well there are many species of fish in the world. Plankton are microscopic organisms that float and drift on the surfaces of large bodies of water, especially the oceans. Primary producers — including bacteria, phytoplankton, and algae — form the lowest trophic level, the base of the aquatic food web.Primary producers synthesize their own energy without needing to eat. Fish, zooplankton, snails, sea urchins are a few marine primary consumers. The phytoplankton are the base of the food chain. Primary Consumer Definition. Even though primary consumers feed on producers, they … Within a coral reef ecosystem, the producers are the sea weeds, the sea grasses and the plankton species. Some of the primary consumers or herbivores living on the land are chipmunks, mice, horses, birds, deer and some insects. Primary consumers are usually herbivores, feeding on plants and fungus. The zooplankton community is an important element of the aquatic food chain. There are many other consumers such as whales, Sharks, seals, birds and much more. Zooplankton are tiny animals that feed off of either phytoplankton or other zooplankton. 10 Percent Energy Rule. Producers. Zooplankton are highly sensitive to changes in aquatic ecosystems. Zooplankton are primary consumers or the second step in the food chain. marsh grass :primary producer primary A marsh hawk :third level 3rd D plankton- eating fish :second level 2nd C The primary consumers are the coral polyps, some mollusk species, the zooplankton species, the starfish, the crabs, the sea urchins, the green sea turtle and some smaller fish living in the coral reef system. Primary consumers are usually herbivores that feed on autotrophic plants, which produce their own food through … A primary consumer is an organism that feeds on primary producers.Organisms of this type make up the second trophic level and are consumed or predated by secondary consumers, tertiary consumers or apex predators.. Trophic levels. Decomposer: the decomposer is a very primary decomposer in the world, bacteria (farthest right). These organisms serve as an intermediary species in the food chain, transferring energy from planktonic algae (primary producers) to the larger invertebrate predators and fish who in turn feed on them. The main difference between phytoplankton and zooplankton is that phytoplankton is a plant-like organism whereas zooplankton is an animal-like organism. If phytoplankton dies before it is eaten, it descends through the euphotic zone as part … Zooplankton get their food from eating phytoplankton. This particular food web starts with Phytoplankton, a photosynthetic primary producer that receives its energy from the sun and does not need to consume any organism. Zooplankton is just one of the many important consumers in the Acrtic Ocean. Both phytoplankton and zooplankton are similar in size and their ecological importance. Many photosynthesize, using the sun’s energy to build carbohydrates. The Phytoplankton is consumed by Zooplankton, a primary consumer. Phytoplankton serves as a primary producer in the aquatic food chains. As primary consumers, zooplankton are the crucial link between the primary producers (mainly phytoplankton) and the rest of the marine food web (secondary consumers). (Lab 20) For each of these species in the simulation list the type of organism it is (a. phytoplankton or zooplankton, b. primary producer, primary consumer, or secondary consumer) Trout fish Secondary consumer Primary or Secondary depends on the fish.