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Project Biovel

Pack Calculate quasi-extinction threshold pack


Created: 2014-07-30 14:00:20 | Last updated: 2014-08-14 12:05:20

This pack contains a workflow, a file and documentation (tutorial to run the workflow).This workflow estimates by simulation the quasi-extinction probability time cumulative distribution function for a structured population in an independently and identically distributed (iid) stochastic environment. This workflow is based on the popbio package (stoch.quasi.ext - Calculate quasi-extinction threshold, Stubben, Milligan and Nantel, 2013) based on the The MATLAB code in Box 7.5 (Morris and Doak ...

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Project Biovel

Pack Cohen cumulative distance pack


Created: 2014-07-23 13:43:22 | Last updated: 2014-07-24 08:21:00

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Cohen’s cumulative distance Workflow provides an environment to calculate the Cohen’s cumulative distance. The Cohen’s cumulative distance measures the difference between observed and expected vectors along the matrix path that the population would take to reach the expected population vector. It is a function of both the observed stage distribution (n0) and the structure of the matrix...

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Project Biovel

Pack Keyfitz's delta pack


Created: 2014-07-23 11:19:37 | Last updated: 2014-07-24 08:25:22

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Keyfit delta Workflow provides an environment to calculate the Keyfit delta value. Keyfitz’s delta is a measure of the distance between any two probability vectors (Keyfitz 1968). In this case is a measure of the distance between n (Observed Stage Distribution) and w (Stable Stage Distribution). The maximum value is 1 and the minimum value is 0 (when the vectors are identical).

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Project Biovel

Pack Simulate stochastic growth from a sequence of matric...


Created: 2014-07-10 12:05:44 | Last updated: 2014-07-30 13:48:06

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Simulate stochastic growth from a sequence of matrices Workflow provides an environment to simulate stochastic growth by projection using whole matrix selection techniques in an independently and identically distributed (iid) environment from a set of 2 or more projection matrices.Outputs:Equal selection dataStochastic projectionUnequal selection dataTo know more details about the analysis, Morris and D...

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Project Biovel

Pack Parametric Bootstrap or Resample a projection matrix...


Created: 2014-07-09 14:03:43 | Last updated: 2014-07-25 09:41:32

This pack contains a workflow, a file and documentation (tutorial to run the workflow). The Parametric Bootstrap or Resample a projection matrix Workflow provides an environment to resample a projection matrix using a multinomial distribution for transitions and a log normal distribution for fertilities (Stubben, Milligan, and Nantel. 2011). The resample is based on number of plants surveyed. The projection matrix A is first split into separate transition and fertility matrices. Dead fates ar...

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Project Biovel

Pack Bootstrap of observed census transitions pack


Created: 2014-07-09 12:56:51 | Last updated: 2014-07-25 10:37:19

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Bootstrap of observed census transitions (confidence intervals of λ) workflow for local execution calculates bootstrap distributions of population growth rates (λ), stage vectors, and projection matrix elements by randomly sampling with replacement from a stage-fate data frame of observed transitions. The goal of a demographic analysis is very often to estimate lambda, because lambda is es...

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Pack Net reproductive rate (Ro) pack


Created: 2014-07-04 13:59:07 | Last updated: 2014-07-25 11:25:32

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The . Net reproductive rate (Ro) Workflow provides an environment to calculate the net reproductive rate (Ro). Ro is the mean number of offspring by which a new-born individual will be replaced by the end of its life, and thus the rate by which the population increases from one generation to the next.

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Project Biovel

Pack Generation time (T) pack


Created: 2014-07-04 13:20:43 | Last updated: 2014-07-25 11:22:30

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Generation Time (T) Workflow provides an environment to calculate the generation time. Th generation time is the time T required for the population to increase by a factor of Ro (net reproductive rate). In other words, T calculates how much time takes to a plant/animal to replace itself by a factor of Ro.

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Project Biovel

Pack Transient dynamics pack


Created: 2014-07-04 10:59:17 | Last updated: 2014-07-25 12:17:07

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Transient dynamics or Calculate population growth rates by projection Workflow provides an environment to calculates the population growth rate and stable stage distribution by repeated projections of the equation n(t+1)=An(t) and to produce plots of the short-term dynamics and convergence to stable stage distribution using stage vector projections.Transient dynamic analysisPopulation projectionLambda o...

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Project Biovel

Pack Eigen analysis pack


Created: 2014-07-03 15:57:49 | Last updated: 2014-07-25 11:18:57

This pack contains a workflow, a file and documentation (tutorial to run the workflow).The Eigen analysis workflow provides an environment for the analysis of a stage-matrix and perform several analyses on it.The Eigen analysis results are a set of demographic statistics:Lambda or dominant eigenvalue (λ).The stable stage distribution (w).The sensitivity matrixThe Elasticity matrix.Reproductive value (v).The damping ratio (ρ).

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