<<<<<<< HEAD ## Biography

I am a RaMP Fellow in the Landscape Ecology Lab! I am NOT from Philadelphia.

Favorite field site

One amazing place I’d visited during orientation was the Cahaba River in Alabama. - The Cahaba River is the longest free-flowing river in AL at approx. 200 miles. - The Cahaba River is home to the endangered Cahaba Lily. - The River is home to 13 endemic plant and animal species.

Resources

Cahaba River Society US Fish & Wildlife Service Cahaba River Map

Map

library(leaflet)

leaflet() %>% 
  addTiles() %>%     
  addMarkers(lng = -87.0643894, lat = 33.0747889, popup = "Cahaba River National Wildlife Refuge")

Tree Basal Area (for calculation only)

# Example data
dbh_cm <- c(35, 23, 12, NA, 8)  # tree diameters at breast height (cm)
plot_area_ha <- 0.1             # plot area in hectares

# Basal area helper (returns m^2 per tree)
basal_area_m2 <- function(dbh_cm) {
  pi * (dbh_cm / 200)^2
}

# Compute per-tree BA, handle NAs
ba_per_tree <- basal_area_m2(dbh_cm)
ba_per_tree_clean <- ba_per_tree[!is.na(ba_per_tree)]

# Totals
total_ba_m2 <- sum(ba_per_tree_clean)
ba_per_ha <- total_ba_m2 / plot_area_ha

# Output a tidy table and the summary values
out <- data.frame(
  Tree = seq_along(dbh_cm),
  DBH_cm = dbh_cm,
  BA_m2 = round(ba_per_tree, 4)
)

out
##   Tree DBH_cm  BA_m2
## 1    1     35 0.0962
## 2    2     23 0.0415
## 3    3     12 0.0113
## 4    4     NA     NA
## 5    5      8 0.0050
total_ba_m2
## [1] 0.1540951
ba_per_ha
## [1] 1.540951

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