Table 2. Comparison of Research Grade observations between time periods within four boundaries of Cedar Lake, Linn County, Iowa.

Percentage of the total Research Grade observations presented in parentheses.

	Prior work (2008–2021)	Our study (2021–2022)
Within lake bounds	57 (33.9%)	181 (22.9%)
≤ 10 m of lake edge	100 (59.5%)	465 (59.1%)
≤ 50 m of lake edge	145 (86.3%)	748 (95.0%)
≤ 100 m of lake edge	154 (91.6%)	780 (99.1%)