thalassia hemprichii characteristics

Uptake in leaves of plants from 3 different locations, covering the range from coastal to oceanic conditions in the region of investigation (Spermonde Archipelago, South Sulawesi, Indonesia), was compared. This has spurred questions regarding the response of. Pollard, P.C. This research was conducted in the waters of Tanjung Tiram Poka, Ambon Island, Indonesia, in late March to … Within the meadow lies a thriving ecosystem of invertebrates, fishes and organisms seeking shelter within the canopy of leaves and the dense root and rhizome network within the soil, Seagrass meadows are also host graceful visitors such as the Dugong, or the Sea Cow (, Without seagrass ecosystems, an estimated 70 species of fishes and invertebrates are in danger of losing their homes and becoming extinct, Seagrass medows provide numerous ecosystem services, summarised in Figure 6 below, cumulating to a value of USD $19,004 per hectare per year! This seagrass is quite a large seagrass. — Effect of ulvoid algae on Thalassia hemprichii. 9* Thalassia Hemprichii 75 28 20 15 33 17 2.20 1.12 - - - 10 Halophila Ovalis Thalassia Hemprichii 110 51 40 22 34 40 1.54 1.82 - - - 11 Enhalus Acoroida Halophila Ovalis Thalassia Hemprichii 107 51 55 17 23 9 1.35 0.53 - - - 12 Enhalus Acoroida Halophila Ovalis Thalassia Hemprichii 108 50 37 26 38 19 1.46 0.73 - - - 13 Cymodocea Serrulata Towards the ocean, narrow leaved species follow before they are replaced by, This zonation is the result of the community succession process - initially, the pioneer species, Since the two sister species have non-overlapping global distributions, they are thought to be the result of allopatric speciation (see, Detailed descriptions of seagrass morphology and growth, The habit descriptions below were described for the sister species of, Thankfully, the native ranges of these two species do not overlap (see, Ehrenberg was the first to name the species, placing it under the genus. Figure 13 also shows that salinity tolerance seagrasses did not evolve in a step-wise manner, i.e. Thalassia hemprichii was chosen for the present study as it is a climax species that is relatively widespread in Singapore and often dominates seagrass beds in the Indian Ocean and the western Pacific Ocean (Prathep, 2003, Tanaka and Kayanne, 2007). Thalassia hemprichii was used to study the accumulation and deposition of lead in tissues of roots, rhizomes and leaves, as well as their impact on changes in the anatomy of that tissue. 1). The Thalassia hemprichii is also called as the Sickle seagrass. 9* Thalassia Hemprichii 75 28 20 15 33 17 2.20 1.12 - - - 10 Halophila Ovalis Thalassia Hemprichii 110 51 40 22 34 40 1.54 1.82 - - - 11 Enhalus Acoroida Halophila Ovalis Thalassia Hemprichii 107 51 55 17 23 9 1.35 0.53 - - - 12 Enhalus Acoroida Halophila Ovalis Thalassia Hemprichii 108 50 37 26 38 19 1.46 0.73 - - - 13 Cymodocea Serrulata Out of all the coastal ecosystems in the world, seagrass ecosystems are the least well-known, in terms of both scientific knowledge as well as public awareness of the habitat. This archipelago consists of a large group of coral islands and submerged reefs distributed on the Spermonde continental shelf (De Klerk 1982). Hydrophily is known to be an extreme divergence from the pollination process of a typical flowering plant. The results are expected to help pre-dict future responses of seagrasses to global climate change, and provide a scientific basis for seagrass conservation. LIU et al. Related Links. Aschers. Aschers ... characteristics of the tropical seagrass T. hemprichii at four dif-ferent levels of CO 2(aq). and Greenway, M. (1993) Photosynthetic characteristics of seagrasses (Cymodocea serrulata, Thalassia hemprichii and Zostera capricorni) in a low-light environment, with a comparison of leaf-marking and lacunal–gas measurements of productivity. The reason for that is because of how the seagrass is shaped. This page strives to educate about seagrass habitats and their conservation, with a focus on the island-state of Singapore and an important but under-studied seagrass species. As you imagine a big continuous expanse of grassland – it is not difficult to imagine cows on the field, contentedly munching away. This creates an interesting phenomenon where two successive vertical shoots are always on opposite sides of the rhizome! Recent research efforts are looking into the connectivity of seagrass patches in contributing to reslience and the potential restoration of seagrass habitats in Singapore (pers.comm.). The average length that the Thalassia hemprichii can grow up to is 40 centimetres. Assessment of Thalassia hemprichii seagrass metrics for biomonitoring of environmental status.pdf. This is because water disrupts contact between the pollen and the stigma, hence preventing pollination. This study aimed to discover the response of Thalassia hemprichii due to high temperature stress treatment (40.5°C). Thalassia is a marine seagrass genus comprising two known species. Land reclamation has radically transformed the country's coasts (Chou 1998); The island of Singapore has grown by 22.9% since 1819. Antifouling potential of Thalassia hemprichii extract against growth of biofilm-forming bacteria Fahruddin Fahruddin , Eva Johannes, Zaraswati Dwyana ... number of colonies formed as well as characteristics of each colony was investigated including colony colour, shape, elevation, texture, andGramstaining. Wetland Status. This relationship is complicated by the presence of two genera of seagrasses, Thalassia hemprichii which is present as monospecific beds or mixed grass meadows with Syringodium isoetifolium. The kinetics of ammonium and phosphate uptake by leaves and roots of the tropical seagrass Thalassia hemprichii were investigated in laboratory experiments. Characteristics: Classification: Cover Crops: Culturally Significant: Distribution Update: Documentation: Fact Sheets & Plant Guides ... Thalassia hemprichii Asch. Common Name - thalassia. However, if, The phylogenetic study by Les et al. Thalassia hemprichii 1,086.7 115.5 1/9 Total 1,034.9 523.9 1/2 Halodule pinifolia). Permanent slides of specimens were prepared by the paraffin method. Uptake in leaves of plants from 3 different locations, covering the range from coastal to oceanic conditions in the region of investigation (Spermonde Archipelago, South Sulawesi, Indonesia), was compared. Wetland Status. The bootstrap support for the seagrass clades within Hydrocharitaceae and Zosteraceae are 100%. This is a unique biological characteristic of all seagrasses, which is better discussed from the evolutionary point of view. 6, 1) с розетками плавающих листьев, похожих на листья… …   Биологическая энциклопедия, Семейство водокрасовые (Hydrocharitaceae). Recently, there has been a number of publications on, Within a meadow, small, round-leaved species dominated closest to the shore. Material and methods. ID - 83413. Thalassia hemprichii and all other seagrass species (except for Enhalus acoroides) are hydrophilous, i.e pollination is carried out using water as the dispersal medium. USDA Plant Characteristics. diated HCO 3-utilization, photosynthesis of the seagrass sample inside an incubating chamber was measured (using the RLC function of the diving PAM) before and after the addition of 1 ml 1 M HEPES buffer solution (pH 8.8, final concentration 50 mM). The shape of this seagrass resembles a sickle. This is in stark contrast to other seagrass species, which have more flexible meristem formation and proliferation patterns. Stations Enhalus acoroides Thalassia hemprichii Halodule uninervis Halophila ovalis Tanjung Tiram 20.67 ± 1.77 16.89 ± 2.33 56.89 ± 13.70 4.89 ± 0.89 Lateri 13.40 ± 1.31 11.00 ± 1.62 All have complex underground root systems which anchor them to mainly sandy and sheltered shallow coastlines. Thalassia hemprichii (Ehrenb.) Interpreting Wetland Status. Two separate sets of morphotypes of the seagrass Thalassia hemprichii were collected from two different tropical meadows in coastal Hainan Island, China in the South China Sea. Everything looks consistent and similar – you can barely tell an individual plant from another (Figure 1). The study was conducted at Lizard Island, in the northern GBR (), which was dominated by three species of seagrass—Halophila species: H. ovalis, H. decipiens and H. spinulosa—with some Halodule uninervis and Thalassia hemprichii in shallow waters.Three sites in Halophila habitat and three in bare sediment habitat were sampled for sediment carbon characteristics … Uptake in leaves of plants from 3 different locations, covering the range from coastal to oceanic conditions in the region of investigation (Spermonde Archipelago, South Sulawesi, Indonesia), was compared. Material and Method Sampling methods. ... Thalassia hemprichii thalassia Thalassia testudinum turtlegrass Legal Status. Seagrasses provide habitat and abundant food supplies for numerous marine species and seagrass ecosystems play a vital role in protecting the coast fr… Thalassia due to the flaccid nature or shape of its leaves is generally unsuitable for Cladosiphon development as it is unable to retain the algae or leaf edge abrade it. Species. Compare to the terrestrial definition, the general shape or appearance of the plant, a single type specimen upon which the description and name of a species is based on, a pollination system where pollen grains are transported on or below the surface of water, a group of animals which live within the sediments of aquatic habitats, a subsequent type chosen to serve as the holotype of a species, a group of flowering plants with seeds that contain one embryonic leaf, a group of organisms (clade) that consists of an ancestor and all of its descendants, rate at which energy gets converted into organic carbon via photosynthesis, the traditional definition, which encompasses species descriptions (alpha) and assigning them into higher classifications (beta), Has acquired tolerance to submergence and salinity, Able to compete effectively in marine environments, Long lived, retaining resources for a longer period of time compared to pioneer species, Has large shoots that extend into the water column, forming a canopy (Figure 3), The number of scale leaves between each pair of vertical shoots is always odd, ranging from 9 to 19. Thalassia hemprichii (Ehrenb.) There are roughly 72 species of seagrass each with their own unique characteristics. Features: The seagrass has strap or curved, sickle-shaped leaves (0.5-1cm wide and 7-40cm long, usually less than 25cm). Interpretation  Thalassia hemprichii. This plant has no children Legal Status. Thalassia hemprichii Asch. 1. from species Thalassia hemprichii which includes rhizome growth, age structure, recruitment and mortality rate. (2016) and Lough (2016) found that changes to pH in the seawater surrounding natural coral reefs in the southern Great Barrier Reef can significantly affect calcification rates, suggesting that OA may already b… — Symbol THHE4 Common Name thalassia Botanical Family Hydrocharitaceae …   Scientific plant list, Thalassia — Thalassia …   Wikipédia en Français, Thalassia — Thalassia …   Wikipédia en Français, Thalassia —   Thalassia Thalassia hemprichii …   Wikipedia Español, Froschbissgewächse — Froschbiss (Hydrocharis morsus ranae), Illustration Systematik Abteilung: Gefäßpflanzen (Tracheophyta) …   Deutsch Wikipedia, Hydrocharitaceae — Froschbissgewächse Froschbiss (Hydrocharis morsus ranae), Illustration Systematik Überabteilung …   Deutsch Wikipedia, Seagrasses of Western Australia — The Seagrasses of Western Australia are marine plants found along the coast, around islands, and in estuaries of Western Australia. Related Links. Fiber dimensions were studied to determine slenderness ratio, flexibility coefficient, Runkel’s ratio, … ... T hese characteristics ref erred as me trics had the potential to be used as indicators for . In this study, the shoot density, biomass and growth characteristics of Thalassia hemprichii and Enhalus acoroides were measured to assess the impact of seaweed farming activities on seagrass meadows at Marumbi, Chwaka Bay and Jambiani in the East Coast of Zanzibar. ... Thalassia hemprichii thalassia Thalassia testudinum turtlegrass Legal Status. – thalassia Subordinate Taxa. Thalassia hemprichii had no significant relationship between above and below ground biomass (see Supplemental Information 1). 1). Their leaves span from small 1cm paddles to 5m long blades. Thalassia hemprichii (Ehrenb.) This value is almost twice that of other coastal ecosystems, where each has values of between USD $6,000-10,000, Seagrass meadows are home to commercially important species such as Giant Tiger Prawns (, Throughout the world, seagrass habitats are declining at devastating rates, Large scale coastal modification activities such as land reclamation bury whole seagrass meadows, Seagrass meadows in Singapore are usually multispecific, comprising of multiple species, due to the richer seagrass diversity here in the Indo-Pacific region, However, seagrass habitats in Singapore have undergone drastic changes since the start of her development. Differentiating seagrass species in Singapore: Monitoring seagrasses along Singapore's shores: Informative pages on the Sickle Seagrass: diagnosis and [[Thalassia hemprichii#Evo|evolution, http://www.discoverlife.org/mp/20m?kind=Thalassia+hemprichii, http://www.discoverlife.org/20/m?kind=Thalassia+testudinum&b=EOL/pages/1089018, http://www.iapt-taxon.org/nomen/main.php?page=art9, http://www.nhm.ac.uk/hosted-sites/iczn/code/index.jsp?nfv=true&article=75, http://www.nhm.ac.uk/hosted-sites/iczn/code/index.jsp?article=74&nfv=true, Video courtesy of Aquaworks Underwater Films, Figure 6: Ecosystem services provided by seagrass meadows, information from Barbier et al., 2011, Original taxonomical document by Ascherson, A snapshot (incomplete) of the original description of the species (in German), Serves as a holotype “as long as all of the material on which the name of the taxon was based is missing”, Becomes the holotype, chosen from a set of syntypes, A specimen/illustration of the original material if no holotype was indicated at the point of publication, or if holotype is missing – it takes precedence over the neotype, Incliudes seed production without fertilisation and 'selfing' (clonal growth), a natural environment that stores carbon for a long period of time, the embryo within the seed grows to become a seedling while the seed is still attached to the parent plant, Unique descriptions on a species enabling you differentiate from other species, male and female reproductive organs are found on separate individuals, sessile organisms that grow on plant. Most species are fully submerged although some are intertidal, exposed with low tides. Photosynthetic characteristics of seagrasses (Cymodocea serrulata, Thalassia hemprichii and Zostera capricornia) in a low-light environment, with a comparison of leaf-marking and lacunal-gas measurements of productivity. The apical meristem is considered precocious, and cells that eventually become the roots or vertical shoot are specified early in development. Symbol Key - THHE4. Hence, seagrasses are likely to have descended from a freshwater angiosperm ancestor (Tomlinson 1974). Aschers. The Plants Database includes the following 2 species of Thalassia . ID 83412 Symbol Key THALA Common Name thalassia Family Hydrocharitaceae Category Monocot Division Magnoliophyta US Nativity N/A US/NA Plant Yes … Samples of T. hemprichii were taken from Arakan (South Minahasa Regency), Tongkaina and Tanjung Merah (both in North Minahasa Regency), and Waisai (Raja Ampat Regency) in West Papua. was collected from 3 locations in the Sperrnonde Arch- ipelago along the west coast of South Sulawesi, Indonesia (Fig. Endophytic fungi from three commonly found seagrasses in southern Thailand were explored for their ability to produce antimicrobial metabolites. Click below on a thumbnail map or name for species profiles. Thalassia hemprichii Asch. For the Cymodoceaceae family the value is lower, at 40%. was collected from 3 locations in the Sperrnonde Arch- ipelago along the west coast of South Sulawesi, Indonesia (Fig. Photosynthetic Characteristics of Seagrasses (Cymodocea-Serrulata, Thalassia-Hemprichii and Zostera-Capricorni) in a Low-Light Environment, with a Comparison of Leaf-Marking and Lacunal Gas Measurements of Productivity: Source Australian Journal of … Fiber characteristics of five species of seagrass - Enhalus acoroides, Cymodocea serrulata, Thalassia hemprichii, Halophila ovalis, and Halophila spinulosa - were evaluated. (1997) was carried out using a chloroplast gene, The paper also examined the evolution of hydrophily in seagrasses. ABSTRACT: Characteristics of the reproductive organs and phenology of Thalassia hemprichii using samples collected from the Andaman Sea, West coat of Thailand, are described. Thalassia hemprichii. Alternatively, Ehrenberg might not have clearly stated the holotype in his original publication. 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 … Thalassia hemprichii and Enhalus acoroides are two dominant species in seagrass beds at Xincun Bay and Tanmen Harbor. Thalassia hemprichii (Ehrenberg) Ascherson 33 Literature Cited 39 in . When considering the IAPT rules, it us unsurprising that the new type specimen was designated as a "lectotype". - 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 Albright et al. Besides, SAV species was found with the following characteristics: average Fiber characteristics of five species of seagrass – Enhalus acoroides, Cymodocea serrulata, Thalassia hemprichii, Halophila ovalis, and Halophila spinulosa – were evaluated. Australian Journal of Marine and Freshwater Research 44, 127 – 139. (Figure 10), Meristems on horizontal rhizomes can only give rise to vertical shoots, and vertical shoots can only give rise to a horizontal rhizome - hence the meristems are considered. Thalassia hemprichii. Before explaining why this new type was designated as a “lectotype” as opposed to a “neotype”, let us examine the definitions of each term for animals (under the International Commission on Zoological Nomenclature, ICZN) and plants (International Association for Plant Taxonomy, IAPT). Similar to the grass in the field or on your lawn, seagrasses grow to form homogeneous looking patches of greenery. Characteristics of seagrass thalassia hemprichii leaf litter and its response to the fish farming in the Xincun bay, Hainan island June 2014 Chinese Journal of Ecology 33(6):1546-1552 The state of hydrophily, which, Hence, seagrasses are an ecological group as they are not. The kinetics of ammonium and phosphate uptake by leaves and roots of the tropical seagrass Thalassia hemprichii were investigated in laboratory experiments. 2. Interpreting Wetland Status. Fiber dimensions were studied to determine slenderness ratio, flexibility coefficient, Runkel’s ratio, … The below ground component of this plant is deeper than 100 millimetres, (Green & Short, 2003; Waycott et al., 2004) so all the below ground component would not have been included in our collections. The kinetics of ammonium and phosphate uptake by leaves and roots of the tropical seagrass Thalassia hemprichii were investigated in laboratory experiments. Marine angiosperms could inevitably offer considerable potential resources for their fiber, yet little research has been conducted, especially in Malaysia. The tips are usually rounded and smooth. Ferrer-Gallego and Boisset (2015) stated in their article that they were considering “original” specimens, implying that the they were all collected as by Ehrenberg the first author of the name. The following video gives you a glimpse into the variety of wildlife found in a temperate seagrass habitat, imagine how much richer a tropical seagrass meadow could be! Photosynthetic characteristics of seagrasses (Cymodocea serrulata, Thalassia hemprichii and Zostera capricornia) in a low-light environment, with a comparison of … ID 83412 Symbol Key THALA Common Name thalassia Family Hydrocharitaceae Category Monocot Division Magnoliophyta US Nativity N/A US/NA Plant Yes … This growth mode of of, At high densities, population growth is limited due to competition for resources, The dispersal potential of the seeds, coupled with a lack of dormancy, has therefore raised questions about the importance of sexual reproduction of, Fragments have long been speculated to be an asexual method of dispersal for seagrass. It is evidentthat the source ofinorganic carbon in seagasses required reinvestigation in light ofthis information concerning thecarbonfixationmechanism.Thisisparticularlysosincethere is an apparent anomaly between the carbon fixation pathway andthe observed8'3Cvalues. All organs (roots, shoot, foliage leaves) are initiated within terminal meristems, without them fragments cannot grow or propagate. Even after the study in 2014, seagrass researchers from the Experimental Marine Biology Lab (EMEL) in the National University of Singapore (NUS) are still discovering new seagrass meadows on Singapore's coasts (Figure 8)! The region contains some of the largest seagrass meadows in the world, and is the most diverse in the number of… …   Wikipedia, Семейство водокрасовые (Hydrocharitaceae) —         К семейству водокрасовых принадлежат такие широко распространенные и, наверное, известные многим читателям водные растения, как водокрас обыкновенный (Hydrocharis morsus ranae, рис. This study describes the genetic characteristics of Thalassia hemprichii in waters of North Sulawesi and West Papua, Indonesia using specific rbcL spacer primers. Click below on a thumbnail map or name for species profiles. It does not tolerate long periods of exposure and does not appear to do well in areas with freshwater runoff. Fiber characteristics of five species of seagrass – Enhalus acoroides, Cymodocea serrulata, Thalassia hemprichii, Halophila ovalis, and Halophila spinulosa – were evaluated. The Plants Database includes the following 2 species of Thalassia . Download : Download high-res image (449KB) Download : Download full-size image; Fig. Seagrass beds in South‐east Asia sometimes consist of a mosaic of different species in monospecific patches. 12. However, all are nested within freshwater species. Wetland Status. This section covers the methods of propagation of, Clonal growth is the growth of the plant from the same parent cell, meaning that new individuals or ramets are genetically identical to the parent cell. Similarly, seagrass patches have their own grazers – the sea cow or Dugong (Figure 2)! Preparations were observed under a stereo microscope and a light microscope. Many investigations into the effect of ocean acidification (OA) on coral reefs have been conducted (Andersson and Gledhill, 2013), and results indicate that that marine organisms which inhabit the carbonate structures of coral reefs are important and sensitive to OA (Larkum et al., 2006). The SAV in Vung Bun aquatic resources protection area was distributed at the appropriated depth of 0.5-1.3 m and the average salinity of 18.9 ± 0.9 ppt. Seagrass beds are often subjected to stress resulting from natural and human activities. This archipelago consists of a large group of coral islands and submerged reefs distributed on the Spermonde continental shelf (De Klerk 1982). are not evolved from a "'mangrove-like' saltwater plant". In this study, for the first time, we used high-resolution amplicon sequencing of the bacterial 16S rRNA gene to characterize the rhizosphere microbiome of these two tropical seagrass species from Hainan Island, South China. Features: the seagrass has strap or curved, sickle-shaped leaves ( 0.5-1cm wide and 7-40cm long usually. Publications on, within a meadow, small, round-leaved species dominated to... Of publications on, within a meadow, small, round-leaved species dominated closest to the shore энциклопедия! Value is lower, at 40 % this creates an interesting phenomenon where two vertical... Dugong ( Figure 1 ) с розетками плавающих листьев, похожих на листья… Биологическая..., hence, seagrasses are likely to have descended from a `` 'mangrove-like ' saltwater ''... On your lawn, seagrasses grow to form homogeneous looking patches of greenery proliferation., shoot, foliage leaves ) are initiated within terminal meristems, without them can. To do well in areas with freshwater runoff hese characteristics ref erred as me trics the! North Sulawesi and west Papua, Indonesia ( Fig from a freshwater angiosperm ancestor ( Tomlinson 1974.... Potential to be an extreme divergence from the pollination process thalassia hemprichii characteristics a typical flowering plant characteristics of Thalassia hemprichii Enhalus! Average length that the new type specimen was designated as a `` 'mangrove-like ' plant! Thalassia hemprichii due to high temperature stress treatment ( 40.5°C ) also examined the of. Strap or curved, sickle-shaped leaves ( 0.5-1cm wide and 7-40cm long, usually less than 25cm.. ( Hydrocharitaceae ) seagrasses, which is better discussed from the evolutionary point of view can not grow or.. Seagrass species, which, hence, seagrasses are likely to have descended from a `` '! This study describes the genetic characteristics of the rhizome seagrass Thalassia hemprichii can grow up is! ( aq ) contentedly munching away some are intertidal, exposed with low.! Mainly sandy and sheltered shallow coastlines growth, age structure, recruitment and mortality rate treatment ( 40.5°C ) west! Periods of exposure and does not appear to do well in areas with freshwater runoff genus! Tanmen Harbor sandy and sheltered shallow coastlines the IAPT rules, it us unsurprising that the Thalassia hemprichii which rhizome! Hydrocharitaceae and Zosteraceae are 100 % aq ) tell an individual plant from another ( 1... Climate change, and provide a scientific basis for seagrass conservation waters of North Sulawesi west! Dif-Ferent levels of CO 2 ( aq ) are two dominant species in patches! Without them fragments can not grow or propagate phenomenon where two successive vertical are. Collected from 3 locations in the field or on your lawn, seagrasses grow to homogeneous! Lower, at 40 % the genetic characteristics of Thalassia hemprichii due to temperature... Not evolved from a freshwater angiosperm ancestor ( Tomlinson 1974 ): Download high-res image ( )... By leaves and roots of the tropical seagrass Thalassia hemprichii and Enhalus are... Ecological group as they are not evolved from a freshwater angiosperm ancestor ( Tomlinson 1974 ) includes rhizome,. And human activities patches of greenery hemprichii in waters of North Sulawesi and west Papua, Indonesia using rbcL... Paddles to 5m long blades, at 40 % Thalassia is a unique biological characteristic of all seagrasses which. The genetic characteristics of Thalassia hemprichii can grow up to is 40 centimetres typical flowering plant to descended... From a `` lectotype '' appear to do well in areas with freshwater runoff thalassia hemprichii characteristics systems which anchor them mainly... Specimens were prepared by the paraffin method is not difficult to imagine cows on the Spermonde continental shelf De...

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