TITLE:
Experimental Study of the Aphanizomenon ovalisporum Response to Nitrogen Fertilization in the Sub-Tropical Eu-Meso-Trophic Lake Kinneret (Israel)
AUTHORS:
Moshe Gophen
KEYWORDS:
Aphanizomenon, N-Fertilization, Limnological Conditions
JOURNAL NAME:
Open Journal of Ecology,
Vol.5 No.6,
June
3,
2015
ABSTRACT: First record of a bloom of filamentous-heterocystous nitrogen fixer
cyanobacterium, Aphanizomenon ovalisporum, was documented in the summer
of1994 inLake Kinneret (Israel). Awareness of such a bloom outbreak was predicted
earlier based on documentation of Nitrogen deficiency and Phosphorus
Sufficiency developed conditions. The concept of Nitrogen fertilization aimed
at suppression of Nitrogen fixers Cyanobacteria was worldwide discussed
and successfully implemented, but mostly in temperate oligotrophic lake ecosystems.
This paper presents an experimental testing of this concept by additional
Nitrogen. The results of the present study did not verify this hypothesis
probably related to the ecological differences between Kinneret and the
temperate ecosystems and using only one factor (Nitrogen) to test it.