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Interacting Effects of Discharge and Channel Morphology on Transport of Semibuoyant Fish Eggs in Large, Altered River Systems

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Publication Date
2014-05-06

Citation

Thomas A. Worthington(Author), Shannon K. Brewer(Author), Nicole A. Farless(Author), Timothy (Tim) B. Grabowski(Author), Mark S. Gregory(Author), 2014-05-06(Publication), Interacting Effects of Discharge and Channel Morphology on Transport of Semibuoyant Fish Eggs in Large, Altered River Systems, https://doi.org/10.1371/journal.pone.0096599

Summary

Habitat fragmentation and flow regulation are significant factors related to the decline and extinction of freshwater biota. Pelagic-broadcast spawning cyprinids require moving water and some length of unfragmented stream to complete their life cycle. However, it is unknown how discharge and habitat features interact at multiple spatial scales to alter the transport of semi-buoyant fish eggs. Our objective was to assess the relationship between downstream drift of semi-buoyant egg surrogates (gellan beads) and discharge and habitat complexity. We quantified transport time of a known quantity of beads using 2–3 sampling devices at each of seven locations on the North Canadian and Canadian rivers. Transport time was assessed based on [...]

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Purpose

Several studies have examined egg transport at catchment scales for Great Plains pelagic-broadcast spawning, however, little research has quantified the role of channel complexity at the reach scale on the downstream movement of semi-buoyant fish eggs. The aim of this study was to examine how discharge and habitat heterogeneity impact the movement rate of egg surrogates in two rivers within the historical distribution of Arkansas River shiner [16]. We hypothesized that downstream drift of egg surrogates would be controlled by the interaction of the flow regime and river geomorphology, with drift rate reduced in reaches with greater habitat complexity.

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info:doi/ info:doi/ https://doi.org/10.1371/journal.pone.0096599

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citationTypepublication
journalPLOS ONE
languageeng

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