Restoration of a Nova Scotia stream to enhance Atlantic salmon  provides few benefits to benthic invertebrates

Têtu, C.; Mitchell, S.C.; MacInnis, Charles; Taylor, Barry R.

doi:10.15273/pnsis.v48i2.6656

Cited by 3 publications

(2 citation statements)

References 57 publications

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“…Extence et al, ; Friberg, Kranvang, Svendson, & Hansen, ), partial successes ( e.g. Kail et al, ; Tetu, Mitchell, Macinnis, & Taylor, ), and failures ( e.g. examples cited by Hammond, Mant, Holloway, Elbourne, & Janes, ) is essential to inform and influence the future design and planning of river restoration projects.…”

Section: Discussionmentioning

confidence: 99%

Application of the Proportion of Sediment‐sensitive Invertebrates (PSI) biomonitoring index

Extence

Chadd

England

et al. 2017

River Research & Apps

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Sedimentation of river beds is a key pressure impacting riverine ecological communities. Research has identified the need for new approaches to help demonstrate and quantify the impacts of excessive fine-sediment deposition on benthic macroinvertebrate populations. To help meet this requirement, the Proportion of Sediment-sensitive Invertebrates (PSI) methodology was developed and has been in operational use in the United Kingdom for several years. This paper presents a number of case studies, at both national and local scales, showing how the method can be used to identify point and nonpoint fine-sediment pollution, as well as demonstrating the analysis of a national dataset to describe the relationship between PSI and a channel substrate index.A novel approach to displaying PSI data alongside local ecological and hydrological information is also presented and interpreted, to illustrate how improved understanding of biotic and abiotic relationships and interactions can be readily accomplished. Excessive fine-sediment accumulation on river beds results in impaired ecosystem health globally. The case studies and examples presented here will provide confidence that the PSI method can form the basis for evidence gathering and analysis, both within and beyond the United Kingdom. The paper concludes with an overview of the use of PSI in catchment research and management, a consideration of the relationship of the metric with other macroinvertebrate indices, and a summary of refinements recently applied to the index.

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Section: Discussionmentioning

confidence: 99%

Application of the Proportion of Sediment‐sensitive Invertebrates (PSI) biomonitoring index

Extence

Chadd

England

et al. 2017

River Research & Apps

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“…Overall, the results of restoration efforts have been monitored poorly and the documented results have been variable. While most of the studies have found positive responses of zoobenthos communities to restoration (Albertson et al, 2011; Kil & Bae, 2012; Louhi et al, 2016; Muotka et al, 2002; Pilotto et al, 2018; Suurkuukka et al, 2014; Verdonschot et al, 2016), some have reported little or no changes in the community composition (Smith et al, 2020; Tetu et al, 2016). It is also commonly reported that zoobenthos communities are heavily obscured by river restoration procedures and show lower biomass and diversity acutely after restorations (dos Reis Oliveira et al, 2019; Louhi et al, 2011; Molina‐Moctezuma et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Water quality shapes the community structure of zoobenthos in rivers but only has a minor effect on the fatty acid composition of zoobenthos and salmonids

Kesti,

Strandberg,

Taipale

et al. 2024

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Many river ecosystems in the boreal zone have faced remarkable changes due to intensive human activities, including land‐use changes in the catchments and channelization. Recently, restoration efforts have increased, hoping to restore a more natural hydromorphology. We studied the community structure of benthic macroinvertebrates (zoobenthos) in seven rivers in Eastern Finland, using samples that covered pre‐ and post‐restoration periods, to examine how environmental metrics relate to the zoobenthos community structure, and the fatty acid (FA) composition and content of Ephemeroptera, Plecoptera, and Trichoptera nymphs and larvae. We also analyzed the FA composition and content of land‐locked salmon (Salmo salar m. sebago) in three of the rivers and brown trout (Salmo trutta) in two of the rivers. Zoobenthos communities differed significantly among most of the rivers: 24% of the differences between the zoobenthos communities were driven by water quality parameters related to the loading of terrestrial organic matter (water color, pH, and iron concentration). Temporal changes in zoobenthos communities could not be fully attributed to restorations. The FA composition of zoobenthos was mostly explained by phylogenetic origin (47%). However, especially mayfly Heptagenia sulphurea (Ephemeroptera: Heptageniidae) had variable FA composition and content among the rivers suggesting an environmental quality indicator role for this species. FA composition and content of salmonids were mostly size‐dependent (24%), but river identity also influenced their FA composition (22%). Our results indicate that water quality affects the availability of essential FAs for consumers by altering the zoobenthos community structure and their FA composition and content.

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Remote sensing of river habitat for salmon restoration

Giroux¹,

Grant²,

Brown³

et al. 2022

Front. Remote Sens.

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Losses of river complexity and viable habitat has led to negative effects on Atlantic salmon. With the rapid population decline of Atlantic salmon, there has been an increase in river restoration and salmon reintroduction projects, and an understanding of substrate is a vital component in the restoration of these habitats. However, the isolation and/or inaccessibility of many of these rivers make the collection of this information challenging and expensive based on conventional survey approaches. This study looks at the feasibility and accuracy of conducting substrate analysis using low-cost uncrewed aerial vehicles (UAV) at seven transects through macroscale river habitat (riffles, runs and pools) on the Upper Salmon River located in Fundy National Park near Alma, New Brunswick, Canada. Using ArcGIS, a supervised classification was conducted separating the dry and submerged substrate for higher accuracy. An object-based image analysis was conducted in PCI for delineation of substrate size. Small ideal spawning substrate was found to be concentrated in slower flowing pools while large substrate was concentrated in faster flowing riffles. The substrate analysis was conducted with an accuracy of 79% for dry substrate and 86% for submerged substrate, demonstrating the potential of UAV use in salmon habitat analysis.

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Restoration of a Nova Scotia stream to enhance Atlantic salmon provides few benefits to benthic invertebrates

Cited by 3 publications

References 57 publications

Application of the Proportion of Sediment‐sensitive Invertebrates (PSI) biomonitoring index

Application of the Proportion of Sediment‐sensitive Invertebrates (PSI) biomonitoring index

Water quality shapes the community structure of zoobenthos in rivers but only has a minor effect on the fatty acid composition of zoobenthos and salmonids

Remote sensing of river habitat for salmon restoration

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