Lee, Thanks for the info. Congratulations on your publication.
Ed "The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science." - Albert Einstein ----- Original Message ----- From: Lee Frelich To: [email protected] Sent: Thursday, July 16, 2009 9:11 AM Subject: [ENTS] Re: Tree ring counting Ed: Speaking of tree rings, someone just pointed out this new paper on how to use tree rings to detect earthworms invasions, is already available online: Larson, E.R., K.F. Kipfmueller, C.M. Hale, L.E. Frelich, and P.B. Reich. 2009. Tree rings detect earthworm invasion and their effects in northern hardwood forests. In press. Biological Invasions. We just submitted the revised version of this paper to the editor two weeks ago, he accepted it immediately, the galley proofs came one week later, were sent back last week, and the paper is published online this week (printed version will follow in a few months)! That definitely beats the old days when it took years of back and forth by snail mail to get something published. The basic story is that when European earthworms invade, there is a period of a few decades where tree-ring width declines by 20-30% in sugar maple. This tree ring signature is independent of droughts and other causes of variation in tree rings, and therefore dates the time of invasion by the worms. The mechanism is probably loss of fine roots in the organic horizon (aka duff layer) of the soils, loss of mycorrhizae that sugar maple need, and warming and drying of the soil caused by loss of the insulating properties of the duff layer. Lee "The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science." - Albert Einstein --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected] -~----------~----~----~----~------~----~------~--~---
