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Author: Elva Manquera

Effects of restoration and fire on habitats and populations of western hummingbirds: A literature review

To inform future restoration efforts, we reviewed the known effects of fire and habitat management and restoration on hummingbirds in four key habitat types in North America. We examined seven species that most commonly occur west of the Rocky Mountains: Rufous (Selasphorus rufus), Calliope (Selasphorus calliope), Broad-tailed (Selasphorus platycercus), Costa’s (Calypte costae), Black-chinned (Archilochus alexandri), Anna’s (Calypte anna), and Allen’s (Selasphorus sasin). Our review found that most western hummingbird species respond positively to wild or prescribed fire in forested and chaparral habitats of the western United States, although some hummingbird occurrence declines following fire, possibly due to the loss of preferred nesting habitat in mature forests. Restoration practices that eradicate exotic plants, encourage the regeneration of native shrubs and flowering plants (especially understory vegetation), and promote early and mid-successional habitats connected with native stand trees will benefit hummingbirds by providing foraging habitat in migration and on breeding grounds. Restoration practices that encourage the regeneration of native shrubs, understory vegetation, and native epiphytes, while maintaining forest canopy, can also benefit hummingbirds. We also identify many critical research questions and needs which, if addressed, would improve the quantification of pre- and postfire and habitat management impacts on hummingbirds, especially Allen’s and Rufous populations, which are experiencing steep population declines.

Citation

Alexander, J. D.; Williams, E. J.; Gillespie, C. R.; Contreras-Martínez, S.; Finch, D. M. 2020. Effects of restoration and fire on habitats and populations of western hummingbirds: A literature review. Gen. Tech. Rep. RMRS-GTR-408. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 64 p.

You can download the full document here. 

PIF Plans for California

CalPIFlogo 600finalThe California Partners in Flight program has completed eight habitat and bioregion Bird Conservation Plans (BCP’s) for the State. The habitat BCPs include Riparian, Oak Woodlands, Coastal Scrub and Chaparral, Grasslands, Coniferous Forests, Sagebrush, and Desert. there is also a Sierra Nevada Bioregion BCP. Click here to access the plans.

These plans are dynamic documents that will follow a continuous process of developing and updating conservation recommendations for California’s habitats based on the latest scientific monitoring and research data. Combined with the associated CalPIF study areas database and focal species breeding status database, these plans provide a foundation for the adaptive conservation management of California’s diverse habitats.

International PIF Plans

The Partners in Flight Landbird Conservation Plan was revised in 2016. This plan documents the current widespread decline in landbird species throughout the U.S and Canada and presents prioritized related conservation objectives. Click here to read the 2016 Partners in Flight Landbird Conservation Plan. Saving Our Shared Birds: Partners in Flight Tri-National Vision for Landbird Conservation presents a comprehensive conservation assessment of landbirds in Canada, Mexico, and the continental United States. This tri-national vision highlights the vital links among North America’s migratory birds and the highly threatened resident species in Mexico. It points to a set of continent-scale actions necessary to maintain the landbird diversity and abundance that are our shared responsibility. Click here to read this Saving Our Shared Birds; Partners in Flight Tri-National Vision for Landbird Conservation.

Click here to explore the Partners in Flight resource library.

Using a Partners in Flight Plan

A Partners in Flight (PIF) plan can be used at any stage of land management. Based on your objective there are regional conservation plans and species-specific plans. Each plan varies based on the needs of the habitat or species and the available science.

In Oregon, Washington, and California regional landbird conservation plans complement the goals, objectives, and strategies in several other planning and conservation processes and initiatives by filling a niche that is usually absent in those efforts: quantitative, prescriptive recommendations for habitat conditions most suitable for individual and suites of landbird species at several geographic scales (e.g., regional, subregional, site). The use and implementation of these recommendations can be done independently for landbird-specific conservation, or complementarily within the context of broader conservation goals to support and strengthen other plans. The regional conservation plans are organized by geography and habitat type. There is a plan for your habitat in your geography.

Species-specific conservation plans can provide an overview of important conservation actions needed to address factors contributing to the decline. They can include a summary of the biological characteristics of the bird and the factors believed to be contributing to its decline, along with a list of critical activities needed for the conservation of that species. These plans are not as prolific as the regional conservation plans. You can find species-specific plans in the PIF resource library and on the Avian Knowledge Northwest website Conservation Assessments for Forest Service Region 6 Sensitive Species and Oregon/Washington Bureau of Land Management Special Status Species.

The Journey

PIF plans can be incorporated into the existing collaborative processes as highlighted in the Roadmap Concept. The PIF conservation planning process uses birds as indicators of habitat components and determines current and desired conditions, recommends prescription components, and implements monitoring to measure treatment effectiveness. Birds are considered excellent indicators of ecosystem health because they respond relatively quickly to habitat change, and individual focal species are sensitive to environmental variation at multiple trophic levels and multiple spatial scales. Focal species, at-risk birds, and climate knowledge can inform and evaluate restoration alternatives. Develop stand-scale prescriptions to achieve forest health and resiliency goals, and improve quality and complexity by applying avian science and planning tools.

During the project monitoring and research can be an integral part of the adaptive management process and will function to increase our knowledge base and provide scientific data to revise biological objectives as necessary and advance the effectiveness of conservation actions. After the treatments using habitat and population objectives, you can quantify success at site and landscape scales and apply lessons learned to the next planning cycle. On Avian Knowledge Northwest you can find PIF plans under resources and decision support tools.

To see a PIF plan in action check out Case Study: Adaptive Management.

Case Study: Adaptive Management

Oak Woodlands and Chaparral

Oak Chaparral located in the Rogue Valley. Picture taken by Jaime Stephens.

The Klamath Siskiyou Oak Network (KSON) applies an adaptive management approach to oak restoration implementation. The restoration discussed in this case study was in an oak woodland mosaic, unique to Southern Oregon, and includes patches of chaparral. Chaparral is a natural part of oak habitats, but it also poses a risk of spreading severe fire which can put large, old oak trees at risk. Because oak woodlands are threatened by loss and degradation, management initiatives sometimes reduce chaparral to reduce the risk of high-severity fires and promote a mix of low to moderate-severity fires. Restoring and managing oak woodland ecosystems in the Klamath-Siskiyou bioregion requires learning how best to achieve a balanced vegetation composition that includes chaparral habitat components.

Using Prairie, Oak, and Riparian Habitats of Western Oregon and Washington version 1.0 the focal species were identified for this project. These focal species provide a rapid assessment of overall management activities and a benchmark for oak habitat restoration goals. The information gathered from this study was added to version 2.0 of this Partners in Flight Plan and was developed into a decision support tool (DST).

California Towhee taken by Jim Livaudais

The Klamath Siskiyou Oak Network identified a research need to guide restoration practices to ensure a balance of fuel reduction and wildlife habitat objectives. A series of studies conducted at Upper and Lower Table Rocks near Medford Oregon, an area of critical environmental concern, found that chaparral-associated bird species did not establish territories in very small retained chaparral patches; patches larger than five acres were more likely to be used by birds during the breeding season.

Following recommendations from that research, restoration prescriptions retained chaparral patch sizes of five to twelve acres where possible, and placement of smaller patches near larger patches to ensure adequate habitat for chaparral-associated bird species. A follow-up study demonstrated the success of the adaptive management approach: all six chaparral-associated bird species established territories in the larger retained patches.

Adaptive management is only successful within a partnership when monitoring research is communicated to practitioners who then use the results of the research to modify their treatments and protocols. Within KSON for this project, those practitioners were the Bureau of Land Management, the Lomakatsi Restoration Project, and the Nature Conservancy.

 

Complementary Regional Conservation Plans

The Population and habitat objectives for landbirds in prairie, oak, and riparian habitats of western Oregon and Washington plan are intended to complement the goals, objectives, and strategies in several other planning and conservation processes and initiatives by filling a niche that is usually absent in those efforts: quantitative, prescriptive recommendations for habitat conditions most suitable for individual and suites of landbird species at several geographic scales (e.g., regional, subregional, site). The use and implementation of these recommendations can be done independently for landbird-specific conservation, or complementarily within the context of broader conservation goals to support and strengthen other plans.

Examples of other efforts that apply to multiple ecoregions within this document include:

Puget Lowlands Ecoregion Specific:

Willamette Valley Ecoregion Specific:

Klamath Mountain Ecoregion:

Rufous Hummingbird

Forest condition: Unique Forest Habitat
Habitat Attribute: Nectar-Producing Plants

Habitat Objectives
Sites: Where ecologically appropriate in any forest stage or condition provide >20% of the shrub/herbaceous understory cover as nectar-producing plants (e.g., salmonberry, rhododendron, currant).

Habitat Conservation Strategies

  • Allow unmanaged early-successional habitat to regenerate naturally, particularly where there is the potential for a well-developed deciduous component of flower (nectar) producing plants.
  • Retain and/or plant flower (nectar) producing shrubs and trees such as salmonberry, currant, and snowbrush, and herbaceous plants such as penstemon, columbine, and paintbrush
  • Maintain deciduous vegetation in areas where conifer seedlings are not planted or difficult to establish such as along logging roads and landings: on unstable, steep slopes; and in moist depressions, gullies, and stream courses.
  • Where vegetation management is conducted, use selective control of deciduous vegetation (e.g., immediately adjacent to conifer seedlings) by manual thinning or limited herbicide application.
  • Where vegetation management is being conducted, retain small, untreated patchily distributed plots (e.g., 0.1 ha, Marcot [1984]; 10 x 20 m, Morrison [1982]) of deciduous vegetation throughout the conifer plantation.
  • Discontinue use of herbicides for deciduous tree and shrub control for species associated with early-successional deciduous shrub-layer vegetation.
  • Lengthen time in early-successional condition by planting a lower density of conifers in conjunction with limited or no competing vegetation management.
  • Harvest entries should be carefully designed, and logging systems tailored to site-specific conditions to minimize ground disturbance and site productivity.
  • Beneath transmission powerlines where vegetation is maintained at shrub/sapling heights, selectively retain flower and nectar producing shrubs and trees.

Cited Plan

Altman, B. and J.D. Alexander. 2012. Habitat conservation for landbirds in coniferous forests of western Oregon and Washington. Version 2.0. Oregon-Washington Partners in Flight (www.orwapif.org) and American Bird Conservancy and Klamath Bird Observatory.

Lazuli Bunting

Habitat: Oak Savannah or Open Woodland

Habitat Attribute: moderate and patchy shrub cover

Habitat Objectives (Sites):
Oak Savannah or Open Woodland in the following conditions:

  • canopy cover <40%
  • shrub cover 20-50% with an interspersion of herbaceous areas

Population Objectives (Sites):

Target Densities in Suitable Habitat:

Puget Lowlands:
South: >0.10 birds/ha (>0.04 birds/ac)

Willamette Valley:
North: >0.13 birds/ha (>0.05 birds/ac)
South: >0.22 birds/ha (>0.09 birds/ac)

Klamath Mountains:
Umpqua: >0.65 birds/ha (>0.26 birds/ac)
Rogue: >0.60 birds/ha (>0.24 birds/ac)

Cited Plan

Rockwell, S. M., J. L. Stephens, and B. Altman. 2022. Population and habitat objectives for landbirds in prairie, oak, and riparian habitats of western Oregon and Washington. Version 2.0. Prepared for Oregon-Washington Partners in Flight, Pacific Birds Habitat Joint Venture, Bureau of Land Management, and U.S. Forest Service. Klamath Bird Observatory, Ashland, OR, and American Bird Conservancy, Corvallis, OR.

Purple Finch

Habitat: Oak Closed Woodland and Forest
Habitat Attribute: moderate to high canopy and subcanopy cover

Population Objectives (Sites)
Target Densities in Suitable Habitat:

Puget Lowlands:
North: >0.09 birds/ha (>0.04 birds/ac)
South: >0.42 birds/ha (>0.17 birds/ac)

Willamette Valley:
North: >0.35 birds/ha (>0.14 birds/ac)
South: >0.10 birds/ha (>0.04 birds/ac)

Klamath Mountains:
Umpqua: >0.02 birds/ha (>0.01 birds/ac)
Rogue: >0.08 birds/ha (>0.03 birds/ac)

Habitat Objectives (Sites)
Oak Closed Woodland or Forest in the following conditions:

  • canopy cover >40%
  • subcanopy cover >20%
  • shrub cover <50%
  • mean tree DBH >30 cm (12 in)
  • patches >10 ha (25 ac)

Cited Plan

Rockwell, S. M., J. L. Stephens, and B. Altman. 2022. Population and habitat objectives for landbirds in prairie, oak, and riparian habitats of western Oregon and Washington. Version 2.0. Prepared for Oregon-Washington Partners in Flight, Pacific Birds Habitat Joint Venture, Bureau of Land Management, and U.S. Forest Service. Klamath Bird Observatory, Ashland, OR, and American Bird Conservancy, Corvallis, OR.