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Invasion impact by Pteridium arachnoideum (Kaulf.) Maxon (Dennstaedtiaceae) on a neotropical savanna Acta Botanica
Guerin,Natalia; Durigan,Giselda.
Whether management intervention is required to control biological invasions depends primarily on demonstrating species losses resulting from such invasions. Brackens of the Pteridium genus are currently regarded as a problem species that act as important ecological filters in the assembly of invaded communities. We investigated the effects of Pteridium arachnoideum invasion on the diversity, structure, floristic composition, and functional traits of cerradão in Assis, São Paulo, Brazil. We compared an invaded site with an adjacent non-invaded site. Bracken constrained the establishment of tree species, resulting in a community structure remarkably distinct from the non-invaded area. The density and basal area of the arboreal community were higher in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Assembly rules; Bracken; Brazil; Cerradão; Ecological filters; Ecosystem management.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200213
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Permeability - impermeability: canopy trees as biodiversity filters Scientia Agricola
Gandolfi,Sergius; Joly,Carlos Alfredo; Rodrigues,Ricardo Ribeiro.
Each tropical and subtropical forest canopy species may create specific microsite conditions below its crown, which works as a filter for those species that attempt to regenerate below it. In function of the permeability or impermeability level, each canopy species could partially determine a plant community structure and composition beneath its crown projection. Therefore, present and future forest plant community biodiversity could be partially determined by the present structure of the canopy tree species community (filter effect). Some theoretical and practical aftermaths are suggested.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Tropical forest dynamics; Tree regeneration; Gap dynamics; Ecological filters; Forest biodiversity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400015
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