104 documents found, page 1 of 11

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 underst...

Fires in Amazonian Blackwater Floodplain Forests: Causes, Human Dimension, and ...

Made available in DSpace on 2022-04-28T19:48:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-12-14; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fundação de Amparo à Pesquisa do Estado do Amazonas; The Amazon basin is being increasingly affected by anthropogenic fires, however, most studies focus on the impac...

Different scales determine the occurrence of aquatic macrophyte species in a tr...

Made available in DSpace on 2022-05-01T08:45:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Distributions of aquatic macrophyte species are commonly associated with water chemistry characteristics. However, other environmental factors that can lead to the occurrence of aquatic plants in lotic ecosystems, such as dynamic habitats linked to the surrounding landscape, have been underestimated. Th...

The shadow of the Balbina dam: A synthesis of over 35 years of downstream impac...

The shadow of the Balbina dam: A synthesis of over 35 years of downstream impac...

Made available in DSpace on 2021-06-25T10:22:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-05-01; Fundação de Amparo à Pesquisa do Estado do Amazonas; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); The Balbina hydropower dam in the Central Amazon basin, established in the Uatumã River in the 1980s, is emblema...

Biased-corrected richness estimates for the Amazonian tree flora

Made available in DSpace on 2020-12-12T01:28:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Amazonian forests are extraordinarily diverse, but the estimated species richness is very much debated. Here, we apply an ensemble of parametric estimators and a novel technique that includes conspecific spatial aggregation to an exten...

Rarity of monodominance in hyperdiverse Amazonian forests

Made available in DSpace on 2020-12-12T01:40:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-12-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such “monodominant” forests are known from all of the main tropical regions. For Amazonia, we sam...

The Amazon Tall Tower Observatory (ATTO): Overview of pilot measurements on eco...

The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed significantly by human activities, and more pervasive change is expected to occur in the coming decades. It is therefore essential to establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, and atmospheric cond...

Influência do pulso de inundação na fenologia foliar e conteúdo de clorofila em...

Com o objetivo de verificar a influência da dinâmica do pulso de inundação na fenologia foliar e conteúdo de clorofilas a, b e total, 15 indivíduos adultos de duas espécies típicas das cotas mais baixas da floresta de igapó, Eschweilera tenuifolia e Hevea spruceana, foram estudados no baixo curso do rio Tarumã-Mirim, Amazonas, Brasil. A fenologia foliar foi acompanhada em observações semanais de campo de julho ...

Ciclo de vida e ecologia de Paspalum fasciculatum Willd. ex. Fluegge (Poaceae),...

Paspalum fasciculatum é uma robusta gramínea C4, perene, de ocorrência nas várzeas da Amazônia Central. Para estabelecer a ecologia e o ciclo de vida da espécie em relação as flutuações anuais do nível do rio, vinte plantas foram marcadas ao acaso e acompanhadas mensalmente, de setembro/95 a agosto /96, em duas áreas entre 23 e 27 m (s.n.m.). Registrou-se o comprimento do talo, o número de folhas verdes e morta...