GBA - Artigos em Revistas Internacionais / Articles in International Journals
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- Using forest structural complexity and topography metrics to characterise vertical microclimatic stratificationPublication . Lhoumeau, Sébastien; Seidel, Dominik; Elias, Rui B.; Gabriel, Rosalina; Borges, Paulo A. V.ABSTRACT: Understanding how topography and forest structure drive the transformation of incoming solar energy into local microclimatic conditions is essential for predicting forest resilience under climate change. Quantifying the importance of such attributes on the stratification of microclimates requires the integration of heterogeneous ecological data streams. Here, we combined satellite-derived solar radiation and topographic data, LiDARderived forest structural metrics and in situ air temperature and relative humidity time series to quantify the interactions between incoming solar energy, forest structure and topography, ultimately driving microclimatic stratification. Focusing on native and exotic forest stands on Terceira Island, Azores, Portugal, we evaluated how forest structural complexity and topography interact with incoming solar energy to jointly shape daily air temperature and vapour pressure deficit dynamics. By explicitly linking terrain complexity and three-dimensional vegetation structure with external energy inputs and sensor-derived microclimatic responses, our approach provides a datadriven basis for identifying the structural attributes that drive microclimatic variability within forests. Our results show that forest structural complexity and topography shape the vertical gradient of air temperature and atmospheric dryness, but with responses differing among canopy, understory, and ground strata. These findings demonstrate the value of integrating remote sensing, environmental sensor networks, and statistical modelling to resolve biologically relevant microclimatic heterogeneity. More broadly, the workflow developed here offers a transferable framework for microclimate monitoring, forest restoration assessment, and the identification of microrefugia in structurally complex ecosystems.
- Mycorrhizal status and inoculation response of Proteaceae cultivars on Terceira Island (Azores): Implications for sustainable crop establishment.Publication . Dutra, Joel; Melo, Catarina Drumonde; Wu, Qiang-ShenArbuscular mycorrhizal fungi (AMF) can support sustainable crop production, but their role in Proteaceae remains poorly understood because many members of this family are considered non-mycorrhizal. This study assessed the mycorrhizal status, AMF taxon occurrence, and seasonal colonisation patterns in four ornamental Proteaceae cultivars on Terceira Island, Azores. The effects of early inoculation with native AMF on the growth and survival of Protea ‘Grandicolor’ cuttings were evaluated under nursery conditions. AMF colonisation was detected only in Protea ‘Grandicolor’ and Leucospermum ‘Succession II’, with total root colonisation ranging from 26–59% and 29–78%, respectively. Arbuscules were observed in both cultivars, providing morphological evidence consistent with a symbiotic interface. Nine AMF morphotypes belonging to Claroideoglomeraceae, Gigasporaceae, and Glomeraceaewere detected, and Funneliformis mosseae was the most frequently detected taxon. AMF taxon richness was highest in samples from Protea ‘Grandicolor’ and varied seasonally for this cultivar. Native AMF inoculation increased survival of Protea ‘Grandicolor’ from 50% to 90% and significantly enhanced shoot and whole-plant growth, leaf and root production, and fresh and dry biomass. These findings reveal cultivar-related variation in detected AMF colonisation and support further evaluation of locally adapted AMF inoculum for sustainable nursery production of ornamental Proteaceae in agroecosystems.
- New spatial records of vascular plants in the Azores Archipelago: the PRIBES project and the Azorean Biodiversity Portal (ABP) initiatives - II. Pico IslandPublication . Petrone, Andrea; Borges, P.A.V.; Pereira, Fernando; Pires Bento da Silva Elias, Rui MiguelABSTRACT: Although the Azores Archipelago is widely recognised for its remarkable natural heritage, it is increasingly threatened by the rapid spread of invasive species, which are causing significant biodiversity decline and impairing ecosystem functioning and services. These biological invasions — mainly driven by intensified global trade and human mobility — also have consequences for public health, local livelihoods and economic activities. To address these challenges, the PRIBES project ("Estratégia regional para o controlo e prevenção de espécies exóticas invasoras"; LIFE IP AZORES NATURA - LIFE17 IPE/PT/000010) advocates the implementation of an integrated regional strategy for the management of terrestrial and freshwater invasive species. The proposed framework focuses on coordinated governance through a dedicated task force, strengthened preventative actions including biosecurity measures and risk analyses and early detection systems supported by monitoring programmes and citizen-science initiatives. It also promotes a hierarchical management approach, ranging from eradication to long-term control and mitigation, according to feasibility and economic sustainability. This strategy is supported by scientific research aimed at understanding invasion pathways and evaluating management outcomes, as well as collaborations at national and international levels that encourage data exchange and shared expertise. Public engagement is fostered through awareness campaigns and educational activities. In parallel, the Azores Bioportal functions as a key open-access repository for biodiversity information, providing validated species records and connections with international biodiversity networks. Together, these initiatives contribute to monitoring both native and invasive species, while offering valuable resources for conservation planning and evidence-based decision-making. In the scope of the PRIBES Project and the Azores Bioportal, we started a series of data papers with new spatial records of vascular plants gathered during field campaigns across several Azorean Islands between 2019 and 2025. The first focused on São Jorge Island, whereas the second, current data paper focuses on Pico Island.
- Novelty, diversity, and genetic dark matter in enterococci of invertebratesPublication . Sgardioli, Bruna; Phillips, Matthew; Miklos, Arjun; Fleiszig-Evans, Kailey; Manson, Abigail; Mello, Suelen; Shea, Terrance; Urhan, Aysun; Whipple, Ryan; Salamzade, Rauf; Sanders, Jasper; Borges, P.A.V.; Dapkevicius, Maria de Lurdes; Earl, Ashlee; Gilmore, MichaelABSTRACT: Enterococci appear to have originated in the guts of early terrestrializing arthropods and invertebrates over 425 million years ago—hosts that are now highly diverse and widespread in nature today. Yet most knowledge of the genus comes from human infection-associated lineages with genomes swollen by the recent accretion of foreign DNA conveyed by mobile elements. Because invertebrates dominate terrestrial animal diversity and biomass, they would be predicted to constitute a major but little-explored reservoir of enterococcal diversity. We therefore systematically examined Enterococcus association and species diversification in invertebrate hosts of the comparatively natural, isolated, but well-characterized environment of the Azorean island of Terceira. Over 100 invertebrate specimens were examined for associated enterococci, which were taxonomically classified by whole-genome sequencing. Supporting the existence of a large pool of uncharacterized enterococci and Enterococcus-adapted genes, 40% (eight of 20) of the Enterococcus species identified were either undescribed, including four candidate new species described here, or very recently discovered. In contrast, control isolates from vertebrates were exclusively of known species typical of sampling elsewhere, discounting geographic isolation as a main driver of the novelty observed. Further, because of the abundance of E. casseliflavus and E. flavescens in this collection, we obtained the resolution necessary to quantify the divergence and decipher the drivers of speciation in the controversial division between these naturally vancomycin-resistant species. These findings provide robust support for the existence of a large pool of new species and unexplored adaptive traits in invertebrate-associated enterococci—diverse environmental survival traits optimized for expression in an enterococcal background, and well positioned for transmission into human-associated enterococcal strains.
- Taxonomic reassessment of Tolpis (Asteraceae) in the Azores and Madeira archipelagos with description of new speciesPublication . Borges Silva, Lurdes da Conceição; Dias da Silva, Luís Filipe; Sequeira, Miguel; Crwford, Daniel; Mort, Mark; Pires Bento da Silva Elias, Rui Miguel; Roxo, Guilherme; Moura, Monica; Schmidt-Lebuhn, AlexanderABSTRACT: Tolpis (Asteraceae) is a recently diversified genus of flowering plants, centered in the Macaronesian region, where it exhibits striking morphological variation and high levels of endemism. In this study, we focus on the archipelagos of Madeira and the Azores (Portugal). The Azores are divided into three biogeographically distinct island groups—western, central, and eastern sub-archipelagos—which provide a natural framework for studying insular diversification. The number and identity of endemic Tolpis taxa in these islands remain poorly understood. To address this, we integrated recent molecular evidence with a comprehensive morphometric dataset, including 349 specimens from 137 locations across both archipelagos. Based on 61 quantitative and qualitative morphological characters, we re-circumscribe previously described taxa and formally describe seven new endemic species from the Azores. Consistent morphological differences support the recognition of Tolpis succulenta as endemic to Madeira. Within the Azores, both T. succulenta and T. azorica in their current circumscription display island-level morphological variation, leading to the recognition of seven newly described endemic taxa.
- Stability in the face of global decline: a 20-year study of arthropods in an oceanic archipelagoPublication . Pozsgai, Gabor; Cardoso, Pedro; Fattorini, Simone; Rigal, François; Coelho dos Santos, Ana Margarida; Whittaker, Robert; Amorim do Rosário, Isabel; Canelas Boieiro, Mário Rui; Borda-de-Água, Luís; Costa, Ricardo; Crespo, Luís Carlos; Henriques Alves Ferreira, Maria Teresa; Leite, Abrão; Lhoumeau, Sébastien Georges André; Malumbres-Olarte, Jagoba; Matthews, Thomas; Drumonde Melo, Catarina Alexandra; Oyarzabal da Silva, Guilherme; Pereira, Fernando; Quartau, José; Rego, Carla; Ribeiro, Sérvio; Ros Prieto, Alejandra; Serrano, Artur; Triantis, Kostas; Gabriel, Rosalina; Borges, P.A.V.ABSTRACT: Insect declines are of global concern, yet no long-term ecological studies (LTER) have confirmed this trend on islands. This study utilises the first available LTER data on island arthropods, targeting epigeal and canopy species from the Azores Archipelago (Portugal), and covering over 20 years in three distinct sampling events from 30 standard sites. We investigate changes in abundance, biomass, and species richness within native forest arthropod communities, focusing on the proportions of endemic and introduced species, and temporal patterns among single-island endemics and forest-dependent endemics. Results reveal significant temporal variability, but overall abundance, biomass, and species richness remain stable across endemic and native non-endemic taxa. Among the species studied, 28% declined, 17% increased, and 55% showed no significant differences. Exotic invasions and related extinctions appear minimal. Forest-dependent endemic species declined below anticipated levels, suggesting that the extinction debt for these species may be less severe than initially expected. Nonetheless, some forest specialists have declined significantly, and seven species, not seen over 20 years, are considered to be extinct. The three-decade-long conservation of Azorean native forests may have contributed to the stability of some populations, thus these findings underscore the need for continued and enhanced conservation efforts of insular forest-associated diversity.
- Mineral composition of Azorean bananas (Musa acuminata) across volcanic soils and implications for micronutrient intakePublication . Linhares, Diana; Vasconcelos, Tânia; Camarinho, Ricardo; Garcia, Patrícia; dos Santos Rodrigues, ArmindoABSTRACT: The Azores archipelago has young, nutrient-rich volcanic soils that support mineral accumulation in crops. This study assessed the elemental composition of unripe Azorean bananas (Musa acuminata Colla) cultivated across six volcanic complexes on São Miguel Island (Sete Cidades, Picos, Fogo, Furnas, Povoação, and Nordeste) and evaluated their potential contribution to mitigating micronutrient deficiencies. Banana samples were collected from representative orchards, morphologically characterized, oven-dried, homogenized, and analyzed for K, Mg, Co, Cu, Fe, Mn, Se, and Zn using inductively coupled plasma mass spectrometry (ICP-MS). Mineral concentrations varied significantly among volcanic complexes. Nordeste bananas showed the highest concentrations of Mg, K, and Zn; Furnas had elevated Mn and Co; Fogo and Nordeste had the highest Fe; and Sete Cidades had the lowest concentrations overall. Compared with bananas from other regions, Azorean bananas were particularly rich in K, Mn, and Zn, while Mg concentrations were comparable. A 100 g portion can meaningfully contribute to daily Mg and K intake, although Mn intake in infants may require moderation. This study provides region-specific data that strengthens food composition databases and supports more accurate dietary exposure assessments, underscoring the importance of site-specific research for public health and sustainable agriculture.
- Assessing traffic-derived soil contamination: Insights from earthworm bioaccumulation and histomorphological responsesPublication . Coelho, Nádia; Camarinho, Ricardo; Garcia, Patrícia; dos Santos Rodrigues, ArmindoABSTRACT: This study aims to evaluate traffic-derived soil contamination using Amynthas gracilis (Kinberg, 1867) earthworms as bioindicators, with insights from bioaccumulation and histomorphological responses. Road pollution arises from multiple sources, including vehicle emissions, tire and brake wear, and stormwater runoff, with extensive environmental impacts. The negative impacts of heavy traffic pollution are well-recognized, but less information is available on that of moderate traffic road pollution. Besides serving as proxies for soil contamination, earthworms provide information on contaminant bioavailability and biological responses. Soil and A. gracilis earthworm samples were collected on either side of three roads in São Miguel Island, Azores, Portugal, with varying average annual daily traffic: Lagoa–Ponta Delgada (44.300 annual daily traffic), Lagoa–Ribeira Grande (9092 annual daily traffic), and Coroa da Mata–Santa Iria (<400 annual daily traffic), labelled MHT, MT, and LT sites. Soil and earthworm elemental concentrations were measured; soil elemental contamination and earthworm bioaccumulation factors were calculated. Earthworm histomorphometrical and histomorphological data were gathered to assess the impact of chronic exposure to moderate traffic road pollution on bioindicator tissues. Enrichment factors were elevated for Bi in MHT and MT sites, and Co in MT site; earthworms bioaccumulated As, Cd, Hg, Sb, Zn. Histological analyses revealed alterations in earthworm tissues indicative of physiological stress, namely thicker integument and peritrophic matrix (both of which reflect enhanced barrier function), thinner intestinal epithelium (reflecting impaired nutrient absorption and higher cellular turnover), and a higher proportion of mucous cells (reflecting enhanced barrier function) in the integument of earthworms from MHT and MT sites. The impact of moderate levels of traffic pollution is demonstrated by its contribution to soil contamination. The potential of using A. gracilis earthworms as sensitive bioindicators to moderate levels of road pollution is highlighted.
- Road proximity and an invasive ant mediate the occurrence patterns of native ant speciesPublication . da Silva Pinto, Tomás; Canelas Boieiro, Mário Rui; Chozas, Sergio; Serrano, Helena; Ascensão, FernandoABSTRACT: Road networks are expanding globally, altering ecosystems and facilitating the spread of invasive species. We investigated how road proximity and the invasive Argentine ant (Linepithema humile) influence native ant occurrence in a Mediterranean oak forest (Montado) ecosystem, a High Nature Value farmland. Ants were sampled by pitfall trapping across three distances from roads (0, 50, and 100 m) alongside the collection of local environmental measurements. We collected 3,287 ants (32 species), with L. humile exhibiting an incidence of 68.6%. A two-step analytical framework evaluated these species patterns. First, using univariate models, we found that the managed roadside verge (0 m) significantly altered local abiotic conditions, causing a localized spike in soil pH, an increase in understory vegetation height and plant richness, and a severe deficit in topsoil leaf litter accumulation compared to the interior forest (50 and 100 m distance from road). Second, species-specific piecewise structural equation models (pSEMs) demonstrated that these road-mediated micro-habitat modifications and the presence of L. humile may act as simultaneous, overlapping filters structuring some native ant species occurrence. The invader operated as a biotic filter, influencing the occurrence patterns of five of the eight analysed native focal species (Aphaenogaster gibbosa, Crematogaster scutellaris, Plagiolepis schmitzii, Tapinoma nigerrimum, and Tetramorium semilaeve). Our findings show that roads not only modify habitat conditions but may also mediate the impact of invasive species on native biodiversity.
- Daphnis nerii (Linnaeus, 1758): registo de um esfingídeo raro em PortugalPublication . Paixão Conde, José Manuel; Figueiredo, Hugo; Rodrigues, António; Canelas Boieiro, Mário RuiUm exemplar de Daphnis nerii (Linnaeus, 1758) foi observado em Seia (Serra da Estrela), a 26 de setembro de 2014, provavelmente atraído por luz artificial. Este corresponde ao primeiro registo confirmado da espécie para Portugal.