Winter and Early Spring Bird Communities in Grasslands, Shrubsteppe, and Juniper Woodlands in Central Oregon

Reinkensmeyer, Daniel P.; Miller, Richard F.; Anthony, Robert G.; Marr, Vern E.; Duncan, Corinne M.

doi:10.3398/1527-0904(2008)68[25:waesbc]2.0.co;2

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Different shrub species and growth forms provide different habitat structures (reviewed by Holmes [2000] andVander Haegen et al [2001]). For example, horned larks are associated with grassland conditions, sage sparrows (Amphispiza belli Cassin) with shrub-steppe, and Townsend's solitaire (Myadestes townsendi Audubon) with juniper woodlands (Reinkensmeyer et al 2008).…”

Section: Description-mentioning

confidence: 99%

Climate change vulnerability and adaptation in south-central Oregon

Halofsky¹,

Peterson²,

Ho³

2019

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In accordance with Federal civil rights law and U.S. Department of Agriculture (USDA) civil rights regulations and policies, the USDA, its Agencies, offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, family/parental status, income derived from a public assistance program, political beliefs, or reprisal or retaliation for prior civil rights activity, in any program or activity conducted or funded by USDA (not all bases apply to all programs). Remedies and complaint filing deadlines vary by program or incident.Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the responsible Agency or USDA's TARGET Center at (202) 720-2600 (voice and TTY) or contact USDA through the Federal Relay Service at (800) 877-8339. Additionally, program information may be made available in languages other than English.To file a program discrimination complaint, complete the USDA Program Discrimination

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Section: Description-mentioning

confidence: 99%

Climate change vulnerability and adaptation in south-central Oregon

Halofsky¹,

Peterson²,

Ho³

2019

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“…Numerous studies have evaluated effects of plant succession on diversity and abundance of wildlife populations in forests, shrublands, and grasslands (Wiens and Rotenberry 1985, Bock and Bock 1992, Oliver et al 1998, Knick et al 2005. Wales et al (2006) examined how large herbivores facilitate transitions among states containing large trees in northeast Oregon, and Reinkensmeyer et al (2007Reinkensmeyer et al ( , 2008 evaluated the change in avian populations along a successional gradient from grassland to old-growth woodland. Bird populations have also been compared across 2 states that resulted from wildfire, grazing, or spraying (Wiens andRotenberry 1985, Bock andBock 1992).…”

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confidence: 99%

State‐and‐Transition Models for Assessing Grasshopper Sparrow Habitat Use

Holmes

Miller

2010

J Wildl Manag

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The combination of ecological site descriptions and state‐and‐transition models (STMs) describes potential vegetation, plant composition, and plant community dynamics and thus can be used to classify and understand dynamics of wildlife habitats across landscapes or home ranges. Numerous studies have evaluated effects of plant community dynamics on diversity and abundance of wildlife populations, but we could find no studies that examined changes in wildlife populations with respect to STMs. We compared abundance of grasshopper sparrows (Ammodramus savannarum) across 5 community phases representing 2 different ecological states in the Columbia Basin, Oregon, USA, to evaluate utility of STMs for understanding and predicting potential changes in habitat use by wildlife species. We measured grasshopper sparrow abundance in 165 100‐m fixed‐radius point counts distributed across 17 study plots within 5 plant community phases: native perennial grassland, sagebrush‐steppe, depleted sagebrush‐steppe, sagebrush‐steppe with an annual grass understory, and annual grassland. We used a general estimating equation with a Poisson distribution to model relative abundance and estimate differences in this abundance index between linked pairs of community phases. Grasshopper sparrows showed clear differences in abundance among community phases and were most numerous in perennial grasslands and least abundant in depleted sagebrush and sagebrush annual grass community phases. As a management tool, STM provides information that predicts the direct and indirect cumulative impacts of various management actions on vegetation composition and structure (and thus habitat). Ecological site descriptions and STMs enable land managers and scientists to assess potential and current wildlife habitat suitability and to predict potential response of wildlife populations to vegetation dynamics based on the ecological potential of the site.

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Fire mediated patterns of population densities in mountain big sagebrush bird communities

Holmes

Robinson

2013

J Wildl Manag

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We employed a chronosequence approach to evaluate patterns of bird abundance in relation to post‐fire vegetation recovery in mountain big sagebrush (Artemisia tridentata vaseyana). We estimated population density for 12 species of birds within the perimeters of 4 fires that had undergone 8–20 years of vegetation recovery and on adjacent unburned areas in the northwestern Great Basin, USA. Six species showed negative responses to fire persisting up to 20 years. Two species showed positive responses with effects persisting for <20 years. Understory vegetation was similar between burned and unburned areas irrespective of recovery time, and shrub canopy cover was similar between burned and unburned sites after 20 years of recovery. Persistent reductions in bird densities lead us to conclude that shrub canopy cover alone is not a sufficient metric for predicting recovery of songbird abundances following disturbance in mountain big sagebrush. © 2013 The Wildlife Society.

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Winter and Early Spring Bird Communities in Grasslands, Shrubsteppe, and Juniper Woodlands in Central Oregon

Cited by 5 publications

References 26 publications

Climate change vulnerability and adaptation in south-central Oregon

Climate change vulnerability and adaptation in south-central Oregon

State‐and‐Transition Models for Assessing Grasshopper Sparrow Habitat Use

Fire mediated patterns of population densities in mountain big sagebrush bird communities

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