Mountain goat abundance and population trends in the Olympic Mountains, Washington, 2011

Jenkins, Kurt J.; Happe, Patricia J.; Griffin, Paul C.; Beirne, Katherine; Hoffman, Roger A.; Baccus, William

doi:10.3133/ofr20111313

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Therefore, direct anthropogenic impacts are assumed to be minimal. Grazing pressure and disturbance from introduced mountain goats ( Oreamnos americanus Blainville, 1816) pose an increasing impact to high elevation plant communities in the Olympic Mountains ( Houston et al 1994 , Jenkins et al 2012 ), and goats were observed in the vicinity of populations of S. basaltica on Mt. Angeles during the visit in 2016; however, no evidence of direct grazing or damage to S. basaltica was detected.…”

Section: Resultsmentioning

confidence: 99%

Two new species of Sabulina (Caryophyllaceae) from Washington State, U.S.A.

Legler

Dillenberger

2017

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Sabulina basaltica and Sabulina sororia (Caryophyllaceae) are described as new species endemic to Washington State, U.S.A. Sabulina basaltica is restricted to high-elevation, basalt rocks in the northeastern Olympic Mountains, and Sabulina sororia to high-elevation, dunite rocks of the Twin Sisters Range in the North Cascade Mountains. Both were previously confused with Sabulina rossii (formerly called Arenaria rossii or Minuartia rossii). Their recognition as distinct species is supported by morphological and molecular characters and disjunct geographic distributions. Both are illustrated, mapped and compared to related species. We also present a molecular phylogeny of Sabulina based on nuclear ITS and plastid trnQ-rps16 DNA with increased sampling of North American taxa. The phylogeny resolves a single clade containing all glabrous, perennial, North American Sabulina taxa including Sabulina rossii and both of the new species.

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Section: Resultsmentioning

confidence: 99%

Two new species of Sabulina (Caryophyllaceae) from Washington State, U.S.A.

Legler

Dillenberger

2017

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Reconstructing mountain goat history in the Olympic Mountains, USA

Oscarson,

Landguth,

Wallin

2024

Population Ecology

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Between 1925 and 1930, 11 or 12 non‐native mountain goats (Oreamnos americanus) were translocated from Alaska and British Columbia to the foothills of the Olympic Range. By 1970, descendants of these goats had colonized the entire range and concerns about the management of this introduced species developed as damage to alpine soil and vegetation occurred. A series of removals reduced the population from 1175 in 1983 to 389 by 1990, eventually growing to 584 in 2016. We used demographic and genetic data to parameterize a population genetics individual‐based simulation model of the Olympic Range mountain goats. We calibrated the model to replicate the population trajectory for Olympic mountain goats from establishment in the 1920s through the 1983 first census. As expected, modeled population dynamics from 1928 to 1983 mimicked parameter initialization from expanding populations. However, simulated heterozygosity did not align with observations, suggesting a process not accounted for within the simulation model, such as a bottleneck or founder effect. Sensitivity analyses showed changes in annual reproductive rate, juvenile mortality, and adult female mortality influencing population trajectories, but variation in male mortality revealed no changes. Evaluating the population dynamics of the model after removals showed that approximately 80% of the total animals removed during the 1980s needed to be female in order for the observed population estimates to occur. This model has the potential to be used more widely with established or introduced mountain goat populations, as well as to provide an approach for studying other introduced species and their population dynamics.

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Mountain goat abundance and population trends in the Olympic Mountains, Washington, 2011

Cited by 2 publications

References 3 publications

Two new species of Sabulina (Caryophyllaceae) from Washington State, U.S.A.

Two new species of Sabulina (Caryophyllaceae) from Washington State, U.S.A.

Reconstructing mountain goat history in the Olympic Mountains, USA

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