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Full-Text Articles in Fresh Water Studies
Lower Columbia River Aquatic Nonindigenous Species Survey 2001-2004, Mark Sytsma, Jeffery Cordell, John Chapman, Robyn Draheim
Lower Columbia River Aquatic Nonindigenous Species Survey 2001-2004, Mark Sytsma, Jeffery Cordell, John Chapman, Robyn Draheim
Center for Lakes and Reservoirs Publications and Presentations
Rates of aquatic nonindigenous species (ANS) introductions and their social, economic, and ecological impacts are increasing. Introductions of nonnative marine organisms have increased exponentially over the last two centuries and expenditures on outreach, control, and research exceed millions of dollars per species for several invaders of particular concern to the United States. These trends suggest that major changes are occurring in the freshwater, estuarine, and marine ecosystems of North America, but their magnitude is probably underestimated.
Report On The Oregon Ballast Water Management Program In 2004, Kiirsten Flynn, Mark Sytsma
Report On The Oregon Ballast Water Management Program In 2004, Kiirsten Flynn, Mark Sytsma
Center for Lakes and Reservoirs Publications and Presentations
This report was prepared for the Oregon legislature pursuant to HB 3620, which was passed during the 2003 session of the Oregon legislature to address management of ballast water discharged from ships. The bill removed sediment from the definition of ballast water, allowed discharge of treated ballast water, created a task force on ballast water management, and required this report. Includes List of Acronyms, charts, graphs and maps.
An Integrated Aquatic Vegetation Management Plan For Blue Lake, Fairview, Oregon, Mary Pfauth, Mark Sytsma
An Integrated Aquatic Vegetation Management Plan For Blue Lake, Fairview, Oregon, Mary Pfauth, Mark Sytsma
Center for Lakes and Reservoirs Publications and Presentations
Blue Lake, located in Fairview, is on the 1998 Oregon Department of Environmental Quality (ODEQ) 303(d) list of water quality impaired water bodies for violating the upper pH standard (8.5) and supporting abundant aquatic weeds and alge. The lake is eutrophic and has high algal productivity, especially in mid to late summer. Curlyleaf pondweed, a non-native, invasive aquatic plant species, restricts access to and use of Blue Lake by humans. Human uses of the lake which have been impaired including boating, water skiing, fishing, and swimming. Development of the current Integrated Aquatic Vegetation Management Plan was driven by the need …
Coastal Lakes Aquatic Plant Survey Report, Mary Pfauth, Mark Sytsma
Coastal Lakes Aquatic Plant Survey Report, Mary Pfauth, Mark Sytsma
Center for Lakes and Reservoirs Publications and Presentations
Invasive, non-indigenous plants can degrade water quality and fish habitat when they invade lakes, ponds, and streams. Changes in plant community architecture in lakes due to invasion by canopy-forming invasive aquatic plants can result in loss of native plant biodiversity and reduction of the structural complexity of the underwater habitat. Differences in photosynthetic biochemistry between non-indigenous and native plants can result in large diurnal pH and dissolved oxygen concentrations.