Min imum Samples for D istr ibution Pa tterns of Na tura lKorean Pine Broad2leaved Forest
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1.
Research Institute of Forestry, CAF
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2.
Key Laboratory of Tree Breeding and Cultivation, State ForestryAdministration,Beijing 100091, China
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3.
Guizhou Forestry Survey and Planning Institute, Guiyang 550003, Guizhou, China
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Received Date:
2006-02-15
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Abstract
Angle indexwas used to identify tree spatial distribution patterns of natural Korean p ine broad-leaved forest, while modelswere emp loyed to fit the relationship s between the number of samp ling points and p robabilities thatthe identified tree spatial patterns coincide with the actuality, and then the number of samp ling points atwhich thesecondary derivatives of the fitted equations began to app roach 0 was determined as the minimum samp le for spotchecking tree spatial distribution patterns of this forest. To further validate the rationality of the minimum samp le,data from 9 simulated p lots and 2 Ecuador natural forest p lotswere also analyzed. It showed that the minimum samp le for spot checking tree spatial distribution patterns of natural Korean p ine broad leaved forest should be 49.
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