Pack: Life Table Response Experiments Fixed design Year Effect in One Location or Place pack

Created: 2014-02-27 12:49:10      Last updated: 2014-08-27 09:58:12
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Title: Life Table Response Experiments Fixed design Year Effect in One Location or Place pack


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This pack contains a workflow, a file and documentation (tutorial to run the workflow).

The Life Table Response Experiments Year Effect in One Location or Place workflow provides an environment to analyse two or more matrices from different years in one location. The objective of this workflow is to determine the effects of the research years (2 or more) in one place on λ. This workflow performs a fixed LTRE, one way design (Caswell 2001).

LTRE is a retrospective analysis (Caswell 1989), beginning with data on the vital rates and on λ under two or more sets of environmental conditions (in this case 2 or more years in one location) (Horvitz, Schemske and Caswell 1997). The goal of the analysis is to quantify the contribution of each of the vital rates to the variability in λ. (Caswell 1989, 1996, 2001 in Horvitz, Schemske and Caswell 1997).

 

Fixed Treatments: Decomposing Years Treatment Effects in one location or place

A fixed-effect analysis treats the matrices as representative of particular conditions, either experimental or natural (high vs. low nutrients in a one-way model, for example, or year and spatial location in a two-way model). The goal is to determine how much a treatment level (in this case year) on λ is contributed by each of the vital rates. The analysis uses a linear approximation in which the sensitivities appear as slopes. The effect of a treatment on λ depends on its effect on each matrix entry and on the sensitivity of λ to that entry. (Horvitz, Schemske and Caswell 1997).

For more details of the analysis see: Retrospective Analyses: Fixed Treatments (page 262 in Horvitz, Schemske and Caswell 1997) and Chapter 10 Life Table Response Experiments (page 258 in Caswell 2001).

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  • Internal item

    Workflow: Life Table Response Experiment Year Effect in One Location or Place (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-08-14 08:38:34)

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  • Internal item

    File: Life Table Response Experiments Fixed design years effect in one place documentation (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-08-14 08:45:52)

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  • Internal item

    File: Matrix Terschelling 87-88 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:37:01)

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  • Internal item

    File: Matrix Terschelling 88-89 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:36:51)

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  • Internal item

    File: Matrix Terschelling 89-90 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:36:40)

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  • Internal item

    File: Matrix Terschelling 90-91 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:36:33)

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  • Internal item

    File: Matrix Terschelling 91-92 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:32:40)

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  • Internal item

    File: Matrix Terschelling 92-93 (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:32:34)

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  • Internal item

    File: Matrix Terschelling pooled data or weighted main matrix (Maria Paula Balcazar-Vargas)

    Added by Maria Paula Balcazar-Vargas ... more than 1 year ago (2014-03-28 14:39:13)

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