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Regime Detection Measures for the Practical Ecologist
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Regime Detection Measures for the Practical Ecologist. |
| 개인저자 | Burnett, Jessica Leigh. |
| 단체저자명 | The University of Nebraska - Lincoln. Natural Resource Sciences. |
| 발행사항 | [S.l.]: The University of Nebraska - Lincoln., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 245 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-04B. Dissertation Abstract International |
| ISBN | 9781088393581 |
| 학위논문주기 | Thesis (Ph.D.)--The University of Nebraska - Lincoln, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
Includes supplementary digital materials. Advisor: Allen, Craig R. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Forecasting undesirable change is, arguably, the holy grail of ecology. Paired with an understanding of system interactions, a forecast is ideal if it provides reliable predictions in sufficient time to prevent or mitigate unwanted systemic change. Early warning systems (or early warning signals, early warning indicators) have been developed and tested for some ecological systems data, but have been mostly applied to marine fisheries time series and nutrient loadings in shallow lakes. Despite the numerous quantitative methods proposed for identifying or forecasting regime shifts in ecological data, few are used in practice. This dissertation contributes to our understanding of the utility and limitations of early warning systems for ecological regime shift detection, referred to here as 'regime detection measures'. Using both theoretical and empirical data, I evaluate the efficacy of multivariate regime detection measures in identifying abrupt shifts in ecological communities over time and across space. I also introduce a method which I refer to as 'velocity' (of a system's trajectory in phase space) as a potential regime detection measure. Using resampling techniques, I find the velocity method is more robust to data loss and data quality than are the Fisher Information and Variance Index methods which have been previously applied to empirical systems data. This dissertation demonstrates that, while potentially useful, regime detection metrics are inconsistent, not generalizable, and are currently not validated using probabilities or other statistical measurements of certainty. |
| 일반주제명 | Ecology. Wildlife management. Environmental science. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
