The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called
pelagic zone
benthic zone
lentic zone
littoral zone
Edaphic factor refers to
water
soil
relative humidity
altitude
Which of the following is an ecosystem service provided by a natural ecosystem?
Cycling of nutrients
Prevention of soil erosion
Pollutant absorption and reduction of the threat of global warming
All of the above
Name an organism found as secondary carnivore in an aquatic ecosystem.
In an aquatic ecosystem, food chain can be drawn as follows
Producer (Phytoplankton) $\rightarrow$ Primary consumer (Zooplankton) $\rightarrow$ Secondary consumer (small fish and water beetle) (Ist to carnivore) $\rightarrow$ Tertiary consumer (Ilnd carnivore like large fish, water birds like fowl and duck).
So, the large fish and water birds like ducks and water fowls which are the tertiary consumers in an aquatic ecosystem occupy a position of secondary carnivore.
What does the base tier of the ecological pyramid represent?
The base tier of the ecological pyramids represent the producers or first trophic level in case of three ecological pyramids
(i) Pyramid of number
(ii) Pyramid of biomass
(iii) Pyramid of energy
