| 41. | The second trophic level ( primary consumers ) is occupied by zooplankton which feed off the phytoplankton.
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| 42. | Certain isotopes can signify distinct primary producers forming the bases of food webs and trophic level positioning.
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| 43. | A numbers pyramid shows the relevant number of organisms that each trophic level occupies in an ecosystem.
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| 44. | These sharks occupy tertiary trophic levels.
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| 45. | If one species is significantly depleted, that will have an effect throughout the rest of the trophic levels.
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| 46. | Microalgae is the base of the food web and provide energy for all the trophic levels about it.
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| 47. | A biomass pyramid shows the total mass of the organisms that each trophic level occupies in an ecosystem.
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| 48. | An integrated aquaculture system consists of a number of species at different trophic levels of the food chain.
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| 49. | This energy stored in the organism represents the amount available to be passed on to the next trophic level.
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| 50. | It occurs when two or more species in a habitat affect shared natural enemies in a higher trophic level.
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