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Forest Management

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Bottomland Hardwood Timber Management
Canebreak Management
Upland Pike Management
Upland Mixed Pine/Hardwood Management
Cypress/Tupelo Management

Bottomland Hardwood Timber Management
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I. Management Considerations

Large tracts of naturally-occurring mature bottomland hardwood forest, composed of a mix of tree species, will provide for black bear needs without intensive management. For example, natural disturbance in the form of tree falls and wind storms typically provide sufficient forest openings needed for forage production and cover. The first choice for naturally occurring bottomland hardwood stands is to leave these stands unmanaged. However, if habitat conditions are inappropriate or if a landowner’s objective is to harvest timber products from the land for income, the following recommendations should be considered.

It is important to maintain a diverse bottomland hardwood forest of maximum growing vigor. From a bear habitat standpoint, a productive forest stimulates yield from hard mast (e.g., oak, pecan, hickory) and soft mast (e.g., blackgum, wild grape, blackberry) producing trees and vegetation that maintains a diversity of animal foods. Black bears depend largely on fall and early winter mast crops to provide enough fat reserves to survive winter dormancy. Management of a timber stand for oaks and other hard mast producing species is good for production of high quality hardwood timber and optimum black bear foraging habitat. Maximizing tree vigor and hard mast production will benefit bears as well as all other wildlife species that depend on this carbohydrate-rich food source. Maintaining a diversity of age classes, stand types, and vegetative composition within the forest will provide excellent habitat conditions for black bears. Rotation length for crop trees should be a minimum of 50 years, with 70-100 years preferred for hard mast production.

Intermediate cuts (or stand thinnings) should be designed to improve species composition, remove individual trees of poor quality or vigor, promote regeneration of desirable timber species, encourage food production and create escape and nesting cover for bears and a variety of other wildlife species. Stand thinnings should be made when it is economically and silviculturally feasible, preferably with 5 to 15 year intervals. Although regular thinnings are compatible with maintenance of suitable black bear habitat, cuts should carefully consider protection of existing and potential den trees (see III. Special Considerations). Mid-story timber stand improvement (TSI) can be accomplished in such a manner as to remove less desirable non-commercial species (e.g., American hornbeam, box elder, eastern hop hornbeam) while encouraging those desirable to bears (e.g., mulberry, swamp dogwood, spicebush). Diameter-limit harvest (or high-grading) should be avoided as this may lead to a change in stand composition detrimental to bear habitat and timber stand quality over a long rotation period. When feasible, logging slash and tops should be left for bedding areas and for foraging sites for insects, invertebrates, amphibians, reptiles and small mammals. Deadfall trees should also be left undisturbed for foraging sites for insects.

II. Regeneration/Management

Natural regeneration of key species such as hard mast producers can be achieved through planned silvicultural management operations. Natural regeneration through group selection or small patch removals will enhance regeneration of shade intolerant species such as oaks. Early successional food plants (e.g., dewberry, blackberry, elderberry, pokeberry) also benefit from these harvest practices that allow sunlight to penetrate to the forest floor. In intensive short rotation hardwood plantations, use coppice (or stump sprout) regeneration when feasible to regenerate within one year of harvesting. Where feasible, land managers can intercrop with grains (soybeans, wheat) for at least the first year.

III. Special Considerations

Forest management practices in natural stands should incorporate guidelines to insure that several trees 30” dbh or greater are present on each tract or management unit. This will insure large trees are available for avenues of escape and security for mother and cubs and provide for future den trees in the stand. Females with cubs typically select the base of the largest tree in the vicinity for their daybed site. Leaving a few clumps of large standing trees in each compartment will increase use of these areas by mother bears.

Key Bottomland Hardwood Plant Species

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Canebreak Management

I. Management Considerations

     Canebreaks historically were associated with Louisiana black bear habitat. Extensive stands of switchcane provide habitat diversity, cover, and a seasonal food supply for many wildlife species, including deer, rabbits, and black bears. Less abundant than in the past, switchcane habitat should be favored in hardwood forest stands when managing for the Louisiana black bear.

II. Regeneration/Management

     On selected areas where lack of cover is deemed to be a limiting factor, natural regeneration of existing stands of cane should be encouraged to expand through the removal of overstory trees and clearing of competing vegetation. On suitable sites, especially abandoned agricultural fields, public transportation and utility rights-of-way, opportunities exist for artificial regeneration of switchcane. If seed is available, direct seeding is the favored method of propagation. Another effective method of artificial regeneration, although potentially labor intensive, involves rhizome transplanting with and without attached culms.

III. Special considerations

     Switchcane life history traits, including its periodic seeding events and its susceptibility to decline from frequent prescribed burns, intensive cattle grazing, and agricultural clearing, justify special management procedures for expansion of this habitat type. Areas with existing stands of switchcane deserve protective measures to conserve this valuable component of quality black bear habitat. Several hardwood seedling nurseries in Louisiana are attempting to grow switchcane for use in habitat restoration efforts.

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Upland Pine Management

I. Management Considerations

     When upland areas are managed intensively for pine production, managers typically use an even-aged management strategy for regeneration of pine stands. Even-aged silvicultural activities include two basic methods: 1) leaving seed trees for natural regeneration, and 2) harvest cuts with some form of site preparation for artificial regeneration through seedling planting.

II. Regeneration/Management

     To create high quality bear habitat, harvest should maximize forest age and type diversity. Harvest shape should maximize edge habitat by using irregularly shaped cuts where feasible based on site topography. To create maximum between-stand diversity, there should be at least 7 years difference in age classes between adjacent regeneration areas. High between-stand diversity will help ensure a constant supply of soft mast within a relatively small area.
     Even-aged pine stands should be thinned as soon as economically feasible (typically by 15 years). This practice will produce a more vigorous pine stand as well as allow sunlight to penetrate to the forest floor and encourage soft mast production and growth of vigorous herbaceous vegetation.

III. Special Considerations

     Fire in the upland pine ecosystem is a natural occurrence. Burning in pine stands should be conducted on a 3 to 5 year rotation depending on site condition. If adult female bears are known to be in the area, use caution when burning in winter during the first 5 years after initial harvest. Burning during this time period may disturb bears denning in this thick, early successional cover. Poor soils and dry sites should be burned less often. Planted pine stands should be burned as soon as practical (7 to 10 years after establishment) and after intermediate thinnings. Contact your state forestry agency about timing of burns, the possibility for technical or financial assistance, and liability issues surrounding this practice. Hardwood areas and Streamside Management Zones (SMZs) should always be protected from fire.

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Upland Mixed Pine-Hardwood Management

I. Management Considerations

     Upland sites where stands of timber are comprised of a mixture of pine and hardwood tend to be managed differently than pure pine stands. Several different types of hardwood trees (oak, cherry, hickory, sweetgum, beech) can be found intermixed with pine. The age classes of the trees may be the same or vary, depending on when previous cuttings took place and what was harvested. These stands can provide good habitat for black bears and still meet the landowner’s objectives.
     The biggest challenge in maintaining a mixed pine-hardwood site is managing the lower story of trees. The hardwood component of the stand is often made up of primarily shade tolerant trees that will respond to sunlight once the overstory is removed. However, pine seedlings that are released from the older, mature trees will usually grow faster than the hardwoods and will be the dominant species for several years. Since acorns and other hard mast provide bears with an important source of food in the fall, forest management activities should favor oaks or other hard mast species as the stand develops.

II. Regeneration/Management

     The removal of the overstory, and the timing of this operation, will determine which species of trees will become dominant as time passes. Harvesting of trees should result in openings large enough that soft mast will be produced and utilized by bears. Normally, groups of trees or “patches” of the overstory are removed, which produce the openings that are needed for soft mast food species (e.g., dewberry, pokeberry, blackberry, French mulberry) to have sufficient sunlight to grow. After a few years, these openings will become impenetrable thickets with many hardwood sprouts and pine seedlings growing vigorously. Although availability of natural foods declines over time as openings mature, bears will utilize those sites as denning areas because of the thick cover provided. Also, rotting logs, stumps, and logging slash from the harvest operation will provide good sources of grubs, insects and beetles.

III. Special Considerations

     If large openings are made at the time of harvest, the landowner should consider leaving some groups of large trees scattered across the tract for females with cubs to use as a means of escape. Also, trees with cavities should be maintained for den sites.

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Cypress Tupelo Management

I. 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.

II. 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.

III. 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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 Site Revised June 27, 2005

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