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Cypress and Tupelo Management for Bear Habitat
Management Considerations
Management of cypress and tupelo stands is integral to the
restoration of the Louisiana black bear. These stands are generally
found in close proximity to bodies of water. Bears use this habitat
type primarily for escape cover and denning sites. When the FWS
formally listed the Louisiana black bear as threatened, cypress and
tupelo were afforded special protection due to the importance of
those trees as bear denning sites. All cypress and tupelo adjacent to
water that are 36 inches dbh (diameter at breast height) or larger,
with visible signs of defects (i.e. cavities, broken tops), must be
protected.
Regeneration/Management
Management of cypress and tupelo stands is similar with a few
minor differences. Regeneration is generally from stump sprouts of
trees up to 14” dbh if sufficient sunlight is available. Usually
tupelo sprouts at higher rates than cypress, so care must be taken to
prevent harvested stands from becoming dominated by tupelo. Because a
large amount of sunlight is needed to stimulate stump sprouting and
sprout survival, harvesting these stands is the preferred method of
regeneration.
Regeneration from seed is usually more complex.
Both species produce adequate to excellent seed crops yearly, with
abundant crops every 3-5 years. Tupelo is the most consistent and
prolific of the two species. Cypress needs exposed wet soil for
germination and continued moisture for about 2-3 years for seedlings
to become established.
Flooding is a constant threat to first
year seedlings. Seedlings from either species will experience early
mortality if they are submerged for any length of time during the
first growing season. Once established, growth is vigorous during the
early years. Depending upon site quality, marketability for mulch is
usually reached within 20 years and timber production within 80
years.
Special Considerations
Vigorous growth in dense stands causes pruning to occur early on,
producing good quality bole development. Thinning should begin by age
20 if markets are available. Thinning to 70 to 80 trees per acre will
maintain high rates of growth and bole quality. Subsequent thinnings
should be conducted at 10 year intervals to remove poor quality
stems.
Natural stands where little information is known
concerning age and growth can be maintained at higher stand densities
than artificially regenerated stands. Natural stands may be
maintained with few or no harvests until the trees reach targeted
size. For periodic income from these natural stands and to shorten
the time to reach a desired diameter, selective harvests may be done,
removing the poorer quality trees and maintaining a density of 70-100
trees per acre.
Retention of small isolated groups and
individual trees of cypress or tupelo within other stands of
bottomland hardwoods can benefit bears. When harvesting for
regeneration purposes, consideration should be given to these
isolated stands or individuals to promote regeneration and provide
escape for bears. In areas where water is present much of the year
(e.g., Lower Atchafalaya), careful consideration should be taken when
the decision to harvest is made. Removal of all trees in permanently
flooded areas will almost inevitably lead to conversion of forested
wetlands to open water because regeneration is hindered by the
constant presence of water.
When managing stands of tupelo and
cypress in occupied bear habitat, trees with visible cavities or
defects in the top or bole should be excluded from the harvest and
protected from logging damage. Bears will select these trees for
denning sites and escape cover.
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