Which term is used to describe a sampling frame of known area for non-moving organisms?

Which term is used to describe a sampling frame of known area for non-moving organisms?

• A. Quadrat
• B. Rainwater harvesting
• C. Reservoir
• D. Quota

Answer: (A)

A quadrat is a square frame with a known area used to sample organisms in a defined patch of habitat. By placing it in different spots and counting the individuals inside, you can calculate density (how many per unit area) and compare populations across areas. It’s especially suited to non-moving or slow-moving organisms like plants or sessile invertebrates, because counting within a fixed area gives consistent, repeatable results when sampling multiple locations. The other options don’t fit this concept: rainwater harvesting and reservoirs are about collecting and storing water, while quota refers to a non-spatial sampling method that doesn’t involve a known-area frame for counting.

A quadrat is a square frame with a known area used to sample organisms in a defined patch of habitat. By placing it in different spots and counting the individuals inside, you can calculate density (how many per unit area) and compare populations across areas. It’s especially suited to non-moving or slow-moving organisms like plants or sessile invertebrates, because counting within a fixed area gives consistent, repeatable results when sampling multiple locations. The other options don’t fit this concept: rainwater harvesting and reservoirs are about collecting and storing water, while quota refers to a non-spatial sampling method that doesn’t involve a known-area frame for counting.