Which is the reason for highest biomass in aquatic ecosystem?

Q. Which is the reason for the highest biomass in an aquatic ecosystem?

1. Nano plankton, blue-green algae, green algae
2. Sea grass and slime molds
3. Benthonic and brown algae
4. Diatoms

Answer: Benthonic and Brown Algae

Benthonic and brown algae are the reasons for the highest biomass in aquatic ecosystem

• Algae is a term for a diverse group of organisms living in the ocean. Benthic algae usually cover hard bottoms from the seashore down to 40 metres depth. Below that level, insufficient sunlight hampers their growth. Where the bottom is sandy or muddy the benthic algae cannot attach themselves as they have no roots.
• Benthic algae are a source of food, energy and cover for many organisms. In this way, the productivity of the benthic algae in shallow waters directly or indirectly affects the efficiency of the entire marine ecosystem.
• Benthic algae are generally split into three main groups: green algae, brown algae and red algae.
• The Brown Algae play the ecological roles of a decomposer, producer and a food source for aquatic life. They play an important role in marine environments, both as food and for the habitats they form.

Marine ecosystems cover approximately 71% of the earth's surface and contain approximately 97% of the planet's water. They generate 32% of the world's net primary production.