Provides authoritative information on the flora of western australia. Antimicrobial potential of endophytic fungi derived from. This causes negative impacts on many marine organisms and thus affecting the ecosystem. Materials and methods the study site, pulau gazumbo, 5. Frontiers clone configuration and spatial genetic structure. Halophila ovalis is a beautiful species of sea grass native to asia and the south pacific. Effects of water depth on clonal characteristics and biomass. Shade screens providing 1015 percent of incident light. Halophila ovalis occupies about 20% 461 ha of the swancanning estuary. 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. Pdf first record of halophila ovalis in the haripur creek, east coast.
Herbarium images are portable document files pdf and require acrobat reader for. New record of the seagrass species halophila major core. This study was done with controlled experiments, using co2enrichment as a simulation of ocean acidification. There continues some debate in the literature and between seagrass taxonomists on the details particularly below sub. Halophila ovalis in the tropical atlantic ocean frederick t. 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. Live plant portions were transplanted indoors providing natural sunlight, substrate and seawater. Halophila ovalis is a colonising seagrass species in tropical and temperate marine habitats throughout australia 82. Mar 30, 2017 halophila ovalis is a colonising seagrass species in tropical and temperate marine habitats throughout australia 82. All structured data from the file and property namespaces is available under the creative commons cc0 license. However, the effect of increasing co2 concentration dissolved in the ocean can potentially be beneficial to the growth of. Seagrasses are a functional group, not a taxonomic group, of angiosperms flowering plants, i. Halophila ovalis occupied 550600 ha in the lower reaches of the estuary, approximately 20% of the area of the main estuarine basin. Shading responses of the seagrass, halophila ovalis.
In the formalin test, swsp and hosp significantly reduced licking time in both phases of the test at a dose of 10 mgkg. Antinociceptive and antiinflammatory activities of. If the address matches an existing account you will receive an email with instructions to reset your password. Relationships between seagrass biodiversity and infaunal. Media in category halophila ovalis the following 2 files are in this category, out of 2 total. Hooke hydrocharitaceae methanol extract were investigated and. Data in a recent paper by short, moore, and peyton 2010 indicate that h.
Hydrocharitaceae of north america update, database version 2010 acquired. This article is from bmc evolutionary biology, volume 14. It grows rapidly with leaf pairs emerging from the rhizome and is considered. Plants magnoliophyta liliopsida alismatales hydrocharitaceae juss. Annaletchumy and others published morphology of halophila ovalis r. Nutrient requirements of in vitro cultured halophila ovalis. 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. Long distance dispersal potential of two seagrasses thalassia. 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. Field observations were conducted to investigate the effects of physicochemical conditions on the distribution of the genus halophila in subtropical nakagusuku bay okinawa, japan. 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. In the analyses, trees were tested by the bootstrapping method with 1,000 replications.
Genetic species identification and population structure of. In addition, the samples had no genetic deviation using nrdna sequences from halophila johnsonii. 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. Halophila ovalis is a dioecious seagrass with a wide geographical and water depth.
Halophila ovalis and its closelyrelated species belonging to the hydrocharitaceae are wellknown as a complex taxonomic. Long distance dispersal potential of two seagrasses. This paper describes the biomass, distribution and primary production of this plant in relation to environmental factors. Leaf nutrient resorption, leaf lifespan and the retention of nutrients in. Within halodule, narrowleaved plants are more resistant to high temperature stresses than wideleaved plants, and within the halophila ovalis r. Halophila ovalis and its closelyrelated species belonging to the hydrocharitaceae are wellknown as a complex taxonomic challenge mainly due to their high morphological plasticity. Physicochemical habitability conditions for the genus. The indopacific region has the largest number of seagrass species worldwide and. Brief description grazyna paczkowska, tuesday 9 august 1994. This effect was examined on the seagrass halophila ovalis r. 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. The number of its contained species, and its own placement in the order alismatales, has evolved. Genetic analysis showed the plants were halophila ovalis.
Antibacterial activity of three south indian seagrasses, cymodocea. Pdf on jan 1, 2005, annaletchumy loganathan and others published morphology of halophila ovalis r. Habitat and morphological characteristics of halophila. Text is available under the creative commons attributionsharealike license. This seagrass is among the favourite food of dugongs so it is also sometimes called dugong grass. Portion of fertile plant with glabrous leaves from mallacoota inlet, victoria. Halophila ovalis, which occurs in an extensive monospecific bed for future potential refuge for various kinds of marine organisms. Antibacterial potential of three seagrasses against human. The size of halophila ovalis shoots decreased by 30% when both t.
Halophila ovalis, commonly known as paddle weed, spoon grass or dugong grass, is a seagrass in the family hydrocharitaceae. The seagrass leaf provides a surface for small algae to grow on. The antibacterial, antioxidant, and antiinflammatory activities of halophila ovalis r. 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. Growth and biomass production of leaf seagrass halophila ovalis, syringodium isoetifolium and halodule uninervis on seagrass ecosystems in lompo barrang island waters. The ecophysiological effects of co2 enrichment on the. It is commonly referred to a spoon grass or paddle weed. 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. Plants profile for halophila hawaiiana hawaii seagrass. Our study was conducted during low tide in december 2008. 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.
Download fsc part 2 pak studies urdu short question answer notes. Halophila ovalis, water depth gradient, rhizome, shoot, biomass allocation, seagrass. Other recent papers using molecular techniques have also failed to clearly differentiate the species. Pdf antibacterial activity of three south indian seagrasses. Anthropogenic disturbance due to deployment of boat anchors and loss of seagrass ecosystem is not well understood in india.
Halophila is a genus of seagrasses in the family hydrocharitaceae, the tapegrasses. 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. Halophila ovalis plants were collected from seagrass meadow of punang sari 04 57. There continues some debate in the literature and between seagrass taxonomists on the details particularly below sub class on the correct classification. 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. Title distribution and biomass of halophila ovalis r. 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. Halophila ovalis internode length was found to increase during the latemonsoon each year at reef habitats in the dry tropics.
Primary production of deepwater halophila ovalis meadows. Herbarium images are portable document files pdf and require acrobat reader for viewing. Antibacterial activity of three south indian seagrasses. The distribution, biomass and primary production of the. Among various tropical seagrass species, halophila ovalis is known to be preferred by dugongs dugong dugon preen 1995. Halophila ovalis plants responses under laboratory condition. Halophila ovalis is a seagrass in the family hydrocharitaceae, a common name is paddle weed. Files are available under licenses specified on their description page. Spoon seagrasses halophila ovalis on the shores of singapore. Seagrass as a potential source of natural antioxidant and.
Halophila ovalis showed the maximum percentage of showed protection percentage of culex quinquefasciatus mosquito protection 95 and protection time 4. Effects of water depth on clonal characteristics and. The indopacific region has the largest number of seagrass species worldwide and this region is considered as the origin of the hydrocharitaceae. 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.
Jul 02, 2014 this page was last edited on 9 july 2018, at 06. Halophila ovalis, state herbarium of south australia. Rhizomatous, dioecious, submerged, marine or estuarine perennial, herb. An assessment on habitat, environment and morphological characteristics of halophila ovalis are described for the 11 locations.
The plants grow from a single rhizome and prefer shallow, calm protected habitats but can be found as deep as 80 feet. To assess the role of this plant in the biogeochemical cycling of the estuary, its biomass, nutrient dynamics and oxygen rele. Halophila decipiens is the only tropical circumglobal seagrass, living subtidally at approximately 6. Halophila ovalis was investigated in four seagrass beds, i. The university of minnesota is an equal opportunity educator and employer. Pdf primary production of deepwater halophila ovalis. Recent morphological and molecular studies by uchimura et al. Halophila decipiens was used as outgroup, because it is closer to its ancestor than the halophila ovalis complex. Find, read and cite all the research you need on researchgate. Studies suggest that halophila ovalis can recover rapidly from grazing by dugong.
Seagrass halophila ovalis is affected by light quality. The seagrass, halophila ovalis was grown in culture to investigate its responses to artificial shading. 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. The relationship of genetic differentiation and geographic barriers.
Endophytic fungi from three commonly found seagrasses in southern thailand were explored for their ability to produce antimicrobial metabolites. All phylogenetic trees achieved from analysis were analyzed and exactly constructed by the tree of trees approach. The distribution of tropical seagrasses with relation to their tolerance. Updated by the flora of north america expertise network, in connection with an update for usda plants 20072010 reference for. The atlas of florida plants provides a source of information for the distribution of plants within the state and taxonomic information. Antinociceptive and antiinflammatory activities of sargassum. Portion of branch, with leaves removed, showing young male and female flowers. An experimental test of the occurrence of competitive interactions. Habit of fertile plant with hairy leaves from northern territory. It is a small herbaceous plant that occurs in sea beds and other saltwater environments in the indopacific. Jul 03, 2018 download fsc part 2 pak studies urdu short question answer notes. Halophila ovalis in the tropical atlantic ocean sciencedirect. Seagrasses are nutraceutical in nature and therefore of importance as food supplements. The roots of halophila ovalis are sheathed by root cap cells up to 2 mm above the meristem tip, and carry prominent root hairs.
In the hot plate test, the antinociceptive effect was observed only in. It is a small herbaceous plant that occurs in sea beds and other saltwater environments. Stone hartog classification click on a scientific name below to expand it in the plants classification report. Nutrient requirements of in vitro cultured halophila. Electronic flora of south australia species fact sheet. Halophila ovalis in the tropical atlantic ocean request pdf. Nutrient cycling associated with the seagrass halophila. The website also provides access to a database and images of herbarium specimens found at the university of south florida and other herbaria. Root development in the seagrass halophila ovalis r. 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 plant occurs around reefs, estuaries, islands, intertidal areas, on soft sand or mud substrates. Temporal and spatial morphological variability of the. It grows rapidly with leaf pairs emerging from the. Pdf growth and biomass production of leaf seagrass.
963 469 1559 142 479 25 1603 1080 997 1196 613 1115 1655 245 1360 596 1600 223 381 1353 1222 583 1246 27 256 1168 135 351 1561 1573 1298 466 421 196 472 456 222 762 355 1194 379 906 547 1085 1353 25 409 114 290