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Distance Measurements in Vegetation Study
Author(s) -
Ashby William C.
Publication year - 1972
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1934321
Subject(s) - vegetation (pathology) , tree (set theory) , sampling (signal processing) , ecology , environmental science , distance sampling , productivity , physical geography , geography , habitat , mathematics , computer science , biology , medicine , pathology , mathematical analysis , macroeconomics , filter (signal processing) , economics , computer vision
Plotless vegetation sampling including the quarter method results in a systematic bias if measurements "to the tree" are used in place of the center of the tree trunk. Widely used references show "to the tree" measurements which lead to overestimates of density, productivity, and other parameters.