Sammanfattning

Increment cores with intact tree rings are crucial in dendrochronological investigations to age trees. However, it is not always possible to obtain complete cores from trees because of rot, so alternative methods need to be explored. We tested the collection of one oblique core and one straight core reaching the pith at breast height from 12 sound Scots pine (Pinus sylvestris) trees. We simulated a missing inner part (caused by hypothetical rot) from each straight core, and estimated the trees' ages from both the oblique and straight cores, using several methods. We then compared the estimates to ages obtained from the complete cores, and found that the mean absolute error was lower for estimates from partial straight cores (17.75%) than from oblique cores (47.58%). We then obtained oblique cores from 14 hollow pines affected by rot, to test the applicability of this practice to real rotten trees. We concluded that oblique coring is not suitable for pine trees because of high failure rates of coring attempts and large distances between the cores and chronological centers of the trees' stems. We recommend the collection of two cores aiming straight toward the center of trunk to increase the chances of obtaining an accurate age estimation.

Nyckelord

dendrochronology; tree cores; hollow tree; Pinus sylvestris; method; fieldwork

Publicerad i

Tree-Ring Research
2022, Volym: 78, nummer: 2, sidor: 150-155
Utgivare: TREE-RING SOC

SLU författare

• Baudet, Marlène

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    

• Östlund, Lars

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Skogsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.3959/2021-7

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/118724