Reproductive Ecology of Vallisneria americana Michaux (2007)
Nearly 20 years have passed since Korschgen and Green's publication (1988) on the ecology of Vallisneria americana, as a guide for restoration programs. While their report provides a wealth of...
McFarland, Dwilette G., Barko, John W.
In a series of controlled greenhouse experiments, growth and rooting depth characteristics of Hydrilla verticillata (L.f.) Royle and Myriophyllum spicatum L. were examined relative to sediment-N...
Smart, R. M., Barko, John W., McFarland, Dwilette G.
The report describes results of a greenhouse investigation of short- term (8 weeks duration) competition between the beneficial native plant Vallisneria americana and the introduced, problem plant...
Barko,John W., Klemer,Andrew R., McFarland,Dwilette G., Hennington,M. S.
In an attempt to improve water quality, a variety of experiments was conducted over a 2-year period in large (10-m-diameter) enclosed water columns. Specific objectives of these experiments were to...
McFarland, Dwilette G., Barko, John W.
In a 5-week greenhouse investigation, variations in the growth of both monecious and dieocious Hydrilla (Hydrilla verticilata (L. f.) Royle) were compared over a range of temperatures (12 to 32 C) on...
Barko, John W., James, William F., Taylor, William D., McFarland, Dwilette G.
The hypolimnion of Eau Galle Reservoir, Wisconsin, was treated with aluminum sulfate (alum) in 1986 to reduce excessive phytoplankton production associated with high phosphorus loading from anoxic,...
McCreary, Nancy J., McFarland, Dwilette G., Barko, John W.
This study examines the growth of Hydrilla verticillata (L.f) Royle and Potamogeton americanus C. and S. on both nitrogen-poor and nitrogen-rich sediments and assesses the nature and degree of...
McFarland, Dwilette G., Barko, John W.
The submersed aquatic vegetation (SAV) of the freshwater tidal Potomac River has a history of dramatic change in abundance and distribution. Following a four-decade absence in the tidal river...
Grodowitz, Michael J., McFarland, Dwilette G.
This technical note describes experimentation used to develop methods of culturing Hydrilla verticillata (L. f.) Royle (hydrilla) to obtain plants with consistent but wide-ranging nutritional and...
Cofrancesco, Alfred F., McFarland, Dwilette G., Madsen, John D., Poovey, Angela G., Jones, Harvey L.
This technical note provides information on the potential effects of the native weevil Euhrychiopsis lecontei on growth of Eurasian watermilfoil. Weevil impacts are identified based on evaluations of...