As phytoplankton are at the base of the food chain, changes at this level of the marine ecosystem can affect the different parts of the food web that depend on this source of food and energy. Some phytoplankton species can have harmful affects on the marine ecosystem.For example, they can produce natural biological poisons (biotoxins) that can result in closures of areas where shellfish such as scallops are caught by fishermen, or can kill animals that live on the sea bed or fish grown in fish farms.s phytoplankton are at the base of the food chain, changes at this level of the marine ecosystem can affect the different parts of the food web that depend on this source of food and energy. Some phytoplankton species can have harmful affects on the marine ecosystem.
A trickling filter is a type of wastewater treatment system first used by Dibden and Clowes It consists of a fixed bed of rocks, lava, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of ...
Teeming and Lading By DETECTIVE-SERGEANT J. MITCHELL Metropolitan and City Police Company Fraud Department TEEMING and lading is the name given to a system of fraudulent manipulation of accounts. Accountants define it as  the use of to-day'scash remittances to make up the amount which should have been paid in yesterday.