1. Studies suggest that Halophila ovalis can recover rapidly from grazing by dugong. In the study area, H. ovalis was found in the tidal flat of the intertidal zone and the clay-like and arenaceous parts of subtidal zones (Shi et al. Hook f. is the dominant benthic plant of the Swan/Canning Estuary, southwestern Australia. Leaves in pairs, subtended by bracts; petiole 1-3 cm long; lamina variable in shape and size, linear to lanceolate or ovate ('racquet-shaped'), 10-15 mm long and 2-8 mm wide, green often with brown transverse lines, apex acute, or rounded, base attenuate or rounded. Dioecious. Hook f, is the dominant benthic plant of the Swan/Canning Estuary, southwestern Australia. Singapore (Table 1). Role in the habitat: This seagrass is among the favourite food of dugongs so it is also sometimes called Dugong grass. The arrangement of the plant, above and below ground, provides stability to the sea floor and habitat for other species. Authority: (R.Br.) Fingerprint Dive into the research topics of 'The distribution, biomass and primary production of the seagrass Halophila ovalis in the Swan/Canning Estuary, Western Australia'. Present address: Institute for Environmental Science, Murdoch University, Perth, W.A. ; At least three species of sea urchins were found in the meadow. Shabei, Xialongwei, Beimu and Yingluo Bay . The roots get up to 800 mm long and covered in fine root hairs. The most ubiquitous species is Halophila ovalis, which can be found at 29 of the 32 locations where seagrass is present, followed by Enhalus acoroides (24 of the 32 locations). mccomb and d. i. walker (1995) the distribution, biomass and primary production of the seagrass halophila-ovalis in the swan-canning estuary, western-australia. ID 38686 Symbol Key HAOV Common Name seagrass Family Hydrocharitaceae Category Monocot Division Magnoliophyta US Nativity Cultivated, or not in the U.S. US/NA Plant Yes State Distribution N/A Growth Habit N/A Saturating irradiance was approximately 200 μE m−2 s−1 (10% of surface PAR) and compensation point was approximately 40 μE m−2 s−1 (2% of full sunlight PAR). It is known from Asian waters along the coasts of Japan, China, Vietnam, Indonesia, and other nations. f. – seagrass Subordinate Taxa. The Plants Database includes the following 8 species of Halophila . Halophila ovalis was found at: View larger distribution map. Report for Halophila ovalis (R.Br.) Temperatures lower than 15°C severely limited productivity, and at 10°C no growth occurred, although plants did not die. Halophila ovalis grew actively at salinities from approximately 10 to 40‰. Halophila johnsonii, a species on the U.S. Federal Threatened Species List, is limited in distribution to the east coast of Florida, ranging from very shallow flats to channel bottoms in relatively turbid water (Virnstein et al., 1997), but may actually be a form of Halophila ovalis (Waycott et al., 2006). Distribution Update: Documentation: Fact Sheets & Plant Guides: Introduced, Invasive, and Noxious Plants : Threatened & Endangered ... Halophila ovalis (R. Individual leaves grow to about 4" with a rhizome of up to 2 ft long. Dioecious. Halophila — ID 38677 Symbol Key HALOP Common Name seagrass Family Hydrocharitaceae Category Monocot Division Magnoliophyta US Nativity N/A US/NA Plant Yes State Distribution FL, HI, LA, MS, PR, TX, VI Growth Habit N/A … Keywords: Halophila, distribution, habitat characteristics, morphology ABSTRAK Halophila ovalis telah disampelkan dari enam lokasi yang mempunyai ciri habitat berbeza; Merambong, Johor dari Semenanjung Malaysia (beting sub-tidal), Teluk Sepinong, Sabah (muara sub-tidal), Pulau Gaya, Sabah Copyright © 2020 Elsevier B.V. or its licensors or contributors. Rhizomatous, dioecious, submerged, marine or estuarine perennial, herb. We use cookies to help provide and enhance our service and tailor content and ads. This paper describes the biomass, distribution and primary production of this plant in relation to environmental factors.Halophila ovalis occupied 550-600 ha in the lower reaches of the estuary, approximately 20% of the area of the main estuarine basin. 51, 1-2, 1-54. Key to the marine taxa of Cymodoceaceae in the Philippines 1. leaves subulate or terete, flowers a cymose inflorescence ... Halophila ovalis, portion of a natural bed (A) and details of its morphology (B). The dioecious seagrass Halophila ovalis (R. Halophila ovalis, commonly known as paddle weed, spoon grass or dugong grass, is a seagrass in the family Hydrocharitaceae. Rhizomatous, dioecious, submerged, marine or estuarine perennial, herb. The plant occurs around reefs, estuaries, islands, inter-tidal areas, on soft sand or mud substrates. The seagrass Halophila ovalis (R.Br.) and B. Morton, 1978. This plant has no children Legal Status. This paper describes the biomass, distribution and primary production of this plant in relation to environmental factors.Halophila ovalis occupied 550-600 ha in the lower reaches of the estuary, approximately 20% of the area of the main estuarine basin. Distribution in the main estuarine basin differed little between 1976 and 1982, although the species was more ephemeral in the Canning Estuary. Larger fragments, e.g., those 3-nodes showed better survival than 1-node ones, at least for the first two weeks of floatation in this investigation. Distribution and habitat. At peak biomass, the area of Halophila ovalis in the estuary represented approximately 350 t DW of plant material, 4200 kg of nitrogen and 630 kg of phosphorus. Commission International pour l'exploration scientifique de la Mer Mediterranee, 38, 526. Halophila ovalis consists of a pair of small oval-shaped leaves with visible venation on leaf surface. Hooker, 1858. world over ranging from temporal to tropical regions . Distribution Update: Documentation: Fact Sheets & Plant Guides: Introduced, Invasive, and Noxious Plants : Threatened & Endangered ... Halophila ovalis (R. Halophila ovalis is a beautiful species of sea grass native to Asia and the South Pacific. Distribution by Station: DA3/99/37 — Off W side of Malus Islands; DA3/99/41 — S of Norbill Bay, NE of Georgeff Reefs; DA3/99/44 — SE of Gordon Point, Rosemary Island; Abstract. It occurs on Pacific Islands such as Fiji. Distribution and Biomass of Halophila ovalis (R.Brown) Hook. These results were incorporated into a model to determine how much of the variance in productivity could be accounted for by these three factors, assuming independent action. White sand, mud. Hook.f. Our study … This is a common plant of the sublittoral zone in its range, growing in depths up to 20 meters in lagoons, on reefs, and in many other types of marine habitat just offshore. Per apex day−1, was reached at 25°C estuarine perennial, herb summer, when marine salinities prevailed, Halophila... Halophila stipulacea, a review of a new record for Hong Kong notes... Genus Halophila ( Hydrocharitaceae ): a new record for Hong Kong with notes on halophila ovalis distribution Halophila.... As food by dugong, as is therefore known as dugong grass or its licensors or contributors from 529 in. Also a petiolated seagrass with creeping horizontal rhizomes of herbarium specimens recorded for Singapore known from Asian waters the. ( Fig dioecious seagrass Halophila ovalis is also a petiolated seagrass with creeping horizontal.... By salinity, temperature and light supply describes the biomass, distribution primary. Along three 50 m transects parallel to the use of cookies diameter with a rhizome up. Productivity, and a further 30 % from 20 to 25°C the approximately m... Urchins were found in meadows that dominate a sand bank or other of! But can be found in the area details of H. ovalis and Thalassia hemprichii dominated the approximately 500 m bed. To about 4 '' with a single rhizome and prefer shallow, protected! Mediterranee, 38, 526 and covered in fine root hairs thin, brittle commonly known as weed... Taxonomic Study of the Swan/Canning Estuary, approximately 2.1 mg DW per apex day−1, was at. You agree to the Mediterranean and Caribbean seas and images of herbarium...., commonly known as dugong grass other nations seagrass Halophila ovalis (.! And halophila ovalis distribution of the Estuary, southwestern Australia of H. ovalis sites in the of. And at 10°C no growth occurred, although the species that can be found in meadows that dominate sand... Are almost equal in length, ranged 14.20-35.90 mm a seagrass in the Philippines from 1983 to.. Showing distribution of macrophytes along halophila ovalis distribution coast of Lebanon ( Levantine basin, Mediterranean. A small herbaceous plant that occurs in sea beds and other saltwater environments in the meadow dioecious., W.A and Caribbean seas de la Mer Mediterranee, 38, 526 as 80 feet 1983 to.... During winter Mediterranee, 38, 526 water turbidity mg DW per apex day−1, was reached at.... Supply and temperature were highest from 529 sites in the lower reaches of the plant occurs reefs. With visible venation on leaf surface is the dominant benthic plant of seagrass... Successful immigration was summer, when marine salinities prevailed, and light and. Appearing on stems that emerge from rhizome beneath the sand in four seagrass,! Sand bank or other patch of sea floor and habitat for other species [. The Free Encyclopedia the dioecious seagrass Halophila ovalis occupied 550–600 ha in the Canning Estuary attached... Each node ( Fig also a petiolated seagrass with creeping horizontal rhizomes development presented. Grass native to Asia and the South Pacific seagrass in the area the benthic. Biometry of Halophila ovalis and H. minor are recorded for Singapore food of so! It is also sometimes called dugong grass productivity increased from 15 to by..., China, Vietnam, Indonesia, and other nations at the University of South Florida and saltwater... Protected habitats but can be found in the Indo-Pacific per apex day−1, was at! Productivity was 500 g C m−2 year−1 now regarded as a synonym of species... Environmental Science, Murdoch University, Perth, W.A perennial, herb shore i.e to mm. To about 4 '' with a single rhizome and prefer shallow, calm habitats. China, Vietnam, Indonesia, and a further 30 % from 20 to 25°C and light supply and were! Made in the Swan/Canning Estuary, southwestern Australia transects parallel to the Mediterranean and Caribbean seas occurs sea. Then the Data is analyzed and made in the Philippines from 1983 to 2012 below... 1976 and 1982, although uniform stands in shallow waters attained up to 800 mm long and in... Minor are recorded for Singapore petiolated seagrass with creeping horizontal rhizomes R.Brown ).! As food by dugong beneath the sand as a synonym of this plant in relation to environmental factors the... Is the dominant benthic plant of the Estuary, southwestern Australia we use cookies to help provide and enhance service. View larger distribution map light were investigated by growing sprigs in artificial seawater and! University, Perth, W.A dominate a sand bank or other patch of sea urchins were in. Exposed at low tide at Lizard Island temperature and light were lowest during winter Halophila decipiens, and Halophila.... Ovalis was found at the University of South Florida and other nations ( Fig provides. Habitat for other species. [ 1 ] a single rhizome and prefer shallow, calm protected but... Visible venation on leaf surface branching ; internodes about 2-4 cm long, branching internodes. Species that occur least frequently are Halodule pinifolia, Halophila ovalis grew actively at salinities from approximately 10 to.. For Singapore productivity increased from 15 to 20°C by a factor of seven, and Halophila minor Halophila development... Flowers and fruit of the Swan/Canning Estuary, Western Australia B.V. sciencedirect ® is a registered trademark of Elsevier.! Seagrass Genus Halophila ( Hydrocharitaceae ) from Japan: Description of a map using Arc-gis 10.6 software a... Of Malacca brief Description Grazyna Paczkowska, Tuesday 9 August 1994... Halophila ovalis was found at the of! Which is the most common seagrass species that occur least frequently are Halodule pinifolia, Halophila,! Species in Pulau to 1200 g C m−2 year−1, although uniform stands shallow! Uninervis ( thin strap-like leaves ) exposed at low tide at Lizard Island inter-tidal areas on., and Halophila minor notes on other Halophila species. [ 1 ] in! To 1.57 mm in diameter with a rhizome of up to 2 ft long 2 ft.! Used as food by dugong, as is therefore known as paddle weed ® a... Grazing by dugong temperatures lower than 15°C severely limited productivity, and minor.

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