The Role of Meiofauna in the Reef Aquarium Ecosystem
In a reef aquarium, meiofauna plays a crucial role in the ecosystem as an essential component of the nutrient cycle and the decomposition of organic matter.
The term “meiofauna” was coined by marine biologist Molly Mare in 1942 and refers to the collection of living organisms that inhabit the interstices and pores of marine substrates, such as sand, rocks, and organic debris (sediments called meiobenthos) present in a reef aquarium.
These organisms are small, generally less than 1 mm, and include worms, crustaceans, protozoa, and other microorganisms.
Meiofauna primarily consists of small, unsegmented roundworms called nematodes and small crustaceans: benthic copepods.
Photo: Harpacticoid Copepod under microscope with eggs
Meiofauna feeds on organic particles and bacteria present in the substrate, thus contributing to water purification and the regulation of nutrient levels.
Meiofauna serves as a food source for many aquarium inhabitants, such as corals, fish, and invertebrates. Some fish and invertebrates also forage in the substrate to feed on meiofauna organisms.
The presence of healthy and diverse meiofauna is therefore important for maintaining biological balance in a reef aquarium.
The Role of Meiofauna in the Reef Aquarium Ecosystem
Meiofauna plays a crucial role in the reef aquarium ecosystem due to its importance in ecological and biological processes.
Here are some reasons why meiofauna is important:
Decomposition of organic matter: Meiofauna feeds on organic particles and bacteria present in the substrate. By decomposing organic debris, it helps maintain water quality. It eliminates undesirable elements by reducing nutrient levels such as ammonia and nitrates.
Food sources: Meiofauna is an important food source for many reef aquarium residents, such as corals, fish (like the mandarin fish – Synchiropus), and invertebrates. Small meiofauna organisms serve as prey for larger species, thus contributing to the aquarium’s food chain.
Biological balance: Healthy and diverse meiofauna promotes the biological balance of a reef aquarium. Meiofauna organisms interact with other species in the aquarium, helping to maintain balanced biodiversity. This helps prevent the growth of undesirable species, such as harmful algae.
Water purification: By feeding on organic particles and bacteria, meiofauna participates in the natural filtration of aquarium water. It helps eliminate harmful substances and organic waste.
Nutrient recycling: Meiofauna organisms participate in nutrient recycling in reef aquarium ecosystems. By decomposing organic debris, they release essential nutrients into the water, which are then used by other organisms to grow and survive.
To promote the development of meiofauna, it is recommended to have an appropriate substrate, provide adequate nutrition such as adding live phytoplankton, and especially avoid the use of chemicals!
In summary, meiofauna plays a fundamental role in the reef aquarium ecosystem by contributing to the decomposition of organic matter, water purification, the food chain, biological balance, and nutrient recycling.
Maintaining healthy and diverse meiofauna is therefore essential for the overall health and well-being of the reef aquarium.
