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Spatial sampling strategy. MODIRISK. Basis for sampling strategy. Grid of 10X10 km = 326 cells Three samples per grid cell = 978 samples Take into consideration: Major biotopes Seasonal variation Import risk . Proposed procedure.

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basis for sampling strategy
Basis for sampling strategy
  • Grid of 10X10 km = 326 cells
  • Three samples per grid cell = 978 samples
  • Take into consideration:
    • Major biotopes
    • Seasonal variation
    • Import risk

MODIRISK Kick-off-meeting

proposed procedure
Proposed procedure
  • Identify key habitats based on Corine LC classes by aggregating urban, agriculture, natural and import risk classes.
  • Calculate total surface per aggregated class
  • Assign proportional number of sample points to aggregated class.
  • Generate appropriate number of random sampling points within each class.
  • Randomly assign sampling points within each class to two sampling seasons.
  • Geocode and assign sample sites per team.

MODIRISK Kick-off-meeting

aggregation of corine lc data
Aggregation of CORINE LC data
  • CORINE includes 50 classes divided in five groups:
    • Artificial surfaces including urban and industrial
    • Agriculture areas
    • Forest and semi natural areas
    • Wetlands
    • Water bodies

MODIRISK Kick-off-meeting

corine data 50 classes
Corine data – 50 classes

MODIRISK Kick-off-meeting

class aggregation
Class aggregation
  • (1) Urban biotopes
  • (2) Land in the agriculture cycle
  • (3) Natural terrestrial habitats
  • (4) Risk of introduction areas: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes
  • (5) Areas excluded from sample: industrial and commercial units, roads, mines and mineral extraction sites, construction sites, sparsely vegetated areas
  • (6) Water bodies

MODIRISK Kick-off-meeting

corine 6 aggregated classes
Corine - 6 aggregated classes

MODIRISK Kick-off-meeting

sample size per aggregated class
Sample size per aggregated class

In blue = automated random assignment

In red = manual attribution in selected areas

MODIRISK Kick-off-meeting

173 random urban sampling points
173 random urban sampling points

MODIRISK Kick-off-meeting

slide10

564 random agri sampling points

MODIRISK Kick-off-meeting

slide11

199 random natural sampling points

MODIRISK Kick-off-meeting

non random sampling points
Non-random sampling points
  • Not yet included in map
  • 42 sampling points to be allocated in areas representing a particular risk of introduction: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes.
  • Additional samplings should also be conducted in other selected areas:
    • Zoos and safari parks (list available)
    • Second hand tire import/storage (list to be established)
    • Protected areas involving presence of large numbers of migratory birds (list available)

MODIRISK Kick-off-meeting

slide13

Sample: institute / year / season

MODIRISK Kick-off-meeting

sample per institute
Sample per institute
  • Rough division by province:
    • ITG (274 + 42): Antwerp, Limburg, Brabant
    • KBIN (293): Oost Vlaanderen, West Vlaanderen, Brabant
    • UCL (365): Hainaut, Namur, Luxembourg
  • Needs reassessment !!!

MODIRISK Kick-off-meeting

data base
Data base
  • Flexibility to re-allocate sampling areas
  • Geocode random sampling points to nearest relevant feature to ease sampling: road access, street names, house numbers, …
  • UTM numbering grid cells according to standard

MODIRISK Kick-off-meeting

web based modirisk survey map
Web based MODIRISK survey map
  • Online map (Google map) with status of field survey per team
  • Public access: important dissemination purpose because most urban samples will be conducted in house gardens
  • Link to entomological data base  future link with biodiversity data base
  • Password protected centralized data entry using Palmtop:
    • Field forms
    • Entomology forms
    • Cross check forms
  • Generate addresses in urban areas to contact prior to sampling

MODIRISK Kick-off-meeting

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