Ecology and Distribution Nitrobacter

the aquatic nitrogen cycle. conversion of nitrite nitrate facilitated species in genera nitrobacter , nitrospira.

the genus nitrobacter distributed in both aquatic , terrestrial environments. nitrifying bacteria have optimum growth between 25 , 30 °c, , cannot survive past upper limit of 49 °c or lower limit of 0 °c. limits distribution though can found in wide variety of habitats. cells in genus nitrobacter have optimum ph growth between 7.3 , 7.5, , die @ temperatures exceeding 120 °f (49 °c) or below 32 °f (0 °c). according grundmann, nitrobacter seem grow optimally @ 38 °c , @ ph of 7.9, holt states nitrobacter grow optimally @ 28 °c , within ph range of 5.8 8.5, although have ph optima between 7.6 , 7.8.

the primary ecological role of members of genus nitrobacter oxidize nitrite nitrate, primary source on inorganic nitrogen plants. members of genus nitrospira play important role nitrite oxidizers. role essential in aquaponics. since members in genus nitrobacter obligate aerobes, oxygen along phosphorus tend factors limit capability perform nitrogen fixation. 1 of major impacts of nitrosomonas , nitrobacter in both oceanic , terrestrial ecosystems on process of eutrophication.

the distribution , differences in nitrification rates across different species of nitrobacter may attributed differences in plasmids among species, data presented in schutt (1990) imply, habitat-specific plasmid dna induced adaptation of lakes investigated. follow-up study performed navarro et al. (1995) showed 60mda plasmid , 37 mda plasmid in freshwater , sediment isolates of nitrobacter populations . in conjunction schutts’ (1990) study, navarro et al. (1995) illustrated genomic features may play crucial roles in determining distribution , ecological impact of members of genus nitrobacter. nitrifying bacteria in general tend less abundant heterotrophic counterparts, oxidizing reactions perform have low energy yield , of energy production goes toward carbon-fixation rather growth , reproduction.