Variações espaço-temporais no estoque de sementes do solo na floresta amazônica

Filho, Niwton Leal; Sena, Juliana dos Santos; Santos, Gisele Rodrigues dos

doi:10.1590/s0044-59672013000300006

Cited by 14 publications

(14 citation statements)

References 32 publications

(19 reference statements)

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“…Esses resultados corroboram a hipótese inicial deste estudo de que a composição florística do banco de sementes é em grande parte variável no tempo, sugerindo a possibilidade de diferentes caminhos sucessionais em grandes clareiras abertas em áreas preservadas, em estações distintas do ano, já que o banco de sementes é o principal mecanismo de regeneração na fase inicial de estabelecimento de pioneiras nessas áreas; esse padrão também se destacou em Grombone-Guaratini & Rodrigues (2002) e Leal-Filho et al (2013).…”

Section: Discussionunclassified

O banco de sementes e suas implicações na diversidade da Floresta Ombrófila Densa Submontana no Parque Estadual Carlos Botelho, São Paulo, SP, Brasil

Souza

Rodrigues

Joly

2017

Hoehnea

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-(The seed bank and its implications for the diversity of the Submontane Ombrophilous Dense Forest in the Parque Estadual Carlos Botelho, São Paulo State, Brazil). This study aimed to characterize the composition and dynamics of the species present in the seed bank within the Parque Estadual Carlos Botelho, in a permanent plot of 10 ha subdivided into 256 sub-plots of 20 × 20 m. From these, 25 sub-plots were randomly selected, from which three soil samples of 0.25 × 0.25 × 0.05 m were collected. As a result, 3,204 seeds of 93 species were germinated. The arboreal life form presented 50% of the total germinated seeds, of which 97% were intolerant to shade and 3% tolerant. The dominant dispersal syndrome was the zoochory. The floristic similarity between collectings was low and there was high spatial variation of species. We accept the hypotheses that the species present in the seed bank are predominantly shrubs and trees, shade intolerant and zoochoric, and that the floristic composition varies in time and space. Keywords: ecological groups, natural regeneration, seed dispersal, shade-tolerance RESUMO -(O banco de sementes e suas implicações na diversidade da Floresta Ombrófila Densa Submontana no ParqueEstadual Carlos Botelho, São Paulo, SP, Brasil). Este estudo teve como objetivo caracterizar a composição e dinâmica das espécies presentes no banco de sementes no interior do Parque Estadual Carlos Botelho, em uma parcela permanente de 10 ha, subdividida em 256 subparcelas de 20 × 20 m. Destas, foram sorteadas 25 subparcelas, das quais foram coletadas três amostras de solo de 0,25 × 0,25 × 0,05 m. Germinaram 3.204 sementes de 93 espécies, a forma de vida arbórea representou 50% do total de sementes germinadas, dentre estas 97% eram intolerantes à sombra e 3% tolerantes. A síndrome de dispersão dominante foi a zoocórica. A similaridade florística entre coletas foi baixa e ocorreu alta variação espacial das espécies. Aceitamos as hipóteses de que as espécies presentes no banco de sementes são predominantemente arbustivas e arbóreas, intolerantes à sombra e zoocóricas e que a sua composição florística varia no tempo e no espaço. Palavras-chave: dispersão de sementes, grupos ecológicos, regeneração natural, tolerância à sombra 1. Parte da Tese de Doutorado do primeiro Autor 2.

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Section: Discussionunclassified

O banco de sementes e suas implicações na diversidade da Floresta Ombrófila Densa Submontana no Parque Estadual Carlos Botelho, São Paulo, SP, Brasil

Souza

Rodrigues

Joly

2017

Hoehnea

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“…The species of the families Salicaceae, Siparunaceae, Moraceae and Ulmaceae germinated only in the seed bank in shading 70%. The most abundant botanical families, considering all the sample units, were Melastomataceae (9) and Fabaceae (5), other families presented only one species each.…”

Section: Floristics Wealth and Diversitymentioning

confidence: 99%

“…The study of the seed bank is related to different objectives, such as: potential and indicator of recovery of degraded areas; successional stage of vegetation; spatio-temporal variation; history of disturbance and others [6,7,8,9,10], providing information on the richness and floristic composition that will compose the vegetation in the future [2].…”

Section: Introductionmentioning

confidence: 99%

Soil Seed Bank in the Tropical Rainforest Inserted in Agricultural Matrix, Northeast Region of Brazil

Silva

Marangon

Feliciano

et al. 2019

JEAI

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This research aimed to evaluate under two conditions of luminosity the floristic composition of the seed bank the soil of a remnant of Atlantic Forest inserted in an agricultural matrix located in the northeastern region of Brazil. Sixty samples of superficial soil were collected, with a distance, of approximately, 50 meters. The samples were placed in polyethylene bags, identified and transported to the forest nursery of the Federal Rural University of Pernambuco where they were placed under two conditions of luminosity, full sun and 70% shading. Count of emerged seedlings was performed daily. They were considered as emerged after the opening of the protophyllum. At 120 days, the seedlings were removed and transplanted into polyethylene bags and left in beds and the soil was stirred to facilitate the germination of some viable seeds that might still exist. To compare the richness and number of seedlings emerged in the two light conditions, ANOVA was performed. There were 3,965 seedlings, belonging to 15 botanical families and 29 morphospecies.

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“…Temporal variation occurs as a result of both loss and incorporation of seeds in the soil [13,17]. The incorporation of seeds is the result of seed rain, which also presents seasonality owing to the different fruiting patterns of the species [9,18,19]. The rate of seed loss in the soil depends intrinsic loss of viability resulting from dispersal, environmental conditions, predation, and attack of pathogens [17,20,21].…”

Section: Introductionmentioning

confidence: 99%

Ecology of the Seed Bank in the Amazon Rainforest

Bordon¹,

Filho²,

Bentos³

2021

Ecosystem and Biodiversity of Amazonia

Self Cite

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The seed bank is directly related to forest resilience because it contributes to the greatest number of regenerants after the occurrence of disturbances. Changes in seed density, floristic composition, and life forms completely alter the successional trajectory of forest environments. These changes are directly related to land use. For example, suppression of the seed bank can occur in pastures, that experience frequent fires with increase of density of seeds and predominance of herbs are typical of highly degraded areas, such as Poaceae, Rubiaceae, Asteraceae, and Cyperaceae. Melastomataceae seedlings are an important component of the seed bank in the Amazon rainforest. On the other hand, Urticaceae has greater representation in forests that exhibit low-impact land use. Any change in seed bank functionality is bound to compromise the diversity, regeneration potential and overall maintenance of tropical forests. Therefore, it is necessary to expand studies that investigate seed banks in the Amazon rainforest. It is as important to prioritize sampling methods and pursue standardization of data presentation, as well as improve the identification of species that occur in the seed bank.

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Variações espaço-temporais no estoque de sementes do solo na floresta amazônica

Cited by 14 publications

References 32 publications

O banco de sementes e suas implicações na diversidade da Floresta Ombrófila Densa Submontana no Parque Estadual Carlos Botelho, São Paulo, SP, Brasil

O banco de sementes e suas implicações na diversidade da Floresta Ombrófila Densa Submontana no Parque Estadual Carlos Botelho, São Paulo, SP, Brasil

Soil Seed Bank in the Tropical Rainforest Inserted in Agricultural Matrix, Northeast Region of Brazil

Ecology of the Seed Bank in the Amazon Rainforest

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