Input of wind–dispersed seeds into light–gaps and forest sites in a Neotropical forest

Augspurger, Carol K.; Franson, Susan E.

doi:10.1017/s0266467400002807

Cited by 78 publications

(68 citation statements)

References 10 publications

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“…Several studies have also suggested that wind-dispersed seeds may arrive in gaps at higher densities than in adjacent forests due to small-scale turbulence, but evidence remains equivocal (e.g. Augspurger & Franson 1988;Bailing et al 2002). Much less noted is the opposite pattern -disproportionate dispersal to understorey sites.…”

Section: Patternsmentioning

confidence: 99%

Seed dispersal of woody plants in tropical forests: concepts, examples and future directions

Muller‐Landau

Hardesty²

2005

Biotic Interactions in the Tropics

102

128

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Section: Patternsmentioning

confidence: 99%

Seed dispersal of woody plants in tropical forests: concepts, examples and future directions

Muller‐Landau

Hardesty²

2005

Biotic Interactions in the Tropics

102

128

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“…Entre vários métodos para o estudo de eventos fenológicos, diversos autores utilizaram peneiras coletoras para estudos da chuva de sementes (Jackson 1981, Augspurger & Franson 1988, Schupp 1990, Lugo & Frangi 1993, Walker & Neris 1993, Chapman et al 1994, Greene & Johnson 1994, Herrera et al 1994, White 1994) e de aspectos da fenologia (Jackson 1978, Wright & van Schaik 1994 em comunidades vegetais nos trópicos. Entre as vantagens apresentadas para este método está a facilidade de distinção entre botões e flores e entre frutos imaturos e maduros, dificilmente distingüíveis pela simples observação em algumas espécies (Bullock & Sollis-Magalhanes 1990).…”

Section: Introductionunclassified

Floração e chuva de sementes em mata secundária em São Paulo, SP

Penhalber¹,

Vani²

1997

Rev. bras. Bot.

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-(Flowering and seed rain in a secondary forest in São Paulo, southeastern Brazil). Flowering and seed rain in a secondary forest in São Paulo, southeastern Brazil, were studied through the collection of reproductive material obtained from seed traps of 0.5 x 0.5 m. Collections were made on a monthly basis between January and December, 1993. Ninety species belonging to 37 families were identified in the collected reproductive material. Seasonal flowering and fruiting patterns were observed in the forest. The majority of the species flowered from September; peaks in the flower and fruit abundance were observed in November. The flowering pattern was the same observed in other forests of the region, but the fruiting pattern was more seasonal. From the seed rain, it could be deduced that the anemochorous species dispersed their seeds mainly in November, at the onset of the rainy season and not in the dry season as was expected. The majority of zoochorous species dispersed their seeds during the middle of the rainy season, with a peak in January, when the conditions for fruit ripening, seed dispersal and seedling establishment were optimal. The largest quantity of seeds was produced by the lianas while the group of trees was the richnest in species.RESUMO -(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 novembro, no início das chuvas e não durante a estação seca, como esperado. A maioria das espécies zoocóricas liberou propágulos durante o meio da estação chuvosa, com pico em janeiro, na época de melhores condições de amadurecimento do fruto, dispersão de sementes e estabelecimento de plântulas. As lianas produziram a maior quantidade de propágulos, enquanto das arbóreas obteve-se o maior número de espécies.

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“…As in Panama lowland terra firme forest and gaps, most of the seed rain was from animal-dispersed species, but more wind-dispersal species were found in the gaps compared to the forests (Augspurger and Franson 1988). Seeds were again mainly from species-rich families such as Melastomataceae, Piperaceae, and Rubiaceae.…”

Section: Comparison To Other Neotropic Studiesmentioning

confidence: 92%

“…The forests themselves were 200 m apart. In the center of each forest area and each gap area, seed traps were established and soil samples were taken in late June 2004 (Augspurger and Franson 1988) for a total of 20 microsites (2 forest-types [terra firme vs. várzea] × 2 openness-types [gap vs. non-gap/intact forest] × 5 replicates). Seed rain was collected using standard 1 m 2 area seed traps (see Myster and Sarmiento 1998) placed in the center of microsite and identified to species for a total sampling area of 20 m 2 .…”

Section: Methodsmentioning

confidence: 99%

Interactive effects of flooding and treefall gap formation onterra firmeforest andvárzeaforest seed and seedling mechanisms and tolerances in the Ecuadorean Amazon

Myster¹

2014

Community Ecology

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Abstract:The influence of white-water flooding and treefall gap formation on terra firme forest regeneration was investigated in Yasuni National Park of western Ecuador. I set up seed traps, collected seed rain and soil samples, and set out seeds and seedlings in unflooded terra firme forest (dry) and its gaps, and in nearby white-water floodplain várzea forest (wet) and its gaps. I found that (1) total number of dispersed seeds was greatest in the dry gaps with more seeds and greater richness in the gaps than the forest for both forest types, (2) the greatest number of seedlings germinated from wet gap soils with the least from the dry forest with gaps having more seedlings compared to their respective forests, (3) on average 30% of seeds remained after two weeks in the field and species seed losses were significantly different in all but one of the four sites, (4) more large seeds than small seeds were lost to pathogens and those losses were greater in the forests than the gaps, (5) as seed mass increased seedlings survival rates also increased but growth rates declined, and (6) more seedlings survived in gaps compared to closed forests where they grew faster with a larger leaf area ratio. Past sampling has shown that species composition differed between forest types, and present results show that the greatest seed and seedlings losses and the slowest growth rates were in intact terra firme forest, there were medium losses and medium growth rates in terra firme gaps and in the intact várzea forest, and the smallest losses and fastest growth rates were found in várzea gaps.

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Input of wind–dispersed seeds into light–gaps and forest sites in a Neotropical forest

Cited by 78 publications

References 10 publications

Seed dispersal of woody plants in tropical forests: concepts, examples and future directions

Seed dispersal of woody plants in tropical forests: concepts, examples and future directions

Floração e chuva de sementes em mata secundária em São Paulo, SP

Interactive effects of flooding and treefall gap formation onterra firmeforest andvárzeaforest seed and seedling mechanisms and tolerances in the Ecuadorean Amazon

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