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Two reefs are exposed to the black band disease pathogen. Reef A is located in a remote area off a rocky coast that receives little rainfall. Reef B is located near a resort hotel, a heavily fertilized golf course, and a forest that has been recently clearcut for a housing development. Both reefs are dominated by star corals. What is the most likely outcome of the disease on each reef?

A. Reef A will suffer greater damage than reef B.
B. Reef B will suffer greater damage than reef A.
C. Both reefs will suffer equal damage from the disease.
D. Neither reef will be affected because black band disease affects only branching corals.

1 Answer

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Final answer:

Reef B will likely suffer greater damage from black band disease than Reef A due to the additional environmental stress caused by human activities and pollution in its vicinity. Reef A, being in a more remote and less polluted area, may have better resistance to the disease.

Step-by-step explanation:

The question asks about the likely outcome of black band disease on two different coral reefs, Reef A and Reef B. Black band disease is a coral disease characterized by a dark band that moves across coral, leading to tissue death. Reef B is located near multiple sources of pollution and habitat alteration, such as a resort hotel, a fertilized golf course, and a recently cleared forest for housing development. These factors increase the stress on Reef B beyond the disease's presence, making it more likely to suffer greater damage due to the reduced resilience and increased vulnerability to disease. Reef A, however, being in a more remote and presumably less polluted area, is likely to be in a better condition to resist the disease.

Therefore, the most likely outcome is B. Reef B will suffer greater damage than reef A. This answer takes into consideration the environmental stress factors influencing the health of coral reefs, including water quality, human activity, and the additional pressure from the disease pathogen itself. Since black band disease does affect corals, including star corals, and not just branching corals, options A and D are not accurate. Considering that Reef A is in a less stressful environment, option C is unlikely as well. Hence, the presence of human-caused stressors places Reef B at a disadvantage compared to Reef A.

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