Teixeira de Oliveira M, Rocha O, Peret A C
Departamento de Botânica e Ecologia, Instituto de Biociências, UFMT, Cuiabá, MT, Brazil.
Braz J Biol. 2011 Aug;71(3):587-600. doi: 10.1590/s1519-69842011000400003.
The limnological features and the phytoplankton community of the Cachoeira Dourada reservoir were analyzed in December 2006, May 2007 and November 2007. Temporal changes in the taxonomic composition, density, diversity and dominance of species were analyzed in relation to climatic factors and the physical and chemical characteristics of the water. A positive correlation was found between some of the physical and chemical variables and the phytoplankton community. According to the CCA, variables such as the extent of the euphotic zone, temperature, pH, nitrogen and phosphorus concentrations directly affected the phytoplankton dynamics. Organisms belonging to the class Cyanophyceae were the most representative in all the sampling periods, comprising the functional groups K, S1, M and H. Hydrodynamics and seasonal fluctuations of environmental factors were the driving forces determining the composition and abundance of the algal assemblages. Despite the prevalence of Cyanobacteria, the reservoir is still oligotrophic. The absence of blooms and the relatively low population abundances indicated that the quality of the reservoir's water still lies within the limits required for its multiples uses.
2006年12月、2007年5月和2007年11月对多拉达瀑布水库的湖沼学特征和浮游植物群落进行了分析。分析了物种的分类组成、密度、多样性和优势度的时间变化与气候因素以及水体理化特征的关系。发现一些理化变量与浮游植物群落之间存在正相关。根据典范对应分析（CCA），真光层范围、温度、pH值、氮和磷浓度等变量直接影响浮游植物动态。蓝藻纲的生物在所有采样期都是最具代表性的，包括功能群K、S1、M和H。水动力和环境因素的季节性波动是决定藻类组合组成和丰度的驱动力。尽管蓝藻普遍存在，但该水库仍然是贫营养的。没有水华以及相对较低的种群丰度表明，该水库的水质仍在其多种用途所需的限度内。
