Changes between Version 2 and Version 3 of EwEugOtherMortality


Ignore:
Timestamp:
2010-11-18 03:04:23 (8 years ago)
Author:
shermanl
Comment:

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  • EwEugOtherMortality

    v2 v3  
    11== 2.8 Other mortality == 
    22 
    3 ‘Other mortality’ is the difference between total production and the sum of export, biomass accumulation, net migration, and predation mortality. ‘Other mortality’ is called ‘''M0''’ in some other models. These may also include a term for mortality called ‘''M1''’, referring to the mortality caused by predator groups not explicitly included in the model. This kind of mortality can, in Ecopath, be considered a part of the net migration rate (the prey ‘migrates’ out of the system, and may then be eaten.) Th[[#|]]is normally should not cause problems if the recommendation is heeded to include, in Ecopath models, all the groups that occur in an ecosystem, not just some of them. 
     3'Other mortality' is the difference between total production and the sum of export, biomass accumulation, net migration, and predation mortality. 'Other mortality' is called '' 'M0' '' in some other models. These may also include a term for mortality called '' 'M1' '', referring to the mortality caused by predator groups not explicitly included in the model. This kind of mortality can, in Ecopath, be considered a part of the net migration rate (the prey 'migrates' out of the system, and may then be eaten.) This normally should not cause problems if the recommendation is heeded to include, in Ecopath models, all the groups that occur in an ecosystem, not just some of them. 
    44 
    55Other mortality consists of organisms dying due to diseases, starvation, etc., and the animals or plants concerned end up as part of the detritus. This mortality can be entered in Ecopath in form of the ecotrophic efficiency (''EE''), i.e., as (1 - other mortality). The ecotrophic efficiency is, thus, the proportion of the production that is used within the system. It is what is accounted for in Ecopath. ''EE'' is entered on the [wiki:EwEugBasicInput Basic Input] form.