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| Penhalber,Elizabeth de F.; Vani,Waldir Manto. |
| (Floração e chuva de sementes em mata secundária em São Paulo, SP). O florescimento e a chuva de sementes foram estudados em trecho de mata secundária em São Paulo, SP, através da coleta de material reprodutivo depositado em peneiras de 0,5 x 0,5 m, recolhido mensalmente entre janeiro e dezembro de 1993. Foram identificadas 90 espécies pertencentes a 37 famílias. Observaram-se padrões sazonais de floração e de frutificação, sendo que a maioria das espécies floresceu a partir de setembro, com picos de floração e de frutificação em novembro. O padrão de floração encontrado foi o mesmo verificado em outras florestas da região, sendo o de frutificação mais sazonal. Na chuva de sementes, as espécies anemocóricas dispersaram propágulos predominantemente em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flowering; Seed rain; Secondary forest; São Paulo; Brazil. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000200011 |
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| Vergne,Driélli Carvalho; Almeida,Hisaias Souza; Campos,Caroline Cambraia Furtado; Martins,Natália. S.; Ramos,Flavio Nunes. |
| 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) the structural characteristics and (ii) densities of isolated trees in pasture lands, and (iii) their distances from the forest fragments, influence seed dispersal. We installed 18 seed traps in each of six pastures (total=108 traps) bordering forest fragments distributed over 6 distance classes from the forest edges (0, 5, 10, 20, 40 and 80 m). We determined the characteristics of the plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal dispersal; Crown coverage; Isolated trees; Pastures; Seed rain. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300486 |
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| Bechara,Fernando Campanhã; Reis,Ademir; Bourscheid,Kurt; Vieira,Neide Koehntopp; Trentin,Bruna Elisa. |
| 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 and the initial dynamics of the seedlings of Pinus elliottii var elliottii through field and laboratory experiments. We recorded a continuous seed rain of about 204.0 viable seeds m- 2 per year, with a 90 % germination rate. The seeds exhibited a low longevity of viability in the soil and a dense, permanent seedling bank that may explain the high levels of pine invasion. The environmental impact caused... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Slash pine; Germination; Seed bank; Seed rain; Seedling dynamics. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000200005 |
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| Bonvissuto,GL; Busso,CA. |
| Seed rain has ecological consequences on plant community structure. This study was conducted in the Monte Austral Neuquino nearby the town of Picún Leufú, Province of Neuquén, Argentina, within an area of 15 km x 15 km (39º 20 32' S; 69º19 30' W). Studies were conducted at two sites, distant 1.5 km from one another. Vegetation is distributed on the soil surface as vegetation patches. Four superficial locations may be found in the soil of these patches: location 1, small dune accumulated under the lee; location 2, found at the edge of the small dune, and below the major grass canopies and tallest shrubs; location 3, located at the edge of the vegetation patch, and location 4 which includes the uncovered corridors among vegetation patches. Seed rain was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed rain; Shrub and grass species; Vegetation patches; Arid Argentina. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100005 |
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