Data/hora: 12/06/2024 17:10:25

Provedor de dados: | 57
País: | Brazil
Título: | Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)
Autores: | SOUZA,M. F. L. de; COUTO,E. C. G.
Data: | 1999-05-01
Ano: | 1999
Palavras-chave: | Estuary; Short-term changes; Primary production; Mineralization; Microphytobenthos.
Resumo: | Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by sigmaCO2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 mug.l-1, being higher at the upper estuarine station than marine ones. Net pelagic metabolic rates ranged from -13.2 to 61.2 mgC.m7-2.d-1. Presence of mucilaginous algal material can explain the net mineralization. In the photic period, NPM ranged from-0.05 to 3.04 mgC.m-2h-1. NEM ranged from -7.77 to 6.65 mgC.m-2.d-1. Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates (mineralization). Benthic metabolism was inferred by net system minus pelagic metabolism. Microphytobenthic community seems to be the main responsible for system metabolism, specially in the upper estuary, although the anthropogenic inputs exert strong long term influence.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200003
Editor: | Instituto Internacional de Ecologia
Relação: | 10.1590/S0034-71081999000200003
Formato: | text/html
Fonte: | Revista Brasileira de Biologia  v.59 n.2 1999
Fonte: | info:eu-repo/semantics/openAccess