By Robert A. Gitzen, Joshua J. Millspaugh, Andrew B. Cooper, Daniel S. Licht
To supply worthwhile and significant info, long term ecological courses have to enforce stable and effective statistical methods for gathering and studying information. This quantity presents rigorous tips on quantitative concerns in tracking, with contributions from global specialists within the box. those specialists have huge event in educating basic and complicated rules and strategies to common source managers, scientists, and scholars. The chapters current a number of instruments and ways, together with precise insurance of variance part estimation and quantitative choice between substitute designs; spatially balanced sampling; sampling techniques integrating layout- and model-based ways; and complicated analytical ways resembling hierarchical and structural equation modelling. Making those instruments extra obtainable to ecologists and different tracking practitioners throughout a variety of disciplines, this can be a beneficial source for any specialist whose paintings offers with ecological tracking. Supplementary instance software program code is accessible on-line at www.cambridge.org/9780521191548.
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Additional info for Design and Analysis of Long-term Ecological Monitoring Studies
We focus separately on sampling objectives, but this organization is simply to facilitate discussion. ” (Chapter 2) objectives are clearly defined and stated. Collectively, the qualitative and quantitative objectives for monitoring are all-important; many of the criteria discussed in this section are motivated by their value in indicating whether a study has well-defined objectives. (iii) Quantified sampling objectives regarding focal parameters of interest, with clear practical justification for how these were selected (iv) Tied to these objectives, specific description of selected high-priority analyses that are expected to be routinely conducted These two criteria are essential and powerful indicators of whether monitoring practitioners have a clear idea of why they are monitoring.
2005). State and federal agencies collect large amounts of data annually to monitor the status and trends of harvested wildlife populations and other resources. These data fill file cabinets and lead to summaries that are included in annual reports. But otherwise the data are often viewed simply as “management data” without any real appreciation of their potential value. This “collect and neglect” syndrome is unfortunate because there is value, particularly if combined with additional, rigorously collected data.
The design of monitoring programs will continue to improve significantly if a focus on power analyses matures into broader incorporation of such careful, integrative thinking in quantitative study design. Some indicators of a monitoring study that has adequately addressed quantitative issues We have stressed the general importance of quantitative considerations in ecological monitoring. g. Reynolds et al. 2011). Such progress will be based partly on continued general developments in methodology and training, and partly on the collective effort of individual monitoring programs each striving to address concrete quantitative considerations more thoroughly.