Check the status of trophy by comparing indicators of physical, chemical and biological (Case Study coast port city of Anzali)

Check the status of trophy by comparing indicators of physical, chemical and biological (Case Study coast port city of Anzali)

Authors

  • Zahra Eizadkhasti Department of Marine Biology, Faculty of Natural Resources , Tarbiat Moddares University, Iran, Islamic Republic of
  • Abbas Esmaili Sari Department of Environment, Faculty of Natural Resources , Tarbiat Moddares University, Iran, Islamic Republic of
  • Maryam Fallahi Kapourchal National Inland Water Aquaculture Institute, Iran, Islamic Republic of
  • Mohammad Javad Amiri Department of Environmental Education, Management and Planning , Faculty of Environment, University of Tehran, Iran, Islamic Republic of
  • Shaho Karami Department of Environmental Planning, Payame Noor University, Iran, Islamic Republic of

Abstract

To compare physical, chemical and biological indices of primary productions on the coast of Bandar-e Anzali, water column in the depths of 2, 5 and 10 meters was sampled. The physical index of primary productions by using the Secchi disc Was calculated, chemical index by measuring the density of nutrients in water and biological index by determining the density of Chlorophyll a in phytoplankton’s were calculated. The maximum clearance was 300 centimeters in spring and the average maximum density of total Phosphorus and total Nitrogen in water column was in spring and respectively 0.061 and 0.831 milligram per Liter (p<0.05). The maximum density of Chlorophyll a was in summer, 6.4 microgram per cubic meter. The results show that among these indices, it is better to use physical and biological indices. Both indices statistically have reversed correlation (p<0.05). Through comparison of information with qualitative water class tables, water of Caspian Sea can be located in Mesotroph water class from the density of Chlorophyll a point of view according to the amount of summer vision depth by Secchi disc and at the beginning of Eutroph water class from the point of view of total Phosphorus and total Nitrogen (p<0.05).

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Published

2014-08-20

Issue

Vol. 6 No. 3 (2014)

Section

Articles

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