APES Unit 1 Review

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Net primary productivity

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The organic materials that remain after photosynthetic organisms in the ecosystem have used some of these compounds for their cellular energy needs (cellular respiration).

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Commensalism

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A type of relationship where one organism benefits while the other is unaffected, as seen with the cattle egret and herds of cattle.

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Taiga

Back

A biome characterized by cold environments and moderate rainfall, where species like certain trees are adapted.

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Rain forest soil

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Thin and nutrient poor, despite the lush vegetation above.

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Energy loss in energy pyramids

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90% of energy at each level is lost as heat or used by the organism for survival.

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Gross primary productivity

Back

The total amount of organic material produced by photosynthetic organisms before any is used for respiration.

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Secondary productivity

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The generation of biomass by heterotrophic organisms (consumers) in an ecosystem.

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Symbiotic relationships

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Interactions between species that live in close physical proximity, which can be mutualistic, commensal, or parasitic.

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Deciduous forest

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A biome characterized by trees that lose their leaves seasonally, typically found in temperate regions.

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Tropical forest

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A biome known for high biodiversity and dense vegetation, typically found near the equator.