Hydraulic traits and tree-ring width in Larix sibirica Ledeb. as affected by summer drought and forest fragmentation in the Mongolian forest steppe

Table 3 Response of the tree-ring index, tracheid diameter (d), hydraulically weighted mean tracheid diameter (d_h), tracheid density (TD), and potential sapwood area-specific hydraulic conductivity (K_p) of Larix sibirica trees from different stand size classes to monthly temperature and precipitation of the year of and the year prior to tree ring formation

	Temperature							Precipitation
	Prior year						Current year	Prior year									Current year
	3	4	5	6	7	8	4	3	4	5	6	7	8	10	11	12	2	3	5	6
Tree-ring index:
F1								□			●		●		●
F2											●		●		○					○
F3								□			●	○	●		●
F4													●
Tracheid diameter (d):
F1													●		○	●
F2										○	●		●
F3															○
F4						□	○	■	●				●
Hydraulically weighted tracheid mean diameter (d_h):
F1													○
F2											●		●		○
F3													●	■		●	□		●	●
F4		○			●	■		■	●				●
Tracheid density (TD):
F1				□									■
F2										□	■		■	□	■
F3													■	○	□
F4	□		●		■	●					○		■			○		○
Potential sapwood area-specific hydraulic conductivity (K_p):
F1													●
F2										●	●		●		●
F3										○				□	●
F4						□		■	●				○

Correlation significant (P ≤ 0.05): ● positive, ■ negative correlation; marginally significant (P ≤ 0.10): ○ positive, □ negative correlation. Months are identified with numbers 1 to 12; months without correlation are not listed

ISSN: 1297-966X