Black Birch Measurements

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tsharp
Posts: 419
Joined: Mon Mar 15, 2010 12:04 pm

Re: Black Birch Measurements

Post by tsharp » Wed Oct 01, 2014 4:42 pm

Bob:

WV Black Birch
80.4' Along Ansted Rail Trail
96.1' Cathedral SP
79.7' Coal Run - NRGNR
91.7', 85.7', 67.3' Along Hemlock Trail - Coopers Rock SP
83.2' Fanny Bennet Grove - MNF
82.9' #14 Unnamed drainage - GRNRA
98.1' Pierson Hollow Carnifex SP
66.6' Along Turkeybone Road - Private property
79.4' Sunrise Carriage Trail
The Cathedral, Hemlock Trail, Fanny Bennet, and Pierson Hollow trees are in OG stands

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dbhguru
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Joined: Mon Mar 08, 2010 9:34 pm

Re: Black Birch Measurements

Post by dbhguru » Wed Oct 01, 2014 6:56 pm

Turner,

Thanks very much. I've attached the Excel summary and initial analysis of 163 black birch measurements (sheet2). The summary statistics are the most relevant to profiling the species. A total of 52% of the trees exceed 90 feet in height. I'm sure this percentage will drop as we add more sites and measurements, but it does tell a story. The wispy, slender black birch grows rapidly and often makes it into the upper canopy, finding holes to grow into. I often see them twist and turn to make it into the light gaps. I also see evidence that most of the mature black birch have exploited past disturbances that have human origins.

I hope we can keep this project rolling until we have at least 700 or 800 trees representing a dozen or more states.

Bob
Attachments
BlackBirchDatabase.xlsx
(86.21 KiB) Downloaded 52 times
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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George Fieo
Posts: 123
Joined: Sat Mar 13, 2010 1:24 pm

Re: Black Birch Measurements

Post by George Fieo » Wed Oct 01, 2014 8:33 pm

Bob,

Here are some black birch measurements I have for Pennsylvania and Maryland. I have been without a computer for some time now and have several sites to report on yet. If I can't get a computer soon I will just post the numbers from my iPhone. Both Maryland sites are impressive with more than a dozen new state height records. One site alone has a RHI10 that is higher than the state's current RHI10.

Henry's Woods Jacobsburg SP, Pa.
4.1' x 91.6'
4.2' x 95.6'

Blumenthal Hollow, Pa.
8.9' x 94.3'

Five Mile Woods Preserve, Pa.
6.5' x 89.6'
5.6' x 103.1'

Valley Forge NP, Pa.
4.9' x 89.5'
3.6' x 89.9'

Tyler SP, Pa.
8.7' x 98.9'
5.9' x 103'
7' x 107'

Wissahickon Valley Park, Pa.
8.4' x 106'
7' x 107.5'
7.8' x 109.8'
~6' x 114.9'
5.3' x 115.4'

Fair Hill Wildlife Management Area, Md.
5.8' x 107.4'

Conowingo Pond Area, Md.
8.4' x 86.9'
6.4' x 103.6'
6.4' x 106.2'

I hope to have some more black birch numbers for you this Fall/Winter.

George

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dbhguru
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Re: Black Birch Measurements

Post by dbhguru » Thu Oct 02, 2014 7:28 am

George,

Wow, thanks! I'll post this right away. Very impressive numbers. The species has a lot to tell us.

BTW, we were just about ready to organize a search party and come looking for you. Great to hear from you.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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dbhguru
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Joined: Mon Mar 08, 2010 9:34 pm

Re: Black Birch Measurements

Post by dbhguru » Thu Oct 02, 2014 1:33 pm

Ents,

Here is the state summary for all black birches measured since the start of the project.
Screen shot 2014-10-02 at 2.16.52 PM.png
Screen shot 2014-10-02 at 2.16.52 PM.png (19.57 KiB) Viewed 1157 times
The largest birch, for which a girth was submitted, is a tree on Mount Tom State Reservation. It measures 9.2 feet around and is 80.1 feet tall. Another birch measures 8.5 feet in girth and is 92.2 feet tall. The tallest we have so far on the mountain is 103.3 feet. However, there are mature birches spread all over the mountain.

Mount Tom is a treasure trove of stately mature black birches. I recall back in the 1980s when DEM was going to do one of their famous improvement cuts, in the areas scheduled for thinning, every single black birch with any age to it was marked for cutting. I am absolutely serious. Fortunately, the forests of Mount Tom were spared and today we have what very well may be the finest display of mature black birches in all New England. Lots of looking left to do, but I am beginning to suspect that Mount Tom may earn that distinction.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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Will Blozan
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Joined: Fri Mar 12, 2010 7:13 pm

Re: Black Birch Measurements

Post by Will Blozan » Thu Oct 02, 2014 6:35 pm

Bob,

I am sorry to report that I generally pass up any black birch under 105 feet... My data are very biased that way and not sure if they are of much use.

Will

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dbhguru
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Re: Black Birch Measurements

Post by dbhguru » Fri Oct 03, 2014 10:43 am

Will,

I figured that sooner or later you'd join us and cause our jaws to drop. The more numbers the better. The question in my mind is how prevalent is the above 100-foot class, going from north to south. Are 100-footers common as weeds in Smokies? Elsewhere in the southern Appalachians?

As a rule, lumbermen dislike the species. Its value for timber is relegated to the past. Nature lovers like it, but probably relate to it more for the wintergreen flavor of its twigs, or as a wildlife species. We need to tell the story of the great species. So, cough up the numbers, brother Will. Lay some heavies on us.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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dbhguru
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Joined: Mon Mar 08, 2010 9:34 pm

Re: Black Birch Measurements

Post by dbhguru » Sun Oct 12, 2014 5:29 pm

Ents,

Here is a quick update on the black birch database being built.

Total # of trees measured: 308
No. of states represented: 5
Tallest tree (NC): 118.8
Shortest tree (MA): 66.5
Overall average: 93.4

The number of trees measured for Massachusetts stands at 164. The average height is 88.1 feet.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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dbhguru
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Joined: Mon Mar 08, 2010 9:34 pm

Re: Black Birch Measurements

Post by dbhguru » Tue Nov 04, 2014 9:36 pm

Ents

Today Ray Asselin, Bill Finn, and I continued our black birch measuring, documenting, and photograhing project on Mount Tom. We added about 13 new birches. We're up to 48 total for Mount Tom. The average height is 89.8 feet. Three trees exceed 100 feet.

I have 325 total BB measurements in the spreadsheet. Any birches any of you would like to contribute would be most appreciated. Thanks to those of you who have already sent in measurements.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

User avatar
dbhguru
Posts: 4519
Joined: Mon Mar 08, 2010 9:34 pm

Re: Black Birch Measurements

Post by dbhguru » Fri Nov 07, 2014 5:01 pm

Ents,

Ray Asselin and I went to MTSF to continue measuring black birches. We chose the ridge on the south side of Route 2 opposite the headquarters. Altogether we measured 27 birches. The average height is 93.4 feet with a maximum of 105.0. I have now measured 77 tree in MTSF. Their average is 91.3 feet with a high of 107 feet. Hopefully, Ray will have some images for us when he has a chance to download.

We now have 352 trees in the black birch database. Their average height is 93.25 feet with a maximum of 118.8 feet. This is a long way from common descriptions of the species.

Bob
Robert T. Leverett
Co-founder, Native Native Tree Society
Co-founder and President
Friends of Mohawk Trail State Forest
Co-founder, National Cadre

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