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VLIZ Y o un g M a rin e
Scientists' D ay 2014
ŸActLHW
-Cefas
Ecosystem Models as Support to Eutrophication M anagem ent
in the North Atlantic O cean (EMoSEM)
La croix G e n e v iè v e 1. D esm it X.1, D ulière V .1, G yp e n s N.2, L a n c e lo t C .2, Billen G .3, G a rn ie r J.3, Thieu V.3, Silvestre M .3, Passy P.3,
La ssaletta L.3, G u itta rd G .3, Théry S.3, M é n e s g u e n A .4, T hou ven in B.4, Dussauze M .5, M a te u s M .6, N eves R.6, S obrinho J.6,
A s c io n e K en ov I.6, G a rc ia C .6, L e n h a rt H.7, Los H.8, Troost T.8, V a n d e r M o le n J.9
^ Royal Belgian Institute o f Natural Sciences, OD Nature, Brussels, BE ; 2■Ecologie des Systèmes Aquatiques, Université Libre d e Bruxelles, Brussels, BE ; 3 UMR Sisyphe, UPMC/CNRS, Paris, FR ;
^^^^ynam iquesd^Environnem en^ôtieU R 3EM ER D >louza^
Objectives
Suggest Innovative e c o lo g ic a l Indicators to a c c o u n t for Harmful Algal Blooms (HABs)
In th e G o o d Environm ental Status (GES) definition.
I V lU O L _ l .
Estimate the GES targets for e a c h coastal zone of the North East Atlantic (NEA).
Identify "realistic" scenarios o f nutrient re d u ctio n In the river w atersheds of NEA.
í*v% i
Assess th e Im p a c t o f th e "realistic" scenarios In the sea, a n d c o m p a re to GES
requirem ents.
r«w ^
Context
A
m ajor
ch a lle n g e
In
EU m arine
g o v e rn a n c e Is to re a ch the GES In th e NEA
(Fig. 1). This a re a Is fa cin g several
e u tro p h ica tio n problem s linked to the
hum an pressure In the w atershed. Human
a ctivity delivers, to the river system,
nitrogen (N) a n d phosphorus (P) In excess
to silica naturally Issued from rock
w e a th e rin g , th a t re a ch the coa stal zone
a fte r having b e e n processed alon g the
la n d -o c e a n a q u a tic co n tin u u m .
M itigating
coastal
eu tro p h ica tio n
problem s needs to Identify the m ajor
a n th ro p o g e n ic N an d P nutrient sources,
their transform ation paths alon g their
transfer to the coa stal sea a n d the
e c o lo g ic a l response o f the
coastal
ecosystem to these nutrient alterations.
M o rC n o s t
1t >
L '%<■
C hi
m g /r r b
10
.......... A.
0)
V , c. • ‘
TJ
\Y v i
f
*”
.V
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(C MUMtmWH ?»11
I s
L o n g itu d e (°E)
Fig. 1. M erls c h lo ro p h y ll a
c o n c e n tr a tio n ( p e rc e n tile 90) In 2011
M ethodology
M arine e c o lo g ic a l m odels (Fig. 2) will be
used to tra c k the nutrients In the sea, and
tra c e b a c k their riverine or o c e a n ic sources
w ith th e transb ou nd ary nutrient transport
m e th o d (TBNT [1]).
S pecific 'tra ckin g m etho ds' (TBNT, dlstanceto -ta rg e t require m en t (DTTR) estimates) will
be
used
to
tra c e
th e
natural
vs
a n th ro p o g e n ic origin o f excess nutrients In
sp e cific a re a [1, 2],
A g e n e ric w a te rshe d
m od el will be
co n stru cte d for the NEA rivers (Fig. 2) a n d
will be c o u p le d to existing e co lo g ic a l
m odels o f spe cific coastal areas to describe
pre sen t-d ay coa stal b lo o m developm ents.
Diverse
"realistic"
nutrient
re d u ctio n
scenarios
(where
diffe re nt
urban
w a s te w a te r treatm ents a n d agricultural
p ra ctice s are co m b in e d ) will be run a n d
their e c o lo g ic a l e fficie n cy will be estim ated
by com p ariso n w ith th e GES targets.
1. B elgia n C o n tin e n ta l Shelf
Seine Bight
3. Bay o f V ila in e
PCOMS
4. D ouro
5. M o n d e g o
5. Tejo
A prlstlne-llke scenario will be run to scale
curre nt coa stal e u tro p h ica tio n problem s In
e a c h coastal zone a n d Identify spe cific GES
targets.
Seneque-Riverstrahler
G eneric basin river model
A
/IB Expected
S H B a results
S H a ------------------------------------------------------------------- V
f
M IR O & C O -3 D
ECO-MARS 3D
This m odelling w o rk will allow to scale hum an vs natural Influences In m arine i
e u tro p h ica tio n , a n d to Inform a b o u t a p p ro p ria te future m a n a g e m e n t choices
with:
• Inn ovative e c o lo g ic a l Indicators
• Description o f e u tro p h ic a tio n problem s In the NEA a n d their causes
• C om parison of the curre nt e u tro p h ic a tio n status w ith a "prlstlne-llke" status
• "R ealistic" future scenarios for w a te rshe d m a n a g e m e n t, a n d Im pacts a t sea
EMoSEM's o u tc o m e will be transferred to M em b er States responsible for W ater
Fram ew ork Directive (WFD) a n d M arine Strategy Fram ework Directive (MSFD)
operations, and to the OSPAR Commission.
0
200 Km
F ig . 2. M a p s h o w in g
th e d o m a in o f th e
b a sin -rive r m o d e l a n d
th e 3 c o a s ta l m a rin e
e c o s y s te m m o d e ls
Acknowledgements
The EMoSEM p ro je ct (2013-2014) Is fu n d e d by the
Belgian Science Policy Office (BELSPO) and the I rench
Research Agency (ANR) in the frame of the EU 1117
ERA-NET Seas-era p ro gra m (h ttp ://w w w .se a s-e ra .e u )
REFERENCES:
[1] Ménesguen A., Cugier P., Leblond I. 2006. A new numerical technique for
tracking chem ical species in a multisource, coastal ecosystem, applied to
nitrogen causing Ulva blooms in the Bay o f Brest (France). L&O, 51: 591-601.
[2] Lenhart H., Desmit X., Große F., Mills D., Lacroix G., Los H., Ménesguen A.,
Pätsch J., Troost T., van der Molen J., van Leeuwen S., Wakelin S. 2013. Report
on "distance to target" modelling assessment by ICG-EMO. OSPAR
Eutrophication series N°599.
httD ://w w w 2. m um m .a c.b e /e m o s e m /