2019 12-Year Assessment of the State of Oregon Coast Coho Conservation Plan (OR Fish & Wildlife Commission, 2021)

2022-06-28T13:47:00+00:00

The Oregon Coast Coho Conservation Plan was approved by the Oregon Fish and Wildlife Commission in 2007 as the State of Oregon’s conservation and management plan for the Oregon Coast Evolutionarily Significant Unit of coho salmon (OC Coho ESU). The plan provides a conservation framework for attaining a broad sense desired status at which Oregon Coast coho salmon will be sufficiently abundant, productive, and diverse to be self-sustaining, and provide significant environmental, cultural, and economic benefits. Broad sense goals are long-term ambitions (~50 years) expected to be attained after sustained conservation actions and investments in habitat protection and restoration. [...]

2019 12-Year Assessment of the State of Oregon Coast Coho Conservation Plan (OR Fish & Wildlife Commission, 2021)2022-06-28T13:47:00+00:00

How Value Conflicts Infected the Science of Riparian Restoration for Endangered Salmon Habitat the Pacific Northwest (Chapman et al, 2020)

2022-06-28T13:44:20+00:00

Conservation policy relies on input from science, yet scientists are often frustrated by the ‘gap’ between their recommendations and policy decisions. In this paper we examine one such ‘gap’: how a long-standing conflict of values functioned to ‘infect’ the synthesis and application of riparian science for salmon habitat restoration projects. We do this by analysis of a policy debate over the required minimum width of riparian buffers in voluntary conservation programs on agricultural lands in the Puget Sound region of Washington State. Based on an analysis of expert interviews and document analysis, we first outline the key features of [...]

How Value Conflicts Infected the Science of Riparian Restoration for Endangered Salmon Habitat the Pacific Northwest (Chapman et al, 2020)2022-06-28T13:44:20+00:00

Sediment Accretion Blue Carbon Burial in Tidal Saline Wetlands (Peck et al, 2020)

2022-06-28T13:52:02+00:00

Oregon estuaries provide important opportunities to assess controls on tidal saline wetland carbon burial and sediment accretion as both rates of relative sea level rise (RSLR; −1.4 ± 0.9 to 2.8 ± 0.8 mm yr−1 ) and fluvial suspended sediment load relative to estuary area (0.23 to 17 × 103 t km−2 yr−1 ) vary along the coast. We hypothesized that vertical accretion, measured using excess 210Pb in least‐disturbed wetlands within seven Oregon estuaries, would vary with either RSLR or sediment load relative to estuary area, and carbon burial would correlate strongly to sediment accretion. Mean rates of high [...]

Sediment Accretion Blue Carbon Burial in Tidal Saline Wetlands (Peck et al, 2020)2022-06-28T13:52:02+00:00

Managing Climate Refugia for Freshwater Fishes (Ebersole et al, 2020)

2022-06-28T13:52:25+00:00

Within the context of climate adaptation, the concept of climate refugia has emerged as a framework for addressing future threats to freshwater fish populations. We evaluated recent climate-refugia management associated with water use and landscape modification by comparing efforts in the US states of Oregon and Massachusetts, for which there are contrasting resource use patterns. Using these examples, we discuss tools and principles that can be applied more broadly. Although many early efforts to identify climate refugia have focused on water temperature, substantial gains in evaluating other factors and processes regulating climate refugia (eg stream flow, groundwater availability) are [...]

Managing Climate Refugia for Freshwater Fishes (Ebersole et al, 2020)2022-06-28T13:52:25+00:00

Comparing Historical Losses of Forested, Scrub-shrub, & Emergent Tidal Wetlands on the Oregon Coast (Brophy, 2019)

2022-06-28T13:40:38+00:00

This study evaluated historical extent (prior to European settlement), current extent, and losses for each of the three major tidal wetland types (emergent, scrub-shrub, and forested) on the Oregon coast. The first study of its kind on the Oregon coast, it produced results vital to conservation and restoration planning, since these wetland types are often targets for restoration and each type supplies unique ecosystem services. The study included the coast's 15 largest estuaries; they contain 96.5% of the coast's historical tidal wetland area, so results are representative of the coast in general. VIEW PDF

Comparing Historical Losses of Forested, Scrub-shrub, & Emergent Tidal Wetlands on the Oregon Coast (Brophy, 2019)2022-06-28T13:40:38+00:00

Future Stream Temperature Sensitivity Factors (Wondzell et al, 2019)

2022-06-28T13:52:40+00:00

Simulations of stream temperatures showed a wide range of future thermal regimes under a warming climate — from 2.9°C warmer to 7.6°C cooler than current conditions — depending primarily on shade from riparian vegetation. We used the stream temperature model, Heat Source, to analyze a 37-km study segment of the upper Middle Fork John Day River, located in northeast Oregon, USA. We developed alternative future scenarios based on downscaled projections from climate change models and the composition and structure of native riparian forests. We examined 36 scenarios combining future changes in air temperature (DTair = 0°C, +2°C, and +4°C), [...]

Future Stream Temperature Sensitivity Factors (Wondzell et al, 2019)2022-06-28T13:52:40+00:00

A Process‐Based Approach to Restoring Depositional River Valleys (Powers et al, 2018)

2022-06-28T13:40:46+00:00

Stream restoration approaches most often quantify habitat degradation, and therefore recovery objectives, on aquatic habitat metrics based on a narrow range of species needs (e.g., salmon and trout), as well as channel evolution models and channel design tools biased toward single‐threaded, and “sediment‐balanced” channel patterns. Although this strategy enhances perceived habitat needs, it often fails to properly identify the underlying geomorphological and ecological processes limiting species recovery and ecosystem restoration. In this paper, a unique process‐based approach to restoration that strives to restore degraded stream, river, or meadow systems to the premanipulated condition is presented. The proposed relatively simple [...]

A Process‐Based Approach to Restoring Depositional River Valleys (Powers et al, 2018)2022-06-28T13:40:46+00:00

Methods to Predict Beaver Dam Occurrence in Coastal Oregon (Petro et al, 2018)

2022-06-28T13:41:01+00:00

Pools provided by beaver (Castor canadensis) contribute to critical habitat requirements of salmonids in fluvial systems of the Pacific Northwest, therefore more land managers are interested in managing watersheds that include beavers or engaging in beaver-related restoration projects. We evaluated the utility of applying an existing beaver habitat suitability model to better understand beaver dam site characteristics in coastal Oregon, identify optimum dam site locations, and guide future beaver-related restoration efforts. We used a combination of t-tests, Wilcoxon rank sum tests, and a stepwise discriminant function analysis to examine stream habitat associations with field data collected at known and [...]

Methods to Predict Beaver Dam Occurrence in Coastal Oregon (Petro et al, 2018)2022-06-28T13:41:01+00:00

Effects of Intertidal Water Crossing Structures on Estuarine Fish & Habitat (Munsch et al, 2017)

2022-06-28T13:42:49+00:00

For hundreds of years, people have built water crossing structures to enable the transportation of people, livestock, vehicles, and materials across rivers and other bodies of water. These structures have often created barriers to fish passage, an issue which has recently drawn intense scrutiny due to concerns over impacts to anadromous fish. While much work has focused on the impacts of freshwater crossing structures, intertidal structures have received less attention. This may be due to the importance of passage for adult anadromous fish in freshwater, and that bidirectional flows in intertidal environments complicate interpretation of structures as barriers. Intertidal [...]

Effects of Intertidal Water Crossing Structures on Estuarine Fish & Habitat (Munsch et al, 2017)2022-06-28T13:42:49+00:00

Stream Evolution Model Integrating Habitat & Ecosystem Benefits (Thorne, 2013)

2022-06-28T13:44:13+00:00

For decades, Channel Evolution Models have provided useful templates for understanding morphological responses to disturbance associated with lowering base level, channelization or alterations to the flow and/or sediment regimes. In this paper, two well-established Channel Evolution Models are revisited and updated in light of recent research and practical experience. The proposed Stream Evolution Model includes a precursor stage, which recognizes that streams may naturally be multi-threaded prior to disturbance, and represents stream evolution as a cyclical, rather than linear, phenomenon, recognizing an evolutionary cycle within which streams advance through the common sequence, skip some stages entirely, recover to a [...]

Stream Evolution Model Integrating Habitat & Ecosystem Benefits (Thorne, 2013)2022-06-28T13:44:13+00:00

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