1. Finnish Environment Institute, SYKE
Northern GIG (lakes)
ECOSTAT meeting
Italy, Stresa, Oct 2005
Ansa Pilke
Finnish Environment Institute, SYKE
A. Pilke, SYKE

2. Northern GIG WFD ecoregions based on Illies’ regions A. Pilke/SYKE
WFD ecoregions based on Illies’ regions

3. GIG organised acc. to water categories and pressures
A. Pilke/SYKE
Organisation
Northern GIG is a combination of lake and river GIGs, coordination since early summer 2005 by Finland (SYKE, A. Pilke)
WG Lakes (eutrophication) – NIVA, NO, Anne Lyche Solheim
WG Rivers (eutroph. and org.) – EPA, IRL, Martin McCarrigle
WG Acidification (both lakes and rivers) – Swedish University of Agricultural Sciences SLU, SWE, Willem Goodkoep

4. Pressures for lakes Pressures Eutrophication (all countries)
A. Pilke/SYKE
Pressures
Eutrophication (all countries)
Acidification (NO, SWE,UK)

5. Scope for lakes For eutrophication Phytoplankton Macrophytes
A. Pilke/SYKE
For eutrophication
Phytoplankton
Macrophytes
at first one type L-N1 tested

6. Scope for lakes For acidification
A. Pilke/SYKE
For acidification
Macroinvertebrates (littoral) (NO, SWE, UK)
Possibly fish (NO, SWE)

7. Types/lakes Eutrophication types
Types/lakes
A. Pilke/SYKE
Eutrophication types
L-N1, L-N2a, L-N2b, L-N3, L-N5 and L-N8
Acidification types
L-N5, L-N6
A. Pilke, SYKE

8. Metrics /lakes For eutrophication
A. Pilke/SYKE
For eutrophication
Biovolume, chl a, relative abundance of cyanophytes and chrysophytes

9. Metrics /lakes For acidification Three separate national indices:
A. Pilke/SYKE
For acidification
Three separate national indices:
Medin’s index
Raddum’s index
NIVA index

10. Data /lakes Fairly uniform sampling and analysis
A. Pilke/SYKE
Fairly uniform sampling and analysis
of samples, esp. in SWE, NO and FI,
for instance phytoplankton analysis (Olrik et al. 1998) and
fish standard sampling methods (Nordic net) etc.
Especially differences between monitoring programmes.

11. Phases of N GIG work
A. Pilke/SYKE

12. Work of Northern GIG /lakes
A. Pilke/SYKE
Ongoing work with eutrophication and phytoplankton
1. Analysis of data
Phytoplankton: To compare and evaluate
results on reference P and chl a
composition of phytoplankton
both based on work with REBECCA lakes

13. Work of Northern GIG /lakes
A. Pilke/SYKE
Phytoplankton composition, examples of recent work
Evaluation of changes of all the different classes of phytoplankton along the biomass (biovolume) gradient has been started (began with clear water type L-N2a in Tihany, later all N GIG types will be evaluated in each country).

14. Lake database of REBECCA project NIVA, Robert Ptacnic
Clear water lake type L-N2a + L-N5
A. Pilke/SYKE
perc. class %
100
Rest
Cyano 80
Chloro
Diato 60
Crypto 40
Dino 20
Chryso
Lake database of REBECCA project
NIVA, Robert Ptacnic
Biomass Chlorophyll a

15. Humic lake types L-N3 + L-N6
A. Pilke/SYKE
1.0
Rest
Cyano
0.8
Chloro
Diato
0.6
Crypto
0.4
Dino
0.2
Chryso
0.0
Biomass/Chlorophyll a

16. Work of Northern GIG
A. Pilke/SYKE
Planned work with eutrophication and macrophytes (during October – November)
2. Macrophytes in the N GIG intercalibration
To decide how to establish the base for macrophytes in the N GIG, how to compile the data, which metrics.

17. Work of Northern GIG 2. Macrophytes
A. Pilke/SYKE
2. Macrophytes
Data options: REBECCA or collection from N GIG countries. Clarified in near future.
Started with L-N1 (moderate alk., clear water type), this type covers not whole GIG area as IC sites, but probably (almost) all countries participate to this exercise)
Indices to be used at first: Wilby, G. Free, Phylib/Stelzer/Schaumburg

18. Next steps for lakes (Oct. – Nov. 2005
A. Pilke/SYKE
Finalisation of analyses, supported by analysis of REBECCA databases for eutrophication types
Updating of the work plan
Next meeting Nov 2005