气候变化领域集成服务门户(CCPortal): Blowdown disturbance effect on the density, richness and species composition of the seed bank in Central Amazonia

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DOI	10.1016/j.foreco.2019.117633
	Blowdown disturbance effect on the density, richness and species composition of the seed bank in Central Amazonia
	Bordon N.G.; Nogueira A.; Leal Filho N.; Higuchi N.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Windstorms, known as blowdowns, create large canopy gaps in the tropical rainforest. Despite the occurrence of blowdowns in Central Amazonia, no studies have yet investigated the seed bank in areas altered by blowdown in the Amazon rainforest. The seed bank plays an important role in the regeneration of larger natural gaps, and changes in, or partial loss of, seed bank can modify the successional dynamics locally. In the present study, we compared the density, richness and floristic composition of a seed bank in a post-blowdown secondary forest with approximately six years old and a continuous forest. The seed bank was characterized by collecting 160 soil samples systematically distributed in each forest type at two different times. Samples were collected at a minimum distance of 30 m from each other, sampling the superficial soil 5 cm in depth and 20 cm in diameter. At each sampling point, the slope and canopy openness was also measured. The density and floristic composition of the seed bank was estimated using counts of seedlings that had emerged in a nursery of the collected soil samples. The post-blowdown secondary forest exhibited seed banks 30% denser and 20% richer, on average, than continuous forest. The floristic composition also differed between forest types, with a predominance of Melastomataceae, Urticaceae, and Araceae in the secondary forest, followed by Cyperaceae and Moraceae; however, these did not differ between forest types. In contrast, for other families, greater richness and density were observed in the continuous forest. Higher density and richness of trees, shrubs, epiphytes, and hemiepiphytes were observed in the secondary forest, except for the richness of epiphytes. In general, terrain slope was unrelated to density, richness and floristic composition of the seed bank. Under a disturbance of great magnitude, such as a blowdown, the density and richness of the seed bank were not reduced; on the contrary, its potential for local regeneration was maintained. Despite the limited contribution of the seed bank to the regeneration of climax species, the seed bank was shown to be diverse in species, including different life forms, and may contribute to the regeneration of forest strata, even after severe disturbances. © 2019 Elsevier B.V.
英文关键词	Araceae; Forest disturbance; Large gaps; Melastomataceae; Tree fall
语种	英语
scopus关键词	Soil surveys; Soils; Storms; Araceae; Forest disturbances; Large gaps; Melastomataceae; Tree fall; Reforestation; climax; environmental disturbance; floristics; population density; regeneration; secondary forest; seed bank; species richness; terrain; treefall; Density; Reforestation; Samples; Sampling; Secondary Forest; Seedlings; Slope; Soil; Amazonia; Araceae; Cyperaceae; Melastomataceae; Moraceae; Urticaceae
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155707
作者单位	Programa de Pós-Graduação em Botânica, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Aleixo, Manaus, Amazonas 69060-001, Brazil; Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Arcturus, Jardim Antares, São Bernardo do Campo, São Paulo, 09606-070, Brazil; Departamento de Ecologia, Instituto Nacional de Pesquisas da Amazônia, Av. André André Araújo, 2936, Petrópolis, C.P. 478, Manaus, Amazonas 69060-001, Brazil; Departamento de Silvicultura Tropical, Manejo Florestal, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Petrópolis, C.P. 478, Manaus, Amazonas 69067-375, Brazil
推荐引用方式 GB/T 7714	Bordon N.G.,Nogueira A.,Leal Filho N.,et al. Blowdown disturbance effect on the density, richness and species composition of the seed bank in Central Amazonia[J],2019,453.
APA	Bordon N.G.,Nogueira A.,Leal Filho N.,&Higuchi N..(2019).Blowdown disturbance effect on the density, richness and species composition of the seed bank in Central Amazonia.Forest Ecology and Management,453.
MLA	Bordon N.G.,et al."Blowdown disturbance effect on the density, richness and species composition of the seed bank in Central Amazonia".Forest Ecology and Management 453(2019).