I am trying to understand my population abundance data and am looking into
analyses of change point to try and determine, at approximately what point
do populations begin to change (either decline or increasing).

Can anyone offer suggestions on ways to go about this?

I have looked into bcp and strucchange packages but am not completely
convinced that these are appropriate for my data.

Here is an example of what type of data I have
Year of survey (continuous variable) 1960 - 2009 (there are gaps in the
surveys (e.g., there were no surveys from 2002-2004)
Relative abundance of salamanders during the survey periods


Thanks for your help, Nick

-- 
Nicholas M Caruso
Graduate Student
CLFS-Biology
4219 Biology-Psychology Building
University of Maryland, College Park, MD 20742-5815




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