Dataset 642
Regional Watershed Monitoring Program Benthic Macroinvertebrate Data, 2013-2021
Realm: Freshwater
Climate: Temperate
Biome: Small Lake Ecosystems Central latitude: 43.835160
Central longitude: -79.484210
Duration: 8 years, from 2013 to 2020
Climate: Temperate
Biome: Small Lake Ecosystems Central latitude: 43.835160
Central longitude: -79.484210
Duration: 8 years, from 2013 to 2020
31346 records
319 distinct species
Across the time series Caecidotea is the most frequently occurring speciesMethods
The data contained in the dataset were collected from 2013 - 2021 following The Ontario Benthos Biomonitoring Network (OBBN) standard sampling protocols. The dataset contains the necessary information for the calculations of biological metrics to assess stream health (not included; to be calculated at the discretion of dataset user). Sampling stations have been established according to the Ontario Stream Assessment Protocol (OSAP). Sampling sites represent at least one riffle-pool sequence, are at least 40 m long and begin and end at a crossover point. During the summer months, sampling at each station is carried out using the traveling-kick-and-sweep method along a number of transects. Each sample is collected using a 500 micron mesh D-net, with the samples from all transects combined into a single composite sample. Samples (BMI and debris) are preserved in the field using buffered formalin and processed in the laboratory. After 48 hours in formalin, the samples are transferred to ethanol for long-term preservation. Samples were identified to the lowest practical level (LPL) which was usually genus. Samples from 2001 to 2003 were identified by contract taxonomists and the entire sample was processed and identified. The 2004 to 2008 samples were identified by TRCA entomology technicians. Rather than identifying the whole sample, standardized random sub-sampling was carried out and a minimum of 100 macroinvertebrate individuals were counted.Citation(s)
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