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Seasonal mass migration of water boatmen (Hemiptera: Corixidae) as a wetland-river linkage and dietary subsidy to riverine fish

Description: We investigated the magnitude and implications of a little understood ecosystem linkage in the form of migrating aquatic insects, corixids (Hemiptera: Corixidae), that fly from geographically isolated wetlands into large rivers in the Prairie Pothole Region (PPR) of North America every fall, to overwinter. These migrations can lead to greatly increased riverine corixid densities and a shift in the species assemblage to one dominated by wetland-breeding species. Once in the rivers, these migratory insects act as an important dietary subsidy to several species of riverine fish. The following dataset contains files from our study with information on (1) study sites, (2) corixid abundances and (3) species composition in wetland and river habitats, (4) fish stomach content data, (5) data from passive samplers used to estimate migratory corixid inputs into rivers, and (6) a simulation used to estimate the magnitude of the corixid flux between wetlands and rivers over a larger scale. This study has demonstrated an extensive cross-boundary flux that occurs between spatially separated wetland and river ecosystems, highlighting a need for conservation to ensure that this connection is maintained.
Notes: Item exited embargo and became publicly available on 2022-01-12
Authors: Srayko, Stephen H.; University of Saskatchewan; Troutreach Saskatchewan; ORCID iD 0000-0003-0367-6789
Jardine, Timothy D.; University of Saskatchewan
Phillips, Iain D.; University of Saskatchewan; Troutreach Saskatchewan
Chivers, Douglas P.; University of Saskatchewan
Keywords: Corixidae
fish diet
Field of Research: 
Biological sciences
>
Ecology (except applications)
>
Estuarine and freshwater ecology
Publication Date: 2022-01-12T17:18:28Z
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
URI: https://doi.org/10.20383/102.0541
Related Identifiers: 
Geographic Coverage: 
Place Name
North Saskatchewan River
City
Saskatoon
Province /
Province / Territory
Saskatchewan
Territory
 
Country
Canada

Place Name
South Saskatchewan River
City
Saskatoon
Province /
Province / Territory
Saskatchewan
Territory
 
Country
Canada

Files in Dataset 
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Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Citation
Srayko, S., Jardine, T., Phillips, I., Chivers, D. (2022). Seasonal mass migration of water boatmen (Hemiptera: Corixidae) as a wetland-river linkage and dietary subsidy to riverine fish. Federated Research Data Repository. https://doi.org/10.20383/102.0541