Ruppia


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Ruppia

 

a genus of aquatic perennial herbs of the family Ruppiaceae (formerly included in the family Potamogetonaceae). Except for the inflorescence, the plant is completely submerged in the water. The threadlike leaves are alternate or opposite. The small, bisexual flowers are in a two-flowered terminal spike. A perianth is absent. The fruit generally consists of four to six drupaceous lobes borne by long, thin pedicels. There are three or four species, distributed in the temperate and subtropical zones. The plants grow in saltwater and brackish shallows along the shores of seas and inland waters. There are two species in the USSR—R. maritima and tassel pondweed (R. spiralis). The plants serve as food for swimming birds.

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Waterbird impacts on widgeongrass Ruppia maritime in a Mediterranean wetland: comparing bird groups and seasonal effects.
ind) non identified constitutes the majority of grains with RA%=79,3% and Ruppia maritima (Ruppiaceae) with1,8%, and two other grains which are Asteraceae sp.
purple needle grass Ruppiaceae Ditch-Grass Family Ruppia maritima L.
Seagrass beds, although sometimes monospecific, were frequently composed of two or three species mentioned in Table 2, but never Ruppia maritima.
According to Berns (33), salinity variation effect on Thalassia testudinum and Ruppia maritima induces changes in physical responses causing an increase in stress in the seagrass.
05) in the medians of dry-weight biomass (grams of dry weight per square meter) of Halodule wrightii and Ruppia maritima, in the denser stands (category 3), between the last three sampled periods.
Physiological effects of short term salinity changes on Ruppia maritima.
Habitat types in Nueces Bay include unvegetated bay bottom, oyster reef (Crassostrea virginica), seagrass beds (Halodule wrightii and Ruppia maritima), and vegetated shorelines (Tunnell et al.
Para La Gomera conociamos unicamente la cita de Barranco de Agando sobre Benchijigua 800 m (Lid 1967), observandola nosotros tambien, si bien de manera escasa, en una pequena represa a la salida de Arure, junto a Ruppia maritima L.
Tidal submerged vegetation at lower two stations comprised Ruppia maritime and Vallisnerja americana while at the upper three stations Junkus rumariana and Spartina aleterniflora were dominant.
It was either the only phanerophyte in the water or shared the habitat with Ruppia maritima.