Which term describes a factor that limits population growth or distribution in an environment?

Prepare for the IB Marine Science SL Exam. Use flashcards and multiple-choice questions with detailed explanations. Master marine ecosystems, ocean currents, and biological resources for success!

Multiple Choice

Which term describes a factor that limits population growth or distribution in an environment?

Explanation:
A limiting factor is anything in the environment that restricts how large a population can grow or where it can live. It can be a resource like food, space, or oxygen, or a condition like temperature, salinity, or predation pressure. When a limiting factor becomes scarce or pronounced, population growth slows and distributions shrink, guiding the population toward the environment’s carrying capacity. For example, limited food availability can cap fish numbers in a reef, while suitable habitat space limits how many can occupy an area. The other terms describe different ideas: a food web is the network of who eats whom, hydrostatic pressure is the force exerted by fluids, and a heterotroph is an organism that must consume organic matter.

A limiting factor is anything in the environment that restricts how large a population can grow or where it can live. It can be a resource like food, space, or oxygen, or a condition like temperature, salinity, or predation pressure. When a limiting factor becomes scarce or pronounced, population growth slows and distributions shrink, guiding the population toward the environment’s carrying capacity. For example, limited food availability can cap fish numbers in a reef, while suitable habitat space limits how many can occupy an area. The other terms describe different ideas: a food web is the network of who eats whom, hydrostatic pressure is the force exerted by fluids, and a heterotroph is an organism that must consume organic matter.

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