Double sampling for stratification in periodic inventories-Infinite population approach
2010 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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- Authors
- Saborowski, Joachim ; Marx, Almuth; Nagel, Juergen; Boeckmann, Thomas
- Abstract
- Double sampling for stratification is a sampling design that is widely used for forest and other resource inventories in forest ecosystems. It is shown that this sampling design can be adapted to repeated inventories including estimators of net change, even for non-proportional allocation of second-phase units and periodically updated stratification. The method accounts for the transition of sampling units among strata. Moreover, it may outperform classical single phase designs if sample plots are appropriately allocated to strata with respect to predefined target variables, here: volume per ha of bigger trees of the main tree species. The latter requires a clear definition of predominant aims of the inventory and an appropriate optimization method. Access to inventory data of a state forest district from two occasions allowed for an optimization of the design based on the first occasion, which proved to be still advantageous on the following occasion. Estimators are developed under the infinite population approach, which is generally deemed more appropriate for forest inventories. (C) 2010 Elsevier B.V. All rights reserved.
- Issue Date
- 2010
- Journal
- Forest Ecology and Management
- Organization
- Fakultät für Forstwissenschaften und Waldökologie ; Büsgen-Institut ; Abteilung Ökosystemmodellierung ; Abteilung Ökoinformatik, Biometrie und Waldwachstum
- ISSN
- 0378-1127
- Language
- English
- Subject(s)
- Continuous forest inventory; Infinite population approach; Multi-purpose optimization; Two-phase sampling for stratification