LANDSCAPE ECOLOGY SREM 3011 LECTURE 8 Dr Brendan Mackey Department of Geography The Australian National University
LANDSCAPE ECOLOGY SREM 3011 LECTURE 8 Dr Brendan Mackey Department of Geography The Australian National University
Scale'-key concept for unifying landscape ecology integral component of scientific method of Inquiry 1. Different notions of scale 2. Scale dependent independent biological and environmental attributes and concepts 3. Ecological hierarchy theory 4. Implications for spatial landscape ecology models A Unified Theory of Ecology Allen Hoekstra
‘Scale’ - key concept for unifying landscape ecology - integral component of scientific method of inquiry 1. Different notions of scale 2. Scale dependent /independent biological and environmental attributes and concepts 3. Ecological hierarchy theory 4. Implications for spatial landscape ecology models ‘A Unified Theory of Ecology’ Allen & Hoekstra
Different notions or dimensions of scale: 1. Cartographic scale 2. Space time 3. Grain 4. Extent 5. Resolution 6. Scale-dependency 7. Landscape texture 1:1000000,1:20000000 1:5000 1:10000 Large scale-big slow Small scale-small+ fast
Different notions or dimensions of scale: 1. Cartographic scale 2. Space & time 3. Grain 4. Extent 5. Resolution 6. Scale-dependency 7. Landscape texture 1 : 1 000 000, 1 : 20 000 000 1 : 5 000 1 : 10 000 Large scale - big + slow Small scale - small + fast
ypical organization of a gis database in a land management organization; the primary division is on the basis of scale, subsequent divisions are into theme dures, such as ensuring a common boundaries where appropriate mean tha and location Numerous scale-dependent applications and administrative pro scale must be the primary organizational basis Spatial dataset separation of scales 1:1.000,000 100,000 1:25.000 separation by theme
Typical organization of a GIS database in a land management organization; the primary division is on the basis of scale, subsequent divisions are into theme and location. Numerous scale-dependent applications and administrative procedures, such as ensuring a common boundaries where appropriate, mean that scale must be the primary organizational basis
Scale has two dimensions: Space and 2. Time Therefore, large scale phenomena are generally spatially big and change slowly Small scale phenomena are generally spatially little and change quickly Large scale= low frequency Small scale= high frequency eg Fire regime experienced by a forest (rate of return)
Scale has two dimensions: 1. Space and 2. Time Therefore, large scale phenomena are generally spatially big and change slowly Small scale phenomena are generally spatially little and change quickly • Large scale = low frequency Small scale = high frequency eg. Fire regime experienced by a forest (‘rate of return’)