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

Sabina das Laranjas: gênero, raça e nação na trajetória de um símbolo popular, 1889-1930<A NAME="top1"></A>

Este trabalho parte de uma passeata realizada em 1889 por estudantes de medicina em favor de uma quitandeira desalojada de seu posto de venda, passando a discutir as maneiras pelas quais o evento foi tematizado ao longo da Primeira República. Com isto, pretende-se lançar luz sobre os meandros das políticas cotidianas raciais e de gênero no período, bem como a relação deste processo com a negociação da identidade nacional.<br>This paper takes as its starting-point an 1889 march organized by medical students on behalf of a street-vendor displaced from her position. It goes on to explore the ways in which that event was taken up over the course of the First Republic, hoping to shed light on the twists and turns of the period's everyday racial and gender politics, and their relationship to the negotiation of national identity

Euclides da Cunha e a República

A revisão da República é central na obra de Euclides da Cunha, presente em seus artigos de jornal e na maior parte de seus livros. Analisou o regime republicano não só em Os sertões (1902), em que tratou da guerra de Canudos, como em Contrastes e confrontos (1907) e em Á margem da história (1909). Foi testemunha e intérprete dos rumos do novo regime, que ajudara a fundar com artigos de propaganda política no jornal A Província de S. Paulo.<br>The revision of the Republic is a central concern in the works of Euclides da Cunha. It appears in his newspaper articles and in most of his books. He analysed the republican regime not only in Os sertões (Rebellion in the backlands, 1902), in which he deals with the Canudos War, but also in Contrastes e confrontos (1907) and in À margem da história (1909). He both witnessed and interpreted the trends of the new regime which he had helped to set up with his political articles in the newspaper A Província de S. Paulo