ENTS Executive Committee

Robert T. Leverett

 Friends of Mohawk Trail State Forest: Cofounder (1993), President, and principal old growth forest ecologist for this federally recognized non-profit environmental organization and an officially recognized Friends organization to the state forests and parks of the Commonwealth of Massachusetts.

 Eastern Native Tree Society (ENTS): Cofounder, executive director, and principal mathematician of ENTS a forest and tree advocacy organization with 380 members devoted to scientific research, tree modeling and measurement, education, and general enjoyment of forests and trees. Membership consists of academics, government scientists, professional foresters, arborists, research scientists in environmental organizations, and ordinary citizens. The core of ENTS is an advanced tree measuring group, which develops methods for measuring trees to a high level of accuracy.  

 Ancient Eastern Forest Conference Series Principal architect, and presenter. Conferences held on eastern old growth forest sites bring together academics, resource managers, and environmental activists to share information on eastern old growth and present technical papers. Conferences held at University of North Carolina; Williams College, MA:  University of Arkansas(2 events): Clarion University of Pennsylvania: University of Minnesota, Harvard University-Harvard Forest, Sweet Briar College, VA, and the University of New Hampshire, Eastern Kentucky University.

 Forest Summit Lecture Series Cofounder with Professor Gary Beluzo Sponsored annually by Holyoke Community College, Holyoke, Massachusetts as a public service. Six conferences held to date. Conferences present updated information of old growth forests in the East. Leverett is the primary presenter on Massachusetts old growth sites.

 Eastern Old Growth Forest Clearing House - Georgetown, KY: Advisor and consultant  to this organization dedicated to accumulating and archiving information on eastern old growth forests


 ‘Eastern Old Growth Forests-Prospects for Rediscovery and Recovery A co-conceptualizer of the book with Dr. Mary Byrd Davis. An assistant editor and a coauthor of this widely received book on eastern old growth forests. A publication of Island Press (1996).

Stalking the Forest Monarchs-A Guide to Measuring Champion Trees Coauthor of. self-published book with Will Blozan on how to measure champion trees (1997). Included new measurement techniques.

Old Growth In The East, A Survey Wrote forward and lead essay for Dr. Mary Davis's publication seminal publication on the old growth sites in the East, 1993. Provided the data for southern New England and selected sites in northern New England, New York, Pennsylvania, and the southern Appalachians. Assisted Mary Davis with the 1996 update.

‘Wilderness Comes Home: Rewilding the Northeast,’  Christopher McGrory Klyza, ed.  Wrote lead chapter entitled "Old-Growth Forest of the Northeast."  Published by University Press of New England, 2001.

‘Sierra Club Guide Book to Ancient Forests of the Northeast’  Coauthor with Bruce Kershner of this 2004 book on old growth sites in the Northeast.

‘American Indian Places – A Historical Guidebook’  Contributor to this book organized by Frances Kennedy. Houghton Mifflin Company, 2008

John Davis, Conservation Director of the Adirondack Council, commented on Bob and his role as an "Evangelist for Old Growth":  "It was your contagious and charismatic enthusiasm for big and old trees in part, Bob, but also your commitment and dedication to wild forests, your powers of articulation in describing them, your sleuth-like ability to find them, and your moving sermons on their behalf!  In short, with respect to great trees and wild forests, you speak with authority.  You've a clear vision of how the East should be broadly and wildly forested, again some distant day."

A more detailed profile can be found here.

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Will Blozan

President, Eastern Native Tree Society, President, Appalachian Arborists, Inc., ISA Certified Arborist SO-4032A http://www.appalachianarborists.com/ 

The ENTS president is a certified arborist and former science technician with the GSMNP. Will has a widely recognized reputation as a tree measurer. He has been featured in articles, on TV., and on radio. Will is a co-author of "Stalking The Forest Monarchs - A Guide To Measuring Champion Trees". He has climbed and measured the tallest or among the tallest trees in South Carolina, Georgia, North Carolina, Tennessee, Pennsylvania, Massachusetts, and New Hampshire.

Will Blozan helped organized and mapped the structure of the Middleton Oak, in South Carolina, the Sag Branch Tulip - the first two tree to be mapped in eastern United States. Will organized and directed the Tsuga Search Project that documented the largest and greatest of the Eastern hemlock trees found anywhere, many of them hundreds of years old, prior to their untimely death as the result of infestation by an invasive insect - the Hemlock Wooly Adelgid. Will Blozan has recently become involved in a canopy mapping project of some of the giant Sequoia's in Whittaker Forest in California.

Lee Frelich

Vice President of The Eastern Native Tree Society

Lee E. Frelich is Director of the University of Minnesota Center for Hardwood Ecology. He received a Ph.D. in Forest Ecology from the University of Wisconsin-Madison in 1986. Frelich teaches courses in Forest Fire Ecology and Landscape Ecology on St.Paul Campus. He has advised 18 graduate students, and is a senior member of the Conservation Biology, Natural Resource Science and Management, Ecology, and Invasive Species Graduate Programs. Frelich has published numerous papers on forest ecology and has been listed among the top 1% of all scientists in the world in the Science Citation Index, Ecology and Environment Category. He has appeared in the news media 200 times including /The New York Times/, /Newsweek/, /National Geographic/, and many TV and radio stations. Current research interests include fire and wind in boreal forests, long-term dynamics of old-growth hemlock and maple forests, invasive earthworms in forests, and global warming.

Dr. Lee Frelich is one of the most distinguished forest ecologists in the United States and the foremost expert on natural forest disturbance regimes in the forests of the upper Mid-West. He is the author of "Forest Dynamics and Disturbance Regimes". Lee is often called on as an expert witness on subjects that span the spectrum of forest issues from the potential impact of climate change to what constitutes an old growth ecosystem.



Edward Frank

I am a member of the Executive Committee of the Native Tree Society (NTS) http://www.nativetreesociety.org and serve at webmaster of their website and as administrator of the NTS Bulletin Board at http://www.ents-bbs.org.  I am the editor of the groups’ monthly magazine eNTS: The Magazine of the Native Tree Society http://www.nativetreesociety.org/ magazine/index_magazine.htm.   I am involved with a number of the groups.’ research projects including documentation of patches of old growth forest and significant tree sites.  Some representative articles include among others: Trees and Forests of the Allegheny  River Island Wilderness and Nearby Islands:  Interim Report through December 2011 by Edward Frank, Dale Luthringer, Carl Harting. and Anthony Kelly, Pockets Full of Forest in Fall 2011 issue of the Bulletin of the Eastern Native Tree Society, Vol. 6, No. 4 , The Really, Really Basics of Laser Rangefinder/Clinometer Tree Height Measurements ,  and On Defining a Forest Aesthetic.

I am by training a geologist with a BS degree from Western Kentucky University, and MS in Geology from Mississippi State University. Thesis title: Aspects of Karst development and Speleogenesis Isla de Mona, Puerto Rico: An Analogue for Pleistocene Speleogenesis in The Bahamas. I am a long time member of the national Speleological Society.  I have peer reviewed published papers in fields ranging from spelean history, geology, archaeology, vertebrate paleontology, karst processes and speleogenesis. Some examples:  Journal of Cave and Karst Studies, Vol. 60(2), August 1998.   

I worked for the BLM at the Pecos River Projects Office in New Mexico on the Brantley Dam Feasibility Project. I was a geologist for engineering firms preparing surface mine permits for the Pa. Bureau of Mining. I was research Faculty at the University of Central Florida's Sinkhole Research Institute with duties including the investigation of new sinkhole openings in the State of Florida, and maintenance of the Florida Sinkhole database. I was a Teaching Assistant at the University of Minnesota and at Mississippi State University.

I am an avid writer, photographer, and videographer. I am suave, sophisticated, intelligent, witty, charming, sexy, devilishly handsome, and above all modest.span>

Steve Galehouse

I am a life-long resident of Northeast Ohio, currently from Bay Village, a western suburb of Cleveland. I became interested in "the woods" at a young age and have continued with the interest throughout my life.

I graduated from Miami University in 1973 with a Bachelor's degree in Sociology, but while there developed a keen interest in Botany, especially dendrology, taxonomy and native flora.

I have been involved in the nursery industry most of my adult life, primarily as a garden center owner/operator. Native trees and shrubs are a primary interest for me, but I also enjoy exotic woody ornamentals and herbaceous plants.

Since becoming involved with ENTS I have been revisiting, measuring, and recording many of the wooded areas I knew as a youth, especially those in the Cuyahoga River valley, most now a part of the Cuyahoga Valley National Park. Additionally I am very interested in the woodlands of central Ontario, especially the Island Lake Forest and Barrens Conservation Reserve, an area I have been visiting each summer for over 40 years.



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Don Bragg

Research Forester
USDA Forest Service

   Southern Research Station

   P.O. Box 3516 UAM

   Monticello, AR 71656

I have engaged in multiple research projects related to the upland forests of the Midsouth region.  This has included studies on ice damage to pine plantations in the South, investigation of the Cross Timbers woodland in western Arkansas, and completion of long-term growth and yield projects.  Much of my work has also concentrated on the refinement of silvicultural techniques for the development of old-growth-like attributes in managed stands of the northern Lake States and the Midsouth (primarily Arkansas). 


B.S. (1992) Forestry, Michigan Technological University

M.S. (1995) Forestry, Michigan Technological University

Ph.D. (1999) Forest Ecology, Utah State University


I am a member of the Society of American Foresters, the Ecological Society of America, the Forest History Society, the Torrey Botanical Society, the U.S. Chapter of the International Association of Landscape Ecologists, and the Natural Areas Association.



Select Publications:

SRS-RWU-4159 Ancient, Big, and Historical Trees of Arkansas, Past and Present: http://www.srs.fs.usda.gov/4159/about/Scientists/

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Don Bertolette - Founder and President of the Western Native Tree Society

My career started in as a pre-Forestry community college student working for the BLM as a Forestry Aid (GS-3) with BLM in Eastern Oregon, and with a few exceptions (as material coordinator/pipefitter supervisor with Fluor Engineers and Constructors, in Saudi Arabia) I stayed the course with federal land management agencies through retirement last year as a GS-12 program manager, with the National Park Service, Grand Canyon National Park, AZ.

My education started early on pursuing a Bachelor of Science degree in Forest Resources Management, which I completed at Humboldt State University in 1983. After nearly a decade with the USFS, I was encouraged to pursue my Master of Science degree in Forestry with University of Massachusetts, at Amherst, where I specialized in Remote Sensing of Old-growth Forests, and successfully defending thesis in 1993.

Returning to the West (Arizona/Alaska), I developed skills in GIS that eventually led to Fire Area Growth Simulation, to model wildfire growth. With additional studies at Northern Arizona in Ecological Restoration, I obtained NEPA compliance for, and completed Wildfire Hazard Reduction Research project at Grand Canyon National Park. At my retirement from Grand Canyon, I was Vegetation Program Manager (Developed Area). Since retiring in 2007, I’ve continued participation with ENTS/WNTS, the Cook Inlet Chapter of SAF, and am Alaska’s Big Tree Coordinator. In my spare time, I’m an apprentice Beer Judge, and actively pursue excellence in Anchorage’s world-class brewing venues.

Don Bertolettes Early Days in Forestry June 2008

Michael W. Taylor

Vice-President of the Western Native Tree Society, is now the American Forests champion tree coordinator for California. Michael W. Taylor is a leading discoverer of champion and tallest trees - most notably Coast Redwoods. In 2006, Michael co-discovered the tallest known tree in the world, a coast redwood (sequoia) now named "Hyperion". He also discovered "Helios" and "Icarus", the 2nd and 3rd tallest.  National Geographic made a video about the discovery and measuring of Hyperion. The discovery made headlines.   Taylor has discovered 50 coast redwoods over 350 feet tall, and co-discovered approximately 100 more over 350 feet with Chris Atkins and Stephen Sillett, who is the first holder of the Kenneth L. Fisher Chair in Redwood Forest Ecology at Humboldt State University. Taylor and Sillett have collaborated and measured remarkable previously unknown redwoods. Their discoveries have fueled research and public interest in coast redwoods, which are now a World Heritage Site.  Michael is a main character of the non-fiction book (2007) The Wild Trees. The narrative includes how Taylor began exploring for tall trees, measuring tallest trees, and later networking with Pacific coast forest researchers.

Dr. David Stahle 

Cofounder of the Eastern Native Tree Society, The Grand ENT of the Eastern Native Tree Society

Distinguished Professor, University of Arkansas, Director, Tree-Ring Laboratory.   Professor of Physical Geography and the Conservation of Natural Resources.  Dr. Stahle's research interests include all aspects of  dendrochronology, particularly climate change and the proxy evidence for past variation in the El Nino/ Southern Oscillation and other large scale atmospheric circulations. Dr Stahle has developed GIS-based predictive models for the location of ancient forests, and is conducting active research in the United States, Mexico and Africa. Dr. Stahle's research is funded by NOAA , NSF, NPS and the USGS and he has published in a variety of journals including, Science, Nature, Journal of Climate and Bulletin of the American Meteorological Society. Dr. Stahle has taught courses in Physical Geography and Conservation of Natural Resources. 

Ph.D., Arizona State University, Geography 1990

M.A., University of Arkansas, Geography 1978

B.A., University of Arizona, Anthropology, 1973




NTS Organization

NTS People -Alphabetical