WolvesElkWillow4. The top two graphs show how the populationof wolves and the population of elk changedfollowing the introduction of wolves intoYellowstone National Park.The third graph shows trends in the amount ofgrowth of willows (data for annual growth ringsize from two different studies).Fill in the table below for each organism:State whether population size or amount ofgrowth generally decreased, increased, orstayed the same.Explain a likely reason for each trend. Use theinformation from the food web to understandthe trends in elk population and willow growth.If an increase in a predator population results ina decrease in an herbivore population which inturn results in an increase in plant growth, thistype of effect is called a trophic cascade.cb amalgnodisoTrend in population sizeor amount of growthPopulationPopulation (Thousands)12010080Ring area (mm2)604020O201510$201510-50A WolvesB ElkF Willow199019952015082000YearNEE)Explanation for this trend48

A trophic cascade is an ecological phenomenon in which a population in the food chain reduces…

Answered: Wolves Elk Willow Trend in population…

Science

Biology

Wolves Elk Willow Trend in population size or amount of growth Explanation for this trend

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter44: Population Ecology

Section: Chapter Questions

Problem 13SQ: Match each term with its most suitable description. _____ carrying capacity a. maximum rate or...

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Concept explainers

Population Growth

R and K Selection

R and K selection are concepts in ecology used to describe traits in the fluctuation of a population or population dynamics. For example, they describe the life-association traits between parent and offspring, such as quantity or number of young ones born at a time, quality of parental care, the age to maturity, and reproductive effort.

Question

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)
Explanation for this trend
48

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Describe what a pyramid of numbers would like if an ecologist models the relationship between bird parasites, blue jays, and oak trees in a hectare. Does this match the energy flow pyramid?
Species with limited resources usually exhibit a(n)______ growth curve. logistic logical experimental exponential
In the English Channel ecosystem, the number of primary producers is smaller than the number of primary consumers because.___________ the apex consumers have a low turnover rate the primary producers have a low turnover rate the primary producers have a high turnover rate the primary consumers have a high turnover rate
Pumpkin interactions in the natural community.
Protecting biodiversity 1. Why are each of these types of species often targeted in conservation efforts? (Don’t just define theterms, actually explain “why” biologists might focus on these species!)a. Flagship -b. Keystone -c. Indicator -d. Umbrella - 2. Identify the major concerns associated with captive breeding programs. Are there ways some of theseconcerns can be minimized? 3. Consider 2 isolated chaparral preserves in San Diego. If a functional wildlife corridor was added toconnect these together, what benefits would we expect to see (with respect to plant AND animal life)?
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