Ecological communities dominated by sedges are known as sedgelands or sedge meadows. The nest is built in cattails, rushes, grasses, sedge, or in alder or willow bushes. The vegetation is predominantly tussock sedge and reedmace. Lush herbaceous meadows are typified by Sitka valerian and showy sedge. Johnson grass, Bermuda grass, and purple nut sedge. In waterlogged areas, moss, willow and sedge cover is substantial. Younger turtles may bask on sedge and alder hummocks. Some of the broads are surrounded by fens, i.e. reed and sedge beds. In meadows and around springs and seeps, willows and sedge grow. In addition to "Sphagnum" species, common sundew and the locally rare white sedge are present. Vegetation alongside the City's streams primarily consists of grass and sedge species. These areas contain original peat fen with communities of carr and sedge. In some cases, the males provide all of them (e.g. sedge warblers). A common sedge in this grassland phytocoenosis is "Carex shreberi". Grizzlies in Alaska supplement their diet of salmon and clams with sedge grass and berries.