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Ammonia

Respiration & Excretion. Ammonia. Nitrification #1. Higher Trophic Levels. Nitrite. Phyto. Zoo. Nitrification #2. Nitrate. PON Mineraliz. Denitrification. Predation. Molecular nitrogen. DON Mineraliz. PON. Mortality & Excretion. Zoo - Copepod. Non-assimil ated. Decomposition.

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Ammonia

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  1. Respiration & Excretion Ammonia Nitrification #1 Higher Trophic Levels Nitrite Phyto Zoo Nitrification #2 Nitrate PON Mineraliz. Denitrification Predation Molecular nitrogen DON Mineraliz. PON Mortality & Excretion Zoo - Copepod Non-assimilated Decomposition. DON-R Respiration & Excretion DON-NR

  2. Respiration & Excretion N Ammonia Nitrification #1 Higher Trophic Levels C C Nitrite N Phyto Zoo Nitrification #2 N Nitrate PON Mineraliz. Denitrification Predation Molecular nitrogen N DON Mineraliz. N PON Mortality & Excretion Zoo - Copepod Protozoa - Ciliate Non-assimilated Decomposition. N DON-R Respiration & Excretion N DON-NR Uptake Release C C Bacteria Protozoa Predation

  3. N Ammonia C Phyto N PON • Razão C:N:P fixa - 106:16:1 (RedField) • Modelação do carbono implícita

  4. Organismo “standard” CO2 NH4 ; PO4 respiração excreção de nutrientes X Alimento uptake Predadores C:N:P predação “slopy feeding”,etc. mortalidade DOM POM

  5. NH4 CO2 SiO4 NO3 PO4 [O2] [O2] DOC DON DOP

  6. O2 Phytoplankton O C N P NH4 CO2 N O C O Microzooplankton R PO4 P C N P O C R U G BACTERIA POM C N P R C N P M DOM U C N P L H H DOM (semi- labile) C N P Multi-element model Grazing Hydrolysis Lysis Mortality Respiration Uptake

  7. Vantagens desta abordagem: • Desacoplar o uptake de cada nutriente • Razões C:N:P variáveis • Considerar o armazenamento de nutrientes

  8. Nutrientes (P) Descargas Fitoplâncton Descargas Matéria orgânica O2 CO2 Bactérias

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