SciELO - Scientific Electronic Library Online

 
vol.88 issue1Antinociceptive and anti-inflammatory effects of a Geissospermum vellosii stem bark fractionMorpho-anatomy and ontogeny of the underground system of Chrysolaena simplex (Less.) Dematt. (Asteraceae) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Anais da Academia Brasileira de Ciências

Print version ISSN 0001-3765On-line version ISSN 1678-2690

Abstract

DONADEL, LETÍCIA; CARDOSO, LUCIANA DE S.  and  TORGAN, LEZILDA C.. Plankton community dynamics in a subtropical lagoonal system and related factors. An. Acad. Bras. Ciênc. [online]. 2016, vol.88, n.1, pp.249-267.  Epub Feb 02, 2016. ISSN 0001-3765.  https://doi.org/10.1590/0001-3765201520150022.

Changes of the plankton community in a shallow, subtropical lagoonal system and its relation to environmental conditions were investigated during an annual cycle to provide information on its spatial and seasonal variation pattern. The study carried out at four sites (three in the Peixe lagoon and one in the Ruivo lagoon), which are located in the Lagoa do Peixe National Park, southern Brazil. The system has a temporary connection to the Atlantic Ocean by a narrow channel. The phytoplankton density was higher in the Peixe lagoon whereas the specific richness was higher in the Ruivo lagoon which is also a site with the lower salinity. The phytoplankton biomass near the channel showed seasonal variation with the highest value in fall and lowest in winter. Zooplankton richness was inversely correlated with salinity, and had the highest values in the Ruivo lagoon. Ordination analysis indicated seasonal and spatial patterns in plankton community in this lagoonal system, related to variation in salinity. In addition, the wind action and precipitation were important factors on the spatial and seasonal salinity changes in the lagoon with direct influence on the plankton community dynamics.

Keywords : coastal lagoon; microalgae; Ramsar site; South Brazil.

        · abstract in Portuguese     · text in English     · English ( pdf )