Meiofauna

Meiofauna refers to a group of small, benthic (bottom-dwelling) invertebrates found in both marine and freshwater environments. They are generally defined by their size, typically ranging from 0.042 to 0.5 mm, and often live in the interstitial spaces between sediment grains or on various surfaces. This diverse assemblage includes nematodes, copepods, turbellarians, gastrotrichs, and numerous other groups. Meiofauna plays a crucial role in aquatic ecosystems by consuming bacteria, algae, and detritus, contributing to nutrient cycling, and serving as a food source for larger organisms. Their abundance and diversity reflect the health of their habitats. They have a critical role in the aquatic food web, and nutrient dynamics, and are valuable indicator species. Their ecological studies can also support environmental assessments.

Meiofauna meaning with examples

• Sampling Meiofauna from sandy beaches revealed a surprisingly high diversity of nematodes and copepods, highlighting the importance of interstitial habitats. These tiny creatures were diligently observed feeding on organic matter, providing a key link in the coastal food web.
• A research team studied the response of Meiofauna to pollution in a harbor environment. A decrease in the Meiofauna population, specifically certain sensitive species, indicated the negative impact of pollutants on the ecosystem. Regular monitoring is paramount.
• Experiments demonstrated the role of Meiofauna in sediment bioturbation, the mixing and aeration of the substrate, further contributing to nutrient cycling. This research highlights the indirect benefits of biodiversity and ecological systems.
• The analysis of Meiofauna communities in a mangrove ecosystem showed a unique assemblage adapted to the specific environmental conditions, including the presence of hydrogen sulfide. They exhibit highly specific and complex environmental adaptations.