Riggle B D.Spatial Statistics.New York:Wiley,1981:10-200.
[14]
Legendre P ,Fortin M.Spatial pattern and ecological analysis.Vegetation,1989,80:107-138.
[15]
Zhang J T.Analysis of spatial point pattern for plant species.Acta Phytoecologica Sinica,1998,22(4):344-349.
[16]
Haase P.Spatial pattern analysis in ecology based on Ripley’s Kfunction: Introduction and methods of edge correction.Journal of Vegetation Science,1995,6:575-582.
[17]
Prentice I C,Werger M J A.Clump spacing in a desert dwarf shrub community.Plant Ecology,1985,63:133-139.
[18]
Rebertus A J,Williamson G B,Moser E B.Fire induced changes in Quercus laevis spatial pattern in Forida sandhills.Journal of Ecology,1989,77:638-650.
[19]
Ripley B D.Modeling spatial pattern.Journal of the Royal Statistical Society: Series B,1977,39:172-212.