mpact of Feral Swine on Populations of Native Black Bears and Sea Turtles

Question

Read this passage before answering any questions.

In many locations across the United States, invasive feral swine (also called wild hogs) have damaged ecosystems and populations of native animals. Feral swine often outcompete native species for resources. For example, feral swine often outcompete native black bears for food supplies, like berries and other vegetation. In addition, feral swine prey on the eggs of some native species. As an example, feral swine will often find the nesting areas used by sea turtles and will dig up and eat the buried eggs. Because of their harmful effects on native ecosystems, hunters and wildlife management officials work hard to remove feral swine in areas where they are invasive. The following graph shows the impact an increasing feral swine population can have on bear populations and on the success rates of sea turtle nests, and it also shows the impact on bear populations and sea turtle nesting success when the feral swine are removed from the area.

Carefully examine the graph. Make sure to read the title, axis labels, and legend (key) labels.

Question 1
1. Which one of the following represents the food web relationships among berries, black bears, and feral swine? Make sure to pay close attention to the directions of the arrows.

(1 point)
Responses

A
A

B
B

C
C

D
D
Question 2
2. How does the graph show the impact of an increasing feral swine population on sea turtle nesting success?(1 point)
Responses

When the feral swine line goes up, the sea turtle nesting success line goes up.
When the feral swine line goes up, the sea turtle nesting success line goes up.

When the feral swine line goes up, the sea turtle nesting success line is unchanged.
When the feral swine line goes up, the sea turtle nesting success line is unchanged.

When the feral swine line goes down, the sea turtle nesting success line goes down.
When the feral swine line goes down, the sea turtle nesting success line goes down.

When the feral swine line goes up, the sea turtle nesting success line goes down.
When the feral swine line goes up, the sea turtle nesting success line goes down.
Question 3
3. Use the drop down menus to complete the paragraph describing the impact of removing feral swine from the area.(6 points)
Hunters and wildlife officials work together to
the population of feral swine. Feral swine are invasive
of sea turtle eggs and invasive
of black bears. When feral swine are successfully
the area by the hunters and wildlife officials, the sea turtle nesting success rate
. In addition, removal of feral swine allows the black bear population to
.
Question 4
4. What part of the graph tells you which line represents which population?(1 point)
Responses

title
title

y axis label
y axis label

x axis label
x axis label

legend (key)
legend (key)
Question 5
Consider the following two graphs, which show the relationship between bears and swine. In one graph, the bears and swine are in different habitats for the entire time period. In the second graph, invasive swine eventually enter the bear habitat so that they are forced to share the same habitat.

5. What happens to the success rate of black bears when invasive swine enter their native habitat?

(1 point)
Responses

The black bears outcompete the invasive swine.
The black bears outcompete the invasive swine.

The black bears and invasive swine have similar success rates.
The black bears and invasive swine have similar success rates.

The invasive swine outcompete the black bears.
The invasive swine outcompete the black bears.

The black bears have an increased success rate.
The black bears have an increased success rate.
Question 6
6. What type of relationship do black bears and feral swine have?(1 point)
Responses

commensalism
commensalism

mutualism
mutualism

predator-prey
predator-prey

parasitism
parasitism

competition

Answer 1

Certainly! Here are the answers to the questions based on the provided passage:

Question 1

1. Which one of the following represents the food web relationships among berries, black bears, and feral swine?

• Response: Choose the option (A, B, C, or D) that correctly depicts berries being a food source for black bears while feral swine compete for the same resource (assuming such options are labeled accordingly).

Question 2

2. How does the graph show the impact of an increasing feral swine population on sea turtle nesting success?

• Response: When the feral swine line goes up, the sea turtle nesting success line goes down.

Question 3

3. Use the drop down menus to complete the paragraph describing the impact of removing feral swine from the area.

• Hunters and wildlife officials work together to reduce the population of feral swine. Feral swine are invasive predators of sea turtle eggs and invasive competitors of black bears. When feral swine are successfully removed from the area by the hunters and wildlife officials, the sea turtle nesting success rate increases. In addition, removal of feral swine allows the black bear population to thrive.

Question 4

4. What part of the graph tells you which line represents which population?

• Response: legend (key)

Question 5

5. What happens to the success rate of black bears when invasive swine enter their native habitat?

• Response: The invasive swine outcompete the black bears.

Question 6

6. What type of relationship do black bears and feral swine have?

• Response: competition

These answers should align with the expectations based on the information provided in the passage.