The Problems of Importance Value Calculation and their Solutions in Quantitative Vegetation Ecology
Important Value (IV) is an index to reflect the status and function of one species in a plant community. Two problems of traditional IV calculation were put forward. First, species IVs in different layers were non-comparable because their IVs were calculated independently in their own sample plot. Secondly, traditional IVs couldn’t reflect species’ actual growth situation, which makes the IVs of the same species in different plot non-comparable. Finally, two methods were put forward to resolve these problems: Layer Weight Factor was given to plants IV in different layer in order to compare species IVs in different layer; Plot Coefficient was introduced to IV formula to reflect the actual growth status of a plant in a plot. Additionally, three indices (Inner-Layer Important Value, Inner-Plot Important Value and Real Important Value) were introduced.
Important Value Plant Community Layer Weight Factor Plot Coefficient Inner-Layer Important Value Inner-Plot Important Value Real Important Value
ZHENG Fengying WANG Yusong SHANGGUAN Tieliang
Marine College, Shandong University at Weihai，Weihai, P.R.China, 264209 Department of Applied Mathematics, Shandong University at Weihai，Weihai, P.R.China,264209 School of Environment Science and Resource, Shanxi University, Taiyuan P.R.China, 030006
国际会议
2009 International Institute of Applied Statistics Studies(2009 国际应用统计学术研讨会)
青岛
英文
1-5
2009-07-25（万方平台首次上网日期，不代表论文的发表时间）