In early August 2012, air temperatures declined and hypolimnion temperatures converged with those of the epilimnion
, eliminating the thermal stratification that had inhibited mixing between the upper and lower zones of the lake (Fig.
During mixing events in 2015 and 2016, there was a decrease in pH in the epilimnion
. Specific conductivity fluctuated between 116 and 190 [micro]Si/cm, with lower values in the epilimnion
, and a clear chemocline at 20 m depth, which however became deeper with time ([F.sub.1,21] = 30.8; p = 0.00002).
Therefore in the hypothetical scenario presented here, the DBL thickness was estimated to be 0.26 [+ or -] 0.05 mm, covering a wide range of flow regimes, from fast flowing water to slow moving lake epilimnion
Because most phytoplankton taxa have a higher specific mass than water, all nonmotile and negatively buoyant taxa tend to sink out of the epilimnion
with time .
For example, dissolved oxygen levels ranged from 0.63 mg [L.sup.-1] (in the hypolimnion) to 9.20 mg [L.sup.-1] (in the epilimnion
), but over the season from 3.09 to 7.03 mg [L.sup.-1].
In this way,great variation in their diversity is observed, according to the trophic status, seasonality (BUOSI et al., 2011; GOMES; GODINHO, 2003; PAULETO et al., 2009), or even among compartments of the same environment, such as epilimnion
and hipolimnion (FINLAY; ESTEBAN, 1998; ZINGEL; OTT, 2000).
Water samples were taken from the epilimnion
and hypolimnion in the deepest portion of the lake using a Kemmerer sampler (Clean Lakes Program 2001; EPA 2007).
The TP concentration in the epilimnion
and metalimnion varies from 15 to 20 ([micro]g [L.sup.-1], while the total nitrogen (TN) content is about 500 ([micro]g [L-.sup.1].
The results of this study will provide information on the physico--chemical parameters of the lake at the epilimnion
Its amplitude of water temperature was recorded about 10[degrees]C, difference between epilimnion
and hypolimnion layers during thermocline, while it decreased to about 6.5[degrees]C in the SAD and TAD.
El viento sobre la superficie de un lago genera turbulencia en la capa de mezcla, turbulencia que rapidamente transfiere momento al agua, hasta el epilimnion
. Si el esfuerzo de viento se mantiene constante durante un determinado tiempo, el agua se mueve como un todo manifestandose un seiche.