Importance of nonindigenous harpacticoids (Crustacea: Copepoda) decrease with depth in Lake Ontario |
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| Affiliation: | 1. Cornell University, Department of Natural Resources and the Environment, Cornell Biological Field Station, Bridgeport, NY 13030, USA;2. U.S. Geological Survey, Great Lakes Science Center, 17 Lake Street, Oswego, NY 13126, USA;3. U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, MI 48105, USA;4. Great Lakes Center, Buffalo State College, 1300 Elmwood Ave, Buffalo, NY 14222, USA;1. University of Lodz, Faculty of Biology and Environmental Protection, Department of Invertebrate Zoology and Hydrobiology, Banacha 12/16, 90-237 Lodz, Poland;2. University of Guelph, Centre for Biodiversity Genomics, 50 Stone Road West, ON N1G 2W1 Guelph, Canada;3. University of Gdańsk, Faculty of Biology, Department of Invertebrate Zoology and Parasitology, Laboratory of Systematic Zoology, Wita Stwosza 59, 80-308 Gdańsk, Poland;4. University of Milan, Department of Agricultural and Environmental Sciences – Production, Landscape, Agroenergy, Via Celoria 2, 20133 Milano, Italy;5. University of Szczecin, Institute of Marine and Environmental Science, Centre of Molecular Biology and Biotechnology, W?ska 13, 71-415 Szczecin, Poland;6. BAT Center - Interuniversity Center for Studies on Bioinspired Agro-environmental Technology, University of Napoli Federico II, Via Università 100, 80055 Portici, Italy;1. Natural Resources Department, Sault Ste. Marie Tribe of Chippewa Indians, 2428 Shunk Rd, Sault Ste. Marie, MI Resources 49783, USA;2. Michigan Department of Natural Resources, Charlevoix Fisheries Research Station, 96 Grant Street, Charlevoix, MI 49720, USA;3. Michigan State University, 480 Wilson Rd, East Lansing, MI 48824, USA;4. Little Traverse Bay Bands of Odawa Indians, 7500 Odawa Circle, Harbor Springs, MI 49740, USA;1. School for Environment and Sustainability, University of Michigan, 440 Church St, Ann Arbor, MI 48109, USA;2. Great Lakes Water Studies Institute, Northwestern Michigan College, 1701 Front St, Traverse City, MI 49686, USA;1. Department of Fisheries and Wildlife, Michigan State University, 480 Wilson Rd, East Lansing, MI 48824, USA;2. Department of Integrative Biology, Michigan State University, 252 Farm Ln., East Lansing, MI 48824, USA;3. Ecology, Evolution, and Behavior Program, 103 Giltner Hall, 293 Farm Lane, East Lansing, MI 48824, USA;4. Department of Biological Sciences, State University of New York-Oswego, Centennial Drive, Oswego, NY 13126, USA;5. Little River Band of Ottawa Indians Natural Resources Department 2608 Government Center Drive Manistee, MI 49660, USA;1. Department of Civil and Environmental Engineering, University of Windsor, Windsor, ON, Canada;2. Environment and Climate Change Canada, Water Science and Technology, Canada Centre for Inland Waters, Burlington, ON L7S 1A1, Canada;3. UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Hwy, M004, Crawley, WA 6009, Australia |
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| Abstract: | Harpacticoid copepods can be a substantial component of the meiobenthic community in lakes and serve an ecological role as detritivores. Here we present the first species-level lake-wide quantitative assessment of the harpacticoid assemblage of Lake Ontario with emphasis on the status of nonindigenous species. Additionally, we provide COI-5P sequences of harpacticoid taxa through Barcode of Life Data System (BOLD). Harpacticoids were collected at depths from 0.1 to 184 m and from a range of substrates from August to September 2018 as part of the Cooperative Science and Monitoring Initiative (CSMI) offshore benthic survey. Twenty-six meiobenthic samples were analyzed using microscopy for community composition analysis of harpacticoids. We found thirteen indigenous and three nonindigenous species of harpacticoid, with the introduced species dominating at shallow depths. The community transitioned from nonindigenous to indigenous species dominance as depth increased. Nonindigenous species accounted for 79% of the community (by abundance) at depths <20 m, 55% from 20 to 40 m, and only 24% at depths >40 m. The nonindigenous species encountered included the first detections of Schizopera borutzkyi (Monchenko, 1967) and Heteropsyllus nunni (Coull, 1975) from Lake Ontario. S. borutzkyi was the most abundant harpacticoid species in the lake, approaching a maximum density of 50,000/m2 and a lake-wide average density of 7,900/m2. Numerically important indigenous species included Bryocamptus nivalis (Willey, 1925), Canthocamptus robertcokeri (Wilson, 1958), Canthocamptus staphylinoides (Pearse, 1905), and Moraria cristata (Chappuis, 1929). The prevalence of nonindigenous harpacticoids in the meiobenthos of Lake Ontario suggests further investigations of Great Lakes meiofauna communities are warranted. |
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| Keywords: | Arthropoda Biological monitoring Great Lakes Meiofauna Nonindigenous species |
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