| 21. | One aspect of trophic levels is called tritrophic interaction.
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| 22. | The trophic level of a fish is the position it occupies on the food chain.
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| 23. | For a systematic treatment of biodiversity within a trophic level, see unified neutral theory of biodiversity.
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| 24. | In addition, fish at higher trophic levels and fish with high fat content accumulate more contaminants.
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| 25. | Since animals are higher on the trophic level, they are less efficient sources of food energy.
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| 26. | Furthermore, the ten percent law shows the inefficiency of energy capture at each successive trophic level.
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| 27. | The pyramid then proceeds through the various trophic levels to the apex predators at the top.
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| 28. | Another example widely studied in aquatic and marine systems is trophic level decline in food webs.
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| 29. | There is also pyramid of numbers which represent the number of organisms in each trophic level.
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| 30. | It has led to disturbance of marine food web or trophic level and reduces marine biodiversity.
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