Sampled lakes were from mesotrophic
to hypereutrophic systems (Wu et al., 2005).
Farther south in classic mesotrophic
lakes water is darker.
Both lakes are spring-fed, relatively small and shallow, and mesotrophic
(Florence: Latitude 45.123[degrees]N, 88.890[degrees]W, 21.4 ha surface area, 7.6 m maximum depth, elevation 381 m; water clarity trophic state index = 45 [Carlson, 1977]; Upper Bass: 45.111[degrees]N, 88.879[degrees]W, 49.8 ha, 15.5 m, 380 m; trophic status index = 42).
Among their topics are innovations in the system of accelerated propagation of potato minitubors, cultivating the Arctic raspberry on mesotrophic
bogs: phytocenotic study in various ecological conditions, evaluating salt-resistant flowering plants in simulated conditions, the productivity of apple orchards on terraced and gentle slopes, and hazelnut (Corylus domestica Kos.
It is impossible to use the eutrophic and mesotrophic
raw-humic covers for crop cultivation without artificial drainage.
Two sites with a homogeneous vegetation structure were selected that consisted of (1) a sparsely vegetated, dry grassland (Corynephoretum: nutrient-poor grassland on inland dunes; coverage of herbaceous plants [CH] = 20%, height of herbaceous plants [HH] = 15 cm), and (2) a densely vegetated grassland site (Lolio-Cynosuretum: mesotrophic
grasslands; CH = 100%, HH =50-60 cm).
Consequently, the Panama Basin is defined by three areas; northern eutrophic (between 8[degrees]-5.5[degrees]N), mesotrophic
(between ~5.5 y 2[degrees]N) and southern eutrophic (to the south of 2[degrees]N) (Betancur & Martinez, 2003).
Larvae then move from mesotrophic
metabolism to strict exogenous feeding on microalgae (Haws et al.
(2015) for characterizing the productivity level in terms of CHL concentrations (mg [m.sup.-3]) within the study area: oligotrophic waters (<0.084), lower mesotrophic
waters (0.084-0.23), medium mesotrophic
waters (0.23-0.46), upper mesotrophic
waters (0.46-0.793) and eutrophic waters (>0.793).
The species occurs in nearly all types of natural freshwater habitats, including ponds, rivers, lakes and streams, mainly in mesotrophic
to eutrophic environments (Jankowski et al., 2008).
Predation can be responsible for the breakdown of bacterioplankton blooms and the temporal changes in phytoplankton structure in a mesotrophic
lake (Hennes and Simon, 1995).
Chl-a concentrations at most stations were categorized as oligotrophic status except those at stations 8, 9, and 10 (mesotrophic
status) and station 1 (eutrophic status) in the present study (Table 2).