Vegetation
 
 
Approximately 50% of the watershed area is covered with forest. Individual forested area ranges in size from less than 50 acres to more than several hundred acres. They are interspersed throughout the area with pasture, hay, and crop fields. This forest land is composed of trees varying in size from small seedlings to large mature sawtimber. Forest land is defined as land that is at least 10% stocked with trees of any size.
 
Table 14 lists native and exotic tree species that are present in the watershed as compiled by the Pennsylvania Bureau of Forestry:
 
TABLE 14. Native Tree Species of the Dunkard Creek Watershed
1 Oak Species (Red, White, Black, Chestnut, Scarlet, Shingle, Post)
2 Hickory Species (Shogbark, Bitternut, Mockernut, Red)
3 Maple Species (Sugar, Red, Black, Silver, Boxelder)
4 American Beech
5 Blackgum
6 White Ash Species (White, Green)
7 Big-Tooth Aspen
8 American Basswood
9 Tulip-Poplar
10 Black Walnut
11 Butternut
12 Black Cherry
13 Black Locust
14 Honey Locust
15 Elm Species (American, Slippery)
16 Ohio Buckeye
17 Yellow Buckeye
18 Pawpaw
19 Dogwood Species
20 Willow Species
21 Cottonwood Species
22 Cucumber Magnolia
23 Hackberry
24 Persimmon
25 Sycamore
26 Sawwood
27 Ironwood
28 Musslewood
29 Eastern Redbud
30 Serviceberry
31 Eastern Hemlock
32 Eastern White Pine
33 Sassafras
Native Shrubs Plantation Species Exotic Species
1 Viburnum Species 1 Pine Species 1. Tree-of-Heaven
2 Spicibrish 2 Spruce Species 2. Horse Chestnut
3 Witch Hazel 3 Fir Species 3. Kentucky Coffeetree
4 Hazelnut 4 Larch 4. Norway Maple
5 Sumac Species   5. Catalpa
 
According to the Pennsylvania Bureau of Forestry, the Gypsy Moth insect first caused noticeable tree defoliation in the watershed in June of 1995, mostly in the Mount Morris area. In 1996 the effects of the insect could be seen in the western most reaches of the watershed. Many of the oak stands along the ridge tops and on the southwest facing slopes were heavily defoliated in June of 1996.
 
It is uncertain just how this insect will ultimately affect the vegetation of the watershed. Parasitic insects and a fungus have been introduced into the gypsy moth population in an effort to keep it at tolerable levels. In 1996 the gypsy moth fungus disease was very effective in keeping numbers of the insect in check in some areas of the watershed.