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Worldwide, frog populations are in decline. Several different fungi have been implicated in (thought to be the cause of) decreases in frog numbers. In particular, shrub frogs are especially at risk. You test several different fungi species to see how they affect sample populations of splotched frogs, a close relative of the shrub frog that is not endangered. To do this, you use the different species of fungi to infect populations of splotched frogs and then measure survival rates of these frogs at different frog densities. Frog densities are given in column 1 of the table below. The frog population in column 2 is the control, which was not infected with a fungus. Initial density of frog population (before introduction of Frog survival Frog survival Frog survival Frog survival Frog survival rate rate rate rate rate Control Fungus B. grenchius Fungus Fungus B. sporifera Fungus B. talbuta B. noeltid fungus) Per 1000 m? 10 0.95 0.72 0.83 0.90 0.5 50 0.9 .64 0.82 0.87 0.35 75 0.88 0.66 0.75 0.80 0.54 100 0.9 0.71 0.72 0.72 0.36 150 0.84 0.66 0.63 0.54 0.7 200 0.905 0.68 0.57 0.30 0.41 250 0.89 0.66 0.42 0.13 0.49 Which of the above fungi act(s) in a density-dependent fashion? List them and explain the reasons for your choice(s). Specifically, explain how you can tell which fungi are acting in a density-dependent manner and which fungi are not.

Worldwide, frog populations are in decline. Several different fungi have been implicated in (thought to be the cause of) decreases in frog numbers. In particular, shrub frogs are especially at risk. You test several different fungi species to see how they affect sample populations of splotched frogs, a close relative of the shrub frog that is not endangered. To do this, you use the different species of fungi to infect populations of splotched frogs and then measure survival rates of these frogs at different frog densities. Frog densities are given in column 1 of the table below. The frog population in column 2 is the control, which was not infected with a fungus. Initial density of frog population (before introduction of Frog survival Frog survival Frog survival Frog survival Frog survival rate rate rate rate rate Control Fungus B. grenchius Fungus Fungus B. sporifera Fungus B. talbuta B. noeltid fungus) Per 1000 m? 10 0.95 0.72 0.83 0.90 0.5 50 0.9 .64 0.82 0.87 0.35 75 0.88 0.66 0.75 0.80 0.54 100 0.9 0.71 0.72 0.72 0.36 150 0.84 0.66 0.63 0.54 0.7 200 0.905 0.68 0.57 0.30 0.41 250 0.89 0.66 0.42 0.13 0.49 Which of the above fungi act(s) in a density-dependent fashion? List them and explain the reasons for your choice(s). Specifically, explain how you can tell which fungi are acting in a density-dependent manner and which fungi are not.

Human Anatomy & Physiology (11th Edition)
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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Worldwide, frog populations are in decline. Several different fungi have been implicated in (thought to be the cause of) decreases in frog numbers. In particular, shrub frogs are especially at risk. You test several different fungi species to see how they affect sample populations of splotched frogs, a close relative of the shrub frog that is not endangered. To do this, you use the different species of fungi to infect populations of splotched frogs and then measure survival rates of these frogs at different frog densities. Frog densities are given in column 1 of the table below. The frog population in column 2 is the control, which was not infected with a fungus. Initial density of frog population (before introduction of Frog survival Frog survival Frog survival Frog survival Frog survival rate rate rate rate rate Control Fungus Fungus Fungus B. grenchius Fungus B. sporifera B. noeltid B. talbuta fungus) Per 1000 m2 10 0.95 0.72 0.83 0.90 0.5 50 0.9 0.64 0.82 0.87 0.35 75 0.88 0.66 0.75 0.80 0.54 100 0.9 0.71 0.72 0.72 0.36 150 0.84 0.66 0.63 0.54 0.7 200 0.905 0.68 0.57 0.30 0.41 250 0.89 0.66 0.42 0.13 0.49 Which of the above fungi act(s) in a density-dependent fashion? List them and explain the reasons for your choice(s). Specifically, explain how you can tell which fungi are acting in a density-dependent manner and which fungi are not.
Transcribed Image Text:Worldwide, frog populations are in decline. Several different fungi have been implicated in (thought to be the cause of) decreases in frog numbers. In particular, shrub frogs are especially at risk. You test several different fungi species to see how they affect sample populations of splotched frogs, a close relative of the shrub frog that is not endangered. To do this, you use the different species of fungi to infect populations of splotched frogs and then measure survival rates of these frogs at different frog densities. Frog densities are given in column 1 of the table below. The frog population in column 2 is the control, which was not infected with a fungus. Initial density of frog population (before introduction of Frog survival Frog survival Frog survival Frog survival Frog survival rate rate rate rate rate Control Fungus Fungus Fungus B. grenchius Fungus B. sporifera B. noeltid B. talbuta fungus) Per 1000 m2 10 0.95 0.72 0.83 0.90 0.5 50 0.9 0.64 0.82 0.87 0.35 75 0.88 0.66 0.75 0.80 0.54 100 0.9 0.71 0.72 0.72 0.36 150 0.84 0.66 0.63 0.54 0.7 200 0.905 0.68 0.57 0.30 0.41 250 0.89 0.66 0.42 0.13 0.49 Which of the above fungi act(s) in a density-dependent fashion? List them and explain the reasons for your choice(s). Specifically, explain how you can tell which fungi are acting in a density-dependent manner and which fungi are not.
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