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Syringodium filiforme, commonly known as manatee grass, is a species of marine seagrass. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico, and is also found in the Bahamas and Bermuda. [1] [2] It occurs to a depth of about 20 m (66 ft), and even deeper where water is very clear. [1]
Typical flow speeds in the ocean are around 0.1 m s −1, generally one to two orders of magnitude weaker than typical atmospheric flows (1–10 m s −1), that can limit dispersal. [52] However, as seawater density is approximately 1000 times greater than air, momentum of a moving mass of water at the same speed is three orders of magnitude ...
This seagrass is sensitive to light deprivation and a lowering of salinity in its environment. In a major flooding event in Queensland, half the seagrasses were lost in a shallow study area in Moreton Bay, the Syringodium isoetifolium disappearing almost completely while Zostera muelleri and other seagrass species survived, relatively unaffected. [4]
Since the late 19th century, over 20% of the global seagrass area has been lost, with seagrass bed loss occurring at a rate of 1.5% each year. [119] Of the 72 global seagrass species, approximately one quarter (15 species) could be considered at a Threatened or Near Threatened status on the IUCN’s Red List of Threatened Species. [ 120 ]
The plant's preferred salinity range is 25 to 38.5 parts per thousand with a temperature range of 20 to 30 °C (68 to 86 °F). It is found from the low-tide mark down to depths of 30 metres (98 ft), depending on water clarity. It often grows in meadows with other seagrasses where it is the climax species. [7]
The seagrass wrasse (Novaculoides macrolepidotus) is a species of wrasse native to the Indian Ocean and the western Pacific Ocean. It can be found in lagoons and mangrove forests in seagrass beds or on sandy areas with plentiful algal growth. It occurs at depths from the surface to 10 m (33 ft).
Zostera marina is a flowering vascular plant species as one of many kinds of seagrass, with this species known primarily by the English name of eelgrass with seawrack much less used, and refers to the plant after breaking loose from the submerged wetland soil, and drifting free with ocean current and waves to a coast seashore.
Halophila is the only genus of seagrass that lacks basal sheaths on the leaf stems. Halophila decipiens has thin rhizomes that run along near the surface of sand or mud, with a root at each node to anchor the plant in place. The almost stemless leaves grow in pairs from the nodes with a pair of scales at their base.