It is a small herbaceous plant that occurs in sea beds and other saltwater environments in the indopacific the first description of the species was by robert brown as caulinia ovalis, this was transferred to the genus halophila by joseph dalton hooker in flora tasmaniae. Our study was conducted during low tide in december 2008. This causes negative impacts on many marine organisms and thus affecting the ecosystem. The relationship of genetic differentiation and geographic barriers. Antibacterial activity of three south indian seagrasses, cymodocea. Annaletchumy and others published morphology of halophila ovalis r. The distribution, biomass and primary production of the. Seagrasses are nutraceutical in nature and therefore of importance as food supplements. Halophila ovalis in the tropical atlantic ocean frederick t. The website also provides access to a database and images of herbarium specimens found at the university of south florida and other herbaria. In the analyses, trees were tested by the bootstrapping method with 1,000 replications. Halophila ovalis and its closelyrelated species belonging to the hydrocharitaceae are wellknown as a complex taxonomic. Long distance dispersal potential of two seagrasses. Growth and biomass production of leaf seagrass halophila ovalis, syringodium isoetifolium and halodule uninervis on seagrass ecosystems in lompo barrang island waters.
Jul 03, 2018 download fsc part 2 pak studies urdu short question answer notes. New record of the seagrass species halophila major core. It grows rapidly with leaf pairs emerging from the rhizome and is considered. Halophila ovalis internode length was found to increase during the latemonsoon each year at reef habitats in the dry tropics. Halophila ovalis was investigated in four seagrass beds, i. This study was done with controlled experiments, using co2enrichment as a simulation of ocean acidification.
Pdf antibacterial activity of three south indian seagrasses. This article is from bmc evolutionary biology, volume 14. Ocean acidification is one of the biggest challenges happening in the marine environment and causes a shift in dissolved inorganic carbon dic concentrations and lowers the seawater ph. Xu nn, jiang k, biswas sr, tong x, wang r and chen xy 2019 clone configuration and spatial genetic structure of two halophila ovalis populations with contrasting internode lengths. Provides authoritative information on the flora of western australia. Anthropogenic disturbance due to deployment of boat anchors and loss of seagrass ecosystem is not well understood in india. Portion of branch, with leaves removed, showing young male and female flowers. Air lacunae differentiate schizogenously close to the apex, where they are first occluded by material which stains heavily with toluidine blue, but some appear empty within 300. This seagrass is among the favourite food of dugongs so it is also sometimes called dugong grass. Shading responses of the seagrass, halophila ovalis. The number of its contained species, and its own placement in the order alismatales, has evolved.
Halophila ovalis plants responses under laboratory condition. Plants magnoliophyta liliopsida alismatales hydrocharitaceae juss. Mar 30, 2017 halophila ovalis is a colonising seagrass species in tropical and temperate marine habitats throughout australia 82. Antinociceptive and antiinflammatory activities of. An assessment on habitat, environment and morphological characteristics of halophila ovalis are described for the 11 locations. Halophila decipiens was used as outgroup, because it is closer to its ancestor than the halophila ovalis complex. The plants grow from a single rhizome and prefer shallow, calm protected habitats but can be found as deep as 80 feet. Halophila ovalis is a colonising seagrass species in tropical and temperate marine habitats throughout australia 82. Halophila is a genus of seagrasses in the family hydrocharitaceae, the tapegrasses. Halophila ovalis showed the maximum percentage of showed protection percentage of culex quinquefasciatus mosquito protection 95 and protection time 4. Long distance dispersal potential of two seagrasses thalassia. Leaf nutrient resorption, leaf lifespan and the retention of nutrients in. Recent morphological and molecular studies by uchimura et al.
Title distribution and biomass of halophila ovalis r. Brief description grazyna paczkowska, tuesday 9 august 1994. Stone hartog classification click on a scientific name below to expand it in the plants classification report. The indopacific region has the largest number of seagrass species worldwide and this region is considered as the origin of the hydrocharitaceae. Find, read and cite all the research you need on researchgate. Antimicrobial potential of endophytic fungi derived from. Halophila decipiens is the only tropical circumglobal seagrass, living subtidally at approximately 6.
Portion of fertile plant with glabrous leaves from mallacoota inlet, victoria. Relationships between seagrass biodiversity and infaunal. The ecophysiological effects of co2 enrichment on the. Antibacterial activity of three south indian seagrasses. Antinociceptive and antiinflammatory activities of sargassum. This effect was examined on the seagrass halophila ovalis r. In the hot plate test, the antinociceptive effect was observed only in. Antibacterial potential of three seagrasses against human. Primary production of deepwater halophila ovalis meadows.
The atlas of florida plants provides a source of information for the distribution of plants within the state and taxonomic information. Halophila ovalis is a dioecious seagrass with a wide geographical and water depth. Halophila ovalis occupies about 20% 461 ha of the swancanning estuary. Studies suggest that halophila ovalis can recover rapidly from grazing by dugong.
Nutrient requirements of in vitro cultured halophila ovalis. Pdf first record of halophila ovalis in the haripur creek, east coast. Halophila ovalis and its closelyrelated species belonging to the hydrocharitaceae are wellknown as a complex taxonomic challenge mainly due to their high morphological plasticity. Halophila ovalis plants were collected from seagrass meadow of punang sari 04 57. Halophila ovalis in the tropical atlantic ocean sciencedirect. Among various tropical seagrass species, halophila ovalis is known to be preferred by dugongs dugong dugon preen 1995. Halophila ovalis has very limited capacity to disperse by sea, as indicated by the short duration of various life history stages that remain floating and alive.
Hooke hydrocharitaceae methanol extract were investigated and. The size of halophila ovalis shoots decreased by 30% when both t. Endophytic fungi from three commonly found seagrasses in southern thailand were explored for their ability to produce antimicrobial metabolites. Other recent papers using molecular techniques have also failed to clearly differentiate the species.
The distribution of tropical seagrasses with relation to their tolerance. However, the effect of increasing co2 concentration dissolved in the ocean can potentially be beneficial to the growth of. Halophila ovalis is a beautiful species of sea grass native to asia and the south pacific. The antibacterial, antioxidant, and antiinflammatory activities of halophila ovalis r. Nutrient cycling associated with the seagrass halophila. All structured data from the file and property namespaces is available under the creative commons cc0 license. It is commonly referred to a spoon grass or paddle weed. In the formalin test, swsp and hosp significantly reduced licking time in both phases of the test at a dose of 10 mgkg. Nutrient requirements of in vitro cultured halophila. All phylogenetic trees achieved from analysis were analyzed and exactly constructed by the tree of trees approach. Genetic species identification and population structure of. Text is available under the creative commons attributionsharealike license. Materials and methods the study site, pulau gazumbo, 5.
The university of minnesota is an equal opportunity educator and employer. Peyton c a department of natural resources and the environment, university of new hampshire, jackson estuarine laboratory, 85 adams point road, durham, nh 03824, usa. Abstract the present study investigated the effects of sulfated polysaccharides from brown seaweed sargassum wightii swsp and seagrass halophila ovalis hosp in nociceptive and inflammatory models. Rhizomatous, dioecious, submerged, marine or estuarine perennial, herb.
Halophila ovalis is a seagrass in the family hydrocharitaceae, a common name is paddle weed. Electronic flora of south australia species fact sheet. Halophila ovalis, state herbarium of south australia. Habitat and morphological characteristics of halophila. Halophila ovalis in the tropical atlantic ocean request pdf. The species is has been recorded in unconsolidated sediments across the eastern gulf of mexico the west florida shelf, distributed widely and attaining highest densities in this geographic region.
Temporal and spatial morphological variability of the. Plants profile for halophila hawaiiana hawaii seagrass. Effects of water depth on clonal characteristics and. The antibacterial properties of the three seagrasses namely cymodocea serrulata, halophila ovalis and zostera capensis were tested against the human pathogens staphylococcus aureus, bacillus cereus, b. Habit of fertile plant with hairy leaves from northern territory. This paper describes the biomass, distribution and primary production of this plant in relation to environmental factors. Axenic cultures of posidonia coriacea and halophila ovalis were established to investigate the effect of nitrogen addition and the optimum concentration of ms murashige and skoog physiol plant 15. Seagrasses are a functional group, not a taxonomic group, of angiosperms flowering plants, i. To assess the role of this plant in the biogeochemical cycling of the estuary, its biomass, nutrient dynamics and oxygen rele. The seagrass, halophila ovalis was grown in culture to investigate its responses to artificial shading. Herbarium images are portable document files pdf and require acrobat reader for.
Seagrass halophila ovalis is affected by light quality. Request pdf halophila ovalis in the tropical atlantic ocean a species of seagrass in the genus halophila was found growing in a shallow lagoon on the west shore of antigua in the caribbean. It grows rapidly with leaf pairs emerging from the. In addition, the samples had no genetic deviation using nrdna sequences from halophila johnsonii. The plant occurs around reefs, estuaries, islands, intertidal areas, on soft sand or mud substrates.
Halophila ovalis, which occurs in an extensive monospecific bed for future potential refuge for various kinds of marine organisms. Pdf primary production of deepwater halophila ovalis. Genetic analysis showed the plants were halophila ovalis. If the address matches an existing account you will receive an email with instructions to reset your password. Yusof1, juliana mohamed1, tan shau hwai1, zulfigar yasin1 and anisah lee abdullah2 1marine science lab, school of biological sciences, universiti sains malaysia, 11800 minden, penang, malaysia. Within halodule, narrowleaved plants are more resistant to high temperature stresses than wideleaved plants, and within the halophila ovalis r. One hundred and sixty endophytic fungi derived from cymodocea serrulata family cymodoceaceae, halophila ovalis and thalassia hemprichii family hydrocharitaceae were screened for production of antimicrobial compounds by a colorimetric broth. Hydrocharitaceae of north america update, database version 2010 acquired. Download fsc part 2 pak studies urdu short question answer notes. So, we used govind nagar beach of havelock island of andaman and nicobar islands anito assess the impacts of boat anchors from traditional fishing and recreational activities on the seagrass halophila ovalis population structure. The indopacific region has the largest number of seagrass species worldwide and. There continues some debate in the literature and between seagrass taxonomists on the details particularly below sub class on the correct classification. Herbarium images are portable document files pdf and require acrobat reader for viewing.
Physicochemical habitability conditions for the genus. The number of its contained species, and its own placement in the order alismatales, has evolved it is widespread in tropical waters, the distribution range also extends to subtropical and temperate waters primarily the indian and pacific oceans but also the mediterranean. An experimental test of the occurrence of competitive interactions. It is a small herbaceous plant that occurs in sea beds and other saltwater environments in the indopacific. The roots of halophila ovalis are sheathed by root cap cells up to 2 mm above the meristem tip, and carry prominent root hairs. Field observations were conducted to investigate the effects of physicochemical conditions on the distribution of the genus halophila in subtropical nakagusuku bay okinawa, japan.
Halophila ovalis, water depth gradient, rhizome, shoot, biomass allocation, seagrass. There continues some debate in the literature and between seagrass taxonomists on the details particularly below sub. Halophila ovalis occupied 550600 ha in the lower reaches of the estuary, approximately 20% of the area of the main estuarine basin. Media in category halophila ovalis the following 2 files are in this category, out of 2 total. Root development in the seagrass halophila ovalis r. Frontiers clone configuration and spatial genetic structure. The seagrass leaf provides a surface for small algae to grow on. Jul 02, 2014 this page was last edited on 9 july 2018, at 06. It is a small herbaceous plant that occurs in sea beds and other saltwater environments. Halophila ovalis, commonly known as paddle weed, spoon grass or dugong grass, is a seagrass in the family hydrocharitaceae. Files are available under licenses specified on their description page. Halophila ovalis grew in variable habitats encompassing intertidal degraded coral reef platform teluk kemang, subtidal shoal merambong, tanjung adang laut, tanjung adang darat of johore, offshore island pulau tinggi, intertidal lagoon merchang. Updated by the flora of north america expertise network, in connection with an update for usda plants 20072010 reference for. Shade screens providing 1015 percent of incident light.
Spoon seagrasses halophila ovalis on the shores of singapore. Data in a recent paper by short, moore, and peyton 2010 indicate that h. Live plant portions were transplanted indoors providing natural sunlight, substrate and seawater. Effects of water depth on clonal characteristics and biomass.