ecostat meeting – ispra (it), 03+04 july 2007 1 of 14 cbriv gig macrophyte intercalibration
TRANSCRIPT
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 1 of 14
CBriv GIG Macrophyte Intercalibration
CBriv GIG Macrophyte Intercalibration
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 2 of 14
CBriv GIG Macrophyte Intercalibration
Content
National macrophyte assessment methods
Macrophyte intercalibration database
Intercalibration Option 2: Use of common metrics
Intercalibration Option 3: Direct comparison
Conclusions and outlook
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 3 of 14
CBriv GIG Macrophyte Intercalibration
National macrophyte assessment methods
country name pressure
AT AIM Rivers eutrophication, flow, structure
BE (FL) MAFWAT non-specific
BE (WL) IBMR eutrophication
DE Reference Index non-specific
FR IBMR eutrophication
NL Maatlatten non-specific
PL MIR eutrophication
UK LEAFPACS eutrophication
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 4 of 14
CBriv GIG Macrophyte Intercalibration
Macrophyte intercalibration database
… currently covering
• ~ 1400 surveys,
• ~ 1200 sites,
• 16 countries,
• 9 IC (sub-) types,
• ~ 60% belonging to R-C1.x.2, R-C3, R-C4.x.2.
Purpose: Common analyses and testing of IC Options
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 5 of 14
CBriv GIG Macrophyte Intercalibration
Intercalibration Option 2: Use of common metrics
3macrophyte taxa recorded by all national methodsparticipating in intercalibration of (sub-)type
TAXONOMIC BASIS FOR INTERCALIBRATION COMMON METRIC
country
Acountry
B
country
C
RMNI (UK)IBMR (FR, BE)MIR (PL)TIM (DE)MA-index (AT)
I T E
MIn
dex o
f Tro
ph
y for
Eu
rop
ean M
acrop
hytes
1
COMMON INDEX DEVELOPMENT
Austria, France, Belgium, Germany,
Poland, Netherlands, Great
Britain
DIS
T2
RE
F
REFERENCE AND DISTURBANCE INDICATORS
4 Σ (ITEM score • Abundance)
Σ AbundanceIC Common Metric: I T E M =
(SUB-)TYPE SPECIFIC CALCULATION OF COMMON METRIC
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 6 of 14
CBriv GIG Macrophyte Intercalibration
5
I T E
MI
T E
M
A B C A B Ccountry country
REF taxa DIST taxa
harmonised(sub-)type specific
I T E M - thresholds
DEFINITION OF INTERNATIONAL SPECIES RESPONSE GROUPS
6
Abundance
I T E M
Reference value(e.g. 50% reference taxa and 5% disturbance indicators)
REFERENCE / BOUNDARY VALUES FOR INTERCALIBRATION COMMON METRIC
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 7 of 14
CBriv GIG Macrophyte Intercalibration
Intercalibration Option 2: Use of common metrics Discussion
• ITEM not related to “non-pressure-specific” lowland methods (BE [FL], DE, NL).
• Some participating countries are lacking data.
• Currently no common IC reference concept available.
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 8 of 14
CBriv GIG Macrophyte Intercalibration
Intercalibration Option 3: Direct comparison
Testing of Original CB lakes GIG approach and Class-by-Class approach
R-C1.x.2
0%
25%
50%
75%
100%
FR AT PL UK NL BE DE
4
3
2
1
0
-1
-2
-3
-4
R-C1.x.2
1
1,5
2
2,5
3
3,5
4
4,5
5
BE DE NL PL mean
H
G
M
P
B
BE (FL)
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 9 of 14
CBriv GIG Macrophyte Intercalibration
Intercalibration Option 3: Direct comparison Discussion
• Constraints of national methods became uncovered: e.g. species-rich sites are underrated by weighted average metrics.
• Option 3 seems highly conservative: countries falling outside must make
quite substantial changes to their classifications in order to harmonise.
• Currently no intercalibration possible due to large differences
in classifications: further analytical refinements necessary.
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 10 of 14
CBriv GIG Macrophyte Intercalibration
Conclusions
State-of-the-art allows for
• Intercalibration of methods assessing eutrophication,
• Intercalibration of types where nutrient pressure plays the major role (mountain rivers).
= Incomplete intercalibration
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 11 of 14
CBriv GIG Macrophyte Intercalibration
Conclusions
Different assessment concepts for lowland rivers:
• Lowland rivers show comparatively small trophic gradient
MOUNTAINS
LOWLANDS
oligo-trophic
meso-trophic
eu-trophic
REFERENCESTATE
REFERENCESTATE
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 12 of 14
CBriv GIG Macrophyte Intercalibration
Conclusions
Different assessment concepts for lowland rivers:
• Multitude of co-acting pressures
REFERENCESTATE HYDRSTRC
MEC
HC
HEM
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 13 of 14
CBriv GIG Macrophyte Intercalibration
Conclusions
Different assessment concepts for lowland rivers:
• Lowland rivers show comparatively small trophic gradient,
• Multitude of co-acting pressures.
Response-oriented holistic assessment including taxonomic composition measures and functional community attributes (e.g. growth forms).
Conceptually different from eutrophication assessment.
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ECOSTAT meeting – Ispra (IT), 03+04 July 2007 14 of 14
CBriv GIG Macrophyte Intercalibration
Steps in a possible continuation
• Collection of more data (2007’ monitoring cycle).
• Update on national macrophyte methods.
• Definition of common reference basis for intercalibration.
• Further advancements of IC Options 2 and 3.
We are eager to carry on.Will you like us to continue?
Results expected by September 2008.