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Published byFaith Carlson Modified over 11 years ago
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ROLE OF MICROBES IN ECOSYSTEMS
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DECOMPOSERS BREAKDOWN DEAD ORGANISMS RELEASES NUTRIENTS TO RE-ENTER ENVIRONMENT Nitrogen & carbon cycles
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NITROGEN GAS FIXERS CONVERT GASEOUS NITROGEN INTO NITRATE & NITRITE IONS AS PART OF THEIR METABOLISM RESULTING PRODUCTS GO INTO ENVIRONMENT
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PRODUCERS CONVERT RAW ENERGY TO ORGANIC MOLECULES & NUTRIENTS FOR THEMSELVES & OTHERS INCLUDES PHOTOSYNTHETIC BACTERIA; i.e. CYANOBACTERIA & CHEMOSYNTHETIC BACTERIA
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PLANTS & ANIMALS PLANTS GET NITROGEN IN THE FORM OF NITRATES AND THE AMMONIUM ION ANIMALS REQUIRE ORGANIC FORM OF NITROGEN IN AMINO ACIDS
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LIGHTENING FIXES NITROGEN GAS HIGH TEMPS CAUSE NO IONS TO FORM NO IS OXIDIZED OF OXYGEN GAS TO FORM NO2 WHICH REACTS WITH H2O TO FORM NO3 IONS
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ROOT NODULES BACTERIA IN NODULES OF LEGUMES FORM MUTUALIATIC RELATIONSHIPS WITH RHIZOBIUM BACTERIA N2(g) + O2(g) 2NO(g) 2NO (g) + O2(g) 2NO2(g) 3NO2(g) + H2O(l)2H+(aq) + 2NO3(aq) + NO(g)
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Haber process Commercial production of fertilizers Fertilizers use NH4NO3 + (NH4)SO4 CAUSES THE AMMONIUM ION TO BE PUT INTO THE SOIL
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NITRIFICATION PROCESS INVOLVES OXIDATION OF NITROGEN COMPOUNDS TO PRODUCE NITRATE IONS IN SOIL RETURN NITROGEN TO SOIL FROM FECES & DEAD ORGANISMS DECOMPOSERS CALLED NITROSOMONAS BREAKDOWN NITRATES IN RPOCESS OF DEAMINATION & RELEASE NH3
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NITROBACTER ARE NITRIFYING BACTERIA USE NH3 FOR ENERGY BY OXIDIZING NH3 TO NITRITE IONS NITROBACTER & NITRSOMONAS FUNCTION IN SOIL & WATER
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DENITRIFICATION BACTERIA IN OXYGEN POOR SOIL USE NITRATE IONS AS AN OXYGEN SOURCE NITROGEN AGS IS RELEASED AS WASTE PSEUDOMONAS DENITRIFICANS DO THIS 2NO3¯+ 10e¯+ 12H+ N2 + 6H2O
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