Brazilian Archives of Biology and Technology | |
The influence of hydrodynamics on the spatial and temporal variation of phytoplankton pigments in a large, sub-tropical coastal lake (Brazil) | |
Luciana De Souza Cardoso1  David Da Motta Marques1  | |
[1] ,Universidade Federal do Rio Grande do Sul Instituto de Pesquisas Hidráulicas Porto Alegre RS ,Brazil | |
关键词: Pigment; phytoplankton; shallow lake; hydrodynamics; wind; bloom; pigmento; fitoplâncton; lagoa rasa; hidrodinâmica; vento; floração; | |
DOI : 10.1590/S1516-89132004000400013 | |
来源: SciELO | |
【 摘 要 】
This study evaluated the spatial and temporal distribution of phytoplankton pigments in Itapeva Lake and its relationship with hydrodynamic aspects. Regarding spatial distribution, a decreasing N®S gradient was generally observed for the pigments, except in summer. This inversion observed during the summer was influenced by the predominant fetch (N-E). The horizontal heterogeneity was proved (ANOVA) for all seasons of the year, except spring. Spatially in spring, the vertical variance was much more significant (p<0.05) than the horizontal one. The sampling shifts presented a permanent degree of variability among the seasons of the year, showing the existence of a diurnal cycle in the concentration of chlorophyll a. This behavior was related to the fetch, mainly from the NE and SW quadrants, disturbing the system because it is a shallow lake. This confirmed the influence of the Itapeva Lake's hydrodynamic regime on the spatial-temporal distribution of the phytoplankton pigments.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
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RO202005130165202ZK.pdf | 216KB | download |