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Filtering by: Creator Kellogg, Royal S. Remove constraint Creator: Kellogg, Royal S. Committee Member Gitelman, Alix Remove constraint Committee Member: Gitelman, Alix Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • The importance of egg size for the diversity of salmonids

    Creator:
    Leblanc, Camille A.
    Abstract:
    Understanding the origin and nature of intra specific biodiversity enables us to better conserve and manage animal populations. Biological diversity is seen at different scales and for different traits such as behavior, morphology, physiology, and life history. Behavior is especially important since behavioral changes are believed to precede changes in...
    Resource Type:
    Dissertation
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    . 11 CONTRIBUTION OF AUTHORS Drs. David L. G. Noakes and Sigurđur S. Snorrason, my co-advisors

  • Generalized linear mixed models with censored covariates

    Creator:
    Giovanini, John
    Abstract:
    This dissertation is about statistical methods for data analysis using generalized linear mixed models (GLMMs) with censored covariates. Special attention in given to the particular problem of inference about age-specific reproductive success in wild animal populations using some animals with known ages and some animals with ages only known to...
    Resource Type:
    Dissertation
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    to thank all the faculty, staff, and student s of the Oregon State University Statistics Department

  • The evolutionary stability of partial migration

    Creator:
    Ohms, Haley A.
    Abstract:
    Natural selection, in its most basic form, is described as a process in which traitsincrease or decrease in frequency depending on their fitness, and only the trait withthe highest fitness will remain in the population. Yet, populations rarely have asingle `optimal' trait. The way natural selection maintains this observed variationwithin...
    Resource Type:
    Dissertation
    Full Text:
    Oregon Lottery and Dr. Hari S. and Dr. Renuka R. Sethi. The Lytle Lab has provided compassionate

  • Complexity in host-pathogen dynamics : dispersal uncertainties, metapopulation persistence and the role of a changing climate

    Creator:
    Xie, Yang
    Abstract:
    Emerging infectious diseases impact both human and wildlife populations. Infectious agents, in particular the aquatic fungus Batrachochytrium dendrobatidis (chytrid), have an influential role in driving global amphibian population declines. The emergence of the chytrid fungus has aspects of both geographic spread as well as climate shifts altering environmental conditions and...
    Resource Type:
    Dissertation
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    L, Walker S and MC Fisher. 2007. Climate change and outbreaks of amphibian chytridiomycosis in a

  • Predictability and constraints on the structure of ecological communities in the context of climate change

    Creator:
    Barner, Allison K.
    Abstract:
    Ecologists must increasingly balance the need for accurate predictions about how ecosystems will be affected by climate change, against the fact that making such predictions at the ecosystem-level may be infeasible. Although information about responses of individual species to a changing environment is increasing, scaling such information to the community...
    Resource Type:
    Dissertation
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    S. sessilis, I constructed a putative web of interactions among S. sessilis and understory species

  • A Statistical Analysis and Interpretation of the HyperLogLog Algorithm

    Creator:
    Chick, Alexander
    Abstract:
    The HyperLogLog (HLL) algorithm is used to estimate the cardinality of large sets. This thesis gives a novel analysis of the HyperLogLog algorithm by using techniques from statistics and probability. Initially, closed form bounds for the mean and variance of the max of n independent and identically distributed geometric random...
    Resource Type:
    Dissertation
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    . Theoretically, a hash function h : D 7→ {0, 1}∞, maps a domain to an infinite sequence of 0’s and 1’s, or

  • Explorations Into Who is Doing Freshwater Science and How We are Altering Waterscapes

    Creator:
    Abernethy, Erin F.
    Abstract:
    The United States of America and the world are faced with three massive intertwining challenges at this time: COVID-19, racial inequity, and climate change. As a species, humans must come together and collectively address these challenges to preserve our humanity and make our world a more just and livable place...
    Resource Type:
    Dissertation

  • Likelihood analysis of the multivariate ordinal probit model for repeated and spatial ordered categorical responses

    Creator:
    Li, Yonghai
    Abstract:
    This dissertation is about the likelihood analysis of ordered categorical responses in a longitudinal/spatial study, meaning regression-like analysis when the response variable is categorical with ordered categories, and is measured repeatedly over time or space on the experimental or sampling units. Particular attention is given to the multivariate ordinal probit...
    Resource Type:
    Dissertation
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    of ordinal responses and α’s are called thresholds or cutpoints. The extreme categories 1 and G are

  • The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

    Creator:
    Zarnetske, Phoebe Lehmann
    Abstract:
    Biological invasions provide a unique opportunity to study the mechanisms that regulate community composition and ecosystem function. Invasive species that are also ecosystem engineers can substantially alter physical features in an environment, and this can lead to cascading effects on the biological community. Aquatic-terrestrial interface ecosystems are excellent systems to...
    Resource Type:
    Dissertation
    Full Text:
    , from the 1950’s/1967 to 2002, and from 2006 to 2009 ............ 37 3.1 Conceptual diagrams showing

  • Corporate social responsibility in the forest products industry : an issues management approach

    Creator:
    Panwar, Rajat
    Abstract:
    Business is a social institution and society has always designated a role for business which has been undergoing changes with changing societal values and paradigms. Thus while business has always had some responsibilities, the modern connotation of the words corporate social responsibility commonly refers to business assuming responsibilities in economic,...
    Resource Type:
    Dissertation