americana is unique to the Dresden reach, and provides crucial food resources (i.e., seeds and winter buds) for waterfowl, especially canvasbacks (Aythya valisneria; Korschgen et al., 1988).
Germination requirements of Vallisneria
natans seeds: implications for restoration in chinese lakes.
spiralis, Typha angustata, and Zannichellia palustris.
In order to avoid cannibalism during molting, pieces of PVC pipe (15 x 3 cm [conjunto vacio]), stones and macrophytes such as Vallisneria
gigantea, Elodea densa, aquatic Cabomba types were used as aquarium ornaments, creating a refuge for the animals.
A randomized block design transplant experiment conducted in five Adirondack lakes (Herkimer and Hamilton Counties, NY, USA) measured the relative growth rate (RGR) response of Myriophyllum tenellum, Lobelia dortmanna, Eriocaulon septangulare, Vallisneria
americana, Elodea canadensis, and Potamogeton robbinsii to a dissolved inorganic carbon (D1C) gradient over the summer of 1999.
Effect of salinity on the growth of Vallisneria
Brasenia schreberi, Vallisneria
americana, Chara braunii, Ricciocarpus natans, Ceratophyllum echinatum, and Zannichellia palustris were the rarest species, occurring at <5% of the survey sites, with the latter four species having been recorded from only a single site.
Hydrilla Hydrilla verticillata Eelgrasses Vallisneria
This category consisted primarily of saltmarsh cord grass (Spartina alterniflora), and smaller proportions of salt meadow-grass (Spartina patens), black needle-rush (Juncus roemerianus), salt grass (Distichlis spicata), bullrushes (Scirpus spp.), and cattails (Typha spp.); Submerged consisted primarily of shoalgrass aquatic (Halodule wrightii), wigeongrass vegetation (SAV) (Ruppia maritima), and a sporadic distribution of wild celery (Vallisneria
americana); Shallow non- generally restricted to waters less vegetated than 1 meter deep, including creeks, bottom (SNB) ponds, shoreline, and open bay habitat.
and dwarf Sagittaria are also commonly used oxygenators.
sp.) and their associated epiphytes.
The purpose of this project was to evaluate plant nutrient uptake of the macronutrients, phosphorus, nitrogen, and potassium on the algae (Cladophora sp.) and the aquatic plants (Vallisneria