CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 41, Problem 5TYU
Summary Introduction
To draw:
The food web including blue crab and also to explain the fate of Eelgrass when humans stop eating blue crab.
Introduction:
A food web is a graphical representation of feeding relationships among organisms. The blue crab is an omnivore. It eats a primary producer eel grass and also eats clams, a bivalve mollusk. When there is inadequate eel grass available to eat, blue crab also shows cannibalism by eating other juvenile crabs
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In this food web model, plants A, B and C are the autotrophic organisms that serve as the producers of the food web model. The herbivores A, B and C serve as the primary consumers meanwhile the omnivores A and B serve as the secondary consumers of this model. Then, the last level is the top predator. To describe the model formulated, the populations of these organisms, in a particular ecosystem, was recorded over a period of 61 days. It is observed that at Day 0, the plant populations are the highest, which is around 5000. The herbivore populations are found in a range of 2000-3000 and the omnivore populations can be seen to be below 1000. With gradual increase in the number of days, we can see here that the food chain is coming into play. The green plants are being consumed by the herbivores, leading to fluctuations in the plant populations. The herbivores are, in turn, being consumed by the omnivores.
We can see that with increasing time, only…
Design a logical food-web model of the living things in a typical deciduous forest. Producers should form the bottom of the web, with primary consumers and secondary consumers in the middle of the web, and tertiary consumers at the top of the web. Detritivores can be found throughout the web. Draw lines between the organisms that directly interact with each other. Organisms may have more than one line drawn from them or to them. In your model, include the sun, and illustrate how heat is lost as energy transfers from one trophic level to the next.
Producers:
maple tree
dogwood tree
spicebush (flowering shrub)
Jack-in-the-pulpit (flower)
Primary Consumers:
spicebush swallowtail butterfly
honeybee
carpenter ant
Secondary Consumers:
woodpecker
garter snake
flycatcher (inset-eating bird)
Tertiary Consumers:
falcon
screech owl
bobcat
Detritivores:
bacteria
earthworms
flies
fungi
In Florida, mangrove trees grow as part of an intertidal
ecosystem. A simplified model of a food web in a Florida
mangrove
forest is shown.
Heron
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Chapter 41 Solutions
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
Ch. 41.1 - Explain how interspecific competition, predation,...Ch. 41.1 - According to the principle of competitive...Ch. 41.1 - MAKE CONNECTIONS Figure 22.13 illustrates how a...Ch. 41.2 - What two components contribute to species...Ch. 41.2 - How is a food chain different from a food web?Ch. 41.2 - WHAT IF? Consider a grassland with five trophic...Ch. 41.2 - MAKE CONNECTIONS Rising atmospheric CO2 levels...Ch. 41.3 - Why do high and low levels of disturbance usually...Ch. 41.3 - During succession, how might the early species...Ch. 41.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 41.4 - Describe two hypotheses that explain why species...Ch. 41.4 - Describe how an islands size and distance from the...Ch. 41.4 - WHAT IF? Based on MacArthur and Wilsons island...Ch. 41.5 - What are pathogens?Ch. 41.5 - Prob. 2CCCh. 41 - The feeding relationships among the species in a...Ch. 41 - Prob. 2TYUCh. 41 - Prob. 3TYUCh. 41 - Community 1 contains 100 individuals distributed...Ch. 41 - Prob. 5TYUCh. 41 - SCIENTIFIC INQUIRY An ecologist studying plants in...Ch. 41 - FOCUS ON EVOLUTION Explain why adaptations of...Ch. 41 - FOCUS ON INFORMATION In Bateslan mimicry, a...Ch. 41 - Prob. 9TYU
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