198 



P.J. Webber et al. 



Deciduous Shrub 



i-O tnoittur* ^/ ^^soluble phosphat*'^/ 



Caespitose Grominoid 



to moisture H/ ^C7«olubl« photphati/// 



Single Grominoid 



No Trends 



to moisture /// Z.C7solubl« ptiosphate/// 



Mat Forming Forb 



^1 , ^^ 1 *r 



10 moistur* H/ ^C7solublt phosphat*/// 



Erect Forb 



Evergreen Shrub 



LO moisture M ^Osolubie phosphate/// 



Cushion Forb 

 ^r 1 ^r 



LO moisture /// ^£7soluble phosphate/// 



Bryophyte 



LO moisture /// Z.<7soluble phosphate/// 



Lichen 



LO moisture /// ^(7*oluble phosphote/// 



LO moisture /// Z.Osoluble phosphate/// 



FIGURE 6-6. The relative importance of growth forms within the princi- 

 pal axes of the ordination. The contour values are the sum of relative 

 cover and relative frequency of the growth form. (After Webber 1978.) 



cies with increasing water-logging, and increasing moss growth which 

 buries aboveground plant parts. The ratios and the magnitude of below- 

 ground biomass are similar to those reported by Dennis and Johnson 

 (1970) and Dennis (1977). 



The abundance of the graminoid-dominated vegetation types at the 



