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 f scientists monitored the population of wolves in Yellowstone for the first 20 years after their release. Number of Individuals Figure 1. Number of Wolves in Yellowstone After Release 200 180 160 140 120 100 80 N 60 40 20 0 W 2 4 6 8 10 12 14 16 18 20 Years Source: NPS/Yellowstone Wolf Project The scientists also monitored the populations elk and bison Figure ? Number of Elk Yellowstone for the first 20 years after the wolves' release.
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 f scientists monitored the population of wolves in Yellowstone for the first 20 years after their release. Number of Individuals Figure 1. Number of Wolves in Yellowstone After Release 200 180 160 140 120 100 80 N 60 40 20 0 W 2 4 6 8 10 12 14 16 18 20 Years Source: NPS/Yellowstone Wolf Project The scientists also monitored the populations elk and bison Figure ? Number of Elk Yellowstone for the first 20 years after the wolves' release.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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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
Number of Individuals
80
60
40
20
0
Figure 1. Number of Wolves
in Yellowstone After Release
16,000
14,000
12,000
10,000
8,000
6,000
4,000
2,000
0
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
1
40
Number of Elk Calves
per 100 Adult Females
6
Mi
30
20
habe
2 4 6 8 10 12 14 16 18 20
Years
Source: NPS/Yellowstone Wolf Project
The scientists also tracked the number of elk calves born per 100 elk females compared to the total number of wolves in the park.
Figure 3. Comparison of the
Number of Elk Calves per
100 Elk Females to the Number
of Wolves in Yellowstone
2
2 4 6 8 10 12 14 16 18 20
Years
→ Elk
→ Bison
Source: NPS/Yellowstone Wolf Project
20 40 60 80 100
Number of Wolves
Source: NPS/Yellowstone Wolf Project
Transcribed Image Text: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.
Approximate Carrying Capacity of Wolves in Yellowstone
Years of Rapid Population Growth for Wolves
Years 1-9 Years 4-5
Years 10-12
Years 15-20
Years of Stabilization for Wolf Population
Did not occur during study period.
Between 20-40 wolves Between 50-75 wolves Between 85-100 wolves Between 140-160 wolves
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