10 per share within 24 months from the listing of Black Birch
Capital common shares on the TSX Venture Exchange.
, which is intermediate in shade tolerance and is often considered ecologically similar to yellow birch, exhibited little growth response to soil resource congruence.
The simulated blowdown in 1990 reduced the density of black birch canopy trees from 47.
Seed rain of black birch was only slightly more variable in the blowdown than the understory: coefficient of variation (CV) = 44%, 49%, 61%, and 42% along the north, central, south, and understory transects, respectively.
6% of the total k-value for black birch and yellow birch, respectively (Table 3).
Mortality rates on top sites were greater in yellow birch than in black birch, particularly during the first two years of the experiment [ILLUSTRATION FOR FIGURE 4 OMITTED].
Yellow birch: American birch Sweet birch: cherry and black birch
Paper birch: white and canoe birch
The black birch
is what gives us our yellow," she said while noting she feels the foliage season is getting off to a late start.
We have a tree here, a big black birch
," Trexler said.
At left, Thom Kyker-Snowman holds a black birch
that has flourished in the cut area.
Elisa Campbell of the Sierra Club said she is concerned that failure to maintain diversity of species through successful regeneration could result in the Quabbin watershed being dominated by white pine, black birch and red maple.
Black birch and red maple may be prolific, and quick to establish a foothold, but neither tree species is as long-lived as the majority of hardwoods and softwoods found in the Quabbin watershed.