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Showing 1 to 20 of 47 for “"Non-metric Multidimensional Scaling"”.

  1. Spatial and temporal distribution of larval fishes in a large tidal river.

    Seelig, Harold2015

    … in assemblage composition were analyzed using non-metric multidimensional scaling (NMS). Interannual differences were attributable to anadromous and semi-migratory species. Seasonal differences were attributable to herrings, perches, and minnows. Both interannual and seasonal differences in …

    vcu Repository record

  2. GROUND BEETLES (COLEOPTERA: CARABIDAE) AS BIODIVERSITY INDICATORS FOR AGE STRUCTURE IN PIEDMONT FORESTS?

    Riley, Kathryn NicoleWake Forest University2010

    … significantly across classes. The results of non-metric multidimensional scaling (NMDS) and Detrended Correspondence Analysis (DCA) ordination both show a clear separation of forest age classes in terms of beetle community composition. Eighteen carabid species were identified as potential …

    wfu Repository record

  3. Relative Roles of Environmental Conditions and Riverscape Connectivity On Fish Metacommunity Structure

    Leisen, Joshua Robert

    … watershed throughout northern South Carolina. Non-metric multidimensional scaling and Mantel and partial Mantel tests were used to test specific hypotheses concerning the structuring effects of environmental and spatial factors on fish communities. Generalist and specialist species patterns …

    south-carolina Repository record

  4. Land snail species diversity and composition between different forest disturbance regimes in central and eastern Kentucky Forests

    Douglas, DanielEastern Kentucky University

    … a random effects analysis of variance as well as non-metric multidimensional scaling to compare community structures. Habitat data was analyzed using canonical correspondence analysis. In the Inner Bluegrass Region, the snail diversity was high, and had low variability between sampling plots, but …

    eku Repository record

  5. BRYOPHYTE ASSEMBLAGES ON AMERICAN HORNBEAM (CARPINUS CAROLINIANA) AND THE SURROUNDING ARBOREAL COMMUNITIES WITHIN THE FOREST OF EAST TEXAS

    Edwards, Cassey2018

    <p>The bryophytes, the non-vascular plants, include the mosses (Bryophyta with approximately 13,000 species), the liverworts (Marchantiophyta with approximately 5,000 species), and the hornworts (Anthocerotophyta with approximately 150 species). Initial observations indicated that the midstory tree …

    sfasu Repository record

  6. A Cryptic Invasion of the Non-Native Siberian Elm (Ulmus Pumila) to Southwest Missouri

    Ladd, Megan E.

    Non-native species invasions are of high ecological importance due to their ability to transform native ecosystems. One such species, Siberian elm, has been shown to have been invading native landscapes across the central and eastern United States since the late 1800s. The natives, American elm and …

    mo-state Repository record

  7. Bycatch associated with a horseshoe crab (Limulus polyphemus) trawl survey: identifying species composition and distribution

    Graham, Larissa JoyVirginia Tech2007

    … bycatch in the horseshoe crab trawl fishery. Non-metric multidimensional scaling (NMS) was used to cluster sites and identify the spatial distribution of taxa. Sites strongly clustered into distinct groups, suggesting that species composition changes spatially and seasonally. Species …

    vt Repository record

  8. Semi-Supervised Anomaly Detection and Heterogeneous Covariance Estimation for Gaussian Processes

    Crandell, Ian C.Virginia Tech2017

    … sensor systems measuring diverse physical phenomenon. We consider systems that measure at different temporal frequencies and measure responses with different dimensionalities. Our goal is to provide estimates of correlation between all pairs of sensors and use this information to flag potentially …

    vt Repository record

  9. Assessing The Impacts Of Grazing By Piney Woods Cattle And Controlled Burning On The Herbaceous Layer In An East Gulf Coastal Plain Longleaf Pine Woodland

    McFarland, William2024

    … effect on community similarity, with a Non-Metric Multidimensional Scaling plot visualizing the similarity of groups with each other.</p> <p>Overall, fire combined with grazing appears to yield the highest levels of diversity with a community composition similar to that of …

    usm Repository record

  10. Sample Collection and DNA Extraction Methods for Environmental DNA Metabarcoding in Headwater Streams

    Mullins, Michael TristonEastern Kentucky University

    … I (COI) gene regions. The 18s sequence data is non-reportable due to lack of sequence quality, and MoBio's PowerWater did not yield DNA suitable concentrations. CTAB and DNeasy extractions yielded successful PCR reactions and high-throughput sequencing (HTS). When combined with their respective …

    eku Repository record

  11. Phytosociology and vegetation ecology of uMlalazi Nature Reserve

    Zungu, Nqobile S'phesihleUniversity of Zululand2017

    … soils. Ordination was carried out using the Non-metric Multidimensional Scaling to investigate the relationship between species and their underlying environmental factors. Ordination revealed that the presence or absence of some environmental factors such as, exposure to salt spray, salt …

    zulu Repository record

  12. Aronia mitschurinii: Solving a Horticultural Enigma

    Leonard, Peter J2011

    … </em>and ×<em>Sorbaronia </em>‘Ivan’s Beauty’. Non-metric multidimensional scaling (nMDS) clustered <em>A. mitschurinii</em> apart from wild <em>Aronia </em>spp., and demonstrated a relationship between <em>Sorbus aucuparia</em>, ×<em>Sorbaronia fallax</em>, and <em>Aronia</em>. Bayesian …

    uconn-diss Repository record

  13. Novel Applications of Multivariate Methods for Exploring Personality in African Elephants

    Felton, Shilo Kimberly

    … I also defined personalities by centroids (in multidimensional space) for non-metric multidimensional scaling (NMDS) scores of each individual and dispersion of NMDS scores for each individual as a measure of behavioral plasticity. I analyzed the effects of plasticity and age on personality of …

    wku-diss Repository record

  14. THE INFLUENCE OF THE INVASIVE CHINESE TALLOW (TRIADICA SEBIFERA) LEAF LITTER ON AQUATIC CHEMISTRY AND MICROBIAL COMMUNITY COMPOSITION

    Montez, Raymond D2016

    … the movement and invasive potential of nonnative plants in native environments. These invasions can have negative effects on ecosystem diversity and function. The nonnative and invasive plant, Chinese Tallow (<em>Triadica sebifera), </em>has already invaded much of the south eastern US …

    sfasu Repository record

  15. Impact of Chloramination on the Development of Oligotrophic Biofilms

    Ling, FangqiongUniversity of Illinois at Urbana-Champaign2011

    … change was revealed by cluster analysis and non-metric multidimensional scaling based on 16S rRNA gene-based microbial fingerprinting analysis. Samples from different reactors at the same time point had a high similarity before disinfection, but became dissimilar after disinfection. This …

    uiuc Repository record

  16. Patterns in Fish Community Structure in a Regulated River

    Davis, Richard2015

    … and diversity throughout the study. I used non-metric multidimensional scaling (NMDS) to create a community composition model. Fish composition was noticeably greater post-peaking and changed minimally across time and event. There were no statistically significant differences in species …

    vcu Repository record

  17. Pollution control investment decisions and policy preferences of senior managers of the Southern African fish processing industry

    Lipschitz, StevenDepartment of Environmental and Geographical Science1990

    … ordered preference data was analyzed using a multidimensional unfolding computer algorithm. This structural multivariate statistical method is a special case of non-metric multidimensional scaling that generates perceptual maps which can aid in the discovery of the hidden structure underlying …

    cape-town Repository record

  18. Observations on myxozoans (Myzozoa: Myxosporea) and the spatial and temporal variation in parasite assemblages of the nosestripe klipfish, Muraenoclinus dorsalis Bleeke, 1860 (Perciformes: Clinidae)

    Tang, LauraDepartment of Biological Sciences2010

    … over space and time were also probed. Non-metric multidimensional scaling, cluster analysis and Analysis of Similarity showed that community composition during both summer and winter differed most between Kommetjie and Jacobsbaai, the sites geographically furthest apart. This …

    cape-town Repository record

  19. Ecological resilience at semi-arid and temperate boundaries of the Mediterranean-type Fynbos Biome, South Africa, during the Holocene

    Macpherson, Allan JDepartment of Biological Sciences2016

    … optimal sequence splitting by least-squares, and Non-metric Multidimensional Scaling (NMDS) was applied to the fossil data to identify distinct assemblages in the record, and to further elucidate ecosystem trajectories through time. At the semi-arid boundary at Groenkloof (5,500 cal yrs BP - near …

    cape-town Repository record

  20. Impacts of the introduced crabs, Carcinus maenas and Hemigrapsus sanguineus, in northern New England

    Tyrrell, Megan Conlon

    … at two coastal and one estuarine location. Both non-metric multidimensional scaling and cluster analysis of the community data indicated that there was low temporal variability between each tidal height at a particular location. Carcinus maenas was the dominant crab at all locations, but by the …

    unh-thes Repository record

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