With regard to the Miosotis stream: source--bad-smelling water; no riparian vegetation; surroundings with extensive pollution--and downstream--reddish water; site with small quantities of garbage; extensive erosion; presence of pigs, no bad smell, riparian vegetation extant.
Current study evaluated the cytotoxic effects of water from streams Mandacaru, Maringa, Miosotis and Nazareth located in urban area of Maringa, Parana State, Brazil.
Groups--Control: Control 1 (CO1), Control 2 (CO2), Control 3 (CO3), and Treatment: Mandacaru Source Site (MSS) and Downstream Site (MDS); Maringa Source Site (MAS) and Downstream Site (MAD); Miosotis Source Site (MIS) and Downstream Site (MID); Nazareth Source Site (NSS) and Downstream Site (NDS).
Although statistical analysis did not show significant results with regard to the cytotoxic potential of water in the streams studied, it is worth noting that there are differences in the percentage between the mitotic indexes of treatments (Tr = 24h) with the source waters of streams Mandacaru, Maringa and Miosotis and their respective negative controls (Tr = 24h).
the waters of streams Mandacaru, Maringa, Miosotis and Nazareth met the CONAMA's conditions for freshwater quality.
Excepting samples from the stream Maringa's source and downstream sites, the other samples in current study (source and downstream sites of streams Mandacaru, Miosotis and Nazareth) were collected during the rainy season in January, with an average rainfall of 145.
10;88]), water from streams Agua da Roseira and Agua do Pirapo and sediment from streams Agua da Roseira, Miosotis and Agua do Pirapo, have been significantly higher than the reference location (Figure 3).
It showed that the water of streams Agua Quecaba, Mandacaru, Miosotis and Nazare, and sediment from streams Remo, Zauna, Miosotis and Agua do Pirapo were not statistically different from the reference location; the others were significantly greater in relation to the reference location (Figure 5).
05 has indicated that, for PCA 1, the streams Agua do Pirapo, Mandacaru, Miosotis and Zauna have negatively differed from the reference location, with higher pH, total nitrogen and dry/fresh biomass ratio.
Although the stream Agua da Roseira had presented the highest concentration of total phosphorus, this stream along with Mandacaru, Miosotis and Agua do Pirapo streams, have presented mean RGR significantly lower than the reference location, for both water and sediment; these streams had higher concentration of total nitrogen and higher pH.
Considering the biomass index, the sediment from Miosotis Stream, water and sediment from Agua da Roseira and Agua do Pirapo streams presented mean values significantly higher than the reference location.
In relation to the damage frequency, water from four out of the ten streams studied (Agua Quecaba, Mandacaru, Miosotis and Nazare), and sediment of four out of the ten streams (Remo, Zauna, Miosotis and Agua do Pirapo) have not differed from the reference location.