Potential sedimentation impacts related to dam removal: Icicle Creek, Washington, U.S.A.

Lorang, Mark S.; Aggett, G. R.

doi:10.1016/j.geomorph.2004.10.013

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…Indeed, differences between restored vs. unrestored management approaches may still play out at higher levels in the food web (e.g., fish; Dorobek, Sullivan & Kautza, 2015) or over longer time scales (i.e., decades; Hansen & Hayes, 2012), stressing the importance of long-term monitoring and high-resolution food-web data following dam removal and associated restoration efforts. Overall, such information from the removal of lowhead dams will be an important step in developing comprehensive river management following the removal of in-stream infrastructure (Lorang & Aggett, 2005). …”

Section: Discussionmentioning

confidence: 99%

Seasonally distinct taxonomic and functional shifts in macroinvertebrate communities following dam removal

Sullivan

Manning

2017

PeerJ

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Dam removal is an increasingly popular restoration tool, but our understanding of ecological responses to dam removal over time is still in the early stages. We quantified seasonal benthic macroinvertebrate density, taxonomic composition, and functional traits for three years after lowhead dam removal in three reaches of the Olentangy River (Ohio, USA): two upstream of former dam (one restored, one unrestored), and one downstream of former dam. Macroinvertebrate community density, generic richness, and Shannon–Wiener diversity decreased between ∼9 and ∼15 months after dam removal; all three variables consistently increased thereafter. These threshold responses were dependent on reach location: density and richness increased ∼15 months after removal in upstream reaches versus ∼19 months downstream of the former dam. Initial macroinvertebrate density declines were likely related to seasonality or life-history characteristics, but density increased up to 2.27× from year to year in three out of four seasons (late autumn, early spring, summer) across all reaches. Macroinvertebrate community composition was similar among the three reaches, but differed seasonally based on non-metric multidimensional scaling (NMDS) and analysis of similarity (ANOSIM). Seasonal differences among communities tended to decrease after dam removal. We detected community-wide shifts in functional traits such as multivoltinism, depositional habitat use, burrowing, and collector-gatherer feeding mode. We observed that these traits were expressed most strongly with Chironomidae, which was the most abundant family. Our results suggest that seasonal environmental conditions can play a role in the response and recovery of macroinvertebrate communities—often used to monitor ecosystem condition—following dam removal. In particular, macroinvertebrate density and diversity can show recovery after dam removal, especially in seasons when macroinvertebrate density is typically lowest, with concomitant changes to functional trait abundance. Thus, we recommend scientists and managers consider responses to dam removal throughout the year. Further, similar density, generic richness, and functional traits among reaches suggest that channel restoration after dam removal may initially have equivocal effects on invertebrate communities.

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Section: Discussionmentioning

confidence: 99%

Seasonally distinct taxonomic and functional shifts in macroinvertebrate communities following dam removal

Sullivan

Manning

2017

PeerJ

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“…At least 121 dams were removed across the United States during 1930-1999 and another 20 to 50 dams were decommissioned each year during the first decade of the 21st century . A common scenario following dam removal is incision of a channel into reservoir sediment, followed by channel widening, aggradation, and eventual stabilization in a manner that reflects the degree of base level lowering following dam removal, as well as particle size and cohesion of reservoir sediment (Stanley et al, 2002;Doyle et al, 2003;Lorang and Aggett, 2005;Cheng and Granata, 2007;Major et al, 2008;Wilcox et al, 2014). The distance over which sediment is dispersed downstream, and associated depositional patterns, depend on sediment supply versus river transport capacity and are likely to be highly variable across time and space as the channel gradually adjusts (Pizzuto, 2002).…”

Section: Increased Sediment Supply To or Within River Corridorsmentioning

confidence: 99%

Legacy effects on sediments in river corridors

Wohl

2015

Earth-Science Reviews

162

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“…As part of the Neponset River Fish Passage and Habitat Restoration Project, the Commonwealth of Massachusetts is considering the removal of this Dam to restore anadromous fish passage and spawning (U.S. Army Corps of Engineers, N.E.D., 2002). Previous studies have shown that dam removal significantly affects the geomorphological features and sedimentological processes of river-estuarine systems (Lorang and Aggett, 2005;Pizzuto, 2002) and may cause local ecological changes (Shuman, 1995).…”

Section: Introductionmentioning

confidence: 99%

Beryllium-7 atmospheric deposition and sediment inventories in the Neponset River estuary, Massachusetts, USA

Jian

Olsen

2009

Journal of Environmental Radioactivity

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Potential sedimentation impacts related to dam removal: Icicle Creek, Washington, U.S.A.

Cited by 20 publications

References 15 publications

Seasonally distinct taxonomic and functional shifts in macroinvertebrate communities following dam removal

Seasonally distinct taxonomic and functional shifts in macroinvertebrate communities following dam removal

Legacy effects on sediments in river corridors

Beryllium-7 atmospheric deposition and sediment inventories in the Neponset River estuary, Massachusetts, USA

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