The scientists want to use the data to explain that the wolf population in Yellowstone reached carrying capacity during the 20-year period. Drag one correct answer into each box to support the Years of Rapid Population Growth for Wolves Years 1-9 Years 4-5 Between 140-160 wolves Years 10-12 Years 15-20 Years of Stabilization for Wolf Population Did not occur during study period. Approximate Carrying Capacity of Wolves in Yellowstone Between 20-40 wolves Between 50-75 wolves Between 85-100 wolves

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In 1995, a population of 31 gray wolves was introduced into Yellowstone National Park. The population of the gray wolves fluctuated in the 20-year period after introduction. In 2019 an estimated 80-110 wolves are present in the park.
Wolves, elk, and bison are native to Yellowstone, but the wolves disappeared in the 1920s due to excessive hunting. Wolves are primarily carnivores, and elk and bison are primarily herbivores.
A team of scientists monitored the population of wolves in Yellowstone for the first 20 years after their release.
Number of Individuals
200
180
160
140
120
100
80
60
40
20
0
Number of Individuals
Figure 1. Number of Wolves
in Yellowstone After Release
16,000
14,000
12,000
10,000
8,000
6,000
The scientists also monitored the populations of elk and bison in Yellowstone for the first 20 years after the wolves' release.
Figure 2. Number of Elk
and Bison in Yellowstone
After Wolf Release
4,000
2,000
0
W
2 4 6 8 10 12 14 16 18 20
Years
Source: NPS/Yellowstone Wolf Project
2 4 6 8 10 12 14 16 18 20
Years
Elk
Bison
The scientists want to use the data to explain that the wolf population in Yellowstone reached carrying capacity during the 20-year period. Drag one correct answer into each box to support the
explanation.
Years of Rapid Population Growth for Wolves
Years 1-9
Years 4-5
Between 140-160 wolves
Years 10-12
Years 15-20
Years of Stabilization for Wolf Population
Did not occur during study period.
Approximate Carrying Capacity of Wolves in Yellowstone
Between 20-40 wolves
Between 50-75 wolves
Between 85-100 wolves
Transcribed Image Text:In 1995, a population of 31 gray wolves was introduced into Yellowstone National Park. The population of the gray wolves fluctuated in the 20-year period after introduction. In 2019 an estimated 80-110 wolves are present in the park. Wolves, elk, and bison are native to Yellowstone, but the wolves disappeared in the 1920s due to excessive hunting. Wolves are primarily carnivores, and elk and bison are primarily herbivores. A team of scientists monitored the population of wolves in Yellowstone for the first 20 years after their release. Number of Individuals 200 180 160 140 120 100 80 60 40 20 0 Number of Individuals Figure 1. Number of Wolves in Yellowstone After Release 16,000 14,000 12,000 10,000 8,000 6,000 The scientists also monitored the populations of elk and bison in Yellowstone for the first 20 years after the wolves' release. Figure 2. Number of Elk and Bison in Yellowstone After Wolf Release 4,000 2,000 0 W 2 4 6 8 10 12 14 16 18 20 Years Source: NPS/Yellowstone Wolf Project 2 4 6 8 10 12 14 16 18 20 Years Elk Bison The scientists want to use the data to explain that the wolf population in Yellowstone reached carrying capacity during the 20-year period. Drag one correct answer into each box to support the explanation. Years of Rapid Population Growth for Wolves Years 1-9 Years 4-5 Between 140-160 wolves Years 10-12 Years 15-20 Years of Stabilization for Wolf Population Did not occur during study period. Approximate Carrying Capacity of Wolves in Yellowstone Between 20-40 wolves Between 50-75 wolves Between 85-100 wolves
The scientists also tracked the number of elk calves born per 100 elk females compared to the total number of wolves in the park.
Females
Number of Elk Calves
per 100 Adult
Figure 3. Comparison of the
Number of Elk Calves per
100 Elk Females to the Number
of Wolves in Yellowstone
40
30
20
Source: NPS/Yellowstone Wolf Project
10
0
20 40 60 80 100
Number of Wolves
Source: NPS/Yellowstone Wolf Project
Transcribed Image Text:The scientists also tracked the number of elk calves born per 100 elk females compared to the total number of wolves in the park. Females Number of Elk Calves per 100 Adult Figure 3. Comparison of the Number of Elk Calves per 100 Elk Females to the Number of Wolves in Yellowstone 40 30 20 Source: NPS/Yellowstone Wolf Project 10 0 20 40 60 80 100 Number of Wolves Source: NPS/Yellowstone Wolf Project
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