Effects of Thinning on Small Mammals in Oregon Coastal Forests

Suzuki, Nobuya; Hayes, John P.

doi:10.2307/3802777

Cited by 74 publications

(63 citation statements)

References 49 publications

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“…In the southern Washington Cascades, small experimental canopy gaps had positive influences on most forest species, likely reflecting an increase in low vegetative cover (Gitzen and West 2002). In contrast, red-backed voles (M. californicus and Myodes gapperi) generally decline following thinning treatments (Suzuki and Hayes 2003;Gitzen et al 2007;Sullivan et al 2008;Ransome et al 2009). Chipmunks often respond positively to thinning (Carey 2001;Carey and Wilson 2001), likely reflecting increased shrub development and associated cover and food.…”

Section: Discussionmentioning

confidence: 99%

Spatial Organization of Northern Flying Squirrels,Glaucomys sabrinus: Territoriality in Females?

Smith

Vuren

Kelt

et al. 2011

Western North American Naturalist

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Section: Discussionmentioning

confidence: 99%

Spatial Organization of Northern Flying Squirrels,Glaucomys sabrinus: Territoriality in Females?

Smith

Vuren

Kelt

et al. 2011

Western North American Naturalist

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“…This is supported by research on thinning that was often less intensive than commercial thinning prescriptions. This research showed negative impacts on spotted owls or their prey, as summarized in our introduction (Waters and Zabel 1995, Waters et al 2000, Carey 2001, Ransome and Sullivan 2002, Gomez et al 2003, Suzuki and Hayes 2003, Ransome et al 2004, Bull et al 2004, Lehmkuhl et al 2006, Meyer et al 2007, Wilson 2010, Holloway and Smith 2011, Manning et al 2012, and how spotted owls have been displaced by even very limited amounts of thinning or contemporary harvest near the nest or activity center (Forsman et al 1984, King 1993, Hicks et al 1999, Meiman et al 2003, Seamans and Gutiérrez 2007. Even if adverse impacts were quite modest, the amount of dense, late-successional forest that might be prevented from experiencing high-severity fire is so much smaller than the area that would be treated in an effort to accomplish this reduction in fire, that the net impact of the thinning would still be much greater.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, openings between trees from thinning may create barriers, due to predator avoidance, for flying squirrels to cross using its gliding locomotion (Manning et al 2012). Thinning has also been found to have negative effects on the abundance of other main prey species for Northern Spotted Owls such as red-backed voles (Myodes californicus) (Suzuki and Hayes 2003) and woodrats (Neotoma cinerea, N. fuscipes) (Lehmkuhl et al 2006). …”

Section: Introductionmentioning

confidence: 99%

Effects of Fire and Commercial Thinning on Future Habitat of the Northern Spotted Owl

Odion¹,

Hanson²,

DellaSala³

et al. 2014

TOORTHJ

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Abstract:The Northern Spotted Owl (Strix occidentalis caurina) is an emblematic, threatened raptor associated with dense, late-successional forests in the Pacific Northwest, USA. Concerns over high-severity fire and reduced timber harvesting have led to programs to commercially thin forests, and this may occur within habitat designated as "critical" for spotted owls. However, thinning is only allowed under the U.S. Government spotted owl guidelines if the long-term benefits clearly outweigh adverse impacts. This possibility remains uncertain. Adverse impacts from commercial thinning may be caused by removal of key habitat elements and creation of forests that are more open than those likely to be occupied by spotted owls. Benefits of thinning may accrue through reduction in high-severity fire, yet whether the firereduction benefits accrue faster than the adverse impacts of reduced late-successional habitat from thinning remains an untested hypothesis. We found that rotations of severe fire (the time required for high-severity fire to burn an area equal to the area of interest once) in spotted owl habitat since 1996, the earliest date we could use, were 362 and 913 years for the two regions of interest: the Klamath and dry Cascades. Using empirical data, we calculated the future amount of spotted owl habitat that may be maintained with these rates of high-severity fire and ongoing forest regrowth rates with and without commercial thinning. Over 40 years, habitat loss would be far greater than with no thinning because, under a "best case" scenario, thinning reduced 3.4 and 6.0 times more dense, late-successional forest than it prevented from burning in high-severity fire in the Klamath and dry Cascades, respectively. Even if rates of fire increase substantially, the requirement that the long-term benefits of commercial thinning clearly outweigh adverse impacts is not attainable with commercial thinning in spotted owl habitat. It is also becoming increasingly recognized that exclusion of high-severity fire may not benefit spotted owls in areas where owls evolved with reoccurring fires in the landscape.

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“…Given the many landowners on the peninsula, increasing habitat quality and connectivity will require collaboration with neighbors about where to apply treatments to benefit Thinning can reduce habitat quality and suitability for certain species that prefer dense forest conditions typical of the stem exclusion phase of forest succession (Hagar et al 1996, Suzuki and Hayes 2003. However, thinning in structurally simple young-growth forests can also improve habitat quality and suitability for a variety of other species by promoting tree growth, species and structural diversity, and understory development (Carey and Wilson 2001, Hagar et al 1996, Suzuki and Hayes 2003.…”

Section: Adaptation Strategies and Actions For Wildlife And Habitat Mmentioning

confidence: 99%

Adapting to climate change at Olympic National Forest and Olympic National Park

Halofsky¹,

Peterson²,

O’Halloran³

et al. 2011

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Climate change presents a major challenge to natural resource managers both because of the magnitude of potential effects of climate change on ecosystem structure, processes, and function, and because of the uncertainty associated with those potential ecological effects.Concrete ways to adapt to climate change are needed to help natural resource managers take the first steps to incorporate climate change into management and take advantage of opportunities to counteract the negative effects of climate change. We began a climate change adaptation case study at Olympic National Forest (ONF) in partnership with Olympic National Park (ONP) to determine how to adapt management of federal lands on the Olympic Peninsula, Washington, to climate change. The case study began in the summer of 2008 and continued for 1½ years. The case study process involved science-based sensitivity assessments, review of management activities and constraints, and adaptation workshops in each of four focus areas (hydrology and roads, fish, vegetation, and wildlife). The process produced adaptation options for ONF and ONP, and illustrated the utility of place-based vulnerability assessment and science-management workshops in adapting to climate change. The case study process provides an example for other national forests, national parks, and natural resource agencies of how federal land management units can collaborate in the initial stages of climate change adaptation. Many of the ideas generated through this process can potentially be applied in other locations and in other agencies.Keywords: Adaptation, climate change, fish habitat management, hydrology, road management, science-management partnerships, vegetation management, wildlife habitat management.iv SummaryIn this report, we describe results of the Olympic Climate Change Case Study, a sciencemanagement collaboration initiated to develop climate change adaptation strategies and actions for Olympic National Forest (ONF) and Olympic National Park (ONP). The case study was one of three parallel climate change adaptation case studies on national forests and adjacent national parks in the Western United States as a part of a larger effort, the WestWide Climate Initiative. This initiative was created by scientists of the U.S. Forest Service to address the urgent need to communicate climate change information to land managers and work with them to develop adaptation options.For the Olympic Climate Change Case Study, we conducted a vulnerability assessment to facilitate development of adaptation strategies and actions for ONF and ONP. The first step in the vulnerability assessment process involved a review of available climate model projections to determine likely levels of exposure to climate change (degree of deviation in temperature and precipitation) on the Olympic Peninsula (chapter 3). In the next step, we reviewed relevant literature on effects of climate change and available projections to identify likely climate change sensitivities in each of four focus areas on the Olympic Peninsu...

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Effects of Thinning on Small Mammals in Oregon Coastal Forests

Cited by 74 publications

References 49 publications

Spatial Organization of Northern Flying Squirrels,Glaucomys sabrinus: Territoriality in Females?

Spatial Organization of Northern Flying Squirrels,Glaucomys sabrinus: Territoriality in Females?

Effects of Fire and Commercial Thinning on Future Habitat of the Northern Spotted Owl

Adapting to climate change at Olympic National Forest and Olympic National Park

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