9 research outputs found

    Pervasive gaps in Amazonian ecological research

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    Biodiversity loss is one of the main challenges of our time, and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space. While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes, vast areas of the tropics remain understudied. In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity, but it remains among the least known forests in America and is often underrepresented in biodiversity databases. To worsen this situation, human-induced modifications 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, 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

    Utilization of microsatellite markers to form families of "pejerrey" Odontesthes bonariensis in a genetic breeding program

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    Foram identificadas a divergĂȘncia e a variabilidade genĂ©tica, por meio do polimorfismo de seis marcadores microssatĂ©lites, de duas populaçÔes de Odontesthes bonariensis, utilizadas em manejos de cultivo e com potencial para fornecimento de reprodutores para programas de melhoramento genĂ©tico. Do total de seis loci, cinco demonstraram eficiĂȘncia para anĂĄlise genĂ©tica nas duas populaçÔes de O. bonariensis. A diferenciação genĂ©tica significante nas populaçÔes analisadas pode fornecer a base para futuros programas de melhoramentos genĂ©ticos, atravĂ©s da combinação de material das populaçÔes divergentes para o desenvolvimento de linhagens ou execução de um programa de seleção

    Plantas visitadas por abelhas africanizadas em duas localidades do estado de SĂŁo Paulo Plants visited by africanized honey bees in two localites of the state of SĂŁo Paulo

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    O conhecimento das plantas de uma regiĂŁo, sua Ă©poca de florescimento e as caracterĂ­sticas do pĂłlen, auxiliam na determinação das espĂ©cies vegetais que contribuem para a composição do mel. Durante o perĂ­odo de 1994 a 1997 foram inventariadas, semanalmente, em diferentes horĂĄrios e num raio de aproximadamente 300m dos apiĂĄrios da USP/ESALQ, em Piracicaba,SP (22°43'S, 47°27'W e 580 m) e do Instituto de Zootecnia, em Pindamonhangaba, SP (22°57'S, 45°27'W e 560 m), as plantas que estavam sendo visitadas por abelhas. Foram anotados o mĂȘs e o perĂ­odo de florescimento das plantas inventariadas. Em Piracicaba foram identificadas 94 espĂ©cies de plantas pertencentes a 41 famĂ­lias (maior nĂșmero de espĂ©cies nas famĂ­lias Asteraceae e Myrtaceae) e em Pindamonhangaba, 76 espĂ©cies, pertencentes a 26 famĂ­lias (maior nĂșmero de espĂ©cies nas famĂ­lias Asteraceae e Verbenaceae). Os resultados indicam que 21 famĂ­lias, 22 gĂȘneros e 15 espĂ©cies de plantas visitadas pelas abelhas africanizadas foram comuns em ambas as localidades.<br>The knowledge of plants from a given region, as well as the blooming period and the pollen characteristics, help for the determination of the plant species which contribute for the honey composition. Plants visited by honey bees were listed during the period 1994 to 1997. The survey was carried out weekly, at different times and within a 300 m radius at two sites: the apiaries of USP/ESALQ in Piracicaba, SP (22°43'S, 47°27'W e 580 m) and of the 'Instituto de Zootecnia', in Pindamonhangaba, SP (22°57'S, 45°27'W e 560 m), both in Brazil. The month and the blooming period were recorded. A total of 94 plants species, from 41 families was identified in Piracicaba (the largest number of species in Asteraceae and Myrtaceae) and 76 plant species of 26 families, in Pindamonhangaba (the largest number of Asteraceae and Verbenaceae). The results indicated that 21 families, 22 genera and 15 species were common for both localities
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