Final answer:
Macroinvertebrates bring nutrients and minerals, diversity and ecological balance into an area.
Step-by-step explanation:
Macroinvertebrates bring nutrients and minerals into an area that might not already be there. These nutrients and minerals can be carried into aquatic systems through runoff from surrounding land, such as agricultural land where fertilization occurs. Nitrogen and phosphorus are particularly important nutrients that play key roles in determining the amount of primary production and biological activity in aquatic systems.Macroinvertebrates also contribute to diversity and ecological balance in an area. They help maintain nutrient cycles, break down organic matter into nutrient compounds, and recycle wastes from dead plants and animals. Biodiversity is important for these processes to occur and supports the functioning of ecosystems.
They do not bring pollution and contaminants into an area. Pollution and contaminants typically enter water supplies from point sources or nonpoint sources, and can have negative effects on aquatic ecosystems.
Macroinvertebrates also do not bring temperature fluctuations and disturbance into an area. Abiotic factors such as rainfall, temperature, and sunlight influence the composition of plant and animal communities in aquatic biomes, but macroinvertebrates do not directly cause temperature fluctuations or disturbance.