Relationship Between Hydro-regime and Coho Salmon Redd Construction in the Smith River, Oregon (Butler et al, 2021)

2022-06-28T13:49:41+00:00

Adult salmonid migration to natal habitats and spawning are affected both by physiological factors and environmental conditions. While research has focused on physiological thresholds that influence the initiation of migration, few studies have investigated the relationship between both hydrological and thermal conditions and salmon spawning throughout the course of the reproductive period. We examined whether Oregon coastal coho salmon (Oncorhynchus kisutch) returning to three tributaries of the Smith River watershed (in the central Oregon Coast Range) responded to the stream hydroregime throughout their spawning period. Generalised linear mixed models were constructed to evaluate relationships between various stream discharge metrics, [...]

Relationship Between Hydro-regime and Coho Salmon Redd Construction in the Smith River, Oregon (Butler et al, 2021)2022-06-28T13:49:41+00:00

Identification of Historical Populations of Coho Salmon (NOAA, 2020)

2022-06-28T13:45:49+00:00

In 2003 the Oregon Workgroup (Workgroup) of the Oregon Northern California Coast Technical Recovery Team (TRT) convened to review and analyze information that could shed light on historical populations of Oregon Coast coho salmon (Oncorhynchus kisutch). This document presents the preliminary conclusions of the Workgroup. A historical perspective describing how these populations functioned is an important first step in assessing the viability of present-day populations, in developing delisting criteria, and as an overall recovery strategy. VIEW PDF

Identification of Historical Populations of Coho Salmon (NOAA, 2020)2022-06-28T13:45:49+00:00

Ecosystem Blue Carbon Stocks of the Pacific Northwest Coast (Kauffman et al, 2020)

2022-06-28T13:53:44+00:00

The coastal ecosystems of temperate North America provide a variety of ecosystem services including high rates of carbon sequestration. Yet, little data exist for the carbon stocks of major tidal wetland types in the Pacific Northwest, United States. We quantified the total ecosystem carbon stocks (TECS) in seagrass, emergent marshes, and forested tidal wetlands, occurring along increasing elevation and decreasing salinity gradients. The TECS included the total aboveground carbon stocks and the entire soil profile (to as deep as 3 m). TECS significantly increased along the elevation and salinity gradients: 217 ± 60 Mg C/ha for seagrass (low elevation/high [...]

Ecosystem Blue Carbon Stocks of the Pacific Northwest Coast (Kauffman et al, 2020)2022-06-28T13:53:44+00:00

Blue Carbon of the Pacific Northwest Coast (Kauffman et al, 2019)

2022-06-28T13:54:11+00:00

The coastal ecosystems of temperate North America provide a variety of ecosystem services including high rates of carbon sequestration. Yet, little data exist for the carbon stocks of major tidal wetland types in the Pacific Northwest, United States. We quantified the total ecosystem carbon stocks (TECS) in seagrass, emergent marshes, and forested tidal wetlands, occurring along increasing elevation and decreasing salinity gradients. The TECS included the total aboveground carbon stocks and the entire soil profile (to as deep as 3 m). TECS significantly increased along the elevation and salinity gradients: 217 ± 60 Mg C/ha for seagrass (low elevation/high salinity), [...]

Blue Carbon of the Pacific Northwest Coast (Kauffman et al, 2019)2022-06-28T13:54:11+00:00

Ecological Effects of Tide Gate Upgrade or Removal (Oregon Watershed Enhancement Board, 2018)

2022-06-28T13:40:31+00:00

This document reports on findings, conclusions and recommendations derived from scientific literature and knowledge regarding the effectiveness of tide gate removal or upgrade in improving conditions for Oregon’s native migratory fish species, particularly salmonids, and other plant and animal species that utilize estuarine ecosystems. The project was commissioned by the Oregon Watershed Enhancement Board (OWEB) to foster better understanding of the effectiveness of their past investments in estuary habitat restoration involving tide gates, and to aid in targeting future investments. This will be especially important because many less-complicated projects (e.g. those on public land, smaller, single-action projects, those with [...]

Ecological Effects of Tide Gate Upgrade or Removal (Oregon Watershed Enhancement Board, 2018)2022-06-28T13:40:31+00:00

Legal Ecotones: A Riparian Analysis of Riparian Policy Protection in the Oregon Coast Range (Boisjolie et al, 2017)

2022-06-28T13:44:58+00:00

Waterways of the USA are protected under the public trust doctrine, placing responsibility on the state to safeguard public resources for the benefit of current and future generations. This responsibility has led to the development of management standards for lands adjacent to streams. In the state of Oregon, policy protection for riparian areas varies by ownership (e.g., federal, state, or private), land use (e.g., forest, agriculture, rural residential, or urban) and stream attributes, creating varying standards for riparian land-management practices along the stream corridor. Here, we compare state and federal riparian landmanagement standards in four major policies that apply [...]

Legal Ecotones: A Riparian Analysis of Riparian Policy Protection in the Oregon Coast Range (Boisjolie et al, 2017)2022-06-28T13:44:58+00:00

5-Year Review Summary Evaluation of Oregon Coast Coho Salmon (NOAA, 2016)

2022-06-28T13:48:20+00:00

Many West Coast salmon and steelhead (Oncorhynchus sp.) stocks have declined substantially from their historic numbers and now are at a fraction of their historical abundance. There are several factors that contribute to these declines, including: overfishing, loss of freshwater and estuarine habitat, hydropower development, poor ocean conditions, and hatchery practices. These factors collectively led to the National Marine Fisheries Service’s (NMFS) listing of 28 salmon and steelhead stocks in California, Idaho, Oregon, and Washington under the Federal Endangered Species Act (ESA). VIEW PDF

5-Year Review Summary Evaluation of Oregon Coast Coho Salmon (NOAA, 2016)2022-06-28T13:48:20+00:00

Spatial Pattern of Fall Movement of Juvenile Coho Salmon in the West Fork Smith River, Oregon (Hance et al, 2016)

2022-06-28T13:49:19+00:00

For several species of Pacific salmon (Oncorhynchus spp.) inhabiting coastal temperate streams, juvenile fish have been recorded moving between mainstem and tributary habitats during the transition from the summer dry season to the winter wet season. Such movement that connects summer and winter habitats may be particularly important for coho salmon, O. kisutch, because availability of overwintering habitat can limit freshwater survival for this species. Here, I describe basin-scale variability in the spatial pattern of fall movement for juvenile coho salmon between mainstem and tributary streams during the fall of 2002, 2003, 2004, and 2005. Juvenile coho salmon were [...]

Spatial Pattern of Fall Movement of Juvenile Coho Salmon in the West Fork Smith River, Oregon (Hance et al, 2016)2022-06-28T13:49:19+00:00

Effects of Climate Change on Oregon Coast Coho Salmon (Wainwright et al, 2013)

2022-06-28T13:53:37+00:00

Coho salmon (Oncorhynchus kisutch) populations that spawn in the coastal rivers of Oregon, U.S.A., formerly supported robust fisheries but are now listed as a “threatened species” under the U.S. Endangered Species Act. Climate change is an increasing concern in salmon conservation, and we assess the effects of climate change on sustainability of this population group. Four distinct habitats are important to different life-history stages of coho salmon: terrestrial forests, freshwater rivers and lakes, estuaries, and the ocean. Each of these habitats is affected by multiple aspects of climate change, resulting in a complex web of pathways influencing sustainability. We [...]

Effects of Climate Change on Oregon Coast Coho Salmon (Wainwright et al, 2013)2022-06-28T13:53:37+00:00

Historical Splash-dam Mapping & Stream Disturbance Detection in the Oregon Coastal Province (Miller, 2010)

2022-06-28T13:41:53+00:00

Severe scouring from splash damming was one of the earliest reported forms of widespread anthropogenic disturbance in streams of the Pacific Northwest, USA. Splash damming was a common method of log transport in western Oregon from the 1880s through the 1950s. Before being released in large freshets to downstream lumber mills, water and logs were stored in reservoirs behind splash dams. Further protocol called for dynamiting downstream obstacles such as large boulders and natural logjams. In recent literature, the legacy effect of historical splash damming is proposed as contributing to currently poor habitat conditions for lotic species, such as [...]

Historical Splash-dam Mapping & Stream Disturbance Detection in the Oregon Coastal Province (Miller, 2010)2022-06-28T13:41:53+00:00
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