deletions | additions       diff --git a/Case studies.tex b/Case studies.tex  index 599c4e9..d93d595 100644  --- a/Case studies.tex  +++ b/Case studies.tex 
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North1 lake is a lowland eutrophic lake, located in a warm North-Temperate climate (mean Tº of 14ºC). Their primary production expressed in mg/m3 of chlorophyll is around 6.3-19.2. There are four seasons in a year, winter, spring, summer and autumn. In summer, the flow variations (Inflow and outflow fall to 3.5 from 25.2 and retention time increases to 100 days), the lack are lack or absence of seasonal wind and high temperatures (24ºC), causes the water column thermostratification. Stratification is expressed in generation of two layers. At the border of these layers, temperature changes dramatically (24ºC Surface to 20.6 in Planktonic layer, to 17.3 in Benthic layer). Water above and below of thermocline do not mix. The warmer water is near the surface and denser water is near the bottom. In winter, there is no ice covering in the surface. Opposite to the summer when the flow is minimum, in spring and autumn the water column overturns (Retention Time of 14 days and Zone Mixing of 100%), causing increases in conductivity.  In summer, depletions of oxygen at the three layers are more drastic than Artic lakes (below 8.7 mg/lt). Oxygen is directly correlated with the zone mixing, inflow and outflow, and inverse correlated with the others parameters (fig. **), especially with pH and retention time.  Limiting Nutrients in the form of nitrates, silicates and carbon dioxide are above of 90% 90 percent  available for phytoplankton in all layers. According with this availability, phytoplankton and periphyton biomass composition is dominated by planktonic (47%) (47)  and benthic (34.3%) (34.3)  diatoms. This way, 100% of zooplankton composition is reached by herbivorous zooplankton and fish community is dominated by benthic fish (67.6%). (67.6).  \subsection{North2 Lake} 
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Variables correlations are more seasonal than the N1. It means the period of summer is related with high retention time, higher pH and winter season with the higher levels of oxygen, inflow and outflow and oxygen. However, there is a more strong correlation of benthic and sediment Oxygen.  Limiting Nutrients like nitrates and carbon dioxide are around of 95% 95 percent  available for phytoplankton. Phosphates and Silicates show variations and minor percentage of availability. The former around of 80% 80 percent  and the second one around 95% 95  all year. Biomass composition is dominated by planktonic (46.7%) (46.7)  and benthic (41%) (41)  diatoms. Zooplankton composition is almost of herbivorous zooplankton (91.4%), but carnivorous zooplankton reaches a little percentage of 8.6%. 8.6.  The group of benthic invertebrates appears with the dominance of the detritivores (87.5%). (87.5).  Fish community is dominated by benthic fish again but in a high proportion (88.9%). (88.9).  \subsection{Tropical Lake}