ENTS, A listing of this sort also has other advantages. It is what Colby described as a complete species profile for the site. It allows easy calculations of various Rucker Indexes. But also by having this list, you can look at it and it will jump out at you that "Oh, I saw a taller Sassafras just the other day than the one listed here." You can see at a glance if there are taller trees you just haven't measured. Most people really into it know how tall the tallest species are, but the heights of the shorter species may not be as completely at the tip of your tongue. A listing of all the species measured tells you at a glance what species you haven't measured. This is often just an oversight, or they have not been measured because they are not that tall, but a listing such as this begs for missing data and measurements to be taken.
Ed ENTS, I might suggest that the best way to keep up with the Rucker Indexes for all of the sites would first to have a listing of all the trees from the site, ordered however you want. Then a second listing for the site would include only the tallest tree of each species, and every species measured at the site should be included, and have this list sorted tallest to shortest. Whenever a new taller specimen is found for a species, the old would be deleted from this tall list and the the new one inserted at the proper place in the hierarchy. Calculating a Rucker Index would then just consist of copying the contents of the top 5, 10, or 20 cells to an adjacent column, summing those, and dividing by the number of cells. That is what I did with Dales RI20 listings and our composite listings for the Allegheny River Islands. It worked very well. Ed --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org You are subscribed to the Google Groups "ENTSTrees" group. To post to this group, send email to [email protected] To unsubscribe send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/entstrees?hl=en -~----------~----~----~----~------~----~------~--~---
