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

Insights into Estuary Habitat Loss in Western U.S. (Brophy et al, 2019)

2022-06-28T13:42:57+00:00

Effective conservation and restoration of estuarine wetlands require accurate maps of their historical and current extent, as well as estimated losses of these valued habitats. Existing coast-wide tidal wetland mapping does not explicitly map historical tidal wetlands that are now disconnected from the tides, which represent restoration opportunities; nor does it use water level models or high-resolution elevation data (e.g. lidar) to accurately identify current tidal wetlands. To better inform estuarine conservation and restoration, we generated new maps of current and historical tidal wetlands for the entire contiguous U.S. West Coast (Washington, Oregon, and California). The new maps are [...]

Insights into Estuary Habitat Loss in Western U.S. (Brophy et al, 2019)2022-06-28T13:42:57+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

Juvenile Coho Salmon Movement & Migration Through Tide Gates (Bass, 2010)

2022-06-28T13:45:25+00:00

Tidal marshlands in the upper estuary ecotone provide essential habitat for juvenile salmonids. In this environment, salmonids grow rapidly and acclimate to saltwater. Worldwide, tidal marshes have been diked and drained to provide agricultural and residential land. Tide gates are one-way doors integrated into dike systems that prevent saltwater flooding and allow upland drainage to the estuary during low tide. By preventing tidal exchange, tide gates have significant upstream effects on water temperature and chemistry, plant and animal community structure, and geomorphology. Since they are closed most of the day and may be difficult to pass when open, tide [...]

Juvenile Coho Salmon Movement & Migration Through Tide Gates (Bass, 2010)2022-06-28T13:45:25+00:00
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