CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Chapter 41, Problem 6TYU
SCIENTIFIC INQUIRY
An ecologist studying plants in the desert per1ormed the following experiment. She staked out two identical plots, containing sagebrush plants and small annual wildflowers. She found the same five wildflower species in roughly equal numbers on both plots. She then enclosed one of the plots with a fence to keep out kangaroo rats, the most common grain-eaters of the area. After two years four of the wildflower species were no longer present in the fenced plot but one species had increased drastically. The control plot had not changed in species diversity. Using the principles of community ecology, propose a hypothesis to explain her results. What additional evidence would support your hypothesis?
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An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which included a few sagebrush plants and numerous small, annual wildflowers. She found the same five wildflower species in roughly equal numbers on both plots. She then enclosed one of the plots with a fence to keep out kangaroo rats, the most common grain-eaters of the area. After two years, to her surprise, four of the wildflower species were no longer present in the fenced plot, but one species had increased dramatically. The control plot had not changed. Using the principles of ecology, propose a hypothesis to explain her results. What additional evidence would support your hypothesis?
An ecologist studying desert plants performed the following experiment. She staked out two identical plots that included a few sagebrush plants and numerous small annual wildflowers. She found the same five wildflower species in similar numbers in both plots. Then she enclosed one of the plots with a fence to keep out kangaroo rats, the most common herbivores in the area. After two years, four species of wildflowers were no longer present in the fenced plot, but one wildflower species had increased dramatically. The unfenced control plot had not changed significantly in species composition. Using the concepts discussed in the chapter, what do you think happened?
上午11:08 1月22日周六
* 100%
•..
Low
High
Population Density
Site A
Site B
Unfragmented
Fragmented
85. The graph above shows how seed production in a plant
species varied with population density in an unfrag-
mented habitat (site A) and in a fragmented habitat
(site B). Which of the following conclusions is best
supported by the data?
(A) There is no relationship between seed production
and habitat fragmentation.
(B) Seed production is higher in dense populations.
(C) Seed production is lower in dense populations.
(D) Habitat fragmentation has more effect on seed
production than does population density.
(E) Pollinators are either less abundant or less
effective in small populations.
Seed Production
Chapter 41 Solutions
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
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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