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  • The effect of spatial configuration of habitat capacity on β diversity

    Creator:
    Dong, X., Muneepeerakul, R., Olden, J. D., and Lytle, D. A.
    Abstract:
    Patterns of β diversity are commonly used to infer underlying ecological processes. In this study, we examined the effect of spatial configuration of habitat capacity on different metrics of β diversity, i.e., β diversity measured as turnover and as variation. For β diversity as turnover, a monotonic species spatial turnover...
    Resource Type:
    Article
    Full Text:
    ., Muneepeerakul, R., Olden, J. D., & Lytle, D. A. (2015). The effect of spatial configuration of habitat capacity

  • From Hydrology to Biology: How Abiotic Factors Structure Invertebrate Communities in a Free-Flowing River Network

    Creator:
    Hockett, Justin
    Abstract:
    Chapter 2: Aquatic macroinvertebrate communities have been shown to exhibit strong differences between erosional (riffle and run) and depositional (pool) macrohabitats of streams. A subset of these communities are aquatic insect taxa that are an important food source for riparian consumers like birds, bats, lizards, and spiders. Understanding the role...
    Resource Type:
    Masters Thesis
    Full Text:
    samples (Dong et al., 2015). Pairwise comparisons of Chao- Sorensen similarity were run in the R package

  • Optimal spatial-dynamic resource allocation facing uncertainty : integrating economics and ecology for invasive species policy

    Creator:
    Hall, Kim M.
    Abstract:
    The spatial and temporal behavior of invasive species spread implies that optimal management strategies involve decisions over space and time. Dispersal and propagule pressure are two primary drivers of the spatial-temporal ecological process of species invasion. In the case of riparian communities, stream flow drives the dispersal of vegetation propagules....
    Resource Type:
    Dissertation
    Full Text:
    (Muneepeerakul, Weitz et al. 2007). Subsequent to dispersal, propagules must be able to establish in a site

  • SchrieverConvergentDiversityTrait.pdf

    Creator:
    Schriever, Tiffany A. and Lytle, David A.
    Abstract:
    Hydrology is the main environmental filter in aquatic ecosystems and may result in shared tolerances and functional traits among species in disparate ecosystems. We analyzed the associations between taxonomic and functional facets of diversity within aquatic ecosystems (ponds vs. streams) across a hydroperiod gradient (1–365 d) to untangle the hydrologic...
    Full Text:
    . Dong, X., R. Muneepeerakul, J. D. Olden, and D. A. Ly- tle. 2015. The effect of spatial configuration

  • Simulator-Defined MDP Planning with Applications in Natural Resource Management

    Creator:
    Alkaee Taleghan, Majid
    Abstract:
    This work is inspired by problems in natural resource management centered on the challenge of invasive species. Computing optimal management policies for maintaining ecosystem sustainable is challenging. Many ecosystem management problems can be formulated as MDP (Markov Decision Process) planning problems. In a simulator-defined MDP, the Markovian dynamics and rewards...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 4.6 Plots of V UCB(λ ν lower) R , VR − V UCB(λνlower) R , and V UCB(λνlower) C on the vertical

  • Drought, dispersal, and community dynamics in arid-land streams

    Creator:
    Bogan, Michael T.
    Abstract:
    Understanding the mechanisms that regulate local species diversity and community structure is a perennial goal of ecology. Local community structure can be viewed as the result of numerous local and regional processes; these processes act as filters that reduce the regional species pool down to the observed local community. In...
    Resource Type:
    Dissertation
    Full Text:
    . Invertebrate taxa which had high Pearson’s correlations (r > 0.5) with either the non- metric

  • Riverscape genetics of Oncorhynchus tshawytscha (Chinook salmon) in Siletz River, OR

    Creator:
    Davis, Chanté D.
    Abstract:
    Traditional analysis in population genetics evaluates differences among groups of individuals and, in some cases, considers the effects of distance or potential barriers to gene flow. However, many forces may shape genetic variation of organisms in riverine systems. Similarly complex research linking habitat heterogeneity and configuration to genetic structure has...
    Resource Type:
    Dissertation
    Full Text:
    )). Analysis was carried out using R package IGRAPH (R core team 2016). ...................... 108  Figure

  • The Benefits of Time: Characterizing Intra-and Inter-Annual Variability in Oregon Wetland Ecosystems Using the Landsat Spectral-Temporal Domain

    Creator:
    Fickas, Kate C.
    Abstract:
    The use of Landsat data has historically been constrained to spectral and spatial information derived from a carefully selected image or set of images. However, free and open access to Landsat imagery combined with advances in data storage and computing are revolutionizing how the Landsat temporal domain is used to...
    Resource Type:
    Dissertation