In particular, the growth and development of the sea lettuce ulva spp. Ulva lactuca, also known by the common name sea lettuce, is an edible green alga in the family ulvaceae. World register of marine species ulva intestinalis. The type species within the genus ulva is ulva lactuca, lactuca being latin for lettuce. Largescale green tides of ulva prolifera occur repeatedly in the yellow sea, and the microscopic propagules of u. Conspecific cues that induce spore settlement in the. Here, we compare species found in 2002 and in 20142016.
The contribution of attached ulva prolifera on pyropia aquaculture rafts to green tides in the yellow sea hongbin han1, 2, shiliang fan1, wei song1, yan li1, 3, jie xiao1, zongling wang1, 2, 3, xuelei zhang1, 3, dewen ding1, 2 1 key laboratory of marine ecoenvironmental science and technology, first institute of oceanography, ministry of natural resources, qingdao 266061, china. All structured data from the file and property namespaces is available under the creative commons cc0 license. These green tides or blooms are a consequence of human activities. Ulva intestinalis is a relatively cosmopolitan species known to form blooms in a diverse range of habitats around the world cummins et al. Ness, is a macro green alga species, frequently found in the coastal zone of seas and oceans. In their interpretations by later authors, the two species differ. Ulva intestinalis is a conspicuous bright grassgreen seaweed, consisting of inflated irregularly constricted, tubular fronds that grow from a small discoid base. Low recycling rates of rare earth elements rees are a consequence of inefficient, expensive andor contaminating methods currently available for the. Ulva intestinalis is pictured here attached to smooth basaltic rock in brackish water on mackenzie beach, just north of pacific rim national park. Potential of smokewater and one of its active compounds karrikinolide, kar 1 on the phytochemical and antioxidant activity of eucomis autumnalis. In the laboratory samples were rinsed with distilled water 7 and dried till constant weight at 40. This study quantified for the first time the effect of key factors on the reproduction of a tropical species of filamentous ulva ulva sp. The type species holotype of the genus ulva is ulva lactuca linnaeus.
A green method based on living macroalgae for the removal. Ulva prolifera propagules and microalgae are both present in seawater and share similar niches, but their potential interactions are poorly understood. The contribution of attached ulva prolifera on pyropia. Evaluation of antimycotic activity of extracts of marine. Find support for a specific problem on the support section of our website. Impact of enteromorpha intestinalis mats on near bed currents and. Growth, nutrient storage, and release of dissolved organic nitrogen by enteromorpha intestinalis in response to pulses of nitrogen and phosphorus. Ulva intestinalis and ulva compressa are two bloomforming morphologicallycryptic species of green seaweeds widely accepted as cosmopolitan in distribution. Extracts of cystoseira crinita and ulva intestinalis collected from the coastal region of sinop had antifungal efficacy against candida krusei 19. Response surface methodology was employed to optimize the ultrasoundassisted extraction of crude polysaccharides from the cell wall of ulva intestinalis.
Pdf occurrence and pathogenicity of pythium oomycota. An experiment was conducted to evaluate the effects of replacing soybean meal with the protein concentrate of ulva intestinalis upc in the diet of juvenile nile. The pdf file you selected should load here if your web browser has a pdf reader plugin installed for example, a recent version of adobe acrobat reader if you would like more information about how to print, save, and work with pdfs, highwire press provides a helpful frequently asked questions about pdfs alternatively, you can download the pdf file directly to your computer, from where it. The controlled timing of release of swarmers motile reproductive bodies was achieved when experiments were initiated in the early afternoon by exposing. Also known as enteromorpha intestinalis description. Rock pools in the upper intertidal and saltmarshes, particularly in places where distribution. The membrane is two cells thick, soft and translucent and grows attached without a stipe to rocks by a small discshaped holdfast. The influence of the macroalgal mats of enteromorpha intestinalis on nearbed current velocities and sediment dynamics was. Bacteriainduced morphogenesis of ulva intestinalis and.
Bacteriainduced morphogenesis of ulva intestinalis and ulva mutabilis chlorophyta. Pdf an experiment was conducted to evaluate the effects of replacing soybean meal with the protein concentrate of ulva intestinalis upc in the diet. Its pathogenicity to a euryhaline ulva intestinalis collected in the same area was subsequently tested under salinities of 0, 15, and 30 parts per thousand ppt. Laboratory algae cultivation and bmp tests with ulva intestinalis from the gulf of riga abstract. This species is a common feature of tidepools around the world, where it is known variously as sea hair or more appropriately gut weed. The bright to pale green tubular thallus reaches 20 cm 8 in or more tall and up to 5 mm 0.
This algae is quite possibly the best algae to grow to reduce no3. The genus ulva is distinguished morphologically from closely related ulvalean enteromorpha by its flat, twocell layer distromatic morphology, in contrast to the latter with. The amount of crabs found in tide pools that did not contain u. Pdf ulva lactuca, a source of troubles and potential riches. Strong endemism of bloomforming tubular ulva in indian. Effects of culture conditions on the growth and reproduction of gut weed. Chlorophyta depend on bacteria releasing morphogenetic compounds. The green seaweed ulva is a major fouling organism but also an edible aquaculture product in asia. Here, we present six species ulva australis aresch. Ulva intestinalis, amphiroa rigida by hand on the depth 0. Free fulltext pdf articles from hundreds of disciplines, all in one place abiotic factors affecting the development of ulva sp. The genus ulva chlorophyta is ubiquitous along israeli mediterranean shores where it has been studied extensively due to its important ecological role and potential value in biotechnology and aquaculture.
Ulva lactuca is a green macro alga involved in devastating green tides observed worldwide. Methods for the induction of reproduction in a tropical. Bioassayguided classification of the bacteriainduced morphogenesis of ulva intestinalis. Macroalgal microbiomes have core functions related to biofilm formation, growth, and morphogenesis of seaweeds. An experiment was conducted to evaluate the effects of replacing soybean meal with the protein concentrate of ulva intestinalis upc in the diet of juvenile nile tilapia, oreochromis niloticus. Interactions between selected microalgae and microscopic. Knowledge of ulva aggregation provides clues for controlling this alga in marine biofouling and green tides. Pdf bacteriainduced morphogenesis of ulva intestinalis. Abiotic factors affecting the development of ulva sp. Link was originally described by linnaeus 1753 under the name ulva intestinalis as ulva tubulosa simplex and enteromorpha compressa l. The sea lettuces comprise the genus ulva, a group of edible green algae that is widely distributed along the coasts of the worlds oceans. Marlin the marine life information network gut weed. Echt darmwier in dutch tarmalg in swedish bibliographic references. Ulva intestinalis is a green alga in the family ulvaceae, known by the common names sea lettuce, gutweed and grass kelp.
Pdf why is ulva intestinalis the only macroalga inhabiting isolated. We hypothesized ulva contains conspecific settlement cues. Macroalgas do infralitoral do sul e sudeste do brasil. Original article effects of culture conditions on the growth and reproduction of gut weed, ulva intestinalis linnaeus ulvales, chlorophyta rapeeporn ruangchuay 1, sofhanee dahamat, anong chirapat2, and masahiro notoya3 1 department of technology and industry, faculty of science and technology, prince of songkla university, pattani campus, meaung, pattani, 94000 thailand. Significant effects were found on carbohydrate, fatty acid and ash content between the sites. This species thrives in high intertidal seepage areas or tidepools, attached or freefloating. Under axenic conditions, the macroalga ulva mutabilis develops a calluslike phenotype with cell wall protrusions.
Native, invasive and cryptogenic ulva species from the. With respect to its introduction to the great lakes drainage, authors typically mention that it is considered native to the atlantic coast of north america mills et al. This page was last edited on 19 december 2019, at 12. Fronds may be 1030 cm or more in length and 618 mm in diameter, the tips of which are usually rounded.
Seasonal variation in the mode of reproduction of ulva intestinalis in a brackish water. Antibacterial and antioxidant activities of differential. Asexual reproduction takes place by means of quadriflagellate zoospores. Meantime the nutrients role in biomass growth has been explored. Ulva intestinalis marine algae of cape cod, massachusetts. Laboratory algae cultivation and bmp tests with ulva. Decontamination treatments to eliminate problem biota from macroalgal tank cultures of osmundea pinnatifida, palmaria palmata and ulva lactuca, journal of applied phycology, 2016, pp. Ulva are thin flat green algae growing from a discoid holdfast that may reach 18 cm or more in length, though generally much less, and up to 30 cm across. Previous studies have shown that these are two distinct species that exhibit great morphological plasticity with changing seawater salinity. It was determined that ulva intestinalis does influence the number of crabs found in areas with u. Here we present a phylogeographic assessment of tubular ulva that we considered belonging to this. Ulva intestinalis is a green alga in the family ulvaceae, known by the common names sea.
To address the question of how ulva speciesspecific the morphogenetic activities of bacteria are, axenic cultures of u. Ethanolic extract of ulva intestinalis was reported to exhibit significant antibacterial activity and antihemolytic activity 41. Neutron activation analyses used to study elemental. The water lettuce ulva lactuca is green to dark green. Gut weed, ulva intestinalis linnaeus author miss arinee muna major program fishery technology academic year 2014 abstract effects of environmental factors on reproductive behavior of gut weed, ulva intestinalis linnaeus were conducted on conditions of reproductive type in the thalli. Ulva intestinalis is found in just about all the oceans of the world from tropical to temperate seas. The genus also includes the species previously classified under the genus enteromorpha, the former members of which are known under the common name green nori.
Inflated, hollow fronds with a bright grassgreen colour, strongly resembling the large instestines of mammals. Files are available under licenses specified on their description page. The hollow tubes can be constricted at irregular intervals like intestines. Decontamination treatments to eliminate problem biota from. Ulva, an important biofouling and green tideforming alga, forms aggregations that have adverse economic and ecological impacts. It is frequently found in protected habitats or areas influenced by. Until they were reclassified by genetic work completed in the early 2000s, the tubular members of the sea lettuce genus ulva were placed in the genus enteromorpha. However, little is known regarding the aggregation mechanism of ulva. An experimental assessment of the status of the species. Nine species of microalgae were selected to study their. Large green lumps of ulva intestinalis floating among other brown algae in brofjorden. Figure 2 total number of crabs found in tide pools where ulva intestinalis. Previous identifications of ulva in israel were based only on morphology.
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