Likely Reef Tank Suitable. Of these, 6 are known throughout the tropical western hemisphere, while Halophila johnsonii is known only from coastal lagoons of eastern Florida, . Min Depth 1 meters. They move from flower to flower, feeding and spreading the pollen from male to female. Synonyms. Le nom générique Thalassia , du grec thalassa (« mer ») et du suffixe latin -ia (« relatif à ») [ 2 ] , [ 3 ] , désigne une plante marine. Tropicos.org 2018. 20. [6], Turtle grass grows in meadows in calm shallow waters throughout the Caribbean Sea and the Gulf of Mexico, and as far north as Cape Canaveral in Florida. Banks & Sol. phylum Tracheophyta class Liliopsida order Alismatales family Hydrocharitaceae ... Thalassia testudinum Banks & Sol. Phylum PLANTS-STREPTOPHYTA: NCBI Taxonomy ID 55497. The main propagation method is by extension of the underground rhizome, or stem. Thalassia in The Plant List Version 1.1. Pour la reproduction sexuée, il a été récemment démontré que de petits invertébrés marins tels que les amphipodes et les polychètes participent à la pollinisation de cette espèce sous-marine[5]. Powered by Create your own unique website with customizable templates. Some nodes are leafless but others bear a tuft of several erect, linear leaf blades. There might be some translation errors. Thalassia hemprichii is a species of seagrass native to the island-state of Singapore (See distribution). [18], Turtle grass and other seagrasses form meadows which are important habitats and feeding grounds. Phylum: Angiospermophyta Genus: Thalassia Species: Thalassia testudinum Common Name: Turtle- Grass. Classification. In general, the population of this grass is stable. Seeds begin to develop in about 2–4 weeks if fertilization occurred. De nombreuses espèces marines se nourrissent de cette plante, s'abritent ou se reproduisent dans la zone de calme créée entre ses feuilles. 1981. [5] Decaying turtle grass leaves are responsible for the majority of detritus in meadow areas. Thalassia testudinum | Banks & Solander ex König . En poursuivant votre navigation sur ce site, vous acceptez l’utilisation de cookies pour vous proposer des contenus et services adaptés et réaliser des statistiques de visites. Les fleurs staminées (mâles) se forment par inflorescence de 1 à 3 fleurs[2]. Sexual reproduction takes place from April to July depending on location, though flowering has been observed during warm winters in Tampa Bay, Florida. 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 often grows in meadows with other seagrasses where it is the climax species. Noms. Les feuilles vertes linéaires, dressées dans l'eau, poussent groupées autour d’une tige très courte. Family Hydrocharitaceae. Underwater video cameras have more recently revealed crustaceans, polychaetes, and amphipods swimming towards open male flowers. Elle exige une salinité élevée et ne pousse pas dans les zones trop souvent battues par les vagues, bien qu'elle supporte une exondation et une exposition occasionnelle à l'air durant les marées basses de fort coefficient. (2012): Beautiful Seagrasses – Keeping True Flowering Plants in Your Marine Aquarium|Reefland.com. slideshow. Thalassia testudinum a été décrite scientifiquement pour la première fois en 1805 par le naturaliste britannique Joseph Banks dans Annals of Botany, Volume 2, édité par le naturaliste allemand Karl Dietrich Eberhard König[6]. The flowers are large, greenish white to pale pink and produce prominent seed pods that often … Although asexual propagation results in an increase in the size of the turtle grass bed, extensive asexual reproduction limits genetic diversity and can put the meadow at severe risk if there is a disease outbreak. Thalassia testudinum Banks & Sol. Thalassia hemprichii ( Asch. Bot. [15][11] After about 8 weeks of growth, the fruit undergoes dehiscence (botany), which releases neutrally buoyant seeds into the water column. The flowers grow on short stalks in the axils of the leaves and are greenish-white, sometimes tinged pink, and are followed by seed pods. Free and Open Access to Biodiversity Data. On the morphology and anatomy of turtle grass, Van Tussenbroek BI, Wond JGR, Marquez-Guzman J. Associated seagrass species include Halophila engelmannii and Syringodium filiforme. It gives rise to erect, green leaves. [13][11][9][5] If an event occurs producing significant water turbulence, an immature fruit may break off from the peduncle. Elles mesurent 30 cm de longueur en moyenne (en fait entre 10 et 60 cm) pour 0,4 à 1,8 cm de largeur[1],[2]. Species. A flat bladed, dark green sea grass featuring an extensive root system that securely anchors and protects the plants from tidal surge, storms and ocean currents. Les feuilles ralentissant le courant et les rhizomes implantés dans les sédiments permettent une stabilisation du substrat et limitent fortement son érosion. Thalassia. Global Biodiversity Information Facility. Thalassia est un genre de plantes monocotylédones sous-marines de la famille des Hydrocharitaceae. Indian River Lagoon, FL, was provided by Hall and Eiseman (1981). They are finely veined and rounded at the tips. N° 1965. The leaves are ribbon-like, about ½ inch wide and often reach heights of up to 14 inches long. Given their widespread occurrence on the shelf, it is likely that the ecological relationships between seagrasses and coral reef complexes warrant further investigation. Missouri Botanical Garden. Many epiphytes grow on the grasses, and algae, diatoms and bacterial films cover the surface of the leaf blades. "Scientists Discover an Underwater Pollinator | Hakai Magazine", https://en.wikipedia.org/w/index.php?title=Thalassia_testudinum&oldid=993339943, Creative Commons Attribution-ShareAlike License, This page was last edited on 10 December 2020, at 02:39. 20. Comme les autres espèces du genre Thalassia, Thalassia testudinum est monoïque stricte, c'est-à-dire que les organes mâles et femelles sont situés dans des fleurs différentes d'un même individu. Sorry about that ;-) Thalassia testudinum. Extensive meadows can be formed on muddy sand, and coarse sandy and clayey seabeds, especially those with a calcareous content. Lorsque les eaux sont claires, elle peut se développer jusqu'à 20 m de profondeur[1], même si on la trouve plus fréquemment à moins de 10 m de profondeur[2]. Disclaimer: ITIS taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. It is found from the low-tide mark down to depths of 30 metres (98 ft), depending on water clarity. Elle possède un rhizome horizontal profondément enfoui sous les sédiments marins (jusqu'à 25 cm), de 3 à 6 mm de diamètre[1],[2]. This is one way viviparous seedlings can start new patches of seagrass. La floraison a lieu en mai-juin, alors que les journées sont longues en jours longs (mai-juin), la fructification entre juin et juillet, et les fruits mûrs se détachent de la plante-mère au cours du mois d'août[4]. En effet, plusieurs espèces marines herbivores se nourrissent de ses feuilles, notamment la tortue verte (Chelonia mydas)[1]. There might be some translation errors. Thalassia testudinum également appelée « herbe à tortue », est une plante qui pousse sur les fonds marins tropicaux et forme des herbiers qui constituent des zones de frai pour les poissons. [18], Rhizomatous green algae in the genus Caulerpa often live among the grasses and many animal make seagrass meadows their home. 469: 1-6. Elle exige une épaisseur de sédiments suffisante pour permettre le développement de ses rhizomes[1] mais autrement, elle se développe sur des fonds marins variés (récifs morts, sable corallien, roches sédimentaires, vases, etc.)[2]. Dernière modification le 5 novembre 2017, à 13:52, https://fr.wikipedia.org/w/index.php?title=Thalassia_testudinum&oldid=142307428, licence Creative Commons attribution, partage dans les mêmes conditions, comment citer les auteurs et mentionner la licence. Thalassia f. A taxonomic genus within the family Hydrocharitaceae – certain seagrasses. Bacteria (common noun bacteria, singular bacterium) is a type of biological cell. Thalassia. 1975. Thalassie, herbe à lamantin, mais ce dernier nom est plutôt utilisé pour désigner une autre phanérogame marine : Syringodium filiforme. Observations on the reproductive ecology of, Phillips RC, McMillan C, Bridges KW. [11][12][13] At night when male flowers are fully mature, they release mucilaginous pollen into the water column. Halodule wrightii is the most common. Synchronized anthesis and predation on pollen in the marine angiosperm. Thalassia testudinum également appelée « herbe à tortue », est une plante qui pousse sur les fonds marins tropicaux et forme des herbiers qui constituent des zones de frai pour les poissons. Cette espèce vit dans les mers bordant les Caraïbes et dans le golfe du Mexique ; elle pousse donc sur les côtes atlantiques des États-Unis (du Texas à la Floride), du Mexique, de l'Amérique centrale, des îles des Caraïbes et des Antilles, ainsi que de la Colombie et du Venezuela, en Amérique du Sud. Le fruit, de couleur verte à vert-jaune ou rouge, est sphérique et a une peau rugueuse, couverte de petites pointes. Thalassia testudinum, commonly known as turtlegrass,[2] is a species of marine seagrass. 1969. L'ovaire ne présente qu'une seule loge ; il est surmonté de 7 ou 8 styles[2]. Marine Ecology Progress Series. There are thirteen families in the order and more than 356 species. This grass favours high-salinity waters with low turbidity, such as calm lagoons. Elles subissent l’action de la mer et sont fortement érodées. Erosion des blocs calcaires (madrépores). Accessed Jul. See more » Bacteria. Thalassia testudinum turtle grass Classification. REPRODUCTION SEASON. Genus Thalassia. Elle n'a pas été observée plus au nord que Cape Canaveral, en Floride[1]. ex J.Koenig, 1805 Common names turtle-grass in English turtlegrass in English Bibliographic References. The grass is eaten by turtles, herbivorous parrotfish, surgeonfish, and sea urchins, while the leaf surface films are a food source for many small invertebrates. Phylum Magnoliophyta. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico . Chaque fleur porte 9 étamines libres dans lesquelles le pollen est englué dans une matrice gélatineuse ; la propagation de ce dernier se fera dans l'eau[2],[4]. - Pacific Turtlegrass (shores of the Western and Central Indo-Pacific); Thalassia testudinum (Banks ex K.D.König) - Caribbean Turtlegrass (Gulf of Mexico, Caribbean Sea, and Bermuda); References Elle est consommée par les tortues, d'où son nom vernaculaire. L'extension d'un banc de cette herbe se fait grâce à un marcottage naturel par le développement de l'extrémité des rhizomes. These include bivalves and other molluscs, polychaete worms, amphipods, juvenile fish (which hide among the leaf blades), sea urchin, crabs, and caridean shrimps. It gives rise to erect, green leaves. Thalassia is a marine seagrass genus comprising two known species.. Classification: Biota > Plantae (Kingdom) > Tracheophyta (Phylum) > Alismatales (Order) > Hydrocharitaceae (Family) > Thalassia (Genus) External links. If the new location has favorable environmental conditions, the seedling will begin to grow. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico. Thalassia testudinum is found in coral reefs, sand, mud, rocks, and rubble bottoms at depths between 0 to 10 meters. Powered by Create your own unique website with customizable templates. [5] Female turtle grass fruits develop into green capsule about 20–25 mm in diameter and can include 1-6 small seeds. The leaves arise in clusters. [4][5] These are up to 30 centimetres (12 in) long and 2 cm (0.8 in) wide and have rounded tips. Their bodies seagrass genus comprising two known species warrant further investigation pollen grains are carried through the water column tides. 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