Changes between Version 1 and Version 2 of EwEugCyclesAndPathways
- Timestamp:
- 2010-11-23 01:49:33 (13 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
EwEugCyclesAndPathways
v1 v2 20 20 '''Cycles (living)''' 21 21 22 The routine identifies all cycles in the system excluding detritus and displays these, in ascending order, starting with ‘zero order’ cycles (‘cannibalism’). In addition, the total number and the mean length of the cycles will be displayed.22 The routine identifies all cycles in the system excluding detritus and displays these, in ascending order, starting with 'zero order' cycles ('cannibalism'). In addition, the total number and the mean length of the cycles will be displayed. 23 23 24 24 '''Cycles (all)''' 25 25 26 The routine identifies all cycles in the system and displays these, in ascending order, starting with ‘zero order’ cycles (‘cannibalism’). In addition, the total number and the mean length of the cycles will be displayed.26 The routine identifies all cycles in the system and displays these, in ascending order, starting with 'zero order' cycles ('cannibalism'). In addition, the total number and the mean length of the cycles will be displayed. 27 27 28 28 '''Cycling and path length''' 29 29 30 The ‘cycling index’is the fraction of an ecosystem's throughput that is recycled. This index, developed by Finn (1976), is expressed here as a percentage, and quantifies one of Odum's (1969) 24 properties of system maturity (Christensen 1995). Recent work shows this index to strongly correlate with system maturity, resilience and stability.30 The 'cycling index' is the fraction of an ecosystem's throughput that is recycled. This index, developed by Finn (1976), is expressed here as a percentage, and quantifies one of Odum's (1969) 24 properties of system maturity (Christensen 1995). Recent work shows this index to strongly correlate with system maturity, resilience and stability. 31 31 32 In addition to Finn's cycling index, Ecopath includes a slightly modified ‘predatory cycling index’, computed after cycles involving detritus groups have been removed.32 In addition to Finn's cycling index, Ecopath includes a slightly modified 'predatory cycling index', computed after cycles involving detritus groups have been removed. 33 33 34 34 The path length is defined as the average number of groups that an inflow or outflow passes through (Finn 1980). It is calculated as