Tree Species Diversity and Structure Character istics of Q ue rcus a lienavar. acuteserrata Na tural Forest on Xiaolongshan
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1.
Research Institute of Forestry, CAF
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2.
Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration,Beijing 100091, China
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Received Date:
2007-12-28
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Abstract
The paper used spatial structure parameters of the angle index, mingling, neighborhood comparison anddiameter distribution, layer number, species diversity indictor to study the community of Quercus aliena var.acu teserrata natural forest in Baihua Forest Farm on Xiaolongshan. The result showed that the near-virgin forest hada high tree species diversity and its tree species composition was abundant. Besides many common tree species,there are also some rare tree species in the community; its diameter distribution demonstrated the typical unevenOaged forest feature and the pattern of horizontal distribution was random, the angle index value was 0. 489; the treespecies segregation was higher and the average value ofminglingwas 0. 598. In the community, about 78. 6% treespmingling value was 0. 75 or 1; the neighborhood comparison order was B etu la platyphylla > S orbus hupehensis >Toxicodendron vern icif lum > Quercus a liena var. acuteserrata > L indera obtusiloba > Pinus arm andi > Tiliapaucicostata > Carpinus tu rczaninow ii > Acer david ii > S taphy lea holocarpa taking the dbh as the comparisonindictor; in vertical structure the community average layer numberwas 2. 3 and itwas obvious differentiated.
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