Abstract
During 1970-2001, several ecological changes were documented in the Lake Kinneret Ecosystem: Decline of total Nitrogen (TN) and increase of total Phosphorus (TP) loads with a corresponding decline of TN/TP ratio. The phytoplankton assemblages indicated consequence Increase of Cyanobacteria accompanied by elevation of the biomass of Chlorophyta and Diatoms. The Kinneret ecosystem functioning represented two superimposed events: the decline of TN enhanced Cyanobacteria and elevation of TP that was reflected by an increase of Chloropytes and Diatoms. Removal of Nitrogen was achieved but P load remained high enough to enhance Chlorophyta and Diatoms. Consequently, a top priority of future management perspective should be reduction of Phosphorus inputs.
Highlights
The first record of bloom of the toxic—Nitrogen Fixer Cyanobacterium, Aphanizomenon ovalisporum occur during the summer of 1994
During 1970-2001, several ecological changes were documented in the Lake Kinneret Ecosystem: Decline of total Nitrogen (TN) and increase of total Phosphorus (TP) loads with a corresponding decline of TN/TP ratio
My message was short: nutrient loads in Lake Kinneret indicated a reduction of Nitrogen and a slight increase of Phosphorus resulting in the decline of N/P mass
Summary
The first record of bloom of the toxic—Nitrogen Fixer Cyanobacterium, Aphanizomenon ovalisporum occur during the summer of 1994. This bloom event followed the disappearance of the annual regular Winter-Spring-early-Summer bloom forming dinoflagellate Peridinium gatunenze [1]. During the summer of 1987, I was on Sabbatical leave at the Biological Station, University of Oklahoma. A colleague gave me a lift to the D/FW International Airport to get on a flight to NZ SIL Congress. It gave me about a short time to tell him about my study. My message was short: nutrient loads in Lake Kinneret indicated a reduction of Nitrogen and a slight increase of Phosphorus resulting in the decline of N/P mass
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