A) grassland ecosystem
B) pond ecosystem
C) forest ecosystem
D) none of these
Correct Answer: B
Solution :
Phytoplanktons are floating and drifting flora like Nostoc, Chlamydomonas, diatoms and other green and blue-green algae which, remain aggregated on water in pond ecosystem. They are producers. The producers in grassland ecosystem are mainly grasses as species of Dichanthium, Cynodon, Desmodium, Digitaria, Setaria etc. In forest ecosystem the producers are mainly trees, that show much Species diversity and greater degree of stratification. Besides tree there are also present shrubs and ground vegetation.
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