GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Milton :CRC Press LLC,
    Keywords: Environmental sciences--Statistical methods. ; Electronic books.
    Description / Table of Contents: Environmental and Ecological Statistics with R, Second Edition focuses on statistical modeling and data analysis for environmental and ecological problems. By guiding readers through the process of scientific problem solving and statistical model development, it eases the transition from scientific hypothesis to statistical model.
    Type of Medium: Online Resource
    Pages: 1 online resource (560 pages)
    Edition: 2nd ed.
    ISBN: 9781498728737
    Series Statement: Chapman and Hall/CRC Applied Environmental Statistics Series
    DDC: 550.2855133
    Language: English
    Note: Cover -- Half Title -- Title Page -- Copyright Page -- Dedication -- Table of Contents -- Preface -- List of Figures -- List of Tables -- I: Basic Concepts -- 1: Introduction -- 1.1 Tool for Inductive Reasoning -- 1.2 The Everglades Example -- 1.2.1 Statistical Issues -- 1.3 Effects of Urbanization on Stream Ecosystems -- 1.3.1 Statistical Issues -- 1.4 PCB in Fish from Lake Michigan -- 1.4.1 Statistical Issues -- 1.5 Measuring Harmful Algal Bloom Toxin -- 1.6 Bibliography Notes -- 1.7 Exercise -- 2: A Crash Course on R -- 2.1 What is R? -- 2.2 Getting Started with R -- 2.2.1 R Commands and Scripts -- 2.2.2 R Packages -- 2.2.3 R Working Directory -- 2.2.4 Data Types -- 2.2.5 R Functions -- 2.3 Getting Data into R -- 2.3.1 Functions for Creating Data -- 2.3.2 A Simulation Example -- 2.4 Data Preparation -- 2.4.1 Data Cleaning -- 2.4.1.1 Missing Values -- 2.4.2 Subsetting and Combining Data -- 2.4.3 Data Transformation -- 2.4.4 Data Aggregation and Reshaping -- 2.4.5 Dates -- 2.5 Exercises -- 3: Statistical Assumptions -- 3.1 The Normality Assumption -- 3.2 The Independence Assumption -- 3.3 The Constant Variance Assumption -- 3.4 Exploratory Data Analysis -- 3.4.1 Graphs for Displaying Distributions -- 3.4.2 Graphs for Comparing Distributions -- 3.4.3 Graphs for Exploring Dependency among Variables -- 3.5 From Graphs to Statistical Thinking -- 3.6 Bibliography Notes -- 3.7 Exercises -- 4: Statistical Inference -- 4.1 Introduction -- 4.2 Estimation of Population Mean and Confidence Interval -- 4.2.1 Bootstrap Method for Estimating Standard Error -- 4.3 Hypothesis Testing -- 4.3.1 t-Test -- 4.3.2 Two-Sided Alternatives -- 4.3.3 Hypothesis Testing Using the Confidence Interval -- 4.4 A General Procedure -- 4.5 Nonparametric Methods for Hypothesis Testing -- 4.5.1 Rank Transformation -- 4.5.2 Wilcoxon Signed Rank Test -- 4.5.3 Wilcoxon Rank Sum Test. , 4.5.4 A Comment on Distribution-Free Methods -- 4.6 Significance Level α, Power 1 - β, and p-Value -- 4.7 One-Way Analysis of Variance -- 4.7.1 Analysis of Variance -- 4.7.2 Statistical Inference -- 4.7.3 Multiple Comparisons -- 4.8 Examples -- 4.8.1 The Everglades Example -- 4.8.2 Kemp's Ridley Turtles -- 4.8.3 Assessing Water Quality Standard Compliance -- 4.8.4 Interaction between Red Mangrove and Sponges -- 4.9 Bibliography Notes -- 4.10 Exercises -- II: Statistical Modeling -- 5: Linear Models -- 5.1 Introduction -- 5.2 From t-test to Linear Models -- 5.3 Simple and Multiple Linear Regression Models -- 5.3.1 The Least Squares -- 5.3.2 Regression with One Predictor -- 5.3.3 Multiple Regression -- 5.3.4 Interaction -- 5.3.5 Residuals and Model Assessment -- 5.3.6 Categorical Predictors -- 5.3.7 Collinearity and the Finnish Lakes Example -- 5.4 General Considerations in Building a Predictive Model -- 5.5 Uncertainty in Model Predictions -- 5.5.1 Example: Uncertainty in Water Quality Measurements -- 5.6 Two-Way ANOVA -- 5.6.1 ANOVA as a Linear Model -- 5.6.2 More Than One Categorical Predictor -- 5.6.3 Interaction -- 5.7 Bibliography Notes -- 5.8 Exercises -- 6: Nonlinear Models -- 6.1 Nonlinear Regression -- 6.1.1 Piecewise Linear Models -- 6.1.2 Example: U.S. Lilac First Bloom Dates -- 6.1.3 Selecting Starting Values -- 6.2 Smoothing -- 6.2.1 Scatter Plot Smoothing -- 6.2.2 Fitting a Local Regression Model -- 6.3 Smoothing and Additive Models -- 6.3.1 Additive Models -- 6.3.2 Fitting an Additive Model -- 6.3.3 Example: The North American Wetlands Database -- 6.3.4 Discussion: The Role of Nonparametric Regression Models in Science -- 6.3.5 Seasonal Decomposition of Time Series -- 6.3.5.1 The Neuse River Example -- 6.4 Bibliographic Notes -- 6.5 Exercises -- 7: Classification and Regression Tree -- 7.1 The Willamette River Example. , 7.2 Statistical Methods -- 7.2.1 Growing and Pruning a Regression Tree -- 7.2.2 Growing and Pruning a Classification Tree -- 7.2.3 Plotting Options -- 7.3 Comments -- 7.3.1 CART as a Model Building Tool -- 7.3.2 Deviance and Probabilistic Assumptions -- 7.3.3 CART and Ecological Threshold -- 7.4 Bibliography Notes -- 7.5 Exercises -- 8: Generalized Linear Model -- 8.1 Logistic Regression -- 8.1.1 Example: Evaluating the Effectiveness of UV as a Drinking Water Disinfectant -- 8.1.2 Statistical Issues -- 8.1.3 Fitting the Model in R -- 8.2 Model Interpretation -- 8.2.1 Logit Transformation -- 8.2.2 Intercept -- 8.2.3 Slope -- 8.2.4 Additional Predictors -- 8.2.5 Interaction -- 8.2.6 Comments on the Crypto Example -- 8.3 Diagnostics -- 8.3.1 Binned Residuals Plot -- 8.3.2 Overdispersion -- 8.3.3 Seed Predation by Rodents: A Second Example of Logistic Regression -- 8.4 Poisson Regression Model -- 8.4.1 Arsenic Data from Southwestern Taiwan -- 8.4.2 Poisson Regression -- 8.4.3 Exposure and Offset -- 8.4.4 Overdispersion -- 8.4.5 Interactions -- 8.4.6 Negative Binomial -- 8.5 Multinomial Regression -- 8.5.1 Fitting a Multinomial Regression Model in R -- 8.5.2 Model Evaluation -- 8.6 The Poisson-Multinomial Connection -- 8.7 Generalized Additive Models -- 8.7.1 Example: Whales in the Western Antarctic Peninsula -- 8.7.1.1 The Data -- 8.7.1.2 Variable Selection Using CART -- 8.7.1.3 Fitting GAM -- 8.7.1.4 Summary -- 8.8 Bibliography Notes -- 8.9 Exercises -- III: Advanced Statistical Modeling -- 9: Simulation for Model Checking and Statistical Inference -- 9.1 Simulation -- 9.2 Summarizing Regression Models Using Simulation -- 9.2.1 An Introductory Example -- 9.2.2 Summarizing a Linear Regression Model -- 9.2.2.1 Re-transformation Bias -- 9.2.3 Simulation for Model Evaluation -- 9.2.4 Predictive Uncertainty -- 9.3 Simulation Based on Re-sampling. , 9.3.1 Bootstrap Aggregation -- 9.3.2 Example: Confidence Interval of the CART-Based Threshold -- 9.4 Bibliography Notes -- 9.5 Exercises -- 10: Multilevel Regression -- 10.1 From Stein's Paradox to Multilevel Models -- 10.2 Multilevel Structure and Exchangeability -- 10.3 Multilevel ANOVA -- 10.3.1 Intertidal Seaweed Grazers -- 10.3.2 Background N2O Emission from Agriculture Fields -- 10.3.3 When to Use the Multilevel Model? -- 10.4 Multilevel Linear Regression -- 10.4.1 Nonnested Groups -- 10.4.2 Multiple Regression Problems -- 10.4.3 The ELISA Example-An Unintended Multilevel Modeling Problem -- 10.5 Nonlinear Multilevel Models -- 10.6 Generalized Multilevel Models -- 10.6.1 Exploited Plant Monitoring-Galax -- 10.6.1.1 A Multilevel Poisson Model -- 10.6.1.2 A Multilevel Logistic Regression Model -- 10.6.2 Cryptosporidium in U.S. Drinking Water-A Poisson Regression Example -- 10.6.3 Model Checking Using Simulation -- 10.7 Concluding Remarks -- 10.8 Bibliography Notes -- 10.9 Exercises -- 11: Evaluating Models Based on Statistical Signicance Testing -- 11.1 Introduction -- 11.2 Evaluating TITAN -- 11.2.1 A Brief Description of TITAN -- 11.2.2 Hypothesis Testing in TITAN -- 11.2.3 Type I Error Probability -- 11.2.4 Statistical Power -- 11.2.5 Bootstrapping -- 11.2.6 Community Threshold -- 11.2.7 Conclusions -- 11.3 Exercises -- Bibliography -- Index.
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Book
    Book
    Boca Raton : CRC Press, Taylor & Francis Group
    Keywords: Environmental sciences Statistical methods ; Ecology Statistical methods ; R (Computer program language) ; Umweltstatistik
    Type of Medium: Book
    Pages: xxiii, 535 Seiten , Diagramme, Karten
    Edition: Second edition
    ISBN: 9781498728720
    Series Statement: Chapman & Hall/CRC applied environmental statistics
    DDC: 550.285/5133
    RVK:
    Language: English
    Note: Literaturverzeichnis: Seiten 515-528
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 40 (2004), S. 0 
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Dynamic linear models (DLM) and seasonal trend decomposition (STL) using local regression, or LOESS, were used to analyze the 50-year time series of suspended sediment concentrations for the Yadkin River, measured at the U.S. Geological Survey station at Yadkin College, North Carolina. A DLM with constant trend, seasonality, and a log10 streamflow regressor provided the best model to predict monthly mean log10 suspended sediment concentrations, based on the forecast log likelihood. Using DLM, there was evidence (odds approximately 69:1) that the log10 streamflow versus log10 suspended sediment concentration relationship has changed, with an approximate 20 percent increase in the log10 streamflow coefficient over the period 1981 to 1996. However, sediment concentrations in the Yadkin River have decreased during the decade of the 1990s, which has been accompanied by a concomitant increase in streamflow variability. Although STL has been shown to be a versatile trend analysis technique, DLM is shown to be more suitable for discovery and inference of structural changes (trends) in the model coefficient describing the relationship between flow and sediment concentration.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 33 (1997), S. 0 
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 33 (1997), S. 0 
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The purpose of this article is to discuss the importance of uncertainty analysis in water quality modeling, with an emphasis on the identification of the correct model specification. A wetland phosphorus retention model is used as an example to illustrate the procedure of using a filtering technique for model structure identification. Model structure identification is typically done through model parameter estimation. However, due to many sources of error in both model parameterization and observed variables and data, error-in-variable is often a problem. Therefore, it is not appropriate to use the least squares method for parameter estimation. Two alternative methods for parameter estimation are presented. The first method is the maximum likelihood estimator, which assumes independence of the observed response variable values. In anticipating the possible violation of the independence assumption, a second method, which coupled a maximum likelihood estimator and Kalman filter model, was presented. Furthermore, a Monte Carlo simulation algorithm is presented as a preliminary method for judging whether the model structure is appropriate or not.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Environmental and ecological statistics 4 (1997), S. 1-29 
    ISSN: 1573-3009
    Keywords: geostatistics ; nutrients ; soils ; water quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Phosphorus-enriched agriculture runoff is believed to be the leading cause of ecosystem changes of Everglades wetlands. To study this effect, it is necessary to estimate the area of the affected region. In this study, Bayesian kriging and universal kriging were used to estimate the area by analysing the data collected by Reddy et al. (1991). The background level of the soil's total phosphorus concentration is usedto determine whether the region is affected by the agriculture runoff, through an indicator function. The area of the affected region was represented by the integration of the indicator function over the entire wetland. The expected value of the affected area was calculated using the results derived from Bayesian and universal kriging. The outcome indicates that universal kriging is sensitive to specification of thecovariance model. It was observed that universal kriging and Bayesian kriging yield comparable results, if the specified covariance structures are of similar nature.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Environmental and ecological statistics 7 (2000), S. 77-91 
    ISSN: 1573-3009
    Keywords: acid deposition ; Bayesian inference ; Dirichlet distribution ; fish response ; Gibbs sampler ; lake eutrophication ; PCB ; risk assessment ; salmonid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In environmental management, we often have to deal with binary response variables whose outcome dictates the course of action. This paper introduces a nonparametric Bayesian binary regression model with a single predictor variable that is more flexible than the commonly used logistic or probit models. Due to the Bayesian feature, the model can be easily used to combine observed data with our knowledge of the subject to produce site-specific results. By using three examples, this paper shows the potential application of the model in the environmental management, and its advantages in terms of flexibility in model specification, robustness to outliers, and realistic interpretation of data.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2022-05-25
    Description: Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 310 (2006): 271-295, doi:10.3354/meps310271.
    Description: Cetacean–habitat modeling, although still in the early stages of development, represents a potentially powerful tool for predicting cetacean distributions and understanding the ecological processes determining these distributions. Marine ecosystems vary temporally on diel to decadal scales and spatially on scales from several meters to 1000s of kilometers. Many cetacean species are wide-ranging and respond to this variability by changes in distribution patterns. Cetacean–habitat models have already been used to incorporate this variability into management applications, including improvement of abundance estimates, development of marine protected areas, and understanding cetacean–fisheries interactions. We present a review of the development of cetacean–habitat models, organized according to the primary steps involved in the modeling process. Topics covered include purposes for which cetacean–habitat models are developed, scale issues in marine ecosystems, cetacean and habitat data collection, descriptive and statistical modeling techniques, model selection, and model evaluation. To date, descriptive statistical techniques have been used to explore cetacean–habitat relationships for selected species in specific areas; the numbers of species and geographic areas examined using computationally intensive statistic modeling techniques are considerably less, and the development of models to test specific hypotheses about the ecological processes determining cetacean distributions has just begun. Future directions in cetacean–habitat modeling span a wide range of possibilities, from development of basic modeling techniques to addressing important ecological questions.
    Description: Funding from the U.S. Navy and the Strategic Environmental Research and Development Program (SERDP) supported this research under Projects CS-1390 and CS-1391.
    Keywords: Cetacean–habitat modeling ; Predictive models ; Regression models ; Cross validation ; Spatial autocorrelation ; Classification models ; Ordination ; Environmental envelope models
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2022-05-25
    Description: Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 317 (2006): 297-310, doi:10.3354/meps317297.
    Description: The Western Antarctic Peninsula (WAP) is a biologically rich area supporting large standing stocks of krill and top predators (including whales, seals and seabirds). Physical forcing greatly affects productivity, recruitment, survival and distribution of krill in this area. In turn, such interactions are likely to affect the distribution of baleen whales. The Southern Ocean GLOBEC research program aims to explore the relationships and interactions between the environment, krill and predators around Marguerite Bay (WAP) in autumn 2001 and 2002. Bathymetric and environmental variables including acoustic backscattering as an indicator of prey abundance were used to model whale distribution patterns. We used an iterative approach employing (1) classification and regression tree (CART) models to identify oceanographic and ecological variables contributing to variability in humpback Megaptera novaeangliae and minke Balaenoptera acutorstrata whale distribution, and (2) generalized additive models (GAMs) to elucidate functional ecological relationships between these variables and whale distribution. The CART models indicated that the cetacean distribution was tightly coupled with zooplankton acoustic volume backscatter in the upper (25 to 100 m), and middle (100 to 300 m) portions of the water column. Whale distribution was also related to distance from the ice edge and bathymetric slope. The GAMs indicated a persistent, strong, positive relationship between increasing zooplankton volume and whale relative abundance. Furthermore, there was a lower limit for averaged acoustic volume backscatter of zooplankton below which the relationship between whales and prey was not significant. The GAMs also supported an annual relationship between whale distribution, distance from the ice edge and bathymetric slope, suggesting that these are important features for aggregating prey. Our results demonstrate that during the 2 yr study, whales were consistently and predictably associated with the distribution of zooplankton. Thus, humpback and minke whales may be able to locate physical features and oceanographic processes that enhance prey aggregation.
    Description: Resources for this project were provided by the National Science Foundation Office of Polar Programs grant OPP-9910307 and the International Whaling Commission. This work represents a portion of A.S.F.’s dissertation, funded by a Duke University Marine Laboratory Fellowship.
    Keywords: Whale distribution ; Zooplankton ; Ice edge ; Antarctica ; SO GLOBEC ; CART ; GAM
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...