What is List Length Analysis?
Lists are species data that, at a minimum, constitute a list of species identified during a survey, from which the number of species encountered (list length) can be calculated. List Length Analysis (LLA) is a technique developed to estimate population trends from lists using logistic regression in a Bayesian framework.
The Liszt package provides a straightforward way of conducting a Bayesian List Length Analysis of change through time using species list . It permits multi-species evaluation using both the framework described in Szabo et al. (2010) for estimating trends, and the extension for estimating comparative trends after Barnes et al. (2014 online).
To facilitate your use of LLA and Liszt, a Guide has been created and is free to download HERE . It provides stepwise instructions for conducting LLA using Liszt. It also contains asummary of the theoretical underpinnings of LLA. A more detailed explanation of the mathematical and theoretical basis can be found in Szabo et al. (2010). Other examples of LLA can also be found in the reference section at the end of the Guide.
In return for the use of this package, we require that you acknowledge its use. Please cite the package as Barnes M, Morris W, Venables WN (2012) Liszt Package.
Image credits: Panama frog, Harold Henry; Superb Fairy Wren, Jeremy Ringma; and Calopteryx virgo, Arnoia Baños de Molgas.