Isotopic Investigations of Pollution Transport in Shallow Marine Environments off the Karachi Coast, Pakistan

摘要

The pollution scenario of shallow marine environments off the Karachi coast, Pakistan, is established through determination of stable carbon isotope ratios (delta~(13)C) of total dissolved inorganic carbon, marine plants (mangroves and seaweed), stable isotope composition of nitrogen (delta~(15)N) in mangroves and seaweed, toxic/trace metal concentration and gross gamma activity in sea bottom sediments, total coliform bacterial population, electrical conductivity, and turbidity in polluted water sources (Layari and Malir River mouth areas), non-polluted Karachi sea water and pollution recipients (Manora Channel, southeast coast and northwest coast of Karachi).