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 Join me in the Eastern Native Tree Society at http://www.nativetreesociety.org and in the Primal Forests - Ancient Trees Community at: http://primalforests.ning.com/ ----- Original Message ----- From: Will Blozan To: [email protected] Sent: Friday, September 26, 2008 2:17 PM Subject: [ENTS] Re: Rucker Index Thoughts Bob, To significantly raise the Rucker of the Smokies or Congaree will be a monumental and likely impossible effort. Like Mohawk, the sites have been sampled many, many times and the maximum index has been largely identified. I need to calculate the R20 for Congaree. Will F. Blozan President, Eastern Native Tree Society President, Appalachian Arborists, Inc. ------------------------------------------------------------------------------ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, September 26, 2008 1:49 PM To: [email protected] Subject: [ENTS] Re: Rucker Index Thoughts Will, Ed The Great Smokies are off the charts - simply off the charts. There is no other forest in eastern North America that can touch that range of mountains for tall trees: not other mountain sites in North Carolina, not even the high index mountain forests of South Carolina that Jess has explored, not Savage Gulf or Fall Creek Falls in Tennessee, and not Congaree NP in South Carolina, unless our upcoming February trip uncovers high canopy forests with new record holders that have thus far not been discovered. To make such a discovery would be just as exciting a proposition as finding ever taller trees in the Smokies. I look forward to Congaree in February. I'm just praying for a low mosquito population at that time of year. God, I hate those little blooksuckers! Bob -------------- Original message -------------- From: "Will Blozan" <[EMAIL PROTECTED]> Ed, Great thoughts. I support the reasoning for the R5 and R20 indices. If only there was some way to incorporate the area needed to obtain a certain Rucker Value. An R5 acre, R10 acre, R20 acre index? Smokies R5 is 176.5 Smokies R20 is 156.6 (Jess, correct if I am missing something) Species Height Pinstr 188.8 Liritul 181.9 Tsugcan 173.1 Robipsu 171.8 Fraxame 167.1 Platocc 162.2 Carygla 159.7 Aescfla 157.3 Carycor 156.3 Picerub 155.3 Magnacc 151.9 Querrub 151.4 Tilihet 150.4 Queralb 147.1 Juglnig 144.3 Acersac 144.2 Fagugra 142.6 Acerrub 142.4 Quermon 142.3 Liqusty 142.3 R20= 156.62 Will F. Blozan President, Eastern Native Tree Society President, Appalachian Arborists, Inc. ---------------------------------------------------------------------------- --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
