Epiphytic macroinvertebrate communities at intra-patch positions in Ranunculus nipponicus var. submersus in the Nishibetsu River, Japan

This dataset provides epiphytic macroinvertebrate community data collected from 10 patches of the submerged macrophyte Ranunculus nipponicus var. submersus in the spring-fed Nishibetsu River, Hokkaido, Japan. Sampling was conducted at upstream, lateral (right and left), and downstream parts of each patch to examine within-patch distribution of macroinvertebrates. The dataset includes taxonomic richness (number of taxa), total density (abundance / macrophyte dry weight), functional feeding group (FFG)–specific density, and habit trait–specific density. Environmental variables include macrophyte dry weight (g) and water depth to shoots (cm) measured at each sampling location.