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Posidonia oceanica has similar characteristics to terrestrial plants, such as roots, rhizomatous stem and cintiform leaves up to one metre long arranged in clumps of 6 to 7. It flowers in autumn and produces floating fruits in spring, commonly known as sea olives. It forms underwater meadows of considerable ecological importance.
Marine botany is the study of flowering vascular plant species and marine algae that live in shallow seawater of the open ocean and the littoral zone, along shorelines of the intertidal zone, coastal wetlands, and low-salinity brackish water of estuaries. It is a branch of marine biology and botany.
A seagrass meadow or seagrass bed is an underwater ecosystem formed by seagrasses. Seagrasses are marine (saltwater) plants found in shallow coastal waters and in the brackish waters of estuaries. Seagrasses are flowering plants with stems and long green, grass-like leaves.
Seagrasses are a paraphyletic group of marine angiosperms which evolved in parallel three to four times from land plants back to the sea. The following characteristics can be used to define a seagrass species: It lives in an estuarine or in the marine environment, and nowhere else. The pollination takes place underwater with specialized pollen.
Date/Time Thumbnail Dimensions User Comment; current: 19:17, 5 June 2023: 2,753 × 1,538 (3.46 MB): Ajhuheu: do not add east germany or vojvodina: 01:00, 11 July 2022
The names are: The Red Sea, White Sea, Black Sea, and Yellow Sea. Their names are given by the color of the water. Sometimes a system of color symbolism was used as the following method green or light blue for east, black or dark for north, white for west, and red for south. This method is called cardinal directions. [1]
Armeria maritima, the thrift, sea thrift or sea pink, is a species of flowering plant in the family Plumbaginaceae. It is a compact evergreen perennial which grows in low clumps and sends up long stems that support globes of bright pink flowers. In some cases purple, white or red flowers also occur.
Sea grass is the only type of flowering plant that grows in British seas, but it nonetheless forms vast beds. Invertebrates in coastal Britain are very diverse and include brittle stars, hermit crabs, mussels, prawns, sponges, sea anemones and sea squirts. Efforts are made to conserve rare plants and animals in nature reserves.