Tom's Blog

Saturday, February 19, 2011

More on the tree inventory at Pleasant Valley Conservancy

I finally found time to put together a summary of the tree database we finished a few weeks ago. Thanks again to Heisley and (especially) Amanda for their hard winter work on this. Trudging around in deep snow is not the best way to train for a Marathon.

The ArcMap software has lots of capabilities, and one is its ability to put together quickly and accurately a complete count of all categories of trees. (You could do this in Excel but it would probably take an hour.)

As the table shows, we have over 4000 trees, although some of them are present in only small numbers. The principal species are bur oak, white oak, red oak, and black oak, with lesser numbers of birch, cherry, hickory, Hill's oak, basswood, and black walnut.

I should emphasize that these counts are what is there at present, after more than ten years of restoration. When we started, the percentage of oaks was a lot lower.

Common name Latin name Count
Aspen Populus tremuloides 11
Basswood Tilia Americana 131
Birch Betula papyrifera 408
Black Oak Quercus velutina 545
Black Walnut Juglans nigra 117
Box Elder Acer negundo 2
Bur Oak Quercus macrocarpa 714
Cedar Juniperus virginiana 12
Cherry Prunus serotina 240
Elm Ulmus rubra 7
Hackberry Celitis occidentalis 62
Hickory; shag bark Carya ovata 211
Hills Oak Quercus ellipsoidalis 147
Red Maple Acer rubrum 5
Red Oak Quercus rubra 824
Red Pine Pinus resinosa 1
Sugar Maple Acer saccharum 2
Unidentified 4
White Oak Quercus alba 619
White Pine Pinus strobes 1
Yellow Bud Hickory Carya cordiformis 4
Total trees 4067


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