Table 4.
Comparison of F&T mechanisms and nutrient species coverage for marine eutrophication models.
[(+) or (−) refers to an increase or decrease, respectively, in concentration of associated species in the water column]
| Category | Characteristic | Model Name | |||||
|---|---|---|---|---|---|---|---|
| AQUATOX-Estuary | Cosme et al. | NCOM-CGEM | FVCOM-WQM | FVCOM-GEM | EFCD-WQM | ||
| Freshwater Nutrient Pools | Nitrogen | NH3, NO3, BN, DN, PON | DIN, BN, DN | NO3, NH4, BN, DN | NH3/NH4, NO3, DN, BN | NH4, NO3, NO2, DN | NH3/NH4, NO3, DON, DN, BN |
| Phosphorus | PO4, PIP, BP, DP, PON | - | PO4, BP, DP | PO4, BP, DP | PO4, DP | PO4, DP, DOP, BP, PIP | |
| Transport and Removal Mechanisms | Advection | N, P | DIN | N, P | N, P | N, P | N, P |
| Diffusion | N, P | - | N, P | N, P | N, P | N, P | |
| Biological Fixation | BN (+) | - | - | - | - | - | |
| Sediment Exchange | NO3 (+/−), NH3 (+/−), PO4 (+/−) |
- | NH4 (+), PO4 (+) | NO3 (+/−), NH3 (+/−), PO4 (+/−) |
NO3 (+/−), NH3 (+/−), PO4 (+/−) | NO3 (+/−), NH3 (+/−), PO4 (+/−) | |
| Active Vertical Transport | BN (+/−), BP (+/−) | BN (+/−) | - | BN, BP (+/−) | BN (+/−), BP (+/−) | - | |
| Settling | BN (−), BP (−), DN (−), DP (−) |
DN (−), BN (−) | DN (−), DP (−) | BN (−), BP (−), DN (−), DP (−) |
BN (−), BP (−), DN (−), DP (−) |
DP (−), DN (−), PIP (−), BN (−), BP (−) |
|
| Resuspension | DN (+), DP (+), PON (+), POP (+) | - | - | NH4 (+), NO3 (+), PO4 (+) | NH4 (+), NO3 (+), PO4 (+) | DON (+), DP (+), DN (+), PIP (+), BN (+), BP (+) | |
| Denitrification | NO3 (−) | DIN (−) | NO3 (−) | NO3 (−) | NO3 (−) | NO3 (−) | |
| Nutrient Cycling Processes (within grid cells) | Mineralization | NH3 (+), PO4 (+), DN (−), DP (−), BN (−), BP (−) | - | DN (−), DP (−), NH4 (+), PO4 (+) | NH4 (+), PO4 (+), DN (−), DP (−) | NH4 (+), PO4 (+), DN (−), DP (−) | DOP (−), PO4 (+), DON, (−), NH4 (+) |
| Nitrification | NO3 (+), NH3 (−), DO (−) | - | NH4 (−), NO3 (+), DO (−) | NO3 (+), NH4 (−) | NH4 (−), NO3 (+), DO (−) | NH4 (−), NO3 (+), DO (−) | |
| Dissolution/Hydrolysis | - | - | - | DN (−), DP (−) | DN (−), DP (−) | DN (−), DON (+), DP (−), DOP (+) | |
| Decomposition, microbial | DN (−), DP (−), NH3 (+), PO4 (+), DO (−) | DN (−) | - | DN (−), DP (−) | DN (−), DP (−) | - | |
| Mortality | BN (−), BP (−), DN (+), DP (+) | BN (−), DN (+) | BN (−), BP (−), DN (+), DP (+) | BN (−), BP (−), DN (+), DP (+) |
BN (−), BP (−), DN (+), DP (+) |
- | |
| Biological Uptake | NH3 (−), NO3 (−), PO4 (−), BN (+), BP (+), DO (+) | DIN (−), BN (+) | NH4 (−), NO3 (−), PO4 (−), BN (+), BP (+), DO (+) | NH4 (−), PO4 (−), NO3 (−), BN (+), BP (+), DO (+) | NH4 (−), PO4 (−), NO3 (−), BN (+), BP (+) | PO4 (−), NH4 (−), NO3 (−), BN (+), BP (+), DO (+) | |
| Predation/Ingestion | DN (−), DP (−), BN (+/−), BP (+/−) | BN (+/−) | BN (+/−), BP (+/−), DN (+), DP (+) | BN (+/−), BP (+/−), DN (+), DP (+) | BN (+/−), BP (+/−), DN (+), DP (+) | DOP (+), DP (+), PO4 (+), DON (+), DN (+), NH4 (+), BN (−), BP (−) | |
| Colonization | DN (−), DP (−), NH3 (+), PO4 (+) | - | - | - | - | - | |
| Adsorption | PIP (+), PO4 (−) | - | - | - | - | PO4 (−), PIP (+) | |
| Respiration/metabolism | NH3 (+), PO4 (+), BN (−), BP (−), DO (−) | DN (−) | NH4 (+), PO4 (+), BN (−), BP (−), DO (−) |
NH4 (+), PO4 (+), BN (−), BP (−), DO (−) | NH4 (+), PO4 (+), BN (−), BP (−) | DOP (+), POP (+), PO4 (+), DON (+), PON (+), NH4 (+), BN (−), BP (−), DO (−) |
|
| Excretion | NH3 (+), BN (−), BP (−), DN (+), DP (+), PO4 (+) | BN (−), DN (+) | NH4 (+), PO4 (+), DN (+), DP (+) | - | - | DOP (+), POP (+), PO4 (+), DON (+), PON (+), NH4 (+), BN (−), BP (−) |
|
| Reaeration | DO (+) | - | DO (+) | DO (+) | - | DO (+) | |
| Sediment Demand | DO (−) | DO (−) | DO (−) | DO (−) | - | DO (−) | |
1
P - phosphorus, N - nitrogen, DON - dissolved organic nitrogen, ON - organic nitrogen, OP - organic phosphorus, DIP - dissolved inorganic phosphorus, DOP - dissolved organic phosphorus, POP - particulate organic phosphorus, PON - particulate organic nitrogen, NO3 - nitrate, NH4 - ammonium, NH3 - ammonia, PO4 - phosphate, BN - biological nitrogen, BP - biological P, OM - organic matter, DN - detrital N, DP -detrital P, PIP - particulate inorganic phosphorus