Nearshore Benthic Invertebrates of the Ontario Waters of Lake Ontario |
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| Affiliation: | 1. Department of Economics, University of Lisbon, Rua Miguel Lupi, 20, 1249-078 Lisbon, Portugal;2. COPPEAD Graduate Business School, Federal University of Rio de Janeiro, Brazil;3. Department of Transport Management, Federal University of Technology, Minna, Niger State, Nigeria;4. Bangladesh Army International University of Science and Technology, Bangladesh;1. School of Food Science and Technology, Henan University of Technology, Lianhua Street, Zhengzhou High-Tech Development Zone, Zhengzhou, 450001, Henan, China;2. Department of Biosystems Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada;3. Modern Research and Development Centre, Agriculture and Agri-Food Canada, Winnipeg, Manitoba, R3T 2N2, Canada;1. Department of Microbiology, Faculty of Science, Federal University, Birnin Kebbi P.M.B. 1157 Kalgo Road, Birnin Kebbi, Kebbi State, Nigeria;2. Immunization, Vaccines and Emergencies, World Health Organization, Kebbi State Field Office, Nigeria;3. Department of Demography and Social Statistics, Faculty of Art, Social and Management Sciences, Federal University, Birnin Kebbi P.M.B. 1157 Kalgo Road, Birnin Kebbi, Kebbi State, Nigeria;1. DB Environmental, 365 Gus Hipp Blvd., Rockledge, FL, USA;2. Juston Hydro, Stockholm, Sweden;3. Water Resources Group, Nine Mile Falls, WA, USA;4. South Florida Water Management District, West Palm Beach, FL, USA;1. Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, University of Iowa, Iowa City, IA, USA;2. Department of Anesthesia, University of Iowa Hospital and Clinics, University of Iowa, Iowa City, IA, USA |
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| Abstract: | Benthic invertebrates were collected by divers along 25 transects (depths of 2, 5, 10, and 20 m) between the Niagara River and Kingston during July 1981. Total standing stocks, which ranged from 1,600 m−2 to 314,200 m−2, were greatest on silt and clay, especially near the mouth of the Humber River, and smallest on rock. Of the 196 taxa which were recognized, Vejdovskyella intermedia, immature Tubificidae, Chaetogaster diaphanus, Potamothrix vejdovskyi, Tanytarsus, Pontoporeia hoyi, and Gammarus fasciatus were the most abundant and most frequently collected. Both inspection of the distributions of common taxa and ordination based on abundances of all taxa found at >5 stations indicated that organic enrichment, depth, and susceptibility to upwelling were the primary factors influencing the composition of invertebrate communities. Exposure to wave action was less important, and type of substratum had little effect. Overall, the nearshore fauna of Lake Ontario was less diverse, but more abundant than that of Lake Huron. |
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