Tree ring dating database

31 Jan

The center of these circles, or the absolute core of the tree, is known as the pith.

This can be done by wrapping a tape measure around the tree to find it’s circumference and then dividing that number by 3.14.

Multiply the result by the growth factor for that tree species as given by the International Society of Arboriculture.

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This article is a fully referenced research review to overview progress in unraveling the details of the evolutionary Tree of Life, from life's first occurrence in the RNA-era, to humanity's emergence and diversification, through migration and intermarriage.

By providing shade from the heat of the sun, giving us wood products, and turning carbon dioxide into oxygen, trees play an important role in our society and the Earth’s ecosystem.

From the beginning of history, we have relied on trees of various types to meet our needs.

Much can be learned about a species of tree and its environment by discovering its age, and researchers employ several methods to date trees.

The most common, most accurate way to find the age of a tree is to count the number of rings visible when their trunk is cut horizontally.

Since each ring corresponds to roughly one year of growth, making it possible to get a highly accurate estimate of a tree’s age.

This use of tree-ring dating to find the age of a tree is also known as dendrochronology.

Linked in figure 1 is a high-resolution image of the evolutionary tree of life, from viruses through bacteria and archaea to protista, plants, animals and fungi, with a selection of representative species illustrated.