Macrofauna

Macrofauna refers to animal life visible to the naked eye, typically those organisms retained by a 0.5 mm mesh sieve. This includes a diverse range of invertebrates such as insects, crustaceans, mollusks, and worms, as well as larger vertebrates like amphibians, reptiles, and some fish. They play crucial roles in ecosystem function, including decomposition, nutrient cycling, and bioturbation. Their abundance and diversity can be indicators of environmental health, making them valuable in ecological studies. The study of macrofauna encompasses both terrestrial and aquatic environments.

Macrofauna meaning with examples

• Researchers examined the abundance of macrofauna in a forest soil, observing a decline in earthworm populations after herbicide application. This highlighted the impact of chemical runoff on soil health and its crucial role in the ecosystem.
• The analysis of stream macrofauna, including caddisflies and mayflies, was used to assess the water quality of the river. The presence of pollution-sensitive species indicated a healthy aquatic environment.
• Surveys of the intertidal zone revealed a rich diversity of macrofauna, including crabs, snails, and sea stars. These organisms directly contribute to the productivity and biodiversity of the coastal zone.
• The stomach contents of a predatory fish were examined to determine its diet, revealing its reliance on several types of aquatic macrofauna such as dragonfly nymphs and freshwater shrimp.
• Agricultural practices and pesticide use significantly impact the diversity of macrofauna in surrounding fields, thereby affecting soil health and potential long-term consequences on the ecosystem.