Periphyton remain attached to stems and leaves of rooted plants.
Planktons have limited locomotory power.
Which of the statements given above is/are correct? Answer:
Only 2 & 3
Notes:
The aquatic organisms are classified on the basis of their zone of occurrence.
Neuston live at the air-water interface, e.g. floating plants.
Periphyton are organisms which remain attached to stems and leaves of rooted plants or substances emerging above the bottom mud such as sessile algae.
Plankton are microscopic floating organisms such as algae, diatoms, protozoans and larval forms are called plankton. This group includes both microscopic plants like algae (phytoplankton) and animals like crustaceans and protozoans (zooplankton). The locomotory power of the planktons is limited so that their distribution is controlled, largely, by currents in the aquatic ecosystems.
Nekton are the group of animals which are powerful swimmers that can overcome the water currents.
The benthic organisms are those found living at the bottom of the water mass.