| 31. | "Heterosigma " forms massive golden tides that impact the survival of organisms at every trophic level.
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| 32. | This energy expended for growth and reproduction constitutes to the net production of trophic level 1.
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| 33. | Hairston, Smith and Slobodkin feuded that the ecological communities acted as food chains with three trophic levels.
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| 34. | This is due to glacier formation and has implications in how trophic levels interact with limiting nutrients.
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| 35. | Food webs have trophic levels and positions.
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| 36. | Because such species occupy the same trophic level they will potentially or actually compete for similar resources.
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| 37. | The depletion of these trophic levels allow the lower trophic level to overpopulate, or populate very rapidly.
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| 38. | The depletion of these trophic levels allow the lower trophic level to overpopulate, or populate very rapidly.
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| 39. | Population decline continues as ecosystem predator populations compete for a declining population of lower trophic level organisms.
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| 40. | Subsequent models expanded the argument to food chains with more than or fewer than three trophic levels.
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