Plankton community dynamics in a subtropical lagoonal system and related factors

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 o...

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Bibliographic Details
Published in:Anais da Academia Brasileira de Ciências 2016-03, Vol.88 (1), p.249-267
Main Authors: Donadel, Letícia, Cardoso, Luciana de S, Torgan, Lezilda C
Format: Article
Language:English
Subjects:
Biomass
Brazil
laguna costeira
microalgas
MULTIDISCIPLINARY SCIENCES
Plankton - classification
Plankton - physiology
Population Density
Population Dynamics
Seasons
sul do Brasil
sítio Ramsar
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Summary: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.
ISSN:0001-3765
1678-2690
1678-2690
DOI:10.1590/0001-3765201520150022