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- W2358107523 abstract "The distribution patterns of Quercus variabilis population have close relation with spatial measurement yardsticks.Combining the traditional methods and the point-grid method,the paper explores the spatial distributions of Quercus variabilis population in different regions by different measurement yardsticks.It shows that the aggregation density of Quercus variabilis population tends to gradually increase as the sampled area increases.When the sampled area reaches 100 and 200 m 2,the aggregation index I_t and the Cassie index C_A are less than zero in some regions;when the sampled area surpasses 400 m 2,the aggregation index I_t and the Cassie index C_A are less than zero in some regions;when the sampled area surpasses 400 m 2,the aggregation index I_t and the Cassie index C_A are more than zero,the average crowding degree m * is equal to or more than one,and the Lloyd index and the Morisita index I_δ are more than one.It conducts the F distribution test of the Morisita index I_δ for significance,showing that when the sampled area reaches 400 m 2,Quercus variabilis population displays an aggregated distribution.Meantime,it carries out Taylor and Iwao model regressions of Quercus variabilis population existing on the sampled sites of different ateas,revealing that the coefficient b of Taylor model changes from less than one with the sampled areas at 100 and 200 m 2 to more than one with the sampled area at 400 m 2,and the parameters α and β of Iwao model both appear more than zero and one,respectively,which illustrates that the distribution patterns of Quercus variabilis population belongs to the aggregated distribution.When the sampled area reaches 600 and 800 m 2,the distribution patterns shows a random distribution." @default.
- W2358107523 created "2016-06-24" @default.
- W2358107523 creator A5018190637 @default.
- W2358107523 date "2005-01-01" @default.
- W2358107523 modified "2023-09-25" @default.
- W2358107523 title "Spatial Distribution patterns of Quercus variabilis Population in Different Regions by Different Measurement Yardsticks" @default.
- W2358107523 hasPublicationYear "2005" @default.
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