Review Test_2: Earth's System and Biosphere

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What is overfishing?

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Overfishing is the practice of catching fish at a rate faster than they can reproduce, leading to a decline in fish populations and disruption of marine ecosystems.

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What is the role of decomposers in an ecosystem?

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Decomposers break down dead organisms and waste, returning essential nutrients to the soil, which supports plant growth and maintains ecosystem health.

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What is ocean acidification?

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Ocean acidification is the decrease in pH levels of the ocean caused by the absorption of excess carbon dioxide from the atmosphere, affecting marine life.

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How do invasive species impact native ecosystems?

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Invasive species can outcompete native species for resources such as light, water, and nutrients, leading to a decline in native biodiversity.

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What is a food web?

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A food web is a complex network of feeding relationships among various organisms in an ecosystem, illustrating how energy and nutrients flow.

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What are primary producers?

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Primary producers are organisms, such as plants and algae, that produce their own food through photosynthesis and serve as the base of the food web.

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What is nutrient cycling?

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Nutrient cycling is the process by which nutrients are exchanged between living organisms and the environment, ensuring the availability of essential elements for life.

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What is marine biodiversity?

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Marine biodiversity refers to the variety of life forms in ocean ecosystems, including the diversity of species, genetic variation, and ecosystem diversity.

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What is coral bleaching?

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Coral bleaching occurs when corals lose their symbiotic algae due to stress factors like temperature changes, leading to a loss of color and vitality.

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What is the significance of food chains?

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Food chains illustrate the direct transfer of energy from one organism to another, showing how energy flows through an ecosystem.