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2023 | OriginalPaper | Chapter

9. Line Intercept Methods

Authors : George A. F. Seber, Matthew R. Schofield

Published in: Estimating Presence and Abundance of Closed Populations

Publisher: Springer International Publishing

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Abstract

This chapter is related to the previous chapter in that a line transect or transects are used, except that different measurements are taken, namely: (1) the proportion of the line(s) intercepted by the objects (e.g., plants) and (2) the number of objects intercepted, for any shaped object. It is particularly useful when individual plants are not readily distinguishable when they overlap and is commonly used to estimate canopy coverage of shrubs and other low-growing vegetation. The theory depends on how transects are located as using some type of random location avoids the need to assume that particles are randomly distributed. In the past, the two measurements required slightly different theory, but more recently have been incorporated under the same general model. The theory is extended to transects of random length.

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Metadata
Title
Line Intercept Methods
Authors
George A. F. Seber
Matthew R. Schofield
Copyright Year
2023
DOI
https://doi.org/10.1007/978-3-031-39834-6_9

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