Trees data were collected on the field
Rings data were collected using the software WindendroTM
Knot geometry was extracted using the ImageJ 1.44 free software, with a Java plug-in ('Gourmand', version 1.01) developed at INRA, Nancy, France.
Data description:
TreeID Tree ID
LogID Log ID
KnotID Knot ID
Year Cambial age
Aget Age of the tree at time t
RWt Annual ring width at time t (mm)
lt Distance from the from the pith of the stem at time t (mm)
GUlen Length of the annual growth unit (m)
GUpos Relative position of the knot initiation point along the annual growth unit (varies from 0 to 1)
RN Annual ring number from the pith of the main stem at the level of each knot
Hk Position of the initiation point of the knot along the stem (ground level = 0) (m)
Azimut Azimut of the knot
Zt Predicted knot vertical position at time t (mm)
Dt Predicted knot diameter at time t (mm)
?Dt Annual increment of the knot diameter from time t-1 to t (mm)
?Zt Annual increment of the vertical position of the knot from time t-1 to t (mm)
KnotRank Rank of the knot along the growth unit
NBR Number of branches per growth unit
DBHt Diameter of the tree at 1.3 m at time t (mm)
SumKnotAreat Sum of knot areas at time t
BasalAreat Tree basal area at time t
KSRt Ratio of total knot area increment to the stem basal area increment at time t
Ht Total height of the tree at time t
HDt Ratio of total tree height to DBH calculated for each year of growth at time t