3. Method to visualise the ecological state of
mediterranean mediolittoral ecosystems
through HOTSPOTS
o Where are the most degraded ecosystems ?
Method to present the spatial relationship
between a pressure source and its
surrounding ecosystems.
o How much and how far a pressure source
impacts its environment ?
4. Combination of “2d moving average”, CARLIT algorithm and
interpolation
continuous surface
Hotspots with low biodiversity, degraded ecosystems
5. 3 meters resolution
Map of the mediolittoral communities using CARLIT methodology
(Ballesteros et al. 2007)
Mediterranean French coast
6. CARLIT is calculated by selecting a segment of coast (WFD=Water
Body)
∑ (Length cover of a community x ecological value)
value at reference condition
Cystoseira amentacea var.
stricta
(Phaeophyceae, Fucales)
Trottoirs - Lithophyllum
byssoides
(Rhodophyceae, Corallinales)
Encrusting Coralines
Coralina elongata
Ulvales
Cyanobacterias
High Values
Low Values
= ratio [0;1]CARLIT ≈
7. Points every 50 meters along the
coast
For each point we calculate
CARLIT inside a 500m window
(Distance by the sea = across bays and around
capes )
CARLIT index is assigned to
the point
GIS programming
10. Easy to use for managers and decision makers
11. Create GIS database of pressure sources on the coast
Include characterics of the sources (size, number of boats…)
12. For each pressure source
A window increasing in size
select ecosystem data and
CARLIT index is calculated
3127 pressure sources
D-CARLIT
CARLIT
16. Google Earth
o Map of the mediolittoral
communities
o Hotspots
o Pressure sources +
characteristics
o D-CARLIT
http://med-impact.unice.fr
Creative Commons
Licence
