Table 5. Duncan test grouping for environmental variables affecting standing tree numbers per ha.

Survey order	Mean tree no./ha	Significant grouping	Climate zone	Mean tree no./ha	Significant grouping	Altitude (m)	Mean tree no./ha	Significant grouping
5th	1,059.8	A	CT	1,111.2	A	201-300 m	1,133.7	A
7th	1,031.4	A	WT	1,081.3	AB	301-400 m	1,068.8	A
6th	1,018.6	A	NT	976.5	B	101-200 m	1,033.2	A
-	-	-	ST	832.1	C	>100 m	956.1	A

(note) NT: northern temperate zone, CT: central temperate zone, ST: southern temperate zone, WT: warm temperate zone.