Presentation by Lisa Schneider (Deltares, Netherlands), at the Delft3D User Days, during Delft Software Days - Edition 2022. Tuesday, 15 November 2022.
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DSD-INT 2022 PROTIST - a new primary production module for D-Water Quality - Schneider
1. Lisa K. Schneider, Lora Buckman, Nathalie Gypens, Michelle Jeuken, Maarten Klapwijk,
Arjen Markus, Tineke A. Troost, Lauriane Vilmin, Luca van Duren, Willem Stolte
Modelling phytoplankton, mixoplankton &
protozooplankton
PROTIST - a new primary
production module for
D-Water Quality
4. introduction
:
PROTIST
:
application
:
conclusion
These two primary production modules differ in their
mathematical principles applied.
4
DYNAMO BLOOM
Monod kinetics Linear programming
Small time step
→ Turbulent
systems
Species competition
Simple
→ Too simple
24 h time step
→ Difficult in
turbulent
systems
→ Difficult in
species
ecosystem
interaction
5. introduction
:
PROTIST
:
application
:
conclusion
Hot topic in coastal zone management is the combination
of offshore wind farms with different forms of aquaculture.
5
+
Integrated multi-trophic
aquaculture (IMTA)
Primary production module requirements: Small time step
→ Interspecies competition
→ Turbulent systems
Multiple species
Offshore wind farms
Planktonic primary production
+
7. introduction
:
PROTIST
:
application
:
conclusion
7
PROTIST is a primary production module for DELWAQ
that models the complete protist community.
PROTIST
5 protist functional types simultaneously
Schneider et al.
(2021) Modelling
mixoplankton along
the biogeochemical
gradient of the
Southern North Sea.
Ecological Modelling,
459.
ligh
t
NO3
- NH4
+
CO2,NH4
+,DIP
DIP
DO
M
PO
M
CO2
pre
y
SAPPM
1 protist functional type at a time
Flynn (2021) Enhancing Microalgal Production
- constructing decision support tools using
system dynamics modelling. Zenodo.
http://doi.org/10.5281/zenodo.5036605
9. introduction
:
PROTIST
:
application
:
conclusion
9
Mixoplankton can be distinguished into four different
types.
9
Constitutive
Mixoplankton
CM
Non-Constitutive
Mixoplankton
NCM
Innate chloroplasts Must aquire photosynthetic capabilities from prey
General
GNCM
plastid Specialist
pSNCM
endosymbiotic
Specialist
eSNCM
e.g. Alexandrium e.g. certain ciliates e.g. Dinophysis Noctiluca
scintillans
24. introduction
:
PROTIST
:
application
:
conclusion
24
Both sugar kelp as well as the protist community require
access to the dissolved inorganic nutrient pool.
→ Uptakes inorganic nutrients during winter
→ Harvested during summer
→ Competes for dissolved inorganic nutrients
Does the intensification of kelp aquaculture affect the
composition of planktonic protist communities?
25. introduction
:
PROTIST
:
application
:
conclusion
25
We set up a 3D ecological model of the North Sea and ran
two different scenarios.
Zijl, F. et al. (2018). The 3D Dutch Continental Shelf Model – Flexible Mesh (3D DCSM-FM). Deltares rapporte 1220339-000.
PROTIST
Dutch Continental Shelf Model
– Flexible Mesh (DCSM-FM)
D-Water Quality (DELWAQ)
Deltares (2022). D-Water Quality user manual. https://content.oss.deltares.nl/delft3d/manuals/D-Water_Quality_User_Manual.pdf
27. introduction
:
PROTIST
:
application
:
conclusion
27
In the seaweed scenario, seaweed was seeded in 25 % of
the area of each offshore wind farm.
Modified from Vilmin and Van Duren (2021) Modelling seaweed cultivation on the Dutch continental shelf. Deltares report (https://www.deltares.nl/en/publications/)
31. introduction
:
PROTIST
:
application
:
conclusion
31
From the 3D model results, it can tentatively be concluded
that
Seaweed aquaculture in the SNS could lead
→ Decrease in DIN and DIP concentrations
Could lead to a
→ Increase of CM biomass
→ Increase of diatom biomass
→ Change in trophic composition of protist
communities
Reference
scenario
Seaweed
scenario
Diatom
Green
algae
Protozoo-
plankton
CM
Seaweed -