outline according to cwis ex-post application

ICP ForestsCommon and Specific Workplan Items

Outline according to CWIs

Ex-post applicationAcidification/eutrophication under under different deposition scenarios (Specific Workplan Item c)

Robustness

Links to biodiversitySulphur and nitrogen deposition, soil acidification, eutrophication and vegetation effects (Specific Workplan Item b)

Quantified trendsComparing trends in sulphur and nitrogen deposition with EMEP results (Specific Workplan Item a)

Key parameters


Ex-post application

Development of acidification and eutrophication of forest soils under differentdeposition scenarios (Specific Workplan Item c)

ICP M&M recommended (26th TFM in Paris)Application of VSD+ and BERN ModelsCooperation between ICP M&M and other ICPs

ICP Forests cooperates with German NFC of ICP M&M (ÖKO-DATA)ÖKO-DATA will for 75-100 ICP Forests Level II plots calculate

Critical loads for acidity and nitrogen (SMB-Model)Critical loads exceedancesDynamics of C and N (VSD+ Model)Possibility degree

Species (BERN)Plant communities (BERN)

ScenariosDepositionClimate


Ex-post application

For one Level II plot andseveral years (1950-2030)

S and N depositionEMEP (1950-1980)ICP Forests (1996-2007)CCE (2020-2030)

CL-function for eutrophication

Forest1950-2003 not protectedThereafter protected


Ex-post application

Depending onBS and C/N

Different forest communitiesStarts as ash-beech forestRemains beech forest

Available forSpecies levelExtinction of species


Robustness

Regularly conductedLaboratory intercomparison exercises (ringtests)

Soil analysesSoil solution analysesPrecipitation (deposition) analysesNeedle-leaf chemistry

International intercalibration courses (ICCs)Crown condition

DefoliationBiotic and abiotic damage types

Deviations between labs decrease over time


Robustness

Results of water ringtestsSoil solutionPrecipitation

DecreasePercentage of non-tolerable results for each elementVariation between elements

0

5

10

15

20

25

3rd Test 4th Test 5th Test 6th Test 7th Test 8th Test 9th Test 10th Test

%

S P Ca Mg K N


Links with biodiversity

Canocial Correspondence AnalysisExplanation of variance in ground vegetation species by e. g.

pHBSCECN depositionS depositionBC deposition

on 477 Level II plots withGround vegetationSoil conditionDeposition

Modelled (EMEP)Measured by ICP Forests (181 plots)


Biodiversity

On 181 plotsFactors explained 19.23% of varianceMost important

Tree speciesSoilDepositionClimate

0

10

20

30

40

50

60

1 2 3 4

Imp

ort

ance

of

envi

ron

men

tal f

acto

r[%

of

exp

lain

ed

var

ian

ce]

Main tree species

Climate Soil Deposition

N deposition and BC deposition15.0% of the explained varianceSmall, but statistically significant impact


Quantified trends

Temporal trendsSO4

NH4 and NO3

Decrease minorN bulkN throughfall

Spatial trends comparedmeasured (ICP Forests)modelled (EMEP) 3

4

5

6

7

8

9

10

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

year

[kg

/ h

a-a

]

N-NH4 througfall (158)

N-NO3 throughfall (159)

N-NH4 bulk (150)

N-NO3 bulk (151)


Quantified trends

SuperimposedWet deposition (EMEP, 50x50 km)Bulk deposition (ICP Forests)


Quantified trends

For SO4: Visual coincidenceBlue ICP Forests plots in blue EMEP cells Yellow ICP Forests plots in yellow EMEP cellsBut r2 small (0.2 - 0.3)


Key parameters

AcidificationBS on 5500 Level I/II plotsANC on 250 Level II plotspH soil solution on 200 plotspH solid soil on 4000 plots


Key parameters

EutrophicationN pools on 515 Level II plotsNO3 leaching on 121 Level II plots


Results

Described in greater detail in 3 Technical Reports1 Executive Report (glossy)

Laid out in the Salle

outline according to cwis ex-post application

Documents