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New Hampshire Audubon is creating resilient habitat conditions for birds and other wildlife in the face of climate change by promoting diverse age classes and future climate-adapted tree species, creating early successional habitat, and delineating legacy areas to develop old forest characteristics.

Willard Pond is expected to see more days of extreme heat, shorter winters, and increases in invasive species in the near future. To address these stressors, New Hampshire Audubon is delineating harvest areas and legacy reserve areas to increase avian species habitat variance and tree and shrub structural diversity in order to maintain forest health and improve long-term forest resilience. These tactics will enable their forests to provide habitat for many taxa, including early-successional and interior forest-dwelling bird species.

Project Area

Map of Willard Pond forest management units
At about 1,800 acres, Willard Pond Wildlife Sanctuary is New Hampshire Audubon’s largest property. The Sanctuary is composed of a diverse topographic arrangement of northern hardwood-pine forests, perched hemlock stands, and red maple wetland forests across a mountainous landscape of moderate-to-steep slopes. The landscape features ridge-top balds, boulder fields, and many perennial streams and vernal pools. Other outstanding features include Willard Pond, a pristine water body of about 100 acres that is home to nesting loons and supports a vigorous natural aquatic fishery that allows fly fishing only. Habitat surrounding the pond supports over 120 plant species, 18 amphibians, 10 reptiles, 50 mammals, and 136 bird species.

The summits of Bald Mountain and Goodhue Hill, huge glacial boulders, and an abundance of wildlife across the sanctuary can be viewed from trails that support passive recreation. Across the property there is historical evidence of colonial land use including stone walls, apple orchards, and open-grown wolf trees within second-growth forest recovering from use as agricultural pastures in the late 1800s and early 1900s. At the landscape scale, the Sanctuary is situated in the middle of a 10,000+-acre “super sanctuary” of conserved lands in the south-central part of New Hampshire.

In 2012 and 2013, approximately 200 acres of the preserve harvested using group selection to remove both mature and poor quality trees. White pine, red maples and white birch were harvested with crop tree release planned for mostly hardwoods (red oak, sugar maple, yellow birch and white ash). Snag were created and downed-log and large mast-producing trees were retained throughout the harvest areas. About 6.3 acres was clearcut near Goodhue Hill to create a small area of young higher elevation forest for wildlife improvement and early successional plant and animal species.

Management Goals

Management goals for this project include assessing previously harvested areas for re-entry and creating another ridgetop early successional habitat atop Goodhue Hill with an eye towards wildlife habitat and climate resiliency. Other specific goals and objectives include:

Increase forest health and diversity of desired species to enhance habitat conditions for birds and other wildlife.

  • Increase desired species recruitment and health (red oak, yellow birch, sugar maple, black cherry).
  • Maintain water quality using best management practices.
  • Inventory, map, and reduce current invasive plant species presence. Map and rapidly respond to new detections of invasive species.

Create and maintain structural diversity to support nesting success for declining forest birds, including creating early and mid-successional habitat, and passively managing areas with late-successional habitat.

  • Inventory and assess previously-harvested areas (200+ acres)  for indicators of forest health and desired species recruitment.
  • Assess and compare bird species diversity in the harvested area by use of automatic recording devices. 
  • Plan 3 additional harvest areas totaling 150 acres to create different habitat structure and diverse successional stages, including 2 5-10 acre patches for early successional habitat.

Support blight-resistant American Chestnut reintroduction through plantings of blight-resistant seeds, seedlings, and saplings when they become available. 

  • Plant 50-100 seeds or seedlings per year for the next 10 years in areas with ideal site conditions.

Climate Change Impacts

For this project, the most important anticipated climate change impacts include:
Many invasive plants , including multi-flora rose, Asiatic bittersweet, Morrow’s Honeysuckle, Japanese Knotweed and Japanese barberry will increase in extent or abundance.
Warmer temperatures and altered precipitation will interact to change soil moisture patterns throughout the year, with the potential for both wetter and drier conditions depending on the location, aspect, soil composition and season.
Intense precipitation events will continue to become more frequent in the Northeast.
The winter season will be shorter and milder, generally leading to less precipitation falling as snow and reduced snow coverage and retention throughout the season.
Certain insect pests and pathogens (e.g., hemlock wooly adelgid, emerald ash borer, beech blight) will increase in occurrence or become more damaging in New England.
Forest composition will change across the landscape in New England.
These impacts to forest ecosystems may have cascading effects on wildlife species dynamics.

Challenges and Opportunities

Climate change will present challenges and opportunities for accomplishing the management objectives of this project, including:

Challenges

Phenological shifts of ground nesting birds, stochastic weather patterns, and altered precipitation regimes may shift operable harvest windows.
Increases in invasive species and phenological shifts could decrease the growth and fecundity of desired species and result in less species and structural diversity on site.
Decreases in soil moisture and extreme weather events could cause increased tree damage, mortality, blow downs affecting the ability to retain legacy trees.
Warmer winters and more days with extreme heat pose uncertainty for the health of avian and aquatic species and tree species.
Predicted declines in softwood species and increases invasive species will make it more difficult to maintain diverse forest conditions
Changes in phenology due to climate change could have cascading effects on species interactions and disrupt ecosystem processes (birds, insects, native plant fecundity, etc).
Increased invasive species and deer herbivory could decrease the rate of mast production.

Opportunities

Disturbances due to climate change may result in an increased edge effect that provides habitat for species including Scarlet Tanagers, Prairie Warblers, Indigo Buntings, Chestnut-sided Warblers, Eastern King Birds, Eastern Towhees, and Whippoorwills.
More frequent periods of drought could present new harvest windows.
A warmer climate may support increased recruitment of oak and sugar maple; and a longer growing season overall this could result in more moose and bear.
Introduction or promotion of berry- and nut-producing shrubs and trees may create supportive habitat structures and sustenance for expanding faunal species diversity due to range shifts.

Adaptation Actions

Project participants used the Adaptation Workbook to develop several adaptation actions for this project, including:

Area/Topic
Approach
Tactics
Forest ecosystems
Delineate non-management areas including wetlands, steep slopes, and legacy areas with mature/old growth forest characteristics.
Use a combination of thinning, group selection, and clearcuts at ridge top area.
Introduce American chestnut and oak by planting seedlings; Showcase this tactic specifically for broader public demonstrations and communication about climate adaptation and forestry.
Promote berry- and nut-producing shrubs in early successional and open woodland areas (e.g., huckleberry, red osier dogwood, hazelnut, etc.).
Build bridges to improve road/forestry access to treatments sites and reduce soil erosion by choosing appropriate seasonality for harvest.
Choosing sites which have lower exposure to catastrophic storm events will be more effective to protect both soil, wetland and forest resources.
Retain no-cut areas or legacy trees as low impact actions to improve forest health.

Monitoring

Project participants identified several monitoring items that could help inform future management, including:
Nesting surveys of key bird species (presence/absence) pre- and post-implementation using remote listening and recording devices. Key species include whippoorwill and prairie warbler.
Change in basal area and stock density 5 years post-harvest using permanent photo points and quantitative monitoring.
Recruitment success of target native and climate-adapted species 5 and 10 years post-harvest (oak, American chestnut, yellow birch, black birch).
Map locations of invasive species using presence/absence surveys 5 and 10 years post-harvest.

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