ing capacity of the deer in the years 1969-

Moscovy ducks meat production characteristics

recommendations or essay for my ecological footprint, freling intrigued

Wolves Elk Willow 4. The top two graphs show how the population of wolves and the population of elk changed following the introduction of wolves into Yellowstone National Park. The third graph shows trends in the amount of growth of willows (data for annual growth ring size from two different studies). Fill in the table below for each organism: State whether population size or amount of growth generally decreased, increased, or stayed the same. Explain a likely reason for each trend. Use the information from the food web to understand the trends in elk population and willow growth. If an increase in a predator population results in a decrease in an herbivore population which in turn results in an increase in plant growth, this type of effect is called a trophic cascade. cb amalg nodiso Trend in population size or amount of growth Population Population (Thousands) 120 100 80 Ring area (mm2) 60 40 20 O 20 15 10 $ 20 15 10- 5 0 A Wolves B Elk F Willow 1990 1995 201508 2000 Year NEE)…