Grasslands Vegetation
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Maintenance of wetland plant communities: the role of the seed bank in regeneration of native plants
ABSTRACT Exotic grasses have been introduced into wetlands and can compete with native plants due to their high tolerance of flood and dry periods. Flooding can facilitate seed dispersal of exotic species and reduce the diversity of native species. We compared two grasslands to assess whether seed banks can maintain the diversity of native plants in wetlands
Acta Bot. Bras.. Publicado em: 2021-03
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2. Soil seed bank in a subtropical grassland under different grazing intensities
ABSTRACT Grazing is an important determinant for the composition and structure of grasslands; however, soil seed bank (SSB) response to grazing intensity is poorly investigated. We analyzed SSB richness and density in a subtropical grassland in southern Brazil with different forage offers (low, intermediate, high and very high), that is, contrasting grazing
Acta Bot. Bras.. Publicado em: 2020-06
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3. Conservation of species-rich subtropical grasslands: traditional management vs. legal conservation requirements in primary and secondary grasslands
ABSTRACT Land-use change is the main cause of biodiversity losses, and for grasslands includes changes in management. The last 10 years has seen afforestation of traditionally grazed grasslands increase considerably in the understudied Serra do Sudeste region of the Brazilian Pampa, turning the region into a mosaic of tree plantations, natural ecosystems (pa
Acta Bot. Bras.. Publicado em: 2020-06
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4. Heterogeneity of fern communities in riparian forest remnants from the South Brazilian Campos (Pampa)
Resumo As florestas ripárias apresentam fatores bióticos e abióticos que influenciam a dissimilaridade ambiental, e que refletem a distribuição específica de samambaias. O objetivo deste trabalho foi avaliar a heterogeneidade ambiental associada às comunidades de samambaias terrícolas em remanescentes de mata ciliar dos campos da metade sul do estado
Braz. J. Biol.. Publicado em: 02/12/2019
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5. Angiosperms of dry grasslands and savannahs of Jalapão, the largest conserved Cerrado area in Brazil
Resumo Esse estudo fornece uma listagem das espécies de angiospermas que ocorrem na região do Jalapão, Tocantins, Brasil, inserida no domínio do Cerrado, um dos hotspots globais de diversidade. A região do Jalapão é ainda altamente conservada, apesar dos vários tipos de ameaça à sua biodiversidade; sua flora, contudo, ainda é pouco conhecida. Para
Rodriguésia. Publicado em: 11/11/2019
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6. Flora and Vegetation in Different Physiognomies of a Mussununga in Southeastern Brazil
ABSTRACT Mussununga is an understudied ecosystem within the Atlantic Forest domain, in sandy spodosol lowlands from Bahia to Espírito Santo. Its physiognomy varies from grassland to forest, with a transitional savannic area. We evaluated the life-form spectra differences between the grassland and savanna Mussunungas and its relationship with the depth of a
Floresta Ambient.. Publicado em: 12/09/2019
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7. Mapping the fern Blechnum heringeri (Blechnaceae, Polypodiopsida): recording the geographical distribution, ecological preferences and reporting a new record in northeastern Brazil
RESUMO Blechnum heringeri Brade é uma espécie endêmica do Brasil anteriormente considerada vulnerável. Até pouco tempo atrás, o número de registros dessa espécie era muito limitado e restrito ao Domínio Fitogeográfico do Cerrado, no Brasil central. Coletas recentes registraram a espécie nos campos rupestres sobre cangas, no Domínio da Amazônia.
Hoehnea. Publicado em: 26/08/2019
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8. Restoration of abandoned subtropical highland grasslands in Brazil: mowing produces fast effects, but hay transfer does not
ABSTRACT Subtropical Campos Sulinos grasslands, in South Brazil, are among the most biodiverse grasslands of the world. As climatic conditions lead to high productivity, disturbance are critical to maintain their diversity. Long-term exclusion, on the other hand, leads to plant species losses and changes in composition. No studies on the restoration of these
Acta Bot. Bras.. Publicado em: 19/06/2019
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9. Restoration of abandoned subtropical highland grasslands in Brazil: mowing produces fast effects, but hay transfer does not
ABSTRACT Subtropical Campos Sulinos grasslands, in South Brazil, are among the most biodiverse grasslands of the world. As climatic conditions lead to high productivity, disturbance are critical to maintain their diversity. Long-term exclusion, on the other hand, leads to plant species losses and changes in composition. No studies on the restoration of these
Acta Bot. Bras.. Publicado em: 19/06/2019
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10. Synopsis of Cyperaceae in the grasslands of Guartelá State Park, Paraná, Brazil
Resumo Cyperaceae é a terceira maior família dentre as monocotiledôneas, com grande representatividade em ambientes campestres. O presente estudo teve como objetivo realizar o levantamento florístico de Cyperaceae nas formações campestres do Parque Estadual do Guartelá (PEG) e elaborar chaves de identificação para as espécies, sendo o primeiro para
Rodriguésia. Publicado em: 18/03/2019
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11. Influence of vegetation physiognomy, elevation and fire frequency on medium and large mammals in two protected areas of the Espinhaço Range
ABSTRACT The objectives of this study were to determine the richness of medium and large mammal species in two protected areas of the Espinhaço Mountain Range, state of Minas Gerais, Brazil; and to investigate the factors affecting the occurrence of those species. To accomplish that we placed 49 camera traps activated by heat and motion at Rio Preto State P
Zoologia (Curitiba). Publicado em: 08/05/2017
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12. Temporal profiles of vegetation indices for characterizing grazing intensity on natural grasslands in Pampa biome
ABSTRACT The Pampa biome is an important ecosystem in Brazil that is highly relevant to livestock production. The objective of this study was to analyze the potential use of vegetation indices to discriminate grazing intensities on natural grasslands in the Pampa biome. Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation In
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-08