A study on distribution of chlorophyll-a in the coastal waters of Anzali Port, south Caspian Sea
S. Jamshidi1,2 and N. Bin Abu Bakar11School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia 2Department of Physical Oceanography, Iranian National Institute for Oceanography, Tehran, 1411813389, Iran
Received: 23 Dec 2010 – Accepted for review: 11 Feb 2011 – Discussion started: 28 Feb 2011
Abstract. Phytoplankton as chlorophyll-containing organisms is the first step of production in most marine processes and food chains. Nutrient enhancement in the seawater due to the discharge of agricultural, industrial, and urban wastes threatens the Caspian Sea environment. Increasing concentrations of chlorophyll-a in seawater, in reaction to the elevation of nutrient supply can have severely damaging effects on the marine environment of the Caspian. In this research, seasonal variability of the chlorophyll-a concentrations in the western part of the southern coastal waters of the Caspian Sea near Iranian coast was examined using field observations. The data showed that the most chlorophyll-a was found below the sea surface. The thermal stratification in water column and outflow of the Anzali Lagoon affect the chlorophyll-a concentrations in the region. Concentrations of chlorophyll-a were recorded in midsummer in a range of 0.2–3.4 mg m−3.
Jamshidi, S. and Bin Abu Bakar, N.: A study on distribution of chlorophyll-a in the coastal waters of Anzali Port, south Caspian Sea, Ocean Sci. Discuss., 8, 435-451, doi:10.5194/osd-8-435-2011, 2011.