Research Article

Geographic Patterns and Stand Variables Influencing Growth and Vigor of Populus tremuloides in the Sierra Nevada (USA)

Table 2

Sample stand elevation and aspen tree size and growth summary data for stands located on northern and eastern ( ) or southern and western ( ) sides of the Lake Tahoe Basin. Growth was average annual increment over most recent five years for diameter (DBHI) and stem basal area (BAI).

LocationVariableMeans.d.Min.Max.

North and eastElevation (km)2.220.141.902.42
Dbh (cm)20.399.816.8047.70
Height (m)13.574.645.5026.00
Crown ratio0.590.140.180.84
DBHI (cm year−1)0.250.130.050.66
BAI (cm2 year−1)7.414.501.1620.42

South and westElevation (km)2.140.191.912.38
Dbh (cm)19.6010.646.0055.50
Height (m)14.015.105.4026.50
Crown ratio0.620.130.280.87
DBHI (cm year−1)0.380.180.050.83
BAI (cm2 year−1)9.935.760.9625.63