Ecosystem -Structure and Function

Define the ecosystem and describe its various components.

Describe the various components of pond ecosystem diagrammatically.

Assertion (A): The stability of coupled systems formed by climate and natural ecosystems is an important ecosystem service.

Reason (R):  Natural ecosystems prevent overheating of the earth by removing more of the greenhouse gases from the atmosphere.

During summer the density of the surface of the water decreases due to increase in its temperature. The upper most warm layer of a lake is called

Tilman's experiments with outdoor plots revealed:

Choose the correct statements:
A) Submerged macrophytes release oxygen and enrich dissolved oxygen in water.
B) A single mature tree can absorb 68 lbs CO₂ per year.
C) Production of fuel plants is an example of provision services.
D) The aesthetic value of a place is considered as regulatory service.

The term "Ecosystem" was coined by:

Stratification is well developed in

Read the given statements and select the correct option.
Statement 1 : Zone of transition between two types of communities is called as ecotone
Statement 2 : Estuary is an ecotone between marine and fresh water communities.

Complete the analogy.

Desert: Terrestrial ecosystem :: Freshwater lake: _____(Aquatic ecosystem/Forest ecosystem/ Grassland ecosystem)

The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called(Profundal zone/Littoral zone/ Benthic zone)

The principal grassland of South America is called(Pampas/ Savanna/Shrublands)

Submerged hydrophytes have stomata on upper surface.

The transition zone between the adjacent biomes is ecotype.

The base tier of the ecological pyramid represents the _____ (producers/primary consumers) in an ecosystem.

Edaphic factor refers to

The horizontal distribution of trees is studied in

Unit to measure the balance of an ecosystem is

What is the ultimate source of energy for the ecosystems? (Plants/Sun/Carbohydrates)