Fenologia, ecologia da polinizaÃÃo e reproduÃÃo de espÃcies de manguezal, no municÃpio de Goiana - PE

AUTOR(ES)

Tarcila Correia de Lima Nadia

DATA DE PUBLICAÇÃO

2009

RESUMO

The mangal is a tropical ecosystem of the coastal and estuarine areas, and it is important to shelter the marine animals and for its reproduction, beside promote the increase of productivity of neighbor community. Its vegetation, the mangrove, is composed of a few species with proper feature, such as viviparity and aerial roots associated with breath. There are a few studies about phenological patterns and the pollination and breeding systems of mangrove species, which is basic to management and conservation of this ecosystem. Thus, we analyzed these aspects in the mangrove species of Pernambuco State, Northeastern of Brazil, for the purpose of improve the knowledge of the dynamic of community. The reproductive phenology of four mangrove species, Avicennia schaueriana (Acanthaceae), Conocarpus erectus, Laguncularia racemosa (Combretaceae) and Rhizophora mangle (Rhizophoraceae) was monitored monthly during four years. Pollination and breeding systems was also investigated to every species. The flowering of the community presented continuous and bimodal pattern, peaking in the wet and dry season. Fruiting was also continuous, but it presented seasonal and unimodal pattern with one peak in the wet season. Rhizophora mangle was anemophilous with continuous flowering and fruiting patterns. The others species were generalized entomophilous, and visited by diverse pollinators group, such as, bees, butterflies, flies and wasps. The Palpada albifrons was the main pollinator of the three species. The flowering of these species occurred in sequence a long the year. There was overlap among the flowering of each species, but the peaks occurred in distinctive times, that enabled the constancy of pollinators at the community and favored the increase of reproductive success by facilitation. All mangrove species were self-compatible and the majority was autogamic, excepting for A. schaueriana. Nevertheless, the higher fruit set mediated by natural pollination, shows the importance of pollination vector, whether abiotic or biotic. Although the self-compatibility, every species presented a reproductive strategy to favor cross pollination and the maintenance of genetic variability on the population, such as protandry in A. schaueriana and R. mangle, gynodioecy in L. racemosa, and andromonoecy associated with protogyny in C. erectus

ASSUNTO(S)

botanica phenology pollination sistema reprodutivo fenologia avicennia schaueriana laguncularia racemosa rhizophora mangle conocarpus erectus, rhizophora mangle mangrove conocarpus erectus laguncularia racemosa reproductive systems avicennia schaueriana mangue polinizaÃÃo

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