Question

Which of the following accurately describes how strata are formed in an ecosystem?

1. Strata are formed primarily by the decomposition of organic matter on the forest floor.
2. Plants or trees within an ecosystem organize into several height classes, forming distinct layers.
3. Plants belonging to the same height class are considered to be part of the same stratum.
4. The presence of animal populations at different altitudes determines ecosystem stratification.

• A. 1, 3
• B. 2, 3
• C. 2
• D. 1, 4

Answer 1

Answer:

B. 2, 3

• The formation of strata in an ecosystem is predominantly driven by the varying heights and growth forms of plant species.

• Different plant species are adapted to specific light, moisture, and nutrient conditions, leading them to occupy different vertical positions.

• This creates distinct microclimates within each layer, which in turn support different communities of animals and microorganisms.

• This structural complexity allows a greater number of species to coexist by partitioning resources and habitats vertically.