FATORES ASSOCIADOS À DISTRIBUIÇÃO ESPACIAL DO FITOPLÂNCTON EM LAGOS DE INUNDAÇÃO (PANTANAL NORTE, BRASIL)

Atualmente, o conhecimento acerca dos fatores direcionadores das comunidades nos ecossistemas tem-se tornado cada vez mais importante para suplementar modelos ecossistemicos e embasar medidas de manejo e recuperacao de habitat. No entanto, esses fatores ainda nao sao bem conhecidos em ambientes tropicais e especialmente em planicies de inundacao. Este estudo teve por objetivo avaliar os efeitos dos fatores locais e espaciais na composicao e abundância da comunidade fitoplanctonica em diferentes epocas do periodo de aguas altas. Quatorze lagoas marginais ao rio Cuiaba, Pantanal de Pocone, MT, foram amostradas quinzenalmente entre janeiro e abril de 2007. Para analise do padrao espacial da composicao e abundância dos taxons fitoplanctonicos realizou-se um correlograma multivariado de Mantel. Para testar o efeito dos fatores locais foram utilizadas como variaveis as caracteristicas limnologicas dos sistemas (profundidade, transparencia da agua, temperatura, condutividade, pH e alcalinidade) e a densidade zooplanctonica. Durante  o periodo de amostragem a comunidade fitoplanctonica esteve representada principalmente pelas classes Cyanophyceae (maior riqueza) e Cryptophyceae (maior abundância). A riqueza e abundância fitoplanctonicas apresentaram valores individualizados nas lagoas. Relacoes significativas foram encontradas entre a composicao fitoplanctonica e as variaveis limnologicas dos sistemas (p = 0,003), porem foram fracamente relacionadas a densidade zooplanctonica. De maneira geral, a variacao espacial nao foi um fator direcionador e os componentes locais se mostraram como os mais importantes para a comunidade fitoplanctonica dos ambientes investigados.

• Publication year

  2012

• Venue

  Oecologia Australis

• Publication date

  Unknown publication date

• Fields of study

  Not labeled

• Identifiers
  DOI 10.4257/OECO.2012.1604.04
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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