Tumacacori Hackberry

The long version of the title is "Riparian Thresholds: Using Dendrochronological Metrics to Evaluate Change". The main objective is to pioneer the use of Netleaf Hackberry (Celtis reticulata) as a dendrochronological indicator of riparian health and riparian climate/growth relationships.

• Develop hackberry chronologies from trees located on public and private land in the Santa Cruz, San Pedro, and Gila River watersheds
• Explore dependency of ring width on tree age/size and the possibility of developing regional curves summarizing the dependency
• Explore density differences in the early and late wood in each ring to measure for irregularities in wood density development trends as related to winter and monsoon precipitation patterns
• Map water/tree growth relationships through time and space along the river
Support and extend the tree ring water availability analysis by utilizing a simple regional water budget to understand how the system's water budget may have varied over the recent past beyond available stream gauging records