It gives an overview of current forest inventory systems and discusses forest mensuration, sampling techniques, remote sensing applications, geographic and forest information systems, and multiresource forest inventory. The book was written as a textbook that clearly explains the sampling methods associated with forest inventory for the practitioner. Different sampling types plans are being applied in modern forest inventory. Forest inventory while an inventory of forest resources does not preclude a census, the sheer magnitude of the task almost always requires the use of sampling techniques. Oct 26, 2007 sound forest management planning requires costefficient approaches to optimally utilize given resources. Forest inventory and analysis sampling and plot design fia fact sheet series 2305 overview. Itto the international tropical timber organization. If the interest attribute y is recorded for all the trees of sik, the ht. Several techniques are available for generating species lists or information on species richness for a site. Sampling designs for national forest assessments food and.
Complete tree measurement implies destructive sampling which, for example, is implemented in stem analysis, but cannot be carried out on a large scale 3. Sampling techniques for forest inventories 1st edition. Multiphase sampling strategies for estimating forest and non forest resources over large areas lorenzo fattorini abstract the multiphase sampling strategies adopted in largescale forest inventories to estimate extents and totals of forest attributes for several forest categories and administrative districts are considered. Basic forest inventory techniques for family forest owners. Ramirezmaldonado has considerable experience in teaching courses in forest sampling, inventory, and modeling as well as consulting for mexican agencies in forest inventory and monitoring. Forest inventory information obtained from the entire forest is called complete or 100% inventory. Sampling design contribution to small area estimation. An estimate of the value and possible uses of timber is an important part of the broader information required to sustain ecosystems. New regression estimators in forest inventories with twophase sampling and partially exhaustive information. Sampling techniques for forest inventories by daniel mandallaz.
An inventory is a cornerstone of forest stewardship. Download sampling methods remote sensing and gis multiresource forest inventory books now. Manual of forest inventory with special reference to mixed tropical forests. It avoids extensive coverage of theoretical statistics and mathematics in favor of thorough coverage of forest inventory topics for the practitioner. A regeneration indicator for forest inventory and analysis. Sampling methods for multiresource forest inventory wiley. Pdf comparison of clustersampling techniques for forest.
Forest inventory and sampling designs moderator usda forest. Comparison of cluster sampling techniques for forest inventory in southern nepal. Each can be used in conjunction with stratified sampling or double sampling for stratification. Sampling techniques for forest inventories 1st edition daniel man. Comparison of methods used in european national forest. Forest inventories in national forestry authority by elungat odeke david coordinator inventory and surveys background. In many cases in forestry it is too expensive or difficult to measure what you want e. Sampling techniques for forest resource inventory wiley. Variableradius sampling techniques are commonly used in the southeastern us. Forest inventory methodology and applications annika. Sampling and plot design forest inventory and analysis. Designed to aid readers in gathering the most reliable quantitative information on forests for the least cost. This study aimed to evaluate the estimator of the variance. Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation without intent to infringe.
The sampling design and plot design used are key to precise estimates of change. Gary brand for more information about the fia program. Canadas national forest inventory ground sampling guidelines. The model forest was a map representing stem volumes in order to compare different sampling techniques for forest inventory in southern nepal. When taking forest inventory the following are important things to measure and note. Multiphase sampling strategies for estimating forest and non forest resources over large areas remaining 1n. Manual of forest inventory food and agriculture organization of the. Generally applied methods for inventorying forest stands include point sampling also known as variableradius plot sampling and fixed plot sampling.
Emphasizing the mathematical and statistical features of forest sampling to assess classical dendrometrical quantities, sampling techniques for forest inventories. Special considerations for tropical forest inventories. Several of the topics discussed such as point and 3p sampling were developed specifically for timber inventory. Forest inventories are used to estimate the resources that exist on a site and aim to balance both accuracy and precision while minimizing time and cost. The fia program collects, analyzes, and reports information on the status, trends, and condition of americas forests. First, we present the basic sampling designs at a fairly nontechnical mathematical level. Grotta, and chris schnepf introduction an inventory is a cornerstone of forest stewardship planning that not only ensures your forest is healthy and productive, but can meet your objectives as a landowner for years to come. Forest inventory and sampling forestryencyclopedia. Request pdf sampling techniques for forest inventories sound forest management planning requires costefficient approaches to optimally utilize given. If each point is visited on the ground and a plot of fixed size a is delineated around the point, then for each polygon i, a sample of trees from uk, say sik, is obtained. A 20 basal area factor baf is used regularly to select sample trees where each sample tree. Thoroughly explains the interrelationships between sampling strategies. Introduction this field manual contains definitions and procedures used to plan and perform a national forest inventory and assessment following the approach developed by the forest resources assessment programme fra of the fao. Sampling techniques for forest inventories request pdf.
In forest inventories, the definition of the sample population is generally based. The sampling methods were compared a in their overall precision in terms of estimating diversity indices and b in their ability to provide precise estimations for three different forest types independent of the spatial inventory scale, e. Examples are used extensively throughout the book to illustrate various estimators and to demonstrate different uses for sampling methods. Species composition and assessment of sampling methods aaron m. Ernst teaches numerous short courses in forest inventory and sampling and provides consultation on such methods to. Forest inventory is the systematic collection of data and forest information for assessment or analysis. Elementary forest sampling this is a statistical cookbook for foresters. Clearly explains the sampling methods associated with the inventory of forest resources. Measurement of crops determination of diameter, height, age and volume of crops sample plots and methods of volume measurement estimation of growth.
Sampling designs in forest inventories forest mensuration. Request pdf sampling techniques for forest inventories preface introduction and terminology sampling finite populations. Examples, used extensively throughout the text, illustrate various estimators, demonstrating different applications for sampling techniques. Methods applicable to specific situations, depending on stand conditions and objectives of the inventory, include strip sampling, line transect sampling, croptree inventory, and the zigzag. The main objective of applying different sampling types is to achieve. Double sampling or twophase is one of the most frequently used sampling design, characterized by its costefficiency for inventories in large remote forest areas 4,5,7,9,14,15 and 16 section. Sampling methods for estimating change in forest resources. A total enumeration of large forest tracts is not feasible and prohibitively expensive 2. Nelson is a research forester with the forest inventory and analysis program, northern research station, u. Sampling techniques for forest inventories pdf free download. Spatial autocorrelation, linear trend, model based, design biased, matern variance, successive difference replication variance, geary contiguity coefficient, random site effects introduction forest inventories have a long history of using systematic. There is an increasing need to use national or regional inventories for local estimations 4, particularly reliable forest attribute information is needed at different geographical. In sampling, a part of a population is selected and used to obtain estimates of characteristics of that population. It presents some sampling methods that have been found useful in forestry.
In proceedings of the ilvessalo symposium on national forest inventories, 1992 august 1721, helsinki, finland, res. Selective or opportunistic sampling is an example of nonrandom sampling used in forest inventory work. The methodology, based on nationwide field sampling, has. Abstract national forest assessments are best conducted with sufficiently accurate and scientifically defensible estimates of forest attributes. Emphasizing the mathematical and statistical features of forest sampling to assess classical dendrometrical quantities, sampling techniques for forest inventories presents the statistical concepts and tools needed to conduct a modern for. Statistically designed forest inventories were introduced simultaneously in three. Sampling methods, remote sensing and gis multiresource. Sampling methods, remote sensing and gis multiresource forest. The sampling technique commonly used in forest inventories is the systematic sampling. Comparison of clustersampling techniques for forest.
In contrast, when the measurements are taken from a representative sample of the forest it is a sampling inventory. Forest inventory a challenge for statistics tilastokeskus. Canadian council of forest ministers sd387 s86 c36 2008 333. These goods may vary from commercial tree volume in board feet or cubic meters, to animals, any product other than timber, sites of interest for tourism, etc. Comparison of estimators of variance for forest inventories. Basic forest inventory techniques for family forest owners by kevin w.
Clusters are frequently used in forest inventories of large areas, such as regional or national inventories, especially in remote areas with difficult access or long distances between plots. The current chapter gives an overview on sampling methods applied in the scope of forest inventories, describes their general approaches and estimation procedures, and discusses advantages and disadvantages of the individual designs. Sound forest management planning requires costefficient approaches to optimally utilize given resources. The paper studies the possibility of using the stratified sampling in forest inventory. Forest inventory techniques double sampling what is it. Sampling techniques for forest inventories by daniel. Designbased properties of some smallarea estimators in forest inventory with twophase sampling. Forest inventories for carbon change assessments sciencedirect. Sampling methods remote sensing and gis multiresource forest. Problems with answers are also included at the end of each chapter. The technique of average and total volume assessment is explained in the example of one. Emphasizing the mathematical and statistical features of forest sampling to assess classical dendrometrical quantities, sampling techniques for forest inventories presents the.
Sampling techniques for forest inventories daniel mandallaz. Plot designs can involve variableradius or bitterlich sampling for trees, and fixedarea plots for most attributes. Those include for instance problems with systematic sampling, and methods for sampling vegetation or rare populations. Emphasizing the mathematical and statistical features of forest sampling to assess classical dendrometrical quantities, sampling techniques for forest inventories presents the statistical concepts and tools needed to conduct a modern forest inventory. Precise and up to date information on the forest area as well as on the quality, quantity and distribution of the growing stock the trees in forests is the primary basis for determining their production potential for management. Statistical techniques for sampling and monitoring. The information requirements regarding the forest resource are as manifold as are the interests in forest as an ecosystem. Utilizing a multisource forest inventory technique, modis data. Apr 26, 2007 forest inventory and sampling design bastiaan louman a forest inventory enumerates all goods of interest to a forest manager in a previously determined forest area. Using doublesampling techniques to reduce the number of. Evolving from strip surveys that apparently originated in scandinavia and elsewhere in northern europe, many forest sampling designs rely on the random or systematic. C e rapid inventory of the ant assemblage in a temperate. Guidelines on national inventory of village forests cifor.
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