What are autotrophs?

Energy contents of macrophytes may be estimated by

Mass of living matter at a trophic level in an area at any time is called

What proportion of total solar radiation is received as $PAR$ (Photosynthetically Active Radiation)?

The food chain which begins with dead organic matter is called

Given below is a figure of an ecosystem. Answer the following questions.
$(i)$ What type of ecosystem is shown in the figure?
$(ii)$ Name any plant that is characteristic of such an ecosystem.