Table 4 — Distribution of active ectomycorriiizal root tips (percentage of total in core) 

 among organic matter (litter, humus, decayed wood) volume classes 

 within and between sites; all samples taken during June to July peak 

 activity period (Harvey and others 1978) 



Organic matter volume class 

 (percent) 



number and Mean percent 



acronym of core organic 0-15 16-30 31-45 >45 



Percent 



^lU'^ruwin 













^ /I A f 1 1 Ik 4 \ 



1(WH-M) 



31 



^13^ 



45" 



23" 



19" 



2(SAF-M) 



30 



12^ 



57" 



27" 



5^ 



4(WH-I) 



28 



20 



49 



21 



10 



3(DF-M) 



19 



7^ 



36" 



52" 



4c 



5(WWP-I) 



17 



12 



20 



40 



27 



8(PP-W) 



15 



39 



44 



17 







6(GF-I) 



13 



44 



43 



13 







7(SAF-WY) 



6 



58 







42 







Second-growth 













lO(LPP-i) 



17 



57 



12 



31 







9(MIX-i) 



17 



42 



36 



22 







1 1 (WL-y) 



13 - 



57 



20 



22 







12(DF-i) 



12 







100 











13(PP-i) 



5 



39 



44 



17 







14(LPP-y) 



5 



100 















^See table 1 for explanation of abbreviations. 



^Within the sample used for these calculations (50 cores) no significant differences between 

 treatments could be detected. However, on the three sites for which a larger sample was 

 available (150 cores, Han/ey and others 1981) significant differences were detected within the 

 three sites (a = 0.05), two-sided t-test, differing letters indicate significant differences. 



Table 5— Cumulative depth (centimeters) of organic soil strata and distribution of 



active ectomycorrhizal short roots in organic and mineral strata within and 

 between sites; all samples taken during June to July peak activity period 

 (Harvey and others 1978) 



Site 



number and Cumulative depth/core 

 acronym of organic horizons 



Total ectomycorrhizal 

 short root tips in 



Organic horizons Mineral horizons 

 (all) (all) 



cm - - Percent 



Old-growth^ 









1(WH-M) 



3.8 



=89" 



11" 



2(SAF-M) 



3.5 



93" 



7" 



4(WH-I) 



2.5 



89^ 



11" 



3(DF-M) 



2.3 



76^ 



24a 



5(WWP-I) 



2.0 



93= 



7" 



8(PP-W) 



1.7 



16^ 



84" 



6(GF-I) 



1.5 



70^ 



30= 



7(SAF-WY) 



.7 



71 = 



29^ 



Second-growth 









lO(LPP-i) 



1.9 



82= 



18^ 



9(MIX-i) 



1.8 



89" 



11 = 



1 1 (WL-y) 



1.5 



31 = 



69" 



12(DF-i) 



1.2 



66= 



34^ 



13(PP-i) 



.6 



86= 



14a 



14(LPP-y) 



.5 



76= 



24= 



■•See table 1 for explanation of abbreviations. 



^Differing letters indicate significant differences (o = 0.05) within site, based on two-sided 

 t-test of numbers of short root tips in combined strata. 



6 



