Changes between Version 1 and Version 2 of EwEugNicheOverlap


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Timestamp:
2010-11-23 01:32:39 (8 years ago)
Author:
shermanl
Comment:

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  • EwEugNicheOverlap

    v1 v2  
    2222The 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. 
    2323 
    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 from 
     24Using 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 
    2525 
    2626[[Image(wiki:EwEugImages:08000074.png)]] ''' Eq. 31''' 
     
    3030[[Image(wiki:EwEugImages:08000075.png)]] ''' Eq. 32''' 
    3131 
    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 input-output analysis, as ‘technical coefficients’. 
     32Here ''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 input-output analysis, as 'technical coefficients'. 
    3333 
    34 Based on the predator composition a ‘predator overlap index’ (''P'') can be derived as 
     34Based on the predator composition a 'predator overlap index' (''P'') can be derived as 
    3535 
    3636[[Image(wiki:EwEugImages:08000076.png)]] ''' Eq. 33'''