N. B. Mruthyunjaya, M. Venkateshwarlu & B. R. Kiran, “PRIMARY PRODUCTIVITY STATUS IN AYYANAKERE LAKE, CHIKMAGALORE DISTRICT, KARNATAKA”, International Journal of Multidisciplinary Research and Modern Education (IJMRME), Volume 2, Issue 2, Page Number 29-33, 2016

The present study is intended to know the status of primary productivity of freshwater Lake Ayyanakere, Karnataka. Primary productivity is determined by using standard ‘Light and Dark bottle’ method of Garden and Gran at an interval of every month for a period of one year from April 2008 to March 2009. Gross primary production in Ayyanakere recorded as 4.572 gC/m3/day, 9.1464 gC/m3/day and 6.4056 gC/m3/day. In the present study,GPP, NPP and CR was maximum in monsoon season and lowest in pre-monsoon season. The lowest yield was observed in pre-monsoon season when it was 4.572 gC/m3/day it is due to the decrease in the water level. The higher production was observed in monsoon due to high phytoplankton content.

Key Words:
Primary Productivity, Ayyanakere Lake, Seasons & Water Quality

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