Final answer:
Arrows that represent matter moving from a producer to an omnivore in an estuarine ecosystem are A (phytoplankton to clam, if the clam is considered omnivorous), C (phytoplankton to rockskipper), and E (macroalgae to damselfish).
Step-by-step explanation:
The question asks which arrows show matter moving from a producer to an omnivore in an estuarine ecosystem. In the context of a food web, producers are organisms that create their own food through the process of photosynthesis, such as phytoplankton or macroalgae. An omnivore is an organism that eats both plants and animals. Keeping this in mind, we need to identify arrows pointing from producers to omnivores.
- A. The arrow between the phytoplankton and the clam is correct if we assume the clam to be an omnivore (some clams are filter feeders and may consume phytoplankton).
- C. The arrow between the phytoplankton and the rockskipper is also correct, as rockskippers (if considered fish in this case) can be omnivores, consuming both plants like phytoplankton and small invertebrates.
- E. The arrow between the macroalgae and the damselfish is correct, as damselfish are known to be omnivorous, feeding on algae as well as small invertebrates and zooplankton.
Arrows B and D do not represent matter moving from a producer to an omnivore but rather from one consumer to another. B shows a secondary consumer (rockskipper) to another consumer (peacock flounder), and D shows matter moving from a producer (macroalgae) to a primary consumer (triggerfish), which is typically herbivorous. Therefore, the correct answers are A, C, and E.