Seeds Rain
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Seed Bank from Abandoned Pastures in the Coastal Region of Paraná
ABSTRACT The aim of the present study was to evaluate the seed bank of three contiguous areas: pasture abandoned for ten years, with soil amended by partial beheading for two years at horizon A (area I); pasture identical to the previous example, but with recent mobilization of the topsoil (area II); area in the early stages of regeneration (area III). Fiel
Floresta Ambient.. Publicado em: 30/07/2018
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2. Isolated trees with high crown coverage and densities increase pasture seed rain
ABSTRACT Pasture and crop lands restrict seed dispersal near remnant forest fragments, especially by restricting the movements of dispersal agents and limiting propagule dispersal. Some factors can improve seed dispersal in open areas, such as the presence of high numbers of isolated trees in close proximity to forest fragments. We sought to determine if: (i
Acta Bot. Bras.. Publicado em: 2016-09
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3. Seed rain in areas with and without bamboo dominance within an urban fragment of the Atlantic Forest
Understanding the flow of diaspores is fundamental for determining plant population dynamics in a particular habitat, and a lack of seeds is a limiting factor in forest regeneration, especially in isolated forest fragments. Bamboo dominance affects forest structure and dynamics by suppressing or delaying the recruitment of and colonization by tree species as
Acta Bot. Bras.. Publicado em: 2014-03
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4. Reproductive biology and early establishment of Pinus elliottii var. elliottii in Brazilian sandy coastal plain vegetation: implications for biological invasion
Pinus is the most invasive woody taxon, exceeded only by herbaceous plants. This study reports the reproductive biology and early establishment of Pinus elliottii Engelm. var. elliottii, describing its invasive properties in a protected natural area of the Brazilian coastal sandy plains. We evaluated the seed germination and rain, longevity of seed viability
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-04
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5. Subsídios para o manejo da invasão biológica de uma palmeira em áreas de Mata Atlântica / Subsidies to ecological management of the biological invasion by a palm tree in Atlantic forest areas
The introduction of alien species in natural habitats resulting in processes of biological invasions is one of the indirect human actions which nowadays threaten global biodiversity. Although bioinvasions usually cause huge negative impacts in the native biota, they are still little studied in the megadiverse tropical environments. The Australian palm tree A
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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6. RESOURCE SHARING AND DISTRIBUTION OF RISK IN ANNUAL SPECIES OF TROPICAL ZONE Semiarid / Partilha de recurso e distribuiÃÃo de riscos em espÃcies anuais da zona tropical semiÃrida
Theoretical and empirical inferences about resources sharing and risk spreading based on seed germination and plants phenodynamics are concentrated in studies of annual desert species. These mechanisms should be standard for species that coexist in any environment where the risk of reproductive failure is high, as in Brazilian tropical semiarid. This study
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2011
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7. MECANISMOS DE REGENERAÇÃO NATURAL E ESTRUTURA POPULACIONAL DE TRÊS ESPÉCIES ARBÓREAS EM REMANESCENTE DE FLORESTA OMBRÓFILA MISTA, RIO GRANDE DO SUL / NATURAL REGENERATION MECHANISMS AND POPULATION STRUCTURE OF THREE SPECIES IN MIXED RAIN FOREST REMNANT, RIO GRANDE DO SUL
The ecology of regeneration and population dynamics is necessary information to the conservation and management of forest ecosystems. Thus, this study aimed to characterize: a) the mechanisms of natural regeneration in a Mixed Rain Forest remnant and b) the population structure of Araucaria angustifolia (Bertol.) Kuntze, Blepharocalyx salicifolius (Kunth) O.
Publicado em: 2010
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8. Seed rain in the area of agriculture abandoned near a fragment preserved of caatinga in Pernambuco, Brazil. / Chuva de sementes em área abandonada após cultivo próxima a um fragmento preservado de caatinga em Pernambuco, Brasil
O papel de fragmentos preservados de caatinga na regeneração de um ambiente antropizado foi avaliado em uma área utilizada de agricultura e abandonada há 15 anos. Foram colocados 105 coletores de sementes na área de cultivo abandonado, distribuídos em 5 transectos de 210 m, perpendiculares ao fragmento preservado de caatinga. Coletores foram colocados
Publicado em: 2010
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9. MECHANISMS OF NATURAL REGENERATION IN ESTACIONAL DECIDUAL FOREST, SANTA MARIA, RS / MECANISMOS DE REGENERAÇÃO NATURAL EM FLORESTA ESTACIONAL DECIDUAL, SANTA MARIA, RS
This study evaluated the mechanisms of natural regeneration represented by seeds rain, seeds bank of the soil and the regeneration vegetation, considering the seedlings bank and the established regeneration, in a fragment of Estacional Decidual Forest. The evaluation was made with 70 randomized samplings in 14 parcels inside four bands, with systematic distr
Publicado em: 2009
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10. Ecological wood anatomy and cambial activity of Roupala rhombifolia (Proteaceae) in Serra do Cipó (MG) / Anatomia ecológica do lenho e atividade cambial de Roupala rhombifolia (Proteaceae) na Serra do Cipó (MG)
The intensity of environmental variations is smaller on tropical than temperate regions. Therefore, tropical species were considered for years as evergrowing. In addition, environmental variations can exist in small and big scales and species should respond differently depending on each environmental stimulus. By these reasons, the aim of the study was to an
Publicado em: 2009
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11. Tratamentos fungicidas antecipados à semeadura e sua influência na qualidade de sementes de trigo
The objective of this work was to evaluate the influence of quimical treatments with fungicides, applied in different moments, before sowing time, in the germination and sanity of wheat seeds. Two experiments were carried out, using BRS 220 and CD 111 cultivars, produced and stored in Mauá da Serra, PR. The treatments used in the test, where: Carboxin + Tir
Publicado em: 2008
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12. Fenologia e chuva de sementes em Floresta Estacional Semidecidual no município de Viçosa, Minas Gerais, Brasil. / Phenology and seed rain in Semidecidual Seasonal Forest in Viçosa, Minas Gerais, Brazil
The present study was divided in two chapters. On the first it was aimed to study the phenology of 20 arboreal species and to answer the following questions: (1) Which is the seasonality degree in the production of flowers, fruits, falling and leaf shooting? (2) Are there any flowering and fructification synchrony intra and interespecific? (3) What is the in
Publicado em: 2007