Question

which of the following statements describes the abundance of species in different regions on earth?

• the greatest abundance of species on earth is found near the equator, but the greatest diversity among species is found in regions furthest from the equator.
• the greatest diversity among species on earth is found near the equator, but the greatest abundance of species is found in regions furthest from the equator.
• the greatest abundance of species and the greatest diversity among species on earth are found in regions furthest from the equator.
• the greatest abundance of species and the greatest diversity among species on earth are found near the equator.

Explanation:

Analyze the question

The question asks which statement correctly describes the abundance and diversity of species in different regions on Earth.

Evaluate ecological patterns

In ecology, the latitudinal diversity gradient is a well-established pattern. It shows that biodiversity (both species richness/diversity and abundance) is highest near the equator (tropical regions) and decreases toward the poles (regions furthest from the equator).

Compare the options

• Option 1: "The greatest abundance of species on Earth is found near the equator, but the greatest diversity among species is found in regions furthest from the equator." (Incorrect: diversity is also highest near the equator).
• Option 2: "The greatest diversity among species on Earth is found near the equator, but the greatest abundance of species is found in regions furthest from the equator." (Incorrect: abundance is also highest near the equator).
• Option 3: "The greatest abundance of species and the greatest diversity among species on Earth are found in regions furthest from the equator." (Incorrect: polar regions have lower abundance and diversity).
• Option 4: "The greatest abundance of species and the greatest diversity among species on Earth are found near the equator." (Correct: both abundance and diversity peak in tropical regions near the equator).

Answer:

• (A) The greatest abundance of species on Earth is found near the equator, but the greatest diversity among species is found in regions furthest from the equator.
• (B) The greatest diversity among species on Earth is found near the equator, but the greatest abundance of species is found in regions furthest from the equator.
• (C) The greatest abundance of species and the greatest diversity among species on Earth are found in regions furthest from the equator.
• (D) The greatest abundance of species and the greatest diversity among species on Earth are found near the equator. (Correct answer)