NRCM Nutrient Cycling Practice Exam 2026 - Free Nutrient Cycling Practice Questions and Study Guide

Mesofauna in invertebrate detritivores are categorized based on their size, specifically ranging from 100 micrometers (µm) to 2 millimeters (mm). This classification is crucial in ecological studies, as mesofauna play significant roles in the decomposition process and nutrient cycling within soil ecosystems. They help break down organic matter, facilitating the return of nutrients to the soil, and serve as food sources for larger organisms.

The defined size range allows researchers to differentiate mesofauna from other groups of invertebrates, such as microfauna, which are smaller than 100 µm, and macrofauna, which exceed 2 mm. This size classification aids in understanding the ecological roles and contributions of different invertebrate groups to soil health and nutrient dynamics.