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  • 1
    Online Resource
    Online Resource
    Princeton :Princeton University Press,
    Keywords: Electronic books.
    Description / Table of Contents: No detailed description available for "Models for Ecological Data".
    Type of Medium: Online Resource
    Pages: 1 online resource (634 pages)
    Edition: 1st ed.
    ISBN: 9780691220123
    DDC: 577.015118
    Language: English
    Note: Cover Page -- Title page -- Half-title page -- Copyright page -- Contents -- Preface -- Part I: Introduction -- 1. Models in Context -- 1.1 Complexity and Obscurity in Nature and in Models -- 1.2 Making the Connections: Data, Inference, and Decision -- 1.3 Two Elements of Models: Known and Unknown -- 1.4 Learning with Models: Hypotheses and Quantification -- 1.5 Estimation versus Forward Simulation -- 1.6 Statistical Pragmatism -- 2. Model Elements: Application to Population Growth -- 2.1 A Model and Data Example -- 2.2 Model State and Time -- 2.3 Stochasticity for the Unknown -- 2.4 Additional Background on Process Models -- Part II: Elements of Inference -- 3. Point Estimation: Maximum Likelihood and the Method of Moments -- 3.1 Introduction -- 3.2 Likelihood -- 3.3 A Binomial Model -- 3.4 Combining the Binomial and Exponential -- 3.5 Maximum Likelihood Estimates for the Normal Distribution -- 3.6 Population Growth -- 3.7 Application: Fecundity -- 3.8 Survival Analysis Using Maximum Likelihood -- 3.9 Design Matrixes -- 3.10 Numerical Methods for MLE -- 3.11 Moment Matching -- 3.12 Common Sampling Distributions and Dispersion -- 3.13 Assumptions and Next Steps -- 4. Elements of the Bayesian Approach -- 4.1 The Bayesian Approach -- 4.2 The Normal Distribution -- 4.3 Subjective Probability and the Role of the Prior -- 5. Confidence Envelopes and Prediction Intervals -- 5.1 Classical Interval Estimation -- 5.2 Bayesian Credible Intervals -- 5.3 Likelihood Profile for Multiple Parameters -- 5.4 Confidence Intervals for Several Parameters: Linear Regression -- 5.5 Which Confidence Envelope to Use -- 5.6 Predictive Intervals -- 5.7 Uncertainty and Variability -- 5.8 When Is It Bayesian? -- 6. Model Assessment and Selection -- 6.1 Using Statistics to Evaluate Models -- 6.2 The Role of Hypothesis Tests -- 6.3 Nested Models. , 6.4 Additional Considerations for Classical Model Selection -- 6.5 Bayesian Model Assessment -- 6.6 Additional Thoughts on Bayesian Model Assessment -- Part III: Larger Models -- 7. Computational Bayes: Introduction to Tools Simulation -- 7.1 Simulation to Obtain the Posterior -- 7.2 Some Basic Simulation Techniques -- 7.3 Markov Chain Monte Carlo Simulation -- 7.4 Application: Bayesian Analysis for Regression -- 7.5 Using MCMC -- 7.6 Computation for Bayesian Model Selection -- 7.7 Priors on the Response -- 7.8 The Basics Are Now Behind Us -- 8. A Closer Look at Hierarchical Structures -- 8.1 Hierarchical Models for Context -- 8.2 Mixed and Generalized Linear Models -- 8.3 Application: Growth Responses to CO2 -- 8.4 Thinking Conditionally -- 8.5 Two Applications to Trees -- 8.6 Noninformative Priors in Hierarchical Settings -- 8.7 From Simple Models to Graphs -- Part IV: More Advance Methods -- 9. Time -- 9.1 Why Is Time Important? -- 9.2 Time Series Terminology -- 9.3 Descriptive Elements of Time Series Models -- 9.4 The Frequency Domain -- 9.5 Application: Detecting Density Dependence in Population Time Series -- 9.6 Bayesian State Space Models -- 9.7 Application: Black Noddy on Heron Island -- 9.8 Nonlinear State Space Models -- 9.9 Lags -- 9.10 Regime Change -- 9.11 Constraints on Time Series Data -- 9.12 Additional Sources of Variablity -- 9.13 Alternatives to the Gibbs Sampler -- 9.14 More on Longitudinal Data Structures -- 9.15 Intervention and Treatment Effects -- 9.16 Capture-Recapture Studies -- 9.17 Structured Models as Matrixes -- 9.18 Structure as Systems of Difference Equations -- 9.19 Time Series, Population Regulation, and Stochasticity -- 10. Space-Time -- 10.1 A Deterministic Model for a Stochastic Spatial Process -- 10.2 Classical Inference on Population Movement -- 10.3 Island Biogeography and Metapopulations. , 10.4 Estimation of Passive Dispersal -- 10.5 A Bayesian Framework -- 10.6 Models for Explicit Space -- 10.7 Point-Referenced Data -- 10.8 Block-Referenced Data and Misalignment -- 10.9 Hierarchical Treatment of Space -- 10.10 Application: A Spatio-Temporal Model of Population Spread -- 10.11 How to Handle Space -- 11. Some Concluding Perspectives -- 11.1 Models, Data, and Decision -- 11.2 The Promise of Graphical Models, Improved Algorithms, and Faster Computers -- 11.3 Predictions and What to Do with Them -- 11.4 Some Remarks on Software -- Appendix A. Taylor Series -- Appendix B. Some Notes on Differential and Difference Equations -- Appendix C. Basic Matrix Algebra -- Appendix D. Probability Models -- Appendix E. Basic Life History Calculations -- Appendix F. Common Distributions -- Appendix G. Common Conjugate Likelihood-Prior Pairs -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Fuelwood-Burning-Environmental aspects-Congresses. ; Electronic books.
    Description / Table of Contents: Proceedings of the NATO Advanced Study Institute "Biomass Burning Emissions and Global Change", Held in Praia de Alvor Algarve, Portugal, October 1994.
    Type of Medium: Online Resource
    Pages: 1 online resource (490 pages)
    Edition: 1st ed.
    ISBN: 9783642591716
    Series Statement: Nato asi Subseries I: Series ; v.51
    DDC: 551.482
    Language: English
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  • 3
    Online Resource
    Online Resource
    Oxford :Oxford University Press,
    Keywords: Bayesian statistical decision theory. ; Multilevel models (Statistics). ; Mathematical statistics -- Data processing. ; Environmental sciences -- Statistical methods. ; Electronic books.
    Description / Table of Contents: New statistical tools are changing the way in which scientists analyze and interpret data and models. Hierarchical Bayes and Markov Chain Monte Carlo methods for analysis provide a consistent framework for inference and prediction where information is heterogeneous and uncertain, processes are complicated, and responses depend on scale. Nowhere are these methods more promising than in the environmental sciences.
    Type of Medium: Online Resource
    Pages: 1 online resource (216 pages)
    Edition: 1st ed.
    ISBN: 9780191513848
    DDC: 577.01/519542
    Language: English
    Note: Intro -- Contents -- Preface -- Contributors -- Part I: Introduction to hierarchical modeling -- 1 Elements of hierarchical Bayesian inference -- 2 Bayesian hierarchical models in geographical genetics -- Part II: Hierarchical models in experimental settings -- 3 Synthesizing ecological experiments and observational data with hierarchical Bayes -- 4 Effects of global change on inflorescence production: a Bayesian hierarchical analysis -- Part III: Spatial modeling -- 5 Building statistical models to analyze species distributions -- 6 Implications of vulnerability to hurricane damage for long-term survival of tropical tree species: a Bayesian hierarchical analysis -- Part IV: Spatio-temporal modeling -- 7 Spatial-temporal statistical modeling and prediction of environmental processes -- 8 Hierarchical Bayesian spatio-temporal models for population spread -- 9 Spatial models for the distribution of extremes -- References -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Y -- Z.
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  • 4
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    PANGAEA
    In:  Supplement to: Sanchez Goñi, Maria Fernanda; Desprat, Stéphanie; Daniau, Anne-Laure; Bassinot, Franck C; Polanco-Martínez, Josué M; Harrison, Sandy P; Allen, Judy R M; Anderson, R Scott; Behling, Hermann; Bonnefille, Raymonde; Burjachs, Francesc; Carrión, José S; Cheddadi, Rachid; Clark, James S; Combourieu-Nebout, Nathalie; Courtney-Mustaphi, Colin J; DeBusk, Georg H; Dupont, Lydie M; Finch, Jemma M; Fletcher, William J; Giardini, Marco; González, Catalina; Gosling, William D; Grigg, Laurie D; Grimm, Eric C; Hayashi, Ryoma; Helmens, Karin F; Heusser, Linda E; Hill, Trevor R; Hope, Geoffrey; Huntley, Brian; Igarashi, Yaeko; Irino, Tomohisa; Jacobs, Bonnie Fine; Jiménez-Moreno, Gonzalo; Kawai, Sayuri; Kershaw, A Peter; Kumon, Fujio; Lawson, Ian T; Ledru, Marie-Pierre; Lézine, Anne-Marie; Liew, Ping-Mei; Magri, Donatella; Marchant, Robert; Margari, Vasiliki; Mayle, Francis E; McKenzie, G Merna; Moss, Patrick T; Müller, Stefanie; Müller, Ulrich C; Naughton, Filipa; Newnham, Rewi M; Oba, Tadamichi; Pérez-Obiol, Ramon P; Pini, Roberta; Ravazzi, Cesare; Roucoux, Katherine H; Rucina, Stephen M; Scott, Louis; Takahara, Hikaru; Tzedakis, Polychronis C; Urrego, Dunia H; van Geel, Bas; Valencia, Bryan G; Vandergoes, Marcus J; Vincens, Annie; Whitlock, Cathy L; Willard, Debra A; Yamamoto, Masanobu (2017): The ACER pollen and charcoal database: a global resource to document vegetation and fire response to abrupt climate changes during the last glacial period. Earth System Science Data, 9(2), 679-695, https://doi.org/10.5194/essd-9-679-2017
    Publication Date: 2024-04-25
    Description: Quaternary records provide an opportunity to examine the nature of the vegetation and fire responses to rapid past climate changes comparable in velocity and magnitude to those expected in the 21st century. The best documented examples of rapid climate change in the past are the warming events associated with the Dansgaard-Oeschger (D-O) cycles during the last glacial period, which were sufficiently large to have had a potential feedback through changes in albedo and greenhouse gas emissions on climate. Previous reconstructions of vegetation and fire changes during the D-O cycles used independently constructed age models, making it difficult to compare the changes between different sites and regions. Here we present the ACER (Abrupt Climate Changes and Environmental Responses) global database which includes 93 pollen records from the last glacial period (73-15 ka) with a temporal resolution better than 1,000 years, 32 of which also provide charcoal records. A harmonized and consistent chronology based on radiometric dating (14C, 234U/230Th, OSL, 40Ar/39Ar dated tephra layers) has been constructed for 86 of these records, although in some cases additional information was derived using common control points based on event stratigraphy. The ACER database compiles metadata including geospatial and dating information, pollen and charcoal counts and pollen percentages of the characteristic biomes, and is archived in Microsoft ACCESS(TM).
    Keywords: Abrupt Climate Changes and Environmental Responses; ACER
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 5
    Publication Date: 2022-05-25
    Description: Author Posting. © Ecological Society of America, 2007. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 17 (2007): 1198–1212, doi:10.1890/05-1690.
    Description: The composition and successional status of a forest affect carbon storage and net ecosystem productivity, yet it remains unclear whether elevated atmospheric carbon dioxide (CO2) will impact rates and trajectories of forest succession. We examined how CO2 enrichment (+200 μL CO2/L air differential) affects forest succession through growth and survivorship of tree seedlings, as part of the Duke Forest free-air CO2 enrichment (FACE) experiment in North Carolina, USA. We planted 2352 seedlings of 14 species in the low light forest understory and determined effects of elevated CO2 on individual plant growth, survival, and total sample biomass accumulation, an integrator of plant growth and survivorship over time, for six years. We used a hierarchical Bayes framework to accommodate the uncertainty associated with the availability of light and the variability in growth among individual plants. We found that most species did not exhibit strong responses to CO2. Ulmus alata (+21%), Quercus alba (+9.5%), and nitrogen-fixing Robinia pseudoacacia (+230%) exhibited greater mean annual relative growth rates under elevated CO2 than under ambient conditions. The effects of CO2 were small relative to variability within populations; however, some species grew better under low light conditions when exposed to elevated CO2 than they did under ambient conditions. These species include shade-intolerant Liriodendron tulipifera and Liquidambar styraciflua, intermediate-tolerant Quercus velutina, and shade-tolerant Acer barbatum, A. rubrum, Prunus serotina,Ulmus alata, and Cercis canadensis. Contrary to our expectation, shade-intolerant trees did not survive better with CO2 enrichment, and population-scale responses to CO2 were influenced by survival probabilities in low light. CO2 enrichment did not increase rates of sample biomass accumulation for most species, but it did stimulate biomass growth of shade-tolerant taxa, particularly Acer barbatum and Ulmus alata. Our data suggest a small CO2 fertilization effect on tree productivity, and the possibility of reduced carbon accumulation rates relative to today's forests due to changes in species composition.
    Description: This research was supported by the Office of Science (BER), U.S. Department of Energy, Grant No. DE-FG02-95ER62083, and by Terrestrial Ecosystems and Global Change (TECO) Grant No. DE-F602-97ER62463.
    Keywords: Bayesian analysis ; Carbon dioxide (CO2) enrichment ; Forest succession ; Global change ; Hierarchical Bayes
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 6
    Publication Date: 2022-05-25
    Description: Author Posting. © The Authors, 2009. This article is posted here by permission of NRC Research Press for personal use, not for redistribution. The definitive version was published in Canadian Journal of Fisheries and Aquatic Sciences 66 (2009): 1399-1403, doi:10.1139/F09-115.
    Description: Despite many years of study and protection, the North Atlantic right whale (Eubalaena glacialis) remains on the brink of extinction. There is a crucial gap in our understanding of their habitat use in the migratory corridor along the eastern seaboard of the United States. Here, we characterize habitat suitability in migrating right whales in relation to depth, distance to shore, and the recently enacted ship speed regulations near major ports. We find that the range of suitable habitat exceeds previous estimates and that, as compared with the enacted 20 nautical mile buffer, the originally proposed 30 nautical mile buffer would protect more habitat for this critically endangered species.
    Description: This work was supported in part by SERDP/DoD grant W912HQ-04-C-0011 to A.J. Read and P.N. Halpin as well as a James B. Duke Fellowship and a Harvey L. Smith Dissertation Year Fellowship to R.S. Schick.
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 7
    Publication Date: 2022-05-25
    Description: Author Posting. © Ecological Society of America, 2008. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecology 89 (2008): 585–587, doi:10.1890/07-0660.1.
    Description: This work was supported by the Office of Science (BER), U.S. Department of Energy, Grant Number DE-FG02-95ER62083 and Terrestrial Ecosystems and Global Change (TECO) Grant Number DE-F602-97ER62463.
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 8
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: Genetic variation in plant response to atmospheric carbon dioxide (CO2) may have influenced paleo-vegetation dynamics and could determine how future elevated CO2 drives plant evolution and ecosystem productivity. We established how levels of relatedness – the maternal family, population, and provenance – affect variation in the CO2 response of a species. This 2-year growth chamber experiment focused on the germination, growth, biomass allocation, and survivorship responses of Acer rubrum to four concentrations of CO2: 180, 270, 360, and 600 μL L−1– representing Pleistocene through potential future conditions. We found that all levels of relatedness interacted with CO2 to contribute to variation in response. Germination responses to CO2 varied among families and populations, growth responses depended on families and regions of origin, and survivorship responses to CO2 were particularly affected by regional identities. Differences among geographic regions accounted for 23% of the variation in biomass response to CO2. If seeds produced under subambient CO2 conditions behave similarly, our results suggest that A. rubrum may have experienced strong selection on seedling survivorship at Pleistocene CO2 levels. Further, this species may evolve in response to globally rising CO2 so as to increase productivity above that experimentally observed today. Species responses to future atmospheric CO2 and the accompanying biotic effects on the global carbon cycle will vary among families, populations, and provenances.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Global change biology 2 (1996), S. 0 
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: Recent predictions that tropospheric aerosols have counterbalanced greenhouse warming assume aerosol emissions were low before ad1850 and then increased dramatically with industrialization of the Northern Hemisphere and biomass burning in the Tropics. We assembled the lake sediment record of emissions across northeastern North America, where temperatures are predicted to have been substantially affected by industrial aerosols. Sediment evidence suggests a systematic shift in source and an overall decline in emissions since the 19th century. The geographical shift results from high presettlement emissions from wildfires in the Midwest that collapsed with tillage and fire suppression. Meanwhile, emissions were increasing in the North-east with European settlement. These regional changes produced a shift from the continental interior to the North-east. An overall decline results because decreases in the Midwest more than compensate for increases in the North-east. Results suggest the Central Plains as an important source of emissions in the recent past, consistent with pioneer accounts of dense smoke clouds emanating from prairie in the 19th century. Contrary to recent models that suggest increased 20th century combustion emissions could have offset warming effects of rising greenhouse gases, our data suggest that aerosols could have actually decreased over this interval. Although we cannot directly quantify aerosols from our methods, the emissions of large particles suggest assumptions of 20th century aerosol declines should be reconsidered.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1939
    Keywords: Key words Photosynthesis ; C4 ; Climate change ; CO2 ; Grassland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract C4 photosynthetic physiologies exhibit fundamentally different responses to temperature and atmospheric CO2 partial pressures (pCO2) compared to the evolutionarily more primitive C3 type. All else being equal, C4 plants tend to be favored over C3 plants in warm humid climates and, conversely, C3 plants tend to be favored over C4 plants in cool climates. Empirical observations supported by a photosynthesis model predict the existence of a climatological crossover temperature above which C4 species have a carbon gain advantage and below which C3 species are favored. Model calculations and analysis of current plant distribution suggest that this pCO2-dependent crossover temperature is approximated by a mean temperature of 22°C for the warmest month at the current pCO2 (35 Pa). In addition to favorable temperatures, C4 plants require sufficient precipitation during the warm growing season. C4 plants which are predominantly graminoids of short stature can be competitively excluded by trees (nearly all C3 plants) – regardless of the photosynthetic superiority of the C4 pathway – in regions otherwise favorable for C4. To construct global maps of the distribution of C4 grasses for current, past and future climate scenarios, we make use of climatological data sets which provide estimates of the mean monthly temperature to classify the globe into areas which should favor C4 photosynthesis during at least 1 month of the year. This area is further screened by excluding areas where precipitation is 〈25 mm per month during the warm season and by selecting areas classified as grasslands (i.e., excluding areas dominated by woody vegetation) according to a global vegetation map. Using this approach, grasslands of the world are designated as C3, C4, and mixed under current climate and pCO2. Published floristic studies were used to test the accuracy of these predictions in many regions of the world, and agreement with observations was generally good. We then make use of this protocol to examine changes in the global abundance of C4 grasses in the past and the future using plausible estimates for the climates and pCO2. When pCO2 is lowered to pre-industrial levels, C4 grasses expanded their range into large areas now classified as C3 grasslands, especially in North America and Eurasia. During the last glacial maximum (∼18 ka BP) when the climate was cooler and pCO2 was about 20 Pa, our analysis predicts substantial expansion of C4 vegetation – particularly in Asia, despite cooler temperatures. Continued use of fossil fuels is expected to result in double the current pCO2 by sometime in the next century, with some associated climate warming. Our analysis predicts a substantial reduction in the area of C4 grasses under these conditions. These reductions from the past and into the future are based on greater stimulation of C3 photosynthetic efficiency by higher pCO2 than inhibition by higher temperatures. The predictions are testable through large-scale controlled growth studies and analysis of stable isotopes and other data from regions where large changes are predicted to have occurred.
    Type of Medium: Electronic Resource
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