Data/hora: 16/06/2024 09:42:59

Provedor de dados: | 39
País: | Brazil
Título: | The effects of seasonal change of water level in an estuary on Ludwigia octovalvis (Jacq.) P. H. Raven (Onograceae) growth
Autores: | Ribeiro,Jose Pedro Nepomuceno; Matsumoto,Reginaldo Sadao; Lima,Maria Inês Salgueiro.
Data: | 2012-12-01
Ano: | 2012
Palavras-chave: | Etiolation; Estuary ecology; Stress; Submergence; Tidal.
Resumo: | The Massaguaçu River estuary is an irregular estuary with sandbar breaching cycles that are irregular and happen several times each year. The species Ludwigia octovalvis is a perennial weed in several places around the world, but it is seasonal in the Massaguaçu River. In this survey we determined the relationship between the rain, estuary water level variation, and the spatial and temporal distribution of this species. In a laboratory we simulated the water level variation in water tanks in order to understand how this species responds to flooding. In the field, we determined the distribution of L. octovalvis in the higher pluviose season and in the lower pluviose season. This species is relatively common in the higher pluviose season and completely absent in the lower one. There is strong evidence that this happens due to the longer and deeper sandbar breaching cycles during the dry season, which induce this species to etiolation, and, therefore, mechanical fragility. The seasonality of species in aquatic environments that do not have a dry biological season is unusual and little studied.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000400017
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/S0102-33062012000400017
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.26 n.4 2012
Fonte: | info:eu-repo/semantics/openAccess