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.
Provenance data summaries for black spruce showing: (a) response curves for 39 seed sources (gray), including representative seed sources originating from warm (red), cold (blue), and moderate (green) locations; and (b) distance to optimal MAT for 39 seed sources (black dots), highlighting the same representative seed sources as those shown in Fig. 2a.
