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• 1. [Article] Lateral Channel Migration, Downcutting and Restoration Potential of the North Fork Siuslaw River

  Abstract -- The report contains information on the study's methodology, geologic setting of the North Fork Siuslaw River, recent history of the North Fork Siuslaw River, current condition, channel information, ...

  Citation × Citation Citation Abstract Copy Title: Lateral Channel Migration, Downcutting and Restoration Potential of the North Fork Siuslaw River Abstract -- The report contains information on the study's methodology, geologic setting of the North Fork Siuslaw River, recent history of the North Fork Siuslaw River, current condition, channel information, and what can be done to enhance the River. Title: Lateral Channel Migration, Downcutting and Restoration Potential of the North Fork Siuslaw River Abstract -- The report contains information on the study's methodology, geologic setting of the North Fork Siuslaw River, recent history of the North Fork Siuslaw River, current condition, channel information, and what can be done to enhance the River. Close

• 2. [Article] OSMB AIS Funds Final Report: Task 1 Boat Ramp Monitoring for New Zealand Mud Snails

  The New Zealand mud snail (Potamopyrgus antipodarum; NZMS) is an invasive species found in a variety of ecosystems in Oregon, including brackish estuaries, heavily used recreational rivers, and highly ...

  Citation × Citation Citation Abstract Copy Title: OSMB AIS Funds Final Report: Task 1 Boat Ramp Monitoring for New Zealand Mud Snails Author: Brenneis, Valance, Cimino, Samuel, Strecker, Angela L. Year: 2013 The New Zealand mud snail (Potamopyrgus antipodarum; NZMS) is an invasive species found in a variety of ecosystems in Oregon, including brackish estuaries, heavily used recreational rivers, and highly trafficked coastal freshwater lakes. NZMS are an invasive species of concern because once established, they may out-compete native invertebrate grazers, such as native insect larvae that provide important food resources for fish, and NZMS themselves provide little nutritional value. Monitoring for the presence and population density of NZMS was performed at boat ramps located along several water bodies in 2006 – 2007. These water bodies were then re-sampled during the summer of 2012 and winter of 2013 to investigate changes in population densities, as well as the potential spread of NZMS. In addition, six brackish estuaries and six freshwater coastal lakes were sampled in the summer of 2013 once again for population densities but also for stable isotope analysis to better understand the influence NZMS may have on these different ecosystem food webs. This work addresses how NZMS densities differ across invaded sites, how densities vary over time, how community diversity in rivers and estuaries varies between sites and over time, whether there is a correlation between NZMS densities and invertebrate diversity, and whether NZMS density correlates with decreasing dietary specificity for competing benthic invertebrates. Samples were sorted, identified, and counted, and stable isotope analyses from the summer 2013 field season were conducted on macroinvertebrates, zooplankton, and primary producers at the UC Davis Stable Isotope Facility. NZMS densities were found to be dynamic, with population densities increasing and decreasing over time and space. Additionally, two waterbodies (the lower Siuslaw River and the Nestucca River Estuary) previously without reported NZMS presence were identified to have established NZMS populations. Across invaded sites during the 2006 and 2012 sampling periods, there was a strong negative correlation between NZMS density and the diversity of the benthic invertebrate community. Within sites, no significant correlation was detected. High NZMS population densities were found to have a significantly negative relationship with detritivore density populations in the freshwater lake sites sampled in the summer of 2013. There were no significant relationships between NZMS and the density of any particular macroinvertebrate feeding habit group in estuaries. Additionally, stable isotope analyses indicated that NZMS at high population densities in the freshwater lakes share a similar stable isotope signature with macroinvertebrate herbivores, but NZMS had a more specific or narrow dietary range suggesting macroinvertebrate herbivores had more generalized diets than NZMS when at high densities. Conversely, NZMS population densities in the brackish estuary ecosystems showed no discernable patterns from the stable isotope analyses to indicate that their presence, either at high or low density, had an effect on the estuarine food webs. We concluded that continued research on long term population dynamics of invasive species like NZMS and their effects on native food webs remain crucial to future management and mitigation. Title: OSMB AIS Funds Final Report: Task 1 Boat Ramp Monitoring for New Zealand Mud Snails Author: Brenneis, Valance, Cimino, Samuel, Strecker, Angela L. Year: 2013 The New Zealand mud snail (Potamopyrgus antipodarum; NZMS) is an invasive species found in a variety of ecosystems in Oregon, including brackish estuaries, heavily used recreational rivers, and highly trafficked coastal freshwater lakes. NZMS are an invasive species of concern because once established, they may out-compete native invertebrate grazers, such as native insect larvae that provide important food resources for fish, and NZMS themselves provide little nutritional value. Monitoring for the presence and population density of NZMS was performed at boat ramps located along several water bodies in 2006 – 2007. These water bodies were then re-sampled during the summer of 2012 and winter of 2013 to investigate changes in population densities, as well as the potential spread of NZMS. In addition, six brackish estuaries and six freshwater coastal lakes were sampled in the summer of 2013 once again for population densities but also for stable isotope analysis to better understand the influence NZMS may have on these different ecosystem food webs. This work addresses how NZMS densities differ across invaded sites, how densities vary over time, how community diversity in rivers and estuaries varies between sites and over time, whether there is a correlation between NZMS densities and invertebrate diversity, and whether NZMS density correlates with decreasing dietary specificity for competing benthic invertebrates. Samples were sorted, identified, and counted, and stable isotope analyses from the summer 2013 field season were conducted on macroinvertebrates, zooplankton, and primary producers at the UC Davis Stable Isotope Facility. NZMS densities were found to be dynamic, with population densities increasing and decreasing over time and space. Additionally, two waterbodies (the lower Siuslaw River and the Nestucca River Estuary) previously without reported NZMS presence were identified to have established NZMS populations. Across invaded sites during the 2006 and 2012 sampling periods, there was a strong negative correlation between NZMS density and the diversity of the benthic invertebrate community. Within sites, no significant correlation was detected. High NZMS population densities were found to have a significantly negative relationship with detritivore density populations in the freshwater lake sites sampled in the summer of 2013. There were no significant relationships between NZMS and the density of any particular macroinvertebrate feeding habit group in estuaries. Additionally, stable isotope analyses indicated that NZMS at high population densities in the freshwater lakes share a similar stable isotope signature with macroinvertebrate herbivores, but NZMS had a more specific or narrow dietary range suggesting macroinvertebrate herbivores had more generalized diets than NZMS when at high densities. Conversely, NZMS population densities in the brackish estuary ecosystems showed no discernable patterns from the stable isotope analyses to indicate that their presence, either at high or low density, had an effect on the estuarine food webs. We concluded that continued research on long term population dynamics of invasive species like NZMS and their effects on native food webs remain crucial to future management and mitigation. Close

• 3. [Article] The Siuslaw pioneer ; 1975

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1975 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1975 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 4. [Article] The Siuslaw pioneer ; 1959

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1959 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1959 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 5. [Article] The Siuslaw pioneer ; 1961

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1961 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1961 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 6. [Article] Ecology and Management of Coastal Cutthroat Trout in Oregon

  Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. ...

  Citation × Citation Citation Abstract Copy Title: Ecology and Management of Coastal Cutthroat Trout in Oregon Author: Giger, Richard D., Oregon State Game Commission Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. Seawater tolerance, growth and age, survival, population size, migrations, estuarine distribution, and catch were examined through laboratory studies, fishery monitoring, netting and tagging and other methods. Title: Ecology and Management of Coastal Cutthroat Trout in Oregon Author: Giger, Richard D., Oregon State Game Commission Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. Seawater tolerance, growth and age, survival, population size, migrations, estuarine distribution, and catch were examined through laboratory studies, fishery monitoring, netting and tagging and other methods. Close

• 7. [Article] Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon

  Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well ...

  Citation × Citation Citation Abstract Copy Title: Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon Author: Bulkley, Ross V., Oregon State Game Commission Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well as the contribution of hatchery fish to the catch. Title: Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon Author: Bulkley, Ross V., Oregon State Game Commission Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well as the contribution of hatchery fish to the catch. Close

• 8. [Article] Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon

  At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and ...

  Citation × Citation Citation Abstract Copy Title: Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon Author: Bayer, Range D., 1947-, Lowe, Roy W., 1953- At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and Range Bayer completed 429 censuses. Unfortunately, these censuses do not give a complete picture of the seasonality, abundance, and distribution for all waterbirds or mammals at Siuslaw Estuary because USFWS biologists mainly censused waterfowl, Bayer pooled all gulls and "peeps," only Bayer censused mammals, no one censused the entire Siuslaw Channel for all birds, and no one made many censuses in summer. Further, only Woolington sometimes censused nonwaterfowl in intertidal salt marshes. Nevertheless, there are sufficient censuses to greatly elucidate the status and distribution of many species. Highlights are given in the rest of this paragraph. Humans, especially those with hunting dogs, sometimes disrupted bird activity. Harbor seals regularly rested in the water or hauled out at two embayments in the lower Siuslaw Estuary during high tide. Brown Pelicans were uncommon. The Siuslaw region is a very important area along the Oregon Coast for wintering Tundra Swans, but their abundance sometimes changes from year to year. Great Basin Canada Geese (which were released here in 1983) now nest at the Siuslaw and appear to be permanent residents with some migrants sometimes swelling the population. Dabbling ducks and diving ducks were most abundant in January-March. Osprey and Bald Eagles were occasionally present in low numbers, but no Peregrine Falcons or Snowy Plovers were reported. American Coot numbers averaged less than 10/census. Yellowlegs and Whimbrels were only recorded during spring and fall migrations. Sanderlings were the most common "peep" in winter with as many as 260 recorded. Western Gull nesting was not apparent in the Estuary. Crows were abundant in intertidal areas in November-March, and Common Ravens were not numerous but were seen surprisingly often. Several birds normally considered as "terrestrial" were occasionally found on intertidal rocks, mudflats, or sandflats. It is also clear from these censuses that there can often be significant within-day (i.e., tidal), within-month, seasonal, and yearly variation in bird numbers. If possible, there should be several censuses each month under similar tidal conditions, so that the range in monthly variation can be determined. Unless monthly variation is measured each year, apparent differences in animal numbers between years may not represent real yearly variation in animal populations but may simply be artifacts of inadequate censusing. Unfortunately, it may not be feasible to do more than one census each month. But if the results are cautiously interpreted, one census/month is valuable and is certainly better than none. Because of the different censusing methods of Woolington, Bayer, and USFWS Biologists; it isn't possible to robustly compare their different study areas at the Siuslaw. However, a few comments about specific areas are in order. Many waterbird taxa (especially waterfowl) were more abundant east of the Highway 101 bridge at Florence than west of the bridge. The South Jetty Deflation Plain was the most important area at the Siuslaw for Tundra Swans. Site 8 (which is proposed to become a boat marina) was used by a greater variety of birds and usually more birds than the two adjacent, potential mitigation sites. Finally, Wendson Pasture received the heaviest use by Canada Geese and dabbling ducks of any area that was censused at the Siuslaw. Title: Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon Author: Bayer, Range D., 1947-, Lowe, Roy W., 1953- At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and Range Bayer completed 429 censuses. Unfortunately, these censuses do not give a complete picture of the seasonality, abundance, and distribution for all waterbirds or mammals at Siuslaw Estuary because USFWS biologists mainly censused waterfowl, Bayer pooled all gulls and "peeps," only Bayer censused mammals, no one censused the entire Siuslaw Channel for all birds, and no one made many censuses in summer. Further, only Woolington sometimes censused nonwaterfowl in intertidal salt marshes. Nevertheless, there are sufficient censuses to greatly elucidate the status and distribution of many species. Highlights are given in the rest of this paragraph. Humans, especially those with hunting dogs, sometimes disrupted bird activity. Harbor seals regularly rested in the water or hauled out at two embayments in the lower Siuslaw Estuary during high tide. Brown Pelicans were uncommon. The Siuslaw region is a very important area along the Oregon Coast for wintering Tundra Swans, but their abundance sometimes changes from year to year. Great Basin Canada Geese (which were released here in 1983) now nest at the Siuslaw and appear to be permanent residents with some migrants sometimes swelling the population. Dabbling ducks and diving ducks were most abundant in January-March. Osprey and Bald Eagles were occasionally present in low numbers, but no Peregrine Falcons or Snowy Plovers were reported. American Coot numbers averaged less than 10/census. Yellowlegs and Whimbrels were only recorded during spring and fall migrations. Sanderlings were the most common "peep" in winter with as many as 260 recorded. Western Gull nesting was not apparent in the Estuary. Crows were abundant in intertidal areas in November-March, and Common Ravens were not numerous but were seen surprisingly often. Several birds normally considered as "terrestrial" were occasionally found on intertidal rocks, mudflats, or sandflats. It is also clear from these censuses that there can often be significant within-day (i.e., tidal), within-month, seasonal, and yearly variation in bird numbers. If possible, there should be several censuses each month under similar tidal conditions, so that the range in monthly variation can be determined. Unless monthly variation is measured each year, apparent differences in animal numbers between years may not represent real yearly variation in animal populations but may simply be artifacts of inadequate censusing. Unfortunately, it may not be feasible to do more than one census each month. But if the results are cautiously interpreted, one census/month is valuable and is certainly better than none. Because of the different censusing methods of Woolington, Bayer, and USFWS Biologists; it isn't possible to robustly compare their different study areas at the Siuslaw. However, a few comments about specific areas are in order. Many waterbird taxa (especially waterfowl) were more abundant east of the Highway 101 bridge at Florence than west of the bridge. The South Jetty Deflation Plain was the most important area at the Siuslaw for Tundra Swans. Site 8 (which is proposed to become a boat marina) was used by a greater variety of birds and usually more birds than the two adjacent, potential mitigation sites. Finally, Wendson Pasture received the heaviest use by Canada Geese and dabbling ducks of any area that was censused at the Siuslaw. Close

• 9. [Article] The Siuslaw pioneer ; 1948

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1948 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1948 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 10. [Article] The Siuslaw pioneer ; 1950

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1950 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1950 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close