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A certain stream ecosystem has clean good quality water A diverse community of aquatic organisms live in this ecosystem Some of these populations are highly sensitive to pollution others are tolerant to some levels of pollution and a few thrive in polluted poor quality water A table listing some of the species in this ecosystem and their tolerance to pollution is shown below Aquatic Species Pollution Tolerance Species Pollution Tolerance mayfly river chub stonefly caddis fly freshwater shrimp bullhead minnow whirligig beetle red shiner sludgeworm rat tailed maggot black fly highly sensitive to pollution highly sensitive to pollution highly sensitive to pollution tolerant to low pollution levels tolerant to low pollution levels tolerant to low pollution levels tolerant to low pollution levels tolerant to low pollution levels thrives in polluted water thrives in polluted water thrives in polluted water Suppose an accidental spill from a wastewater plant upstream caused the water in this ecosystem to become highly polluted Which of the following would most likely occur OA Some populations would decrease in size but the overall biodiversity of the ecosystem would increase OB Most populations would decrease in size but the overall biodiversity of the ecosystem would stay the same OC Most populations would increase in size causing an overall increase in the biodiversity of the ecosystem OD Some populations would increase in size but the overall biodiversity of the ecosystem would decrease

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