Colorado Conservation Summary Statistics

Open-source R program for researchers to summarize relevant 2022 and 2023 survey statistics for a 172,000-acre conservation area in Colorado. Developed with the Yale School of the Environment as part of The Partnership in Forestry and Rangeland Research Program. Uses dplyr, tidyr, and stringr.

To clone this repository:

git clone https://github.com/harley-zhang/Conservation_summary

Plot statistics

Treatment statistics:

• Treatment year: The year each plot was treated.
• Treatment type: Types of treatment used within a plot.

Tree statistics:

• Basal area per acre: Calculates basal area in inches per acre for living trees.
• Average diameter at breast height (DBH): Calculates the average DBH in inches per acre for living trees.
• Average height: Calculates the average height in feet for living trees.
• Dominant tree species: Identifies the dominant tree species per plot, considering survey, frequency, and if the dominant one is less than or equal to 50% frequency, also determines the second-dominant tree species.

Regeneration statistics:

• Regeneration presence: Checks if regeneration (saplings or seedlings) is present in each plot.
• Seedlings per acre: Calculates the number of seedlings per acre.
• Dominant regeneration species: Identifies the dominant regeneration (sapling/seedling) species per plot, considering survey, frequency, and if the dominant one is less than or equal to 50% frequency, also determines the second-dominant regeneration species.

Damage statistics:

• Insect presence: Determines if insect damage is present in each plot (Y/N).
• Browse presence: Identifies if browse damage is present in each plot (Y/N).
• List of damage types: Lists each type of damage present in each plot.

Forest stand statistics

Tree statistics:

• Basal area per acre: Calculates basal area in inches per acre for living trees.
• Average diameter at breast height (DBH): Calculates the average DBH in inches per acre for living trees.
• Average height: Calculates the average height in feet for living trees.
• Dominant tree species: Identifies the dominant tree species in each stand and calculates the number and percent of plots.

Regeneration statistics:

• Regeneration presence: Calculates the number and percent of plots with regeneration (saplings or seedlings) in each stand.
• Seedlings per acre: Calculates the average number of seedlings per acre in each stand.
• Dominant regeneration species: Identifies the dominant regeneration (sapling/seedling) species in each stand and calculates the number and percent of plots.

Damage statistics:

• Insect damage presence:: Calculates the number and percent of plots with insect damage in each stand.
• Browse damage presence:: Calculates the number and percent of plots with browsing damage in each stand.
• List of damage types: Lists all damage present across all plots within a stand.