First Sentence:
Beginning around 1900 and accelerating greatly in the last 20 years, fish community characteristics have been used to measure relative ecosystem health.
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Key Phrases - Statistically Improbable Phrases (SIPs):
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lithophilic spawners, fish metrics, trophic metrics, water resource integrity, coldwater sites, percent salmonids, total recoverable cadmium, fish assemblage data, percent white suckers, centrarchid species, trophic composition metrics, gillnet samples, percent top carnivores, simple spawners, using fish assemblages, warmwater versions, biological field assessment, numerical biological criteria, sucker species, high biotic integrity, percent simple lithophils, percent green sunfish, wading sites, total recoverable copper, percent omnivores
Key Phrases - Capitalized Phrases (CAPs):
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Ohio River, Environmental Protection Agency, New York, North American, Lake Erie, Invertivore Benthic, Transactions of the American Fisheries Society, Snake River, Red River, Boca Raton, Lake Agassiz Plain, United States, North Dakota, New Jersey, Great Lakes, New England, Ottawa River, Douglas Tailwater, Office of Water, Codorus Creek, Gut Peritoneum Caeca Teeth Plates, Scientific Name, Common Name, Geological Survey, Assessing Biological Integrity
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