This study was achieved through Mars 2011 until February 2012 the samples collected monthly from Baksa dam from different four location which differenced each other with chemical and physical qualities.
We could in these study classified 132 speci
es of phytoplankton distributed as 59 species belong to chrysophyta, 40 species of chlorophyta and 28 species of cyanophyta , 5 species of Euglenophyta.
Physical and chemicalanalyzing ofBaksa waters showed the difference of values between studding regions, The concentration of Nitrate ions ranged between 17.7 mg/l at third location and 0.3 mg/l at second location, The highest rate to Phosphate ions was 18.8 mg/l and the less was 0.01mg/l, and it was noticed the difference in these values in the same region with the difference of period of time.
The diversity and distribution of studied phytoplankton correlated with the environmental factors.
It was noticed The abundance of cyanophytain the water of third location which near to the sewage channels which is suitable environment to these group of phytoplankton.
In this study we isolated chlorella vulgaris alage from some water
areas , and test effect some conditions (light intensity,Nitrat and
phosphate concentrations ,solution soil) on its Growth Range and
Duplicated time the cells.
This study was carried out during the period 2011–2010 for 12 months. 110 species
of phytoplankton in Al-Kabir Al-Shamali River were identified including 4 species of
Euglenophyta, 15 species of Cyanophyta, 49 species of Chrysophyta, 40 species of
Chlorophyta and 2 species of Pyrrophyta.
Some physicochemical parameters of water were determined. Some of them were the
temperature which ranged between 10.8–28°C, the pH 7.76–8.2 and the BOD 1.6–10mg/l,
while the concentrations of NO3
- ranged between 1.10-250 mg/l, nitrate 0.13-0.01mg/l, and
PO4
- ions 0.015–1.05 mg/l. The highest value of ammonium ions was 6.25mg/l and the
lowest was 0.011 mg/l. BOD concentrations ranged between 6.06-12.07mg/l.
The effect of different concentrations of nitrate and phosphate and soil extract on the
total growth and chemical composition to the green algae Chorella vulgaris isolated from
some localaquatic habitats had studied in this research, at three type
of temperature (30 ,
25, 20), the maximum total growth reached up to 4.66 Cell/h and the lowest duplicated
time was 1.55 h at temperature 25ºC and at concentration of nitrate 1 g/L , 0.05 g/L of
phosphate, and 10/100 mL of soil solution , while the number of cells reached to 59423,61
cell/mL at the day 22 of cultivation.
The chemical composition differed by the changing of temperature and nutrient
medium composition , while the maximum protein content reached to 48.36 % at the
maximum concentration of nutrients and 25 ºC of temperature , the maximal concentration
of lipid was 19,78 % at temperature 25ºC and concentration of nitrate 0.1 g/L and 0.01 of
phosphate and 6/100 mL of soil solution , the concentration of carbohydrates were the
lowest where the maximal ratio was 17.41 % at temperature 20ºC .
The effect of different concentrations of phosphate and nitrate and soil extracted on
the isolated growth isolation of Scendesmus acutus which is isolated from some local
aquatic areas has tested in this research, the number of cells and growth ran
ge and
duplicated time of all algal cultures among thirty five days has counted.
The highest growth range was 3.90 by using a mixture of the three solutions in
concentrations (1g/l nitrate + 0.05g/l phosphate + 10 ml / 100 of soil solution), the numbers
of cells reached to 8861.11 in the twenty fourth day of culture, and in the lowest duplicated
time 10.85, whereas the highest growth range was by using soil solution alone 2.86 and the
lowest duplicated time 2.13 at concentration 16/100ml, whereas the growth range
decreased and duplicated time increased by using nitrate and phosphate solution all by its
own, while the highest growth range reached to 2.13 and 1.76 and lowest duplicated time
3.39 and 4.11 in order.
