forestgeo/fgeo.analyze

Update tables of mortality and growth

maurolepore opened this issue · 0 comments

maurolepore commented

Tue, Dec 4, 2018 at 1:45 PM Lao, Suzanne LAOZ@si.edu

As was done with the species abundance tables, we need to update the BCI growth and mortality tables on the forestgeo website also. ... The numbers should be very similar to the ones on the website, and you would have 2 more census intervals: https://forestgeo.si.edu/sites/south-america/barro-colorado-island/bci-species-growth-and-mortality

Paper that explains how the tables were calculated and code:

Some items yet unclear to me:

  • Should I use the data I used for the tables of abundance and basal area?

  • How are the time-intervals defined? For example, From the website it is not obvious how to resolve this: The interval 1995-2000 includes six years (1995, 1996, 1997, 1998, 1999, 2000), and 2000 overlaps with the interval 2000-2005.

Background:

On Tue, Dec 4, 2018 at 5:05 PM Lao, Suzanne LAOZ@si.edu wrote:

talk to Stuart and ask him whether we should leave the site as is, or whether we should recalculate the relative growth rates and add 2005-2010 and 2010-2015

What the columns mean and how the rates were calculated:

growth:

rate: observed relative growth rate (mean of log-transformed relative growth rates of individual trees, subsequently back-transformed); fitted: estimated growth rate from Gibbs sampler; lower and upper: 95 pct. confidence limits of the fitted rate, based on the Gibbs sampler (see Methods in Supporting Online Material). All rates are percentages, that is, 100 times the relative growth. _10 indicates data for the 10-99-mm dbh category, and _100 for stems dbh 100 and above.

mortality:

rate: observed mortality rate constant (based only on N, S, time); fitted: estimated mortality rate constant from Gibbs sampler; lower and upper: 95 pct. confidence limits of the fitted rate, based on the Gibbs sampler (see Methods in Supporting Online Material). All rates are percentages, that is, 100 times the rate constant. _10 indicates data for the 10-99-mm dbh category, _100 for stems dbh 100 and above.