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- Title
THE EFFECT OF PHYSICO-CHEMICAL VARIATIONS ON PHYTOPLANKTON STATUS IN THE MARGIN OF CHOGHAKHOR WETLAND, IRAN.
- Authors
DEHGHANI, I.; PEYKANPOURFARD, P.; DANIALI, S. R.
- Abstract
Many human activities in the margin of Choghakhor wetland, (Iran) causes evaluation of the phytoplankton status in relation to the physico-chemical parameters in different seasons of 2011 in 5 marginal stations of the wetland. Water samples prepared in triplicate and temperature, pH, dissolved oxygen, nitrate and phosphate concentration were measured using APHA methods. The phytoplankton identified, counted and Shannon diversity index (Hʹ). Phytoplankton community included 59 genera, 43 families and 6 divisions, among which Bacillariophyta was the most common (46.6%) followed by Chlorophyta (32.0%), Cyanophyta (13.3%), Dinophyta (4.4%), Euglenophyta (3.0%) and Chrysophyta (0.8%). Phytoplankton density, nitrate, and phosphate concentration were different in different stations and seasons (P < 0.05). The highest density was recorded for Nitzschia followed by Cosmarium, Microcystis, Peridinium, Euglenaria and Dinobryon. Also, Microcystis density was maximum in station 5 [S5]. There were significant correlations between the phytoplankton density and nitrate concentration (r = 0.6, P < 0.01), Chlorophyta and phosphate concentration (r = 0.3, P < 0.01), Cyanophyta and phosphate concentration (r = 0.2, P < 0.05). Although wetland water was still clean (Hʹ > 3), high density of Nitzschia and Microcystis as eutrophication bio-indicators showed starting of eutrophication. Microcystis as the most abundant genus of Cyanophyta must be seriously controlled to avoid blooms in the wetland.
- Subjects
CHRYSOPHYCEAE; WETLANDS; DIATOMS; DINOFLAGELLATES; CHRYSOPHYTES; EUGLENOIDS
- Publication
Applied Ecology & Environmental Research, 2019, Vol 17, Issue 2, p5173
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1702_51735192