacea (Aves: Pelecaniformes: A... more & P.A.V. Borges 2014. The Yellow-crowned Night Heron Nyctanassa violacea (Aves: Pelecaniformes: Ardeidae) in the Azores and Madeira Archipelagos: a new species for the Western Palearctic. Arquipelago. Life and Marine Sciences 31: 37-43.

International …, Jan 1, 2012

Biodiversity Data Journal, 2015

FEMS microbiology ecology, Jan 11, 2015

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Botanical Journal of the Linnean Society, 2015

This presentation highlights 5 years of learning from coastal fishing communities in the Azores i... more This presentation highlights 5 years of learning from coastal fishing communities in the Azores islands Portugal. We used photo elicitation and focus groups to invite people to speak about the sea and all the deep, complex and sometimes contradictory meanings that it may have. The researchers sought environmental justice within the everyday pro-cesses using deep ethnographic and autobiographic-narrative inquiry which lead to participation in learning about as well as supporting collaborations between fishers, scientists and policy makers. This work calls for looking at the sea through new eyes, hearing with new ears, feeling differently and awakening to the possibility of knowing the sea in unfamiliar ways.

Oceanic islands are at the core of research on biogeography and many other biological issues. Rou... more Oceanic islands are at the core of research on biogeography and many other biological issues. Roughly
halfway between Europe and North America, lies the archipelago of the Azores, the most remote
archipelago of the North Atlantic Ocean. Composed of nine islands, divided into eastern, central and
western groups, it is home to approximately 250.000 inhabitants and more than 6000 species (terrestrial
and marine), including about 500 endemics.
Islands have long been recognized as of special scientific interest, especially in respect to their
formation and development mechanisms, means of biotic colonization, evolution of unique biotas and
ecosystems, and extensive loss of endemics, making island research and conservation an attractive and
very active area of research.
The Island Biology 2016 international conference brings together the expertise of a wide spectrum of
research fields, in order to expand knowledge and achieve a unified view of island biology. The
conference includes poster presentations, plenary and regular sessions, and hosts 24 specialized
symposia, aimed to accommodate in-depth discussions in topical areas in Island Biology.
Biodiversity, Global Changes, Conservation, Invasive Species, Evolutionary Biology, Species
Interactions and Networks, Paleobiology and Biogeography are the key conference themes. We expect
that the pioneering ideas, leading theories, novel methodological approaches and recent groundbreaking
results presented at this conference will provide advances in island biology research and
guidelines for the future development of this field.
In addition, the interdisciplinary expertise of participants is expected to contribute to inform decisionmakers
concerning effective conservation planning strategies in island ecosystems, following the
inspiration provided by the Declaration of the Guadeloupe 2014 International Conference on
Biodiversity and Climate Change.
We look forward to welcome you all in the Azores!