Question

In which of the following ecosystems, detritus food chain (DFC) is the major conduit for energy flow?

• A. Pond Ecosystem
• B. River Ecosystem
• C. Forest Ecosystem
• D. Marine Ecosystem

Answer 1

The Correct Option is C

The detritus food chain (DFC) describes energy transfer initiated by decomposers and detritivores breaking down organic matter, differing from grazing food chains where energy moves from producers to consumers. The forest ecosystem is where the DFC is the primary pathway for energy. Forests store significant energy in dead organic material, including leaves, branches, and trees, which are processed by fungi, bacteria, and other detritivores.

Conversely:

• Pond Ecosystem: Predominantly utilizes a grazing food chain, with phytoplankton and zooplankton as the initial energy sources.
• River Ecosystem: Functions mainly through grazing food chains, with energy originating from algae and aquatic plants.
• Marine Ecosystem: While detritus is a factor, energy primarily flows through grazing food chains based on phytoplankton.

Consequently, concerning energy flow via detritus, the Forest Ecosystem is the appropriate choice due to its significant reliance on detritus-based energy pathways.