Biology Reference
In-Depth Information
dead trees, construction timbers at archeological sites, and fossil woods, to
give a continuous year-by-year record back nearly 10,000 years. Dendro-
chronology, the study of tree rings (I, 128-31) provides information about
trends in climate (Esper et al. 2002), fi re and hurricane history, volcanic
events (D'Arrigo and Jacoby 1999), waves of insect infestation, and epi-
Figure 2.7
Cross-section of bristlecone pine (
Pinus aristata
) showing light spring wood and
dark summer wood of the annual rings. Photograph courtesy of Charles W. Stockton.
