[1] 123.2228[1] 1[1] "passive"[1] 444.4288[1] 1[1] 1 2 3[1] 88.88576 69.98377 62.76719[1] 1 2 3[1] 11.62238 24.38937 73.89801Biomass vectors (solution)
Exercise
You have data on the diameter of all of the trees in three sites and each site includes a mix of managmeent stratagies. Tree masses can be estimated using diameter based on the equation mass = 0.124 * diameter ^ 2.53. The biomass is the sum of the masses of all the trees at a site. Copy the vectors below into your R script.
site <- c(1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3)
diameter <- c(10.5, 14.2, 13.7, 15.3, 12.8, 9.8, 11.4, 10.9,
12.1, 13.5, 14.7, 8.5, 9.2, 10.1, 11.3, 12.4,
13.6, 14.8)
management <- c("active", "active", "passive", "passive",
"active", "passive", "active", "active",
"passive", "passive", "active", "active",
"passive", "active", "passive", "active",
"passive", "active")Using only the tools we covered in class and the information above, answer the following questions:
- What is the mass of the largest tree, which site is it in, and what is its management status?
- Which site has the greatest total biomass and what is that biomass?
- What is the average mass of a tree in each site?
- What is the difference in total biomass for each site between the “active” management and “passive” management strategies?
Output solution