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1 Ecological landscape connectivity (corridors) Gebhard Banko EEA: Jean-Louis Weber ETC/TE: Ferran Paramo, Oscar Gomez, Stefan Kleeschulte Alterra: Sander Mucher, Irene Bouwman ETC/TE EiONET workshop Land and ecosystem accounting 30-31 January 2006 EEA, Copenhagen
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2 Ecological corridors Task: identify connectivity of landscape Requirement: reproducable methodology Challenge: Bridging the gap Link between available standardised data - CORILIS - derived from CLC 2000 data And scientific sound biological driven methodology - LARCH model - developed by Alterra DATA KNOWLEDGE
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3 Conceptual model Connectivity of landscape 1. patches 2. key patches 3. networks (with or without key patches) 4. Corridors
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4 forest patches
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5 Key patches > 30 km 2
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6 networks
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7 corridors
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8 forest patches networks
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9 LARCH modell (species oriented) Ecological profile :“a range of species with similar sensitivity to landscape resistance” (Opdam et al 2002) Key-population : “persistant population due to its low extinction rate, compensated by an equally small recolosiation rate (1 im/generation)” Key-patch : “patch in a network that supports key population”
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10 Ecoprofiles x x x x x x x x x x x x x x x x x x Pouwels et al, 2002 Dispersal range Key patch size
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11 Synergyies (translation of knowledge into data compatible terminology) LARCH Species group:CORILIS Dispersal distance: 25 km smoothing: 25 km Forest bound speciesClass 3.2 KP: 30 km 2 Thresholds (interactively): >70% for KP >60% for network Identification of corridors between networks (cost grid analysis)
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12 area sizes
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13 Work procedure 1. total sum FOREST classes 2. reclassify grid into 9 classes 3. convert grid into vector 1. calculate areas in vector file 4. apply area-thresholds for types of network 1. KP > 30 km2 2. network with KP > 120 km2 3. network without KP > 180 km2
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14 CORILIS forest data (311+312+313) Restrict anaylsis to central and southern Europe
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15 Conceptual model Connectivity of landscape 1. patches 2. key patches 3. networks (with or without key patches) 4. Corridors
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16 Reclassification according to key patches (KP) and networks (NW)
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17 NW with KP (dark blue) and NW without KP (light blue)
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18 Conceptual model Connectivity of landscape 1. patches 2. key patches 3. networks (with or without key patches) 4. Corridors Cost distance analysis Identification points to move to (source points) Selection of points to from (FROM points) Calculation of cheapest path manual interpretatoin of corridor types technical, important, core
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19 source points for cost distance calculation
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20 cost distance grid
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21 From-points I: centre points of core areas
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22 From-points II: systematic 100*100 km grid
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23 From-points: combination of two layers
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24 Cost paths and FROM points
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25 Cost paths
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26 Cost paths and CORILIS forest grid
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27 derivation of core corridors visual interpretation of automatically generated corridors differentiation into 3 classes technical corridors - resulting from regular grid-points - minor ecological importance important corridors - connecting major areas of forest coverage core corridors - connection between core areas - PLUS: manual digitising of missing core corridors due to the arbitrary selection of „source points“ for corridor analysis not all connection between core areas were found atomatically
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28 core areas and all corridors
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29 core areas and important corridors
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30 core areas and core coridors
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31 Corridor analysis Fragmentation of corridors by traffic infrastructure by urban morphological zones connectivity through Natura 2000
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32 roads (Teleatlas FCR=0)
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33 roads and corridors
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34 potential barriers of corridors 216 fragmentations
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35 Corridor analysis Fragmentation of corridors by traffic infrastructure by urban morphological zones connectivity through Natura 2000
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36 UMZs and CORILIS
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37 UMZs and corridors
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38 UMZ as barriers for corridors
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39 named UMZ
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40 Corridor analysis Fragmentation of corridors by traffic infrastructure by urban morphological zones connectivity through Natura 2000
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41 Natura 2000 areas
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42 Natura 2000 areas and countries
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43 Natura 2000 areas and corridors
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44 Natura 2000 areas in corridors
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45 corridors = Natura 2000
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46 Natura 2000 in the core area/corridor system 20 % of corridors are Natura 2000 areas
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47 conclusions Bridging DATA and knowledge Species oriented approach Key patch Network Corridor GIS based analysis Cost distance reproducable methodology Fragmentation and connectivity
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