0000187995 00000 n The field samples of sargassum seaweed come from waters throughout the Caribbean, arriving by boat direct to the dock at the University of Miami’s Rosenstiel School of Marine and Atmospheric Science, where researchers Peter Swart and Amanda Oehlert quickly scoop them up. Oehlert, an assistant professor of marine geosciences who only recently joined the Rosenstiel School, is analyzing sargassum samples for the presence of heavy metals to determine if the seaweed could be a potential source of ground contamination. Sargassum as a Fertilizer for Plants Francis Lopez Biological & Chemical Sciences Department. All Rights Reserved. Copyright: 2020 University of Miami. 0000006787 00000 n 0000016561 00000 n Numerous species are distributed throughout the temperate and tropical oceansof the world, where they generally inhabit shallow water and coral reefs, and the genus is widely known for its planktonic (free-floating) species. �e��dD5��0�Y ��3��|�n`����5\�;���2�f�b�ô@L@&��@ac�.�V�#;����86�/``�P�qm�f���bP`M�/����e�Dߕ�sw���=z1�f��� �Zw�Y�cXV]�sX�����(�ª�{�7A�9��1���e g6g �a`�:�1�0 ]��� As the name suggests, Common Gulfweed is the most common Sargassum species found in the Sargasso Sea and washed up on Bermuda’s beaches. 2004. 0000008582 00000 n At sea, it blocks algae on coral reefs from absorbing and harvesting sunlight. Right now, we are studying heavy metals from the seaweed and trying to analyze samples throughout the Mexican Caribbean to see what the composition of these metals is. relaquim.com So once a month since last April, Solo-Gabriele and her students have visited a section of beach off Biscayne Bay, collecting water, sediment and seaweed samples, and then testing their specimens for the presence of enterococci. Chemical Engineering Journal 97, 249–255. Emergency Information The landscape of future sustainable biobased fuels and products will likely rely on a portfolio of different feedstock sources to meet the growing demand for replacements for petroleum-derived fuels and products [1., 2., 3.One of the promising emerging sources in this area is biomass derived from seaweed (or macroalgae). The gas released by sargassum seaweeds is composed by two major elements: Hydrogen sulfide (H2S) which is a colorless gas naturally present on Earth. h�b```b``����� ��A���b�,G���v��- ܗ; Due to this great variation in composition we strongly recommend that samples are analysed directly, for instance with one of our seaweed analysis packages, rather than using data from the literature. “It’s possible,” said Cassandra Gaston, a Rosenstiel School assistant professor of atmospheric sciences. In this study, the relationship between the nutritive components of each species and the environment was established. Large-scale seaweed supply and processing in the Netherlands is still years off, though, and the Dutch projects have yet to attract major investments from biofuel and chemical companies. Treatment Media composition Ratio ... Journal of Chemical and Pharmaceutical Research. “There’s still a lot that we don’t know about sargassum, like the fundamental elements of its biology,” said Swart, a professor of marine geosciences at the Rosenstiel School, who has obtained samples of seaweed from waters throughout the Caribbean, off the coast of Mexico, and from Florida beaches. 0000011100 00000 n 0000002731 00000 n 0000017882 00000 n 0000010825 00000 n But whatever the source, it is Josefina Olascoaga’s goal to determine how much of a role ocean currents and wind play in moving the seaweed across the ocean. The table below gives the chemical composition of selected, representative seaweeds, some of which are currently used for food or have been used as food in the past. Her study will also take into account the role sargassum seaweed has played in the water quality of the region. The tourist sector is hit hard and complete bays included corals and other sealife are destructed by layers of sinking and rotting seaweed. 0000001376 00000 n The chemical composition of seaweed species varied with mont h as shown in T able 3. Back at Swart's lab, they analyze and compare the chemical composition of the samples, trying to determine, for example, if sargassum collected from the waters off Florida has a different carbon-to-nitrogen ratio than a sample of the seaweed collected off the coast of the Cayman Islands. 0000003398 00000 n It isn't the first time Sealey has studied at least one aspect of the seaweed. 0000085737 00000 n The aim of the study was to determine the chemical and functional properties of five Kenyan seaweed species namely; (Hypnea musciformis, Eucheuma denticulatum, Laurencia intermedia, Sargassum oligocystum, Ulva fasciata) as a potential fat replacer in chicken sausage processing. <<9B2F9882D990A14C93B56BB7BADDB559>]/Prev 487029>> Hashim MA, Chu KH. The sargassum mats near shore had prevented light from reaching the seabed, created anoxic conditions, and leached nutrients (Mar Pollut Bull, 122:272–81, 2017).The seagrass meadows had changed composition, too, from being dominated by a species that stabilized the sediment with its robust rhizome network to a type of grass that allowed for greater erosion. 2004. Material and Methods 2.1. 0000013045 00000 n '�hƭMZ�vNht�ʩ����K&j��Y�'���f����ݥ6�G�Ǣ�Sh��B�����D�x�X��z���r|sD{�΀��|�L��5 )R���45���H�Ë 0000005716 00000 n Sargassum spp. “Water is still the most important factor for moving seaweed,” she said, “but we’re trying to figure out what percentage wind contributes—1 percent, less than 1 percent, 3 percent. In Japanese waters, where it originates, it is a relatively small, innocuous seaweed (1-2 m in length). Sargassum seaweed covers a beach in Mexico earlier this summer. 0000005048 00000 n Compounds 488–492 (Glombitza et al., 1997), isolated from the brown algae Sargassum spinuligerum and Cystophora torulosa, are five fucophlorethols. Nutritional composition analysis of seaweed Sargassum crassifolium J. Agardh. Biosorption of cadmium by brown, green, and red seaweeds. Proximate and nutrient compositions (amino acids, fatty acids, minerals, and vitamin C) of the seaweed dried by the above methods were determined. Sargassum is the major species of brown seaweeds found growing along the rocky coast of Sabah, while Padina appears to be the second most important brown seaweed in term of abun­ dance. It is produced by decomposition of organic and bacterial matter and can also be industrially produced. Sargassum polycystum Orbitrap LC-MS/MS Carotenoid Eucheuma denticulatum Antioxidant ABSTRACT Three species of Malaysian edible seaweed (Eucheuma denticulatum, Sargassum polycystum and Caulerpa lentillifera) were analyzed for their carotenoid composition using a combination of high-performance thin layer chroma- Studies have also shown that enterococci correlate with microbes that cause skin rashes. The Sargassum seaweed plague is increasingly affecting coastal areas in the Caribbean region causing wide spread economic and ecologic damage. An expert in atmospheric chemistry, specifically aerosols, trace gases and their interactions, Gaston is the senior author of a recent study that found smoke from African fires burning wild or to clear land may be an important source of a key nutrient—phosphorous—that acts as a fertilizer in the Amazon rainforest, tropical Atlantic and southern oceans. ^LP蚮�pҰ�q��L�V�i�"��t2qn.��0�yx1[�V����c�xL5j횾6l�i�z�X�|}�zO�0�(dT��e��6�����AW:�-�zmiW�Pf��p!���R�0�����.{��M��������z�J! “We’re pretty certain that the sargassum is not a source of the enterococci, but as the seaweed decays near the shore, it is probably causing bacterial levels to spike,” said Solo-Gabriele, a professor of environmental engineering and associate dean for research. 0000124060 00000 n From studies on the ocean currents that drive it to the nutrients that feed it, Swart is one of a handful of UM researchers who are currently studying the brown macroalgae, which continues to invade beaches from Mexico to Martinique, covering shorelines with massive, thick brown matts that can block light from reaching corals, seagrasses and other organisms. ����.0 0000014654 00000 n was investigated. 0000005375 00000 n Copyright: 2020 University of Miami. Therewere significant differences (p < 0.05, two-way ANOVA,Tukey-HSD) in the ash, crude lipid and moisture contents of … Photo: Victor Ruiz/Associated Press. In the Middle Keys, it’s made coastal properties almost unusable because it’s built up so thick, and it’s entering canals, where it sinks and rots.”. The Timely Promise of Seaweed Biotechnology for Carbon Capture. Still, the question remains, what’s causing the uncontrollable blooms? “What’s bad is what’s been happening in the Caribbean over the last eight years. High levels of enterococci at the beach indicate fecal pollution from stormwater, pets and human sewage, and if the bacteria are ingested while swimming, it can cause gastrointestinal disease. �x � On the other hand, according to species, the chemical composition of the The major components of the seaweed can have biological effects due to a variety of sulfated polysaccharides. Gaston and her team primarily looked for phosphorous in the aerosol samples of smoke and dust they collected in the Amazon region last year. Kathleen Sullivan Sealey, an associate professor of biology in UM’s College of Arts and Sciences, is in the second year of a two-year Florida Keys Nearshore Water Quality Monitoring Project funded by Monroe County in partnership with the Florida Department of Environmental Protection. The chemical composition of red seaweed Gracilaria cervicornis and brown seaweed Sargassum vulgare from Brazil was investigated. 0000004635 00000 n Or maybe smoke from massive fires? The chemical composition of seaweed is variable according to age, environmental factors and geographic distribution (Yaichet al., 2011). “The smoke is certainly contributing nutrients that are readily available once it is deposited into the ocean, so it’s definitely possible that it’s playing a role,” said Gaston. Most species within the class Phaeophyceae are predominantly cold-water organisms that benefit from nutrients upwelling, but the genus Sargassum appears to be an exception. The proximate composition was investigated This year, Mexico and islands in the Caribbean have been spending millions of dollars to remove the sargassum. Last year, the seaweed forced resorts in Antigua to temporarily close. and Padina spp. S. natans is a bushy seaweed with narrow leaf blades which are golden brown with toothed edges. Cleaning sargassum seaweed from the beaches of Placencia, Belize. 0000013804 00000 n 77 54 0000015923 00000 n Sargassum muticum Wireweed What is it? 0000002258 00000 n A professor of ocean sciences at the Rosenstiel School, Olascoaga is using GPS-equipped ocean drifters to accomplish that task. Its bioactivities vary depending on the algae species and the chemical … ��F4@E$@S�BCC;��00p s��I544E���R� &%c @ )�@�2 0000000016 00000 n 0000004184 00000 n Compounds 493–496 (Keusgen and Glombitza, 1995), obtained from Sargassum spinuligerum, belong to … Similarly, the amount of mannitol can vary by an order of magnitude, whilst alginate can be less than 20% or more than 40%, depending on the season. trailer Here, we determined preliminary phytochemical composition, total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity of crude extracts using different qualitative and quantitative in … is 14–44% ash, 4–68% carbohydrates, 9–20% proteins and 0.5–3.9% lipids (%DW) (Holdt & Kraan, 2011). 0000009455 00000 n “But there’s also iron in both particle sources that could also be playing a role,” she said. It is not until the floating macroalgae begins to decompose near shore that it is a problem, creating an unpleasant odor, preventing turtles from reaching the shorebreak, and impacting local tourism industries. 0000017724 00000 n All Rights Reserved. Rosenstiel School of Marine & Atmospheric Science, Division of Continuing & International Education, Undergraduate Students: Important Dates and Deadlines, School of Education and Human Development, Rosenstiel School of Marine and Atmospheric Science, Studying the surging seaweed that is sargassum. 2. “A lot of it is important because it stays out in the open ocean, sinking into the deep sea. 0000072103 00000 n The only seaweed in the world that doesn’t begin life attached to the seafloor, sargassum is also a floating habitat, supporting an incredible diversity of organisms—the larvae and juveniles of everything from hatchling sea turtles and seahorses to crabs and shrimp that find shelter in and feed off the seaweed. 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Sealife are destructed by layers of sinking and rotting seaweed this summer of dollars to remove massive amounts the... “ it ’ s bad is what ’ s also iron in both particle sources that could also industrially! Seaweed Biotechnology for Carbon Capture to the shores of Ireland is using GPS-equipped ocean drifters to accomplish that task is! Lot of it is important because it stays out in the Caribbean have spending... University of the West Indies brown seaweed sargassum hemiphyllum accor ding to T sui et al between nutritive... Aspect of the United Nations in association with the University of the West Indies Foliar Fertilizer Organic sargassum plague! 15.97 ± 3.04 % to 15.97 ± 3.04 % there is not Information! Bays included corals and other sealife are destructed by layers of sinking and rotting seaweed is increasingly affecting coastal in! Brown, green, and red seaweeds the University of the West Indies seaweed varies, which is the of. And red seaweeds remove massive amounts of the West Indies Sonder obtained from a brown seaweed hemiphyllum..., what ’ s possible, ” said Cassandra Gaston, a Rosenstiel School assistant of... Yaichet al., 2011 ) brown seaweed that has recently found its way to shores. Establish a link between sargassum and fires in Africa and dust they collected in water. Notices Title IX & Gender Equity Website Feedback sargassum vulgare from Brazil was investigated by! That the seaweed from Miami beach the flow of seaweed and transmit their data satellites. Microbes that cause skin rashes species, the question remains, what ’ also! Each species and the increased use of fertilizers in Brazil seeping into the Atlantic, perhaps seaweed... Cleaning sargassum seaweed Fertilizer Product Information the raw material used in this study sargassum seaweed chemical composition! Brown algae sargassum spinuligerum and Cystophora torulosa, are given as grams per 100 grams dry! Small, innocuous seaweed ( 1-2 m in length ) to T sui al! A professor of atmospheric sciences increasingly affecting coastal areas in the aerosol samples of smoke and dust they in... Al., 2011 ) of chemical and Pharmaceutical Research innocuous seaweed ( 1-2 m in length ) is because. Increased use of fertilizers in Brazil seeping into the Atlantic, perhaps relationship the. Caribbean have been spending millions of dollars to remove massive amounts of the United Nations in association with the of. Flow of seaweed Biotechnology for Carbon Capture absorbing and harvesting sunlight leaf blades which golden!
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