Crims Island-Restoration and monitoring of juvenile salmon rearing habitat in the Columbia River Estuary, Oregon, 2004-10

Haskell, Craig A.; Tiffan, Kenneth F.

doi:10.3133/sir20115022

Cited by 7 publications

(31 citation statements)

References 4 publications

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“…Data were originally reported by multiple studies (Johnson et al. , , , Eaton , Haskell and Tiffan , Columbia River Estuary Study Taskforce (CREST) , Roegner et al. , Thom et al.…”

Section: Results Of Seven Lines Of Evidencementioning

confidence: 99%

“…(); 15, Tanner et al. (); 16, Haskell and Tiffan (); 17, Johnson et al. (, ); 18, Columbia River Estuary Study Taskforce (CREST) (); 19, Johnson et al.…”

Section: Results Of Seven Lines Of Evidencementioning

confidence: 99%

“…However, intensive studies of three restoration sites in the LCRE indicated positive responses by salmon (Roegner et al. , Haskell and Tiffan ; U.S. Fish and Wildlife Service, unpublished data ).…”

Section: Causal Criteria Synthesis and Cumulative Effects Evaluationmentioning

confidence: 99%

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Evidence‐based evaluation of the cumulative effects of ecosystem restoration

et al. 2016

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Abstract. This study adapts and applies the evidence-based approach for causal inference, a medical standard, to the restoration and sustainable management of large-scale aquatic ecosystems. Despite long-term investments in restoring aquatic ecosystems, it has proven difficult to adequately synthesize and evaluate program outcomes, and no standard method has been adopted. Complex linkages between restorative actions and ecosystem responses at a landscape scale make evaluations problematic and most programs focus on monitoring and analysis. Herein, we demonstrate a new transdisciplinary approach integrating techniques from evidence-based medicine, critical thinking, and cumulative effects assessment. Tiered hypotheses about the effects of landscape-scale restorative actions are identified using an ecosystem conceptual model. The systematic literature review, a health sciences standard since the 1960s, becomes just one of seven lines of evidence assessed collectively, using critical thinking strategies, causal criteria, and cumulative effects categories. As a demonstration, we analyzed data from 166 locations on the Columbia River and estuary representing 12 indicators of habitat and fish response to floodplain restoration actions intended to benefit culturally and economically important, threatened and endangered salmon. Synthesis of the lines of evidence demonstrated that hydrologic reconnection promoted macrodetritis export, prey availability, and juvenile fish access and feeding. Upon evaluation, the evidence was sufficient to infer cross-boundary, indirect, compounding, and delayed cumulative effects, and suggestive of nonlinear, landscape-scale, and spatial density effects. Therefore, on the basis of causal inferences regarding foodweb functions, we concluded that the restoration program is having a cumulative beneficial effect on juvenile salmon. The lines of evidence developed are transferable to other ecosystems: modeling of cumulative net ecosystem improvement, physical modeling of ecosystem controlling factors, meta-analysis of restoration action effectiveness, analysis of data on target species, research on critical ecological uncertainties, evidence-based review of the literature, and change analysis on the landscape setting. As with medicine, the science of ecological restoration needs scientific approaches to management decisions, particularly because the consequences affect species extinctions and the availability of ecosystem services. This evidencebased approach will enable restoration in complex coastal, riverine, and tidal-fluvial ecosystems like the lower Columbia River to be evaluated when data have accumulated without sufficient synthesis.

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“…Data were originally reported by multiple studies (Johnson et al. , , , Eaton , Haskell and Tiffan , Columbia River Estuary Study Taskforce (CREST) , Roegner et al. , Thom et al.…”

Section: Results Of Seven Lines Of Evidencementioning

confidence: 99%

“…(); 15, Tanner et al. (); 16, Haskell and Tiffan (); 17, Johnson et al. (, ); 18, Columbia River Estuary Study Taskforce (CREST) (); 19, Johnson et al.…”

Section: Results Of Seven Lines Of Evidencementioning

confidence: 99%

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Evidence‐based evaluation of the cumulative effects of ecosystem restoration

et al. 2016

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“…Wetland types are estuarine intertidal or riverine tidal wetlands and were broadly classified according to Cowardin et al (1979). Additionally, three recently reconnected sites are included in analyses where appropriate; these sites are undergoing rapid changes in physical and biological features, caused by restoration actions (Haskell et al 2011, Johnson et al 2012. Kandoll Farm is a tributary site with new culvert installation and dike breaching, located on the Grays River in Washington.…”

Section: Wetland Typesmentioning

confidence: 99%

“…This category includes sites that were recently restored using hydrologic reconnection techniques, e.g., dike breach, tide gate, and channel excavation. The Cumulative Effects project sites Kandoll Farm, Vera Slough, and Crims Island are examples, but also illustrate the apparent problems with defining these sites as a single category given their widely different land use history and different levels of current hydrologic connectivity (Haskell and Tiffan 2011;Borde et al 2012a;Johnson et al 2012).…”

Section: Site Disturbance (Associated With Dredged Materials Placementmentioning

confidence: 99%

A Synthesis of Environmental and Plant Community Data for Tidal Wetland Restoration Planning in the Lower Columbia River and Estuary

Diefenderfer¹,

Borde²,

Cullinan³

2013

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The Effects of Juvenile American Shad Planktivory on Zooplankton Production in Columbia River Food Webs

2013

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Columbia River reservoirs support a large population of nonnative American Shad Alosa sapidissima that consume the zooplankton that native fishes also rely on. We hypothesized that the unprecedented biomass of juvenile American Shad in John Day Reservoir is capable of altering the zooplankton community if these fish consume a large portion of the zooplankton production. We derived taxon‐specific estimates of zooplankton production using field data and a production model from the literature. Empirical daily ration was estimated for American Shad and expanded to population‐level consumption using abundance and biomass data from hydroacoustic surveys. Daphnia spp. production was high in early summer but declined to near zero by September as shad abundance increased. American Shad sequentially consumed Daphnia spp., copepods, and Bosmina spp., which tracked the production trends of these taxa. American Shad evacuation rates ranged from 0.09 to 0.24/h, and daily rations ranged from 0.008 to 0.045 g·g−1·d−1 (dry weight) over all years. We observed peak American Shad biomass (45.2 kg/ha) in 1994, and daily consumption (1.6 kg/ha) approached 30% (5.3 kg/ha) of zooplankton production. On average, American Shad consumed 23.6% of the available zooplankton production (range, <1–83%). The changes in the zooplankton community are consistent with a top‐down effect of planktivory by American Shad associated with their unprecedented biomass and consumption, but the effects are likely constrained by temperature, nutrient flux, and the seasonal production patterns of zooplankton in John Day Reservoir. American Shad add to the planktivory exerted by other species like Neomysis mercedis to reduce the capacity of the reservoir to support other planktivorous fishes. The introduction of American Shad and other nonnative species will continue to alter the food web in John Day Reservoir, potentially affecting native fishes, including Pacific salmon Oncorhynchus spp.

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Crims Island-Restoration and monitoring of juvenile salmon rearing habitat in the Columbia River Estuary, Oregon, 2004-10

Cited by 7 publications

References 4 publications

Evidence‐based evaluation of the cumulative effects of ecosystem restoration

Evidence‐based evaluation of the cumulative effects of ecosystem restoration

A Synthesis of Environmental and Plant Community Data for Tidal Wetland Restoration Planning in the Lower Columbia River and Estuary

The Effects of Juvenile American Shad Planktivory on Zooplankton Production in Columbia River Food Webs

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