Raposeiro et al. (1) conclude that human occupation of the Azores islands began between 700 and 850 CE, causing widespread landscape disturbance and raising doubts about the islands’ presumed pristine nature when the Portuguese arrived. However, previous paleoecological studies from Flores, Pico, and São Miguel Islands (Table 1) show that permanent changes in the vegetation occurred only after the early 15th century. The authors’ work also shows the permanent decline, to the lowest levels, in arboreal pollen on Corvo and Flores occurring during Portuguese occupation, not before. So, how would cereal cultivation, livestock grazing, and settlements be possible without deforestation—the hallmark of Norse settlements elsewhere (2)? View this table: Table 1. Evidence of major permanent vegetation changes around sites located on Flores, … [↵][1]1To whom correspondence may be addressed. Email: rui.mp.elias{at}uac.pt. [1]: #xref-corresp-1-1
The flora of a region is important in aesthetic, environmental and economic terms. Academic degree holders are fundamental for the sustainable development of a geographically isolated region such as the Azores, the University of Azores (UAc) contributing to that goal. We assessed the perception of the UAc students about the origin and the importance of the Azorean flora for conservation, culture and economy, by applying a questionnaire to 309 students in different scientific areas, addressing origin, symbolic importance, economic importance, and environmental functions. Students showed some knowledge about the concepts of endemic, native, introduced and invasive species, but often failed to connect those to specific plant taxa. Most species cited as symbolic were animals, and the plants mentioned were mainly exotic/invasive. Respondents had a sense of the most important crops and forest species, and attributed several functions related to biodiversity and environmental conservation to the flora. Despite the many actions already implemented, more initiatives are required to increase the connection between Azoreans and Azorean flora.
The Western Mediterranean Region and Macaronesian Islands are one of the top biodiversity hotspots of Europe, containing a significant native genetic diversity of global value among the Crop Wild Relatives (CWR). Sugar beet is the primary crop of the genus Beta (subfamily Betoideae, Amaranthaceae) and despite the great economic importance of this genus, and of the close relative Patellifolia species, a reconstruction of their evolutionary history is still lacking. We analyzed nrDNA (ITS) and cpDNA gene (matK, trnH-psbA, trnL intron, rbcL) sequences to: (i) investigate the phylogenetic relationships within the Betoideae subfamily, and (ii) elucidate the historical biogeography of wild beet species in the Western Mediterranean Region, including the Macaronesian Islands. The results support the Betoideae as a monophyletic group (excluding the Acroglochin genus) and provide a detailed inference of relationships within this subfamily, revealing: (i) a deep genetic differentiation between Beta and Patellifolia species, which may have occurred in Late Oligocene; and (ii) the occurrence of a West-East genetic divergence within Beta, indicating that the Mediterranean species probably differentiated by the end of the Miocene. This was interpreted as a signature of species radiation induced by dramatic habitat changes during the Messinian Salinity Crisis (MSC, 5.96-5.33 Mya). Moreover, colonization events during the Pleistocene also played a role in shaping the current diversity patterns among and within the Macaronesian Islands. The origin and number of these events could not be revealed due to insufficient phylogenetic resolution, suggesting that the diversification was quite recent in these archipelagos, and unravelling potential complex biogeographic patterns with hybridization and gene flow playing an important role. Finally, three evolutionary lineages were identified corresponding to major gene pools of sugar beet wild relatives, which provide useful information for establishing in situ and ex situ conservation priorities in the hotspot area of the Macaronesian Islands.
A new species of Aichryson, A. santamariensis, is described. The species is endemic to the island of Santa Maria in the Azores. Analysis of molecular (ITS and trnL-F) and morphological data support the segregation of this new species from A. villosum with which it was formerly considered conspecific. Aichryson santamariensis differs from A. villosum by characters including indumentum, leaf shape, seed shape and its generally smaller size.
Resumo - Introdução: A mamografia digital tem se mostrado superior à técnica tradicional na detecção precoce do câncer de mama, oferecendo imagens de melhor qualidade com menor radiação e permitindo diagnósticos mais precisos, o que é crucial para reduzir a mortalidade e melhorar o tratamento. Objetivo: Analisar os recentes avanços da mamografia digital no rastreamento e diagnóstico do câncer de mama, avaliando benefícios, implicações clínicas, desafios e perspectivas futuras. Métodos: Trata-se de uma revisão bibliográfica, construída por meio de artigos publicados entre 2020 e 2024, em língua portuguesa, provenientes das bases de dados PubMed, BVS, SciELO e Google Acadêmico. Resultados: O rastreamento do câncer de mama visa identificar tumores pequenos e assintomáticos para reduzir a mortalidade, com a mamografia sendo a técnica comprovadamente eficaz, e tecnologias avançadas como a digital e a tomossíntese melhorando a detecção precoce e a qualidade das imagens. Discussão: O rastreamento do câncer de mama é crucial para reduzir a mortalidade ao identificar precocemente tumores assintomáticos, com a mamografia digital e a tomossíntese melhorando a detecção, embora desafios como acesso desigual persistam. Conclusão: Logo, a mamografia digital é essencial para melhorar a detecção precoce e reduzir a mortalidade do câncer de mama, mas é crucial equilibrar custos e garantir acesso equitativo.