Unionid Monitoring and Biodiversity Observation (UMBO): Monitoring data for freshwater mussels (Bivalvia: Unionidae) in seven southwestern Ontario, Canada watersheds (1999-2024)

Fisheries and Oceans Canada, in partnership with Environment and Climate
Change Canada and the Ausable Bayfield Conservation Authority, has
established the Unionid Monitoring and Biodiversity Observation (UMBO)
network to track species-specific mussel abundance and population
trajectories across seven watersheds in southern Ontario: Ausable River,
Bayfield River, Grand River, Maitland River, Saugeen River, Sydenham
River, and Thames River. The dataset includes results from 51 monitoring
sites: 8 sites in the Ausable River, 1 site in the Bayfield River, 7 sites
in the Grand River, 6 sites in the Maitland River, 4 sites in the Saugeen
River, 13 sites in the Sydenham River, and 12 sites in the Thames River.
Each river was sampled on a 5-10 year cycle, with Ausable River and
Sydenham River sites having been sampled 3 times, and sites in all other
rivers sampled twice.