Upscaling the impact of coastal hypoxia from species to ecosystem function. Bioturbation on the Black Sea Shelf.

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Upscaling the impact of coastal hypoxia from

species to ecosystem function.

Bioturbation on the Black Sea Shelf.

Arthur Capet,Fatima Anrade Pena, Audrey Plante, Adrian Teca, Lei

Chou, Nathalie Fagel, Marilaure Grégoire

MAST-FOCUS, Liège University, Liège, Belgium

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Question & Approach

Coastal hypoxia

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Question & Approach

Macrobenthos

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Habitat

Environmental Conditions (eg. T°, light, orgC, [O

2 ] ) shape populations

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Functions

Services

Providing food, shelter

Regulating erosion, eutrophication, carbon burial

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Functions

Impact on biogeochemical cycling

Bioturbation

Bioirrigation

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Traits

Modalities of behavior :

Mobility

Feeding type

Breitburg et al, 2018

Soetart et al, 2000

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Question & Approach

Meta-Modelling

Involve different models at different process scales

I

Focus model: Diagenetic model, 1D, 50cm of sediments

I

General model: Biogeochemical model, 500km the Black Sea

Meta-Modelling: To mimic the Focus model in the General Model

Breitburg et al, 2018

Soetart et al, 2000

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Results

Trait Mapping

1 Question & Approach

2 Results

Trait Mapping

Diagenetic Modelling

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Results

Trait Mapping

Queiros et al, 2015

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Results

Trait Mapping

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Results

Trait Mapping

Queiros et al, 2015

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Results

Trait Mapping

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Results

Trait Mapping

Queiros et al, 2015

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Results

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Results

Trait Mapping

Queiros et al, 2015

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Results

Trait Mapping

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Results

Trait Mapping

Queiros et al, 2015

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Results

Trait Mapping

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Results

Trait Mapping

Bioturbation Community Potential (BP

c

)

BP

c

=

n species

X

i =1

p

Biomass

i

.Mobility

i

.Reworking

i

Solan et al, 2004

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Results

Diagenetic Modelling

1 Question & Approach

2 Results

Trait Mapping

Diagenetic Modelling

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Results

Diagenetic Modelling

Capet et al, 2016

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Results

Diagenetic Modelling

Denitrication ratio as a function of:

Benthic respiration

Bottom oxygen concetration

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Results

Diagenetic Modelling

Capet et al, 2016

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Results

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Conclusions

Sediments are a nightmare for marine modellers ..

.. but should be considered to resolve shelf biogeochemistry

We propose a methodology to do so in large scale oceanic models

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Conclusions

Sediments are a nightmare for marine modellers ..

.. but should be considered to resolve shelf biogeochemistry

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Conclusions

Sediments are a nightmare for marine modellers ..

.. but should be considered to resolve shelf biogeochemistry

We propose a methodology to do so in large scale oceanic models

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Conclusions