2 research outputs found
Seasonal variations of nitrate reducing and denitrifying bacteria utilizing hexadecane in Mandovi estuary, Goa, West Coast of India
587-592Mandovi estuary has a prolific population of
heterotrophic bacteria due to the influx of nutrients including nitrate and
organic hydrocarbons. Seasonal sampling at various locations along the estuary
was carried out to isolate nitrate reducing and denitrifying bacteria capable
of hexadecane utilization. Total viable counts of nitrate utilizing bacteria
showed variations with seasonal changes. It ranged from 103-106
cfu/mL on nitrate reduction medium and 101-105
cfu/ml on minimal media containing hexadecane as the sole carbon source.
Highest bacterial counts were obtained during the monsoons. 22% of bacteria
capable of hexadecane utilization were nitrate reducing and 12% were
denitrifying. 29% of the hexadecane utilizing cultures isolated during the
monsoons exhibited nitrate reducing activity. However, seasonal variations did
not affect the frequency of the denitrifying hexadecane utilizers