Padrões morfológicos de diásporos de árvores e arvoretas zoocóricas no Parque Estadual de Itapuã, RS, Brasil

Wiesbauer, Manuela Boleman; Giehl, Eduardo Luís Hettwer; Jarenkow, João André

doi:10.1590/s0102-33062008000200012

Cited by 16 publications

(12 citation statements)

References 40 publications

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“…Th e dispersal modes associated with the strata of vegetation and the kinds of environments directly infl uence the dispersive capacity and geographic distribution of plant species (Fenner 1985;Lorts et al 2008). By knowing the dispersal syndromes and the morphological patterns of the fruits of a plant community may help to elucidate various issues on plant-animal interactions and on different colonization strategies of plants in the environments (Howe & Westley 1997;Galetti et al 2006;Wiesbauer et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Evolution of seed dispersal in the Cerrado biome: ecological and phylogenetic considerations

Kuhlmann

Ribeiro

2016

Acta Bot. Bras.

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Th e investigation of the phylogeny of a group of organisms has the potential to identify ecological and evolutionary processes that have been occurring within a community. Seed dispersal is a key process in the life cycle of vegetation and refl ects diff erent reproductive strategies of plants to a set of ecological and evolutionary factors. Knowing the dispersal syndromes and fruits types of a plant community may help elucidate plant-animal interactions and colonization strategies of plants. We investigated dispersal syndromes and fruit types in Cerrado formations as a parameter for understanding the evolution of angiosperm reproductive strategies in this mega-diverse tropical biome. To do this we identifi ed and mapped the distribution of diff erent parameters associated with seed dispersal on a phylogeny of Cerrado angiosperms genera and tested the presence of phylogenetic signal. Th e results showed that there were strong relationships between fruit types, seed dispersal strategies and vegetation life forms and that these traits were closely related to angiosperms phylogeny and, together, contribute to the evolution of plants in the forest, savanna and grassland formations of the Cerrado biome.

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Section: Introductionmentioning

confidence: 99%

Evolution of seed dispersal in the Cerrado biome: ecological and phylogenetic considerations

Kuhlmann

Ribeiro

2016

Acta Bot. Bras.

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“…Fruits with fl eshy tissues are an important food resources for a wide variety of animals, and the availability of fruit in a given location can infl uence the abundance and diversity of these frugivores (Jordano & Herrera 1995;Howe & Westley 2009). Knowing the morphology of fruits and dispersal units in a plant community may help to better understand plant-animal interactions and the diff erent plant colonization strategies Wiesbauer et al 2008;Howe 2016).…”

Section: Introductionmentioning

confidence: 99%

Fruits and frugivores of the Brazilian Cerrado: ecological and phylogenetic considerations

Kuhlmann

Ribeiro

2016

Acta Bot. Bras.

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Knowing the morphological and phylogenetic patterns of fruits of a plant community may elucidate plant-frugivore interactions, and analysis of dispersal syndromes is a practical approach to understanding these mutualisms. We investigated diff erent zoochorous fruits and frugivorous animals among Cerrado formations (forest, savanna and grassland), mapped dispersal syndromes on a Cerrado angiosperm phylogeny and tested for phylogenetic signal. For a core region in Cerrado, we found that, among almost a thousand fruit species and 258 fruit-eating vertebrates, 60% of the fruits had an ornithochorous syndrome and that 70% of the frugivores were birds. Most fruit and frugivorous species (~80%) inhabit forest formations, but many of them also occurred in more than one Cerrado formation. Th e zoochorous syndromes were found to have little phylogenetic signal, with many plant families exhibiting more than one fruit syndrome, and with ornithochory being widely distributed throughout the phylogeny. Our results suggest that plant-frugivore interactions tend to be evolutionarily labile in this Neotropical region, although birds have had a prominent role in fruit evolution. Furthermore, we found that all three Cerrado formations seem to be interrelated in maintaining functional stability of the plant-frugivore mutualisms in the Cerrado biome.

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“…As famílias Sapotaceae, Chrysobalanaceae e Arecaceae, cujos diásporos zoocóricos são maiores, obtiveram maior riqueza na floresta em estádio avançado. Por outro lado, as famílias Melastomataceae, Rubiaceae e Solanaceae, com diásporos zoocóricos menores (Wisbauer et al 2008), estiveram presentes em áreas mais perturbadas. Essas observações foram apontadas também por Tabarelli & Mantovani (1999a).…”

Section: Discussionunclassified

Comparação florística e estrutural entre dois trechos de Floresta Ombrófila Densa em diferentes estádios sucessionais, Juquitiba, SP, Brasil

Polisel

Franco

2010

Hoehnea

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-(Floristic and structural comparisons of two tracts in different successional stages in Rain Forest in Juquitiba, São Paulo, State, Southeastern of Brazil). This study was carried out in medium and late regeneration stage tracts. Medium regeneration stage tract was sub-divided in 4 community classes: Class 1 (DBH ≥ 10 cm); Class 2 (5 ≤ DBH < 10 cm); Class 3 (1 ≤ DBH < 5 cm) and Class 4 (0,1 ≤ height < 1,3 m). In late stage forest, 166 points centered-quarter was plotted to woody individuals sampling (DBH ≥ 10 cm). The floristic and phytosociological parameters of secondary forest were lower than mature forest ones. Futhermore, the low values on richness and abundance of late species in secondary forest demonstrates that some mature forest species have difficult in spreading due to the lack of dispersal species, mainly the big ones, and human impacts on these animals. Key-words: Atlantic Forest, regeneration, secondary sucession, understory RESUMO -(Comparação florística e estrutural entre dois trechos de Floresta Ombrófila Densa em diferentes estádios sucessionais, Juquitiba, SP, Brasil). Foi realizado o levantamento fitossociológico em dois trechos florestais, um em estádio médio e outro em estádio avançado de regeneração. A amostragem foi subdividida em quatro estratos para o fragmento em estádio médio: Estrato 1 (DAP ≥ 10 cm); Estrato 2 (5 ≤ DAP < 10 cm); Estrato 3 (1 ≤ DAP < 5 cm) e Estrato 4 (0,1 ≤ h < 1,3 m). Na floresta em estádio avançado, foram alocados 166 pontos quadrantes para a amostragem das árvores (DAP ≥ 10 cm). Os parâmetros florísticos e fitossociológicos da floresta em estádio médio atingiram valores inferiores ao verificado na floresta conservada. Os baixos valores de riqueza e abundância das espécies secundárias tardias na floresta em estádio médio sugerem sua dificuldade de se dispersarem na região. A falta de agentes dispersores, principalmente aqueles de maior porte, e a pressão antrópica sobre a avifauna podem ser um dos motivos para explicar o comportamento encontrado para as espécies secundárias tardias de diásporos maiores. Palavras-chave: floresta atlântica, regeneração, sucessão secundária, sub-bosque. IntroduçãoA Mata Atlântica representa um dos ecossistemas mais ameaçados do planeta, por possuir número de espécies endêmicas elevado, riqueza biológica e alto grau de ameaça aos seus remanescentes florestais. Por esses motivos, é considerada um dos 25 hot-spots de megadiversidade no mundo (Myers et al. 2000).Segundo levantamento realizado pela ONG SOS Mata Atlântica e pelo Instituto Nacional de Pesquisas Espaciais (INPE) (Fundação SOS Mata Atlântica/INPE 2008), esse Bioma possuía 7,26% da cobertura original em 2005. Dessa cobertura, a maioria dos remanescentes é menor que 10 ha, o que denota a fragilidade na manutenção da biodiversidade, por problemas relacionados principalmente ao efeito de borda e ação antrópica (Tabarelli et al. 1999). Kronka et al. (2005) mostraram que o Estado apresenta hoje apenas 13,94% da cobertura florestal original, entretanto a metade delas foi ...

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Padrões morfológicos de diásporos de árvores e arvoretas zoocóricas no Parque Estadual de Itapuã, RS, Brasil

Cited by 16 publications

References 40 publications

Evolution of seed dispersal in the Cerrado biome: ecological and phylogenetic considerations

Evolution of seed dispersal in the Cerrado biome: ecological and phylogenetic considerations

Fruits and frugivores of the Brazilian Cerrado: ecological and phylogenetic considerations

Comparação florística e estrutural entre dois trechos de Floresta Ombrófila Densa em diferentes estádios sucessionais, Juquitiba, SP, Brasil

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