Figure 3. Temporal changes in the numbers of trees of different forms.
The relative composition of populations of large trees with cavities in different forms (sensu Figure 2) is shown for 1997–2009.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.