Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

O nascimento da América portuguesa no contexto imperial lusitano: considerações teóricas a partir das diferenças entre a historiografia recente e o ensino de História The birth of Portuguese America in the context of imperial lusitania: theoretical considerations regarding differences between recent historiography and History teaching

O artigo estrutura-se sobre a comparação entre o que é trazido pela produção historiográfica recente e o que os livros didáticos e o ensino de História do Brasil oferecem acerca do início de nosso período colonial. Os temas aqui tratados são a formação da monarquia e do Estado em Portugal, os antecedentes e as causas da expansão marítima, o significado da viagem de Cabral e, por fim, a dinâmica imperial lusitana até a metade do século XVI. Os fenômenos e processos históricos discutidos servem como indício de uma concepção histórica que está como pano de fundo na maneira de tratar a história do Brasil e de estruturar os livros didáticos.<br>This article deals with the comparison between what is discussed by recent historiographical production and what History textbooks offer concerning Brazil's Colonial Period. The themes include the formation of the Monarchy and the State in Portugal, the antecedents and causes of overseas expansion, the significance of Cabral's travels and, lastly, the Portuguese Imperial dynamics up to the mid-16th century. The historical phenomena and processes brought up here can be considered as pointing toward a historical conception which works as a backdrop to the way in which the history of Brazil is dealt with and how textbooks are organized