This collection of tree cores is representative of New Zealand beech trees from around the country. Tree cores are extracted to provide information for dendrochronology, the study of tree rings.
Cores are extracted in the field and glued on to mounting trays while green. They are then dried and sanded to observe the rings, which are counted and the ring widths measured under a binoc microscope. The widths and patterns of rings can be used to deduce historical facts about the tree’s life and to give insights into long-term climate patterns.
Counting rings to age trees requires the core to pass through or near the centre of the tree. However, the cores are sampled non-destructively and the tree regrows over the hole.
These cores are part of a unique and valuable sample of tree cores collected by Manaaki Whenua – Landcare Researchers over several decades.
The beech tree core below clearly shows the rings that reveal the tree’s growth rate over time creating a growing library of information.
Tree core artwork
