Phillips F M.Environmental tracers for water movement in desert soils of the American Southwest[J].Soil Science Society of America Journal,1994,58(1):15-24.
[15]
Xu H,Li Y.Water-use strategy of three central Asian desert shrubs and their responses to rain pulse events[J].Plant and Soil,2006,285(1):5-17.
[16]
Callaway R M,Walker L R.Competition and facilitation:a synthetic approach to interactions in plant communities[J].Ecology,1997,78:1958-1965.
[17]
Callaway R M,Brooker R W,Choler P,et al.Positive interactions among alpine plants increase with stress[J].Nature,2002,417:844-848.
[18]
Schenk H J,Holzapfel C,Hamilton J G,et al.Spatial ecology of a small desert shrub on adjacent geological substrates[J].Journal of Ecology,2003,91:383-395.
Skoglund J,Verwijst T.Age structure of woody species populations in relation to seed rain,germination and establishment along the river Dalalven[J].Plant ecology,1989,82:25-34.
[28]
Wiegand T,Gunatilleke S,Gunatilleke N,et al.Analyzing the spatial structure of a Sri Lankan tree species with multiple scales of clustering[J].Ecology,2007,88:3088-3102.