Changes between Version 1 and Version 2 of EwEugNicheOverlap
 Timestamp:
 20101123 01:32:39 (9 years ago)
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EwEugNicheOverlap
v1 v2 22 22 The niche overlap index can be used to describe various kinds of niche partitioning. Here attention will be focused on the trophic aspects. In this case, the ''P,,ki,,'' and ''P,,ji,,'' in Eq. 30 can be interpreted as the fraction prey ''i'' contributes to the diets of ''j'' and ''k'', respectively. 23 23 24 Using an approach similar to that above, it is possible to quantify the predation on all preys ''m'' and ''n'' by all predators ''l'', and to derive a ‘predator’composition, estimated from24 Using an approach similar to that above, it is possible to quantify the predation on all preys ''m'' and ''n'' by all predators ''l'', and to derive a 'predator' composition, estimated from 25 25 26 26 [[Image(wiki:EwEugImages:08000074.png)]] ''' Eq. 31''' … … 30 30 [[Image(wiki:EwEugImages:08000075.png)]] ''' Eq. 32''' 31 31 32 Here ''X,,ml,,'' can be interpreted as the fraction the predation by'' l'' contributes to the total predation on ''m'', while ''Q,,l,,'' is the total consumption for predator ''l''. The predator compositions given above correspond to what Augoustinovics (1970) defined, in the context of inputoutput analysis, as ‘technical coefficients’.32 Here ''X,,ml,,'' can be interpreted as the fraction the predation by'' l'' contributes to the total predation on ''m'', while ''Q,,l,,'' is the total consumption for predator ''l''. The predator compositions given above correspond to what Augoustinovics (1970) defined, in the context of inputoutput analysis, as 'technical coefficients'. 33 33 34 Based on the predator composition a ‘predator overlap index’(''P'') can be derived as34 Based on the predator composition a 'predator overlap index' (''P'') can be derived as 35 35 36 36 [[Image(wiki:EwEugImages:08000076.png)]] ''' Eq. 33'''