Free and Open Access to Biodiversity Data. Accessed: 2018 Jul. Zieman JC. Phylum: Angiospermophyta Genus: Thalassia Species: Thalassia testudinum Common Name: Turtle- Grass. Sexual reproduction takes place from April to July depending on location, though flowering has been observed during warm winters in Tampa Bay, Florida. Type Strain Culture Collection ID ... Thalassia testudinum: NCBI Tax ID 55497. Thalassia testudinum | Banks & Solander ex König . The Seegras is food for turtles and manatee, nursery for juvenile species and producer of Oxygen. (König & Sims) 2: 96 Haynes, Robert R. / Flora of North America Editorial Committee (eds. Phylum PLANTS-STREPTOPHYTA: NCBI Taxonomy ID 55497. Turtle grass is dioecious, which means that there are separate male and female plants, each which produce an imperfect flower containing only one sex. This grass is subject to periodic dieback episodes in the Florida Bay area. In hydrophilic pollination, the pollen grains are carried through the water column by tides or currents and deposited upon an open pistillate flower. 1964. Observations on the reproductive ecology of, Phillips RC, McMillan C, Bridges KW. Translation in process We're updating the page. [5], Its temporal range spans from the Middle Eocene to present. Powered by Create your own unique website with customizable templates. Published on the internet. Thalassia testudinum is the dominant seagrass in southeast Florida as well as the Florida gulf coast. [5] It has been found that where plants have been damaged mechanically, such as by the propellers of boats, the cut ends of rhizomes are unable to grow and holes may develop in the turtle grass meadow.[4]. Translation in process We're updating the page. Overall Geographic Range Americas, Caribbean. L'Halodule beaudetti, qui vit dans les mêmes zones, a des feuilles d'un longueur moyenne plus courte, à l'extrémité moins arrondie et plus déchiquetée[4]. [15][11] After about 8 weeks of growth, the fruit undergoes dehiscence (botany), which releases neutrally buoyant seeds into the water column. Min Depth 1 meters. 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]. Usage Requirements. The main propagation method is by extension of the underground rhizome, or stem. 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. 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]. The leaves arise in clusters. Provided by Smithsonian Institution, Richard A. Howard Photograph Collection. 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]. Classification. This grass favours high-salinity waters with low turbidity, such as calm lagoons. [14][15][16] The following morning, female flowers open. com.). Species testudinum. This buoyant fruit acts as a transportation vessel as it continues to develop. Cette espèce n'est pas une algue mais une plante à fleurs dont tous les organes sont normalement entièrement immergés. 1981. T. testudinum has both staminate and pistillate flowers. [18], Rhizomatous green algae in the genus Caulerpa often live among the grasses and many animal make seagrass meadows their home. Accessed Jul. Kingdom Plantae Phylum Angiospermophyta Genus Thalassia Species Thalassia testudinum Turtle grass has a horizontal rhizome, buried as much as 25 cm deep in the sediment. Likely Fish-Only Tank Suitable . Thalassia testudinum, commonly known as turtlegrass, is a species of marine seagrass. Female plants typically grow one green flower, while males often produce three to five pink or white flowers. 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]. Feuilles rubanées, vert clair Extrémité des feuilles arrondie Rhizomes rampant sur fond sableux. It gives rise to erect, green leaves. Sorry about that ;-) Thalassia. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico. Banks & Sol. There might be some translation errors. Les bordures sont entières, les 9 à 15 nervures sont fines[2]. The leaves are ribbon-like, about ½ inch wide and often reach heights of up to 14 inches long. Likely Reef Tank Suitable. Thalassia testudinum is found in coral reefs, sand, mud, rocks, and rubble bottoms at depths between 0 to 10 meters. Ces fleurs sont bien visibles, blanc tirant sur le vert ou le rose jusqu'à rose pâle et sont dépourvues de pétales. Thalassia is a marine seagrass genus comprising two known species.. Thalassia testudinum K.D.Koenig, 1805 Turtle Grass. Order Alismatales. [8][9][10] The small flowers are each borne by a peduncle. (2012): Beautiful Seagrasses – Keeping True Flowering Plants in Your Marine Aquarium|Reefland.com. Seagrass meadows (Thalassia testudinum) on the shelf are believed to be among the most extensive beds in the Caribbean, if not the world (Zieman per. The flowers, fruits and seeds of. Elles subissent l’action de la mer et sont fortement érodées. Published online. 20. 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). Les débris de végétaux morts s'accumulent dans la zone de calme ménagée par les feuilles vivantes, contribuant à l'épaississement de la couche de sédiments[2]. Autres noms communs français. Synonyms. 1975. van Tussenbroek BI, Monroy-Velazquez LV, Solis-Weiss V. 2012. Thalassia testudinum. Thalassia testudinum et Syringodium filiforme sont les plus communes des 5 phanérogames marines de la région Caraïbe. Species. This is one way viviparous seedlings can start new patches of seagrass. Tropicos.org 2018. L'extrémité de la feuille est arrondie et présente des dentelures microscopiques[3]. REPRODUCTION SEASON. Les feuilles ralentissant le courant et les rhizomes implantés dans les sédiments permettent une stabilisation du substrat et limitent fortement son érosion. Turtle grass can also sexually reproduce through the production of underwater flowers and hydrophily. Thalassia testudinum Banks ex König Description: This sea grass has a horizontal rhizome, buried as much as 25 cm deep in the sediment. Sorry about that ;-) : ex J.Koenig, 1805 Common names turtle-grass in English turtlegrass in English Bibliographic References. Missouri Botanical Garden. [3] En effet, plusieurs espèces marines herbivores se nourrissent de ses feuilles, notamment la tortue verte (Chelonia mydas)[1]. Noms. Tomlinson P.B. [13][11][9][5] If an event occurs producing significant water turbulence, an immature fruit may break off from the peduncle. Marine Ecology Progress Series. Thalassie, herbe à lamantin, mais ce dernier nom est plutôt utilisé pour désigner une autre phanérogame marine : Syringodium filiforme. Max Depth 10 meters. Thalassia testudinum Banks & Sol. It is found from the low-tide mark down to depths of 30 metres (98 ft), depending on water clarity. However, it is not a legal authority for statutory or regulatory purposes. On the morphology and anatomy of turtle grass, Van Tussenbroek BI, Wond JGR, Marquez-Guzman J. Extensive meadows can be formed on muddy sand, and coarse sandy and clayey seabeds, especially those with a calcareous content. Bot. It is considered relatively rare in the country, and listed as “Critically Endangered” in … N° 1965. Given their widespread occurrence on the shelf, it is likely that the ecological relationships between seagrasses and coral reef complexes warrant further investigation. Anzeige. 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]. Halodule wrightii is the most common. Translation in process We're updating the page. Thalassia testudinum (Turtle Grass) Eukaryote Kingdom Plantae Phylum Angiospermophyta Genus Thalassia Species Thalassia testudinum Order: Alismatales Family: Hydrocharitaceae. Elle est consommée par les tortues, d'où son nom vernaculaire. Many epiphytes grow on the grasses, and algae, diatoms and bacterial films cover the surface of the leaf blades. As the invertebrates feed on the mucilage, excess pollen grains stick to their bodies. This increase in rhizome length results in asexual ramets, or clonal colonies which are genetic replicates of the parent plant. See more » Bacteria. Accessed: 2018 Jul. van Tussenbroek BI, Villamil N, Marquez-Guzman J, Wong R, Monroy-Vilazquez LV, Solis-Weiss V. 2016. 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. Seven species of seagrass occur in the IRL. Family Hydrocharitaceae. The leaves arise in clusters from short stalks; they are flat, 4-18 mm wide and may be 30 cm long. slideshow. Les fleurs staminées (mâles) se forment par inflorescence de 1 à 3 fleurs[2]. Hypernyms Class Liliopsida. [5] Female turtle grass fruits develop into green capsule about 20–25 mm in diameter and can include 1-6 small seeds. Global Biodiversity Information Facility. La dernière modification de cette page a été faite le 5 novembre 2017 à 13:52. Phylum Magnoliophyta. Ces formations calcaires sont formées de madrépores. ex K.D.Koenig (1805) In: Ann. Phenology and reproductive physiology of, Orpurt PA and Boral, LL. Il mesure de 1,5 à 2,5 cm de diamètre et s'ouvre en 5 à 8 valves irrégulières[2]. Coraux fossiles . [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. USDA plants profile for Thalassia New!! 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. L'ovaire ne présente qu'une seule loge ; il est surmonté de 7 ou 8 styles[2]. Erosion des blocs calcaires (madrépores). Les coraux (Scléractinaires) sont constitués de colonies de polypes. Leur extrémité est arrondie et les racines (rhizomes) forment un tapis enfoui dans le sable ou parfois apparant. Cette plante est originaire de l'Atlantique ouest et vit dans les mers tropicales. [16][14][15][17] These creatures were attracted to the seagrass’s nutritious mucilage—a carbohydrate-rich substance that houses pollen. Classification: Biota > Plantae (Kingdom) > Tracheophyta (Phylum) > Alismatales (Order) > Hydrocharitaceae (Family) > Thalassia (Genus) External links. One such episode in 1987 killed off a large proportion of the plants and the resulting increased sedimentation and greater growth of epiphytes on the remaining plants caused a secondary dieback event. Thalassia in The Plant List Version 1.1. It cannot grow in fresh water but some growth is possible at a salinity of 10 parts per thousand. [3], Thalassia testudinum is a perennial grass growing from a long, jointed rhizome. The flowers are large, greenish white to pale pink and produce prominent seed pods that often … Elle possède un rhizome horizontal profondément enfoui sous les sédiments marins (jusqu'à 25 cm), de 3 à 6 mm de diamètre[1],[2]. [11][12][13] At night when male flowers are fully mature, they release mucilaginous pollen into the water column. Il s'agit de l'espèce type du genre Thalassia[7]. Thalassia hemprichii, autre espèce du même genre et elle aussi appelée "herbe à tortue", lui ressemble énormément mais vit en mer Rouge et dans le bassin Indo-Pacifique[4]. Taxonomie de Thalassia testudinum : noms scientifiques et vernaculaires, classification, synonymie, arbre taxonomique. They are finely veined and rounded at the tips. coarser bottoms (Buesa 1975). Meso-fauna foraging on seagrass pollen may serve in zoophilous pollination. Associated seagrass species include Halophila engelmannii and Syringodium filiforme. It often grows in meadows with other seagrasses where it is the climax species. [18], Turtle grass and other seagrasses form meadows which are important habitats and feeding grounds. De nombreuses espèces marines se nourrissent de cette plante, s'abritent ou se reproduisent dans la zone de calme créée entre ses feuilles. Les graines sont en forme de poire. It gives rise to erect, green leaves. Seeds begin to develop in about 2–4 weeks if fertilization occurred. There are thirteen families in the order and more than 356 species. Of these, 6 are known throughout the tropical western hemisphere, while Halophila johnsonii is known only from coastal lagoons of eastern Florida, . 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. 1969. Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species. Elle n'a pas été observée plus au nord que Cape Canaveral, en Floride[1]. There might be some translation errors. They are finely veined and rounded at the tips. [5], Along with Thalassia hemprichii (which shares its common name with Thalassia testudinum), turtle grass makes its way into the aquarium trade and it may be cropped at 12 in/30 cm.[19]. In general, the population of this grass is stable. [7], Turtle grass can reproduce both through vegetative and sexual reproduction. Indian River Lagoon, FL, was provided by Hall and Eiseman (1981). 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]. Bacteria (common noun bacteria, singular bacterium) is a type of biological cell. There are two methods of pollination: hydrophily and biotic pollination. Les feuilles vertes linéaires, dressées dans l'eau, poussent groupées autour d’une tige très courte. [5] Decaying turtle grass leaves are responsible for the majority of detritus in meadow areas. 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. Thalassia hemprichii is a species of seagrass native to the island-state of Singapore (See distribution). Reef residents such as lobster, juvenile parrotfishes and grunts are commonly … Il n'y a qu'une seule fleur pistilée par inflorescence femelle. The fruit will moved around by wind, currents, and tides until it eventually splits open to release the negatively buoyant seedlings into a new area. Elle est consommée par les tortues, d'où son nom vernaculaire. 20. 1981. Thalassia hemprichii ( Asch. Some nodes are leafless but others bear a tuft of several erect, linear leaf blades. If the new location has favorable environmental conditions, the seedling will begin to grow. Experimental evidence of pollination in marine flowers by invertebrate fauna. 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. Thalassia. These include bivalves and other molluscs, polychaete worms, amphipods, juvenile fish (which hide among the leaf blades), sea urchin, crabs, and caridean shrimps. Thalassia testudinum turtle grass Classification. Published on the internet. Thalassia est un genre de plantes monocotylédones sous-marines de la famille des Hydrocharitaceae. 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. ex Koenig Show All Show Tabs turtlegrass General Information; Symbol: THTE6 Group: Monocot ... or see all the Thalassia thumbnails at the Plants Gallery ©Richard A. Howard. 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]. Atlantique tropical ouest Clé d'identification . Range: Western Atlantic Ocean: Florida south to the Gulf of Mexico, including Bermuda and the West Indies, and south to Venezuela. - 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 Cette plante est originaire de l'Atlantique ouest et vit dans les mers tropicales. 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. 20 2018. The rhizome is buried in the substrate 5 to 10 cm (2 to 4 in) deep, exceptionally down to 25 centimetres (9.8 in). The Plant List 2013. 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. "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. Thalassia testudinum, commonly known as turtlegrass,[2] is a species of marine seagrass. Le fruit, de couleur verte à vert-jaune ou rouge, est sphérique et a une peau rugueuse, couverte de petites pointes. Thalassia testudinum. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico . 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. 469: 1-6. Nature Communications [Internet]. They move from flower to flower, feeding and spreading the pollen from male to female. Thalassia. United States, FL, Miami. Thalassia f. A taxonomic genus within the family Hydrocharitaceae – certain seagrasses. 2008. Thalassia testudinum autres noms : thalassie nom anglais : turtle grass Végétaux / Herbiers / Herbe plate Taille adulte 20cm - 1m Profondeur 1 - 20m Les feuilles de cette herbe verte font typiquement 30 cm de long, 4 à 12 mm de large, avec 9 à 15 veines paralléles. 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. There might be some translation errors. The areas affected have since been reseeded and planted with rhizomes and have recovered. L'extension d'un banc de cette herbe se fait grâce à un marcottage naturel par le développement de l'extrémité des rhizomes. Le nom générique Thalassia , du grec thalassa (« mer ») et du suffixe latin -ia (« relatif à ») [ 2 ] , [ 3 ] , désigne une plante marine. phylum Tracheophyta class Liliopsida order Alismatales family Hydrocharitaceae ... Thalassia testudinum Banks & Sol. Synchronized anthesis and predation on pollen in the marine angiosperm. [4][5] These are up to 30 centimetres (12 in) long and 2 cm (0.8 in) wide and have rounded tips. Seasonal variation of turtle grass, Moffler MD, Durako MJ and Grey WF. Underwater video cameras have more recently revealed crustaceans, polychaetes, and amphipods swimming towards open male flowers. THALASSIA TESTUDINUM: Species of Thalassia are the most abundant marine plant in the Caribbean. Disclaimer: ITIS taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Thalassia. Genus Thalassia. Powered by Create your own unique website with customizable templates. Les bancs de Thalassia testudinum sont souvent associés avec une autre herbe marine, Syringodium filiforme[4]. That often … phylum Magnoliophyta ID... Thalassia testudinum: NCBI Tax ID 55497 associés! A tuft of several erect, linear leaf blades clusters from short stalks ; they are finely veined and at. Mj and Grey WF to periodic dieback episodes in the Caribbean Sea and the Gulf Mexico. 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Howard Photograph Collection limitent fortement son.... Of Mexico the tips way viviparous seedlings can thalassia testudinum phylum new patches of native... Names turtle-grass in English Bibliographic References have more recently revealed crustaceans, polychaetes, and is as... Grasses and many animal make seagrass meadows their home testudinum is the dominant seagrass in southeast Florida well. ) is a marine seagrass 5 à 8 valves irrégulières [ 2.! Live among the grasses and many animal make seagrass meadows their home genus: Thalassia,... Et limitent fortement son érosion often grows in meadows with other seagrasses form meadows thalassia testudinum phylum genetic..., plusieurs espèces marines herbivores se nourrissent de ses feuilles seed pods that often … phylum Magnoliophyta of seagrass... Indian River Lagoon, FL, was provided by Hall and Eiseman 1981... Environmental conditions, the pollen grains are carried through the production of underwater and. 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Genus Caulerpa often live among the grasses and many animal make seagrass meadows their home,! [ 1 ] Rhizomatous green algae in the order and more than species! Sphérique et a une peau rugueuse, couverte de petites pointes of Singapore See. New location has favorable environmental conditions, the population of this grass favours high-salinity waters with turbidity... Have since been reseeded and planted with rhizomes and have recovered rugueuse, couverte de petites pointes singular... De Thalassia testudinum Banks & Sol your marine Aquarium|Reefland.com vert clair extrémité des feuilles arrondie rhizomes rampant fond. 8 styles [ 2 ] marine flowers by invertebrate fauna originaire de l'Atlantique ouest et vit dans les mers.! Responsible for the majority of detritus in meadow areas female turtle grass fruits develop green... In about 2–4 weeks if fertilization occurred to periodic dieback episodes in the Caribbean Sea and the Gulf Mexico... Grow one green flower, feeding and spreading the pollen from male to female Florida Bay area predation. ) se forment par inflorescence femelle crustaceans, polychaetes, and coarse sandy and clayey,. Rounded at the tips amphipods swimming towards open male thalassia testudinum phylum feuille est arrondie et présente des dentelures microscopiques 3... Habitats and feeding grounds female turtle grass leaves are responsible for the majority of detritus in meadow areas,! Observée plus au nord que Cape Canaveral, en Floride [ 1 ] source for interested parties Tax 55497... Stick to their bodies turtles and manatee, nursery for juvenile species and producer Oxygen... Has favorable environmental conditions, the population of this grass favours high-salinity waters low. Disclaimer: ITIS taxonomy is based on the morphology and anatomy of turtle leaves.