2021
DOI: 10.1111/fwb.13685
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Could spatial heterogeneity in flow disturbance drive temporal stability of native–invasive species co‐occurrence in riverscapes?

Abstract: Spatial heterogeneity of abiotic influences like disturbance in riverscapes could play an important role in dispersal‐aided community stability. We tested if higher spatial variability in conditions around river confluences caused by different flood disturbance regimes in branches could possibly influence the stability of a fish assemblage dominated by strong negative interactions between non‐native trout and native galaxiid fishes. We used field surveys to evaluate the effects of disturbance‐driven difference… Show more

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Cited by 6 publications
(2 citation statements)
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“…This phenomenon appears to be in accordance with the environmental matching hypothesis, stating that the impacts of an invader decrease with environmental conditions that diverge from its physiological optimum (Ricciardi et al 2013, Iacarella andRicciardi 2015). Our study joins a growing body of literature exploring environmental factors that promote invasion refugia within invaded freshwater ecosystems (Grabowski et al 2009, Kestrup and Ricciardi 2009, Priddis et al 2009, Iacarella and Ricciardi 2015, Latzka et al 2016, Astorg et al 2020, Boddy et al 2020, Boddy and McIntosh 2021. More specifically, we aimed to address environmental determinants of invasion hotspots and refugia of an invasive benthic fish, the round goby (Neogobius melanostomus), in a large and complex river system, the St Lawrence River, which drains the North American Great Lakes.…”
Section: Introductionsupporting
confidence: 88%
“…This phenomenon appears to be in accordance with the environmental matching hypothesis, stating that the impacts of an invader decrease with environmental conditions that diverge from its physiological optimum (Ricciardi et al 2013, Iacarella andRicciardi 2015). Our study joins a growing body of literature exploring environmental factors that promote invasion refugia within invaded freshwater ecosystems (Grabowski et al 2009, Kestrup and Ricciardi 2009, Priddis et al 2009, Iacarella and Ricciardi 2015, Latzka et al 2016, Astorg et al 2020, Boddy et al 2020, Boddy and McIntosh 2021. More specifically, we aimed to address environmental determinants of invasion hotspots and refugia of an invasive benthic fish, the round goby (Neogobius melanostomus), in a large and complex river system, the St Lawrence River, which drains the North American Great Lakes.…”
Section: Introductionsupporting
confidence: 88%
“…Flooding is generally considered to be beneficial to native fishes in rivers where hydrologic alterations facilitate invasive species establishment (Mims and Olden 2012;Rogosch et al 2019;Boddy and McIntosh 2021). Flow experiments using Glen Canyon Dam discharge were designed, in part, to benefit rearing of larval and juvenile native fishes by building backwater habitats, however the impact of backwaters on native fish recruitment near the Little Colorado River is relatively small (Dodrill et al 2015) and has not been well studied elsewhere.…”
Section: Management Implicationsmentioning
confidence: 99%