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	Provedor de dados Acta Botanica (3) Rev. Bras. Bot. (1) Autor Christianini,Alexander V. (4) Koch,Ingrid (1) Mariano,Vanessa (1) Messias,Patrícia Aparecida (1) Vidal Jr.,João de Deus (1) Palavra-chave Seed predation (3) Crop size (2) Seed dispersal (2) Brazil (1) Brazilian Atlantic Forest (1) Erythroxylum pelleterianum (1) Floresta Atlântica (1) Fragmentação de hábitat (1) Habitat fragmentation (1) Hipótese de liberação de inimigos naturais (1) Host compatibility (1) Invasão biológica (1) Janzen-Connell hypothesis (1) Large seeds (1) Palms (1) Prevalence (1) Savanna (1) Seed number (1) Seed size (1) Seed survival (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2018 (1) 2016 (1) 2014 (1) 2006 (1) País Brazil (4) Idioma Inglês (3) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Fecundidade, dispersão e predação de sementes de Archontophoenix cunninghamiana H. Wendl. &amp; Drude, uma palmeira invasora da Mata Atlântica Rev. Bras. Bot. Christianini,Alexander V.. Conhecer a biologia de espécies invasoras pode auxiliar na escolha de estratégias de manejo visando seu controle. Este estudo enfoca a fenologia, produção e dispersão de sementes de Archontophoenix cunninghamiana, uma palmeira nativa da Austrália que está invadindo fragmentos de Mata Atlântica. O estudo foi desenvolvido num fragmento florestal de 10 ha (Mata da Cuaso 23º34' S, 46º43' W). Archontophoenix produziu frutos ao longo do ano, apresentando frutos maduros principalmente de outubro a fevereiro. As árvores atingem a maturidade com 18,5 cm DAP, cada uma produzindo 4.119 ± 1.922 sementes ano-1. Aves dispersam as sementes de Archontophoenix e 15% das sementes sobrevivem a predação pós-dispersão até o tempo requerido para germinação. O padrão espacial de... Tipo: Info:eu-repo/semantics/article Palavras-chave: Floresta Atlântica; Fragmentação de hábitat; Hipótese de liberação de inimigos naturais; Invasão biológica. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000400008 Crop size influences pre-dispersal seed predation in the Brazilian Cerrado Acta Botanica Christianini,Alexander V.. ABSTRACT Many pre-dispersal seed predators are specialized insects that rely on seeds for larval development. These insects may respond to the amount of seeds produced by a plant (i.e. crop size), increasing the proportion of seeds damaged with increases in seed numbers. Large seeds have more resources and spend more time in plants to complete their development and are probably more prone to be preyed on by those insects than small seeds. Here I tested how crop size and seed mass influence pre-dispersal seed predation in plants from the Cerrado savannas of Brazil. I related plant crop size to pre-dispersal seed predation for Xylopia aromatica and Erythroxylum pelleterianum. A literature review was performed to test if seed mass may explain among-species... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Crop size; Erythroxylum pelleterianum; Savanna; Seed number; Seed predation; Seed size; Seed survival; Xylopia aromatica. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100135 Host specificity and experimental assessment of the early establishment of the mistletoe Phoradendron crassifolium (Pohl ex DC.) Eichler (Santalaceae) in a fragment of Atlantic Forest in southeast Brazil Acta Botanica Messias,Patrícia Aparecida; Vidal Jr.,João de Deus; Koch,Ingrid; Christianini,Alexander V.. Mistletoe establishment relies heavily on a seed reaching a proper host plant. Small frugivorous birds usually disperse large numbers of mistletoe seeds. However, in the field, mistletoes are absent from some potential available hosts. We investigated whether the mistletoe Phoradendron crassifolium has some preferences for specific host trees in a fragment of Atlantic Forest in southeast Brazil. We surveyed 397 tree individuals of 50 species within 25 families. Seven of those species (14%) bore P. crassifolium infections. Although prevalence at the individual level was low (11.6%), there were marked deviations in infection levels among species and families. Most (87%) of the infections (40 of 46) occurred in species belonging to the families Anacardiaceae... Tipo: Info:eu-repo/semantics/article Palavras-chave: Host compatibility; Prevalence; Seed dispersal; Seed predation. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400012 Reproductive phenology, seed removal and early regeneration in relation to distance from parental plants of a native palm in small Atlantic forest fragments Acta Botanica Mariano,Vanessa; Christianini,Alexander V.. ABSTRACT The Brazilian Atlantic Forest is a global biodiversity hotspot, but most of what remains are small fragments. Small fragments are often harsh environments for forest plant recruitment due to edge effects and the loss of frugivorous animals that provide seed dispersal. We recorded the one-year reproductive phenology of the keystone palm Syagrus romanzoffiana in small (<2.5ha) Atlantic Forest fragments in southeastern Brazil. We tested the Janzen-Connell hypothesis with seed-removal experiments and followed the five-year survival of recruits in relation to the distance from parental plants. Palms produced many fruits throughout the year (mean 2,600/plant). More seedlings were found away from parental plants than near them, thereby supporting the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian Atlantic Forest; Crop size; Habitat fragmentation; Janzen-Connell hypothesis; Large seeds; Palms; Seed dispersal; Seed predation; Seedling survival; Syagrus romanzoffiana. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200176 Registros recuperados: 4 Primeira ... 1 ... Última

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