Ammonia

Nitrite

Nitrate

Molecular nitrogen

DON-NR

DON-R

PON

Nitrification #1

Nitrification #2

Denitrification

Phyto

Decomposition.

PONMineraliz.

DON Mineraliz.

Zoo

Higher Trophic Levels

Respiration& Excretion

Mortality & Excretion

Non-assimilated

Respiration& Excretion

Predation

Zoo - Copepod

Ammonia

Nitrite

Nitrate

Molecular nitrogen

DON-NR

DON-R

PON

Nitrification #1

Nitrification #2

Denitrification

Phyto

Decomposition.

PONMineraliz.

DON Mineraliz.

Zoo

Higher Trophic Levels

Respiration& Excretion

Mortality & Excretion

Non-assimilated

Respiration& Excretion

Bacteria Protozoa

Uptake

Predation

Release

Predation

Zoo - Copepod

Protozoa - Ciliate

N

N

N

N

N

N

N

C C

CC

NNCC XX .

Ammonia

PON

Phyto

N

N

C

•Razão C:N:P fixa - 106:16:1 (RedField)•Modelação do carbono implícita

XPredadores

NH4 ; PO4CO2

DOM POM

Alimento

C:N:P

mortalidade

predação

excreção de nutrientes

respiração

“slopy feeding”,etc.

uptake

Organismo “standard”

PO4

SiO4

CO2

NH4

NO3

DOP

DOCDON

[O2][O2]

YXCXXXX

C GXemrt

X

).(

.........t

Pc

.........t

Pn

........

t

Pp

BACTERIA

C N P

DOM

C N P

DOM(semi-labile) C N P

POM

C N P M

H

H

UL

Grazing

Hydrolysis

Lysis

Mortality

Respiration

Uptake

R

O2 O

CO2 CO

UR

NH4 N

PO4 PR

Microzooplankton

C N P

G

Phytoplankton

C N P

O

CO

Multi-element model

Vantagens desta abordagem:

1. Desacoplar o uptake de cada nutriente

2. Razões C:N:P variáveis

3. Considerar o armazenamento de nutrientes

Nutrientes (P)

Fitoplâncton

Matéria orgânica

Bactérias

O2 CO2

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