Vegetation recruitment in an enhanced floodplain: Ancillary benefits of salmonid habitat enhancement

Sellheim, Kirsten; Vaghti, Mehrey G.; Merz, Joseph E.

doi:10.1016/j.limno.2016.03.001

Cited by 6 publications

(4 citation statements)

References 77 publications

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“…The MRR site has an upstream drainage area of 2,782 km 2 and is located at 37.516°N, 120.397°W. The project design involved restructuring the channel and floodplain, augmenting the gravel supply (Downs et al, 2011), and reconnecting the channel and floodplain under the current flow regime (Sellheim et al, 2016). The reconfigured channel had a length of 1.4 km and was designed to convey a bankfull discharge of 48 m 3 /s, with a 10.1029/2018WR024428 Water Resources Research planform consisting of three straight reaches connected by two unaltered, sharp bends with a meander wavelength of~700 m (Figure 1c).…”

Section: Study Reachesmentioning

confidence: 99%

Physical Controls on Salmon Redd Site Selection in Restored Reaches of a Regulated, Gravel‐Bed River

Harrison

Bray

Overstreet

et al. 2019

Water Resources Research

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Large‐scale river restoration programs have emerged recently as a tool for improving spawning habitat for native salmonids in highly altered river ecosystems. Few studies have quantified the extent to which restored habitat is utilized by salmonids, which habitat features influence redd site selection, or the persistence of restored habitat over time. We investigated fall‐run Chinook salmon spawning site utilization and measured and modeled corresponding habitat characteristics in two restored reaches: a reach of channel and floodplain enhancement completed in 2013 and a reconfigured channel and floodplain constructed in 2002. Redd surveys demonstrated that both restoration projects supported a high density of salmon redds, 3 and 14 years following restoration. Salmon redds were constructed in coarse gravel substrates located in areas of high sediment mobility, as determined by measurements of gravel friction angles and a grain entrainment model. Salmon redds were located near transitions between pool‐riffle bedforms in regions of high predicted hyporheic flows. Habitat quality (quantified as a function of stream hydraulics) and hyporheic flow were both strong predictors of redd occurrence, though the relative roles of these variables differed between sites. Our findings indicate that physical controls on redd site selection in restored channels were similar to those reported for natural channels elsewhere. Our results further highlight that in addition to traditional habitat criteria (e.g., water depth, velocity, and substrate size), quantifying sediment texture and mobility, as well as intragravel flow, provides a more complete understanding of the ecological benefits provided by river restoration projects.

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Section: Study Reachesmentioning

confidence: 99%

Physical Controls on Salmon Redd Site Selection in Restored Reaches of a Regulated, Gravel‐Bed River

Harrison

Bray

Overstreet

et al. 2019

Water Resources Research

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“…Nevertheless, recent work in a reach of the Merced River relatively similar to the LYR 667 suggests that restored hydrological connectivity and substrate can greatly enhance 668 riparian vegetation development (Sellheim et al, 2016). …”

Section: Floodplain Ecosystem Implications 637mentioning

confidence: 99%

Floodplain inundation response to climate, valley form, and flow regulation on a gravel-bed river in a Mediterranean-climate region

Cienciala

Pasternack

2017

Geomorphology

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“…Unfortunately, riparian habitats are among the most threatened habitats in the world (Naiman et al, 1993; Sellheim et al, 2016) that have been degraded by agricultural land use. Clearing of land for agriculture increases the available land area for farming and results in the narrowing and loss of riparian habitats.…”

Section: Introductionmentioning

confidence: 99%

The effect of planting grass filter strips on fishes in agricultural headwater streams

Smiley

2024

Aquatic Conservation

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Grass filter strips (i.e., herbaceous riparian buffers) are a widely used conservation practice in the United States to mitigate the impacts of agriculture on streams and rivers. Yet, only a limited amount of information is available on the effects of grass filter strips on stream fishes and instream habitat conditions and long‐term assessments are rare. The objective of this research was to document the long‐term effects of planting grass filter strips adjacent to channelized agricultural headwater streams on fish community structure and instream habitat. Fishes, instream habitat and riparian characteristics were sampled from three channelized agricultural headwater streams without grass filter strips, three channelized agricultural headwater streams with grass filter strips and two unchannelized streams having forested riparian habitats in central Ohio from spring of 2006 to autumn of 2015. Fish species richness, abundance, darter species richness, per cent darters, sunfish species richness, minnow species richness and per cent headwater fishes did not differ among riparian habitat types. Darter species richness and per cent darters differed annually. Mean water depth, velocity, wetted width, instream habitat diversity, dominant grain size and per cent instream wood did not differ among riparian habitat types. Mean water depth, water velocity, wetted width and instream habitat diversity exhibited annual differences. Additionally, mean riparian width, woody vegetation density and per cent canopy cover were greater in forested streams than the unplanted and grass filter strip streams. Riparian characteristics did not differ annually. The lack of fish community responses 10–13 years after planting grass filter strips is probably due to the lack of corresponding changes in hydrological characteristics, substrate and instream wood amounts. These results suggest that grass filter strips should not be implemented alone but in conjunction with conservation practices that will improve physical habitat quality and water quality.

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Vegetation recruitment in an enhanced floodplain: Ancillary benefits of salmonid habitat enhancement

Cited by 6 publications

References 77 publications

Physical Controls on Salmon Redd Site Selection in Restored Reaches of a Regulated, Gravel‐Bed River

Physical Controls on Salmon Redd Site Selection in Restored Reaches of a Regulated, Gravel‐Bed River

Floodplain inundation response to climate, valley form, and flow regulation on a gravel-bed river in a Mediterranean-climate region

The effect of planting grass filter strips on fishes in agricultural headwater streams

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