Biology:Kelp

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Short description: Large brown seaweeds in the order Laminariales

Kelp
Temporal range: Lutetian–Present
[1]
Kelp In Freycinet Tasmania.jpg
Scientific classification e
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Clade: Stramenopiles
Phylum: Gyrista
Subphylum: Ochrophytina
Class: Phaeophyceae
Order: Laminariales
Migula, 1909[2]
Families

Agaraceae
Akkesiphycaceae
Alariaceae
Aureophycaceae
Chordaceae
Laminariaceae
Lessoniaceae
Pseudochordaceae

Kelps are large brown algae or seaweeds that make up the order Laminariales. There are about 30 different genera.[3] Despite its appearance, kelp is not a plant but a stramenopile, a group containing many protists.[4]

Kelp grows in "underwater forests" (kelp forests) in shallow oceans, and is thought to have appeared in the Miocene, 5 to 23 million years ago.[5] The organisms require nutrient-rich water with temperatures between 6 and 14 °C (43 and 57 °F). They are known for their high growth rate—the genera Macrocystis and Nereocystis can grow as fast as half a metre a day, ultimately reaching 30 to 80 metres (100 to 260 ft).[6]

Through the 19th century, the word "kelp" was closely associated with seaweeds that could be burned to obtain soda ash (primarily sodium carbonate). The seaweeds used included species from both the orders Laminariales and Fucales. The word "kelp" was also used directly to refer to these processed ashes.[7]

Description

In most kelp, the thallus (or body) consists of flat or leaf-like structures known as blades. Blades originate from elongated stem-like structures, the stipes. The holdfast, a root-like structure, anchors the kelp to the substrate of the ocean. Gas-filled bladders (pneumatocysts) form at the base of blades of American species, such as Nereocystis lueteana, (Mert. & Post & Rupr.)[6] to hold the kelp blades close to the surface.

Growth and reproduction

Scuba diving in a kelp forest in California

Growth occurs at the base of the meristem, where the blades and stipe meet. Growth may be limited by grazing. Sea urchins, for example, can reduce entire areas to urchin barrens.[8] The kelp life cycle involves a diploid sporophyte and haploid gametophyte stage. The haploid phase begins when the mature organism releases many spores, which then germinate to become male or female gametophytes. Sexual reproduction then results in the beginning of the diploid sporophyte stage, which will develop into a mature individual.

The parenchymatous thalli are generally covered with a mucilage layer, rather than cuticle.[9]

Evolution of kelp structure

Under evolution by natural selection, seaweed were generally considered homologues of terrestrial plants, and an example of what is now called convergent evolution.[10] Kelp are a brown algae, a phyla that is as distantly related to plants as amoebozoans are to the CRuMs group, but they have evolved plant-like structures through convergent evolution.[11] Where plants have leaves, stems, and reproductive organs, kelp have independently evolved blades, stipes, and sporangia. With radiometric dating and the measure Ma “unequivocal minimum constraint for total group Pinaceae” vascular plants have been measured as having evolved around 419–454 Ma[12] while the ancestors of laminariales are much younger at 189 Ma.[13] Although these groups are distantly related as well as different in evolutionary age, there are still comparisons that can be made between the structures of terrestrial plants and kelp but in terms of evolutionary history, most of these similarities come from convergent evolution.

Some kelp species including giant kelp, have evolved transport mechanisms for organic as well as inorganic compounds,[14] similar to mechanisms of transport in trees and other vascular plants. In kelp this transportation network uses trumpet-shaped sieve elements (SEs). A 2015 study aimed to evaluate the efficiency of giant kelp (Macrocystis pyrifera) transport anatomy looked at 6 different laminariales species to see if they had typical vascular plant allometric relationships (if SEs had a correlation with the size of an organism). Researchers expected to find the kelp’s phloem to work similarly to a plant's xylem and therefore display similar allometric trends to minimize pressure gradient. The study found no universal allometric scaling between all tested structures of the laminariales species which implies that the transport network of brown algae is only just beginning to evolve to efficiently fit their current niches.[11]

Apart from undergoing convergent evolution with plants, species of kelp have undergone convergent evolution within their own phylogeny that has led to niche conservatism.[15] This niche conservatism means that some species of kelp have convergently evolved to share similar niches, as opposed to all species diverging into distinct niches through adaptive radiation. A 2020 study looked at functional traits (blade mass per area, stiffness, strength, etc.) of 14 species of kelp and found that many of these traits  evolved convergently across kelp phylogeny. With different species of kelp filling slightly different environmental niches, specifically along a wave disturbance gradient, many of these convergently evolved traits for structural reinforcement also correlate with distribution along that gradient. The wave disturbance gradient that this study refers to is the environments that this kelp inhabit have a varied level of perturbation from the tide and waves that pull at the kelp. It can be assumed from these results that niche partitioning along wave disturbance gradients is a key driver of divergence between closely related kelp.[15]

Due to the often varied and turbulent habitat that kelp inhabit, plasticity of certain structural traits has been a key for the evolutionary history of the phyla. Plasticity helps with a very important aspect of kelp adaptations to ocean environments, and that is the unusually high levels of morphological homoplasy between lineages. This in fact has made classifying brown algae difficult.[16] Kelp often have similar morphological features to other species within its own area since the roughness of the wave disturbance regime, but can look fairly different from other members of its own species that are found in different wave disturbance regimes. Plasticity in kelps most often involves blade morphology such as the width, ruffle, and thickness of blades.[17] Just one example is the giant bull kelp Nereocystis luetkeana, which have evolved to change blade shape in order to increase drag in water and interception of light when exposed to certain environments. Bull kelp are not unique in this adaptation, many kelp species have evolved a genetic plasticity for blade shapes for different water flow habitats. So individuals of the same species will have differences to other individuals of the same species due to what habitat they grow in.[18] Many species have different morphologies for different wave disturbance regimes[17] but giant kelp Macrocystis integrifolia has been found to have plasticity allowing for 4 distinct types of blade morphology depending on habitat.[19] Where many species only have two or three different blade shapes for maximizing efficiency in only two or three habitats. These different blade shapes were found to decrease breakage and increase ability to photosynthesize. Blade adaptations like these are how kelp have evolved for efficiency in structure in a turbulent ocean environment, to the point where their stability can shape entire habitats. Apart from these structural adaptations, the evolution of dispersal methods relating to structure have been important for the success of kelp as well.

Kelp have had to adapt dispersal methods that can make successful use of ocean currents. Buoyancy of certain kelp structures allows for species to disperse with the flow of water.[20] Certain kelp form kelp rafts, which can travel great distances away from the source population and colonize other areas. The bull kelp genus Durvillaea includes six species, some that have adapted buoyancy and others that have not. Those that have adapted buoyancy have done so thanks to the evolution of a gas filled structure called the pneumatocysts which is an adaptation that allows the kelp to float higher towards the surface to photosynthesize and also aids in dispersal by floating kelp rafts.[21] For Macrocystis pyrifera, adaptation of pneumatocysts and raft forming have made the species dispersal method so successful that the immense spread of coast in which the species can be found has been found to actually be very recently colonized. This can be observed by the low genetic diversity in the subantarctic region.[22] Dispersal by rafts from buoyant species also explains some evolutionary history for non-buoyant species of kelp. Since these rafts commonly have hitchhikers of other diverse species, they provide a mechanism for dispersal for species that lack buoyancy. This mechanism has been recently confirmed to be the cause of some dispersal and evolutionary history for kelp species in a study done with genomic analysis.[23] Studies of kelp structure evolution have helped in the understanding of the adaptations that have allowed for kelp to not only be extremely successful as a group of organisms but also successful as an ecosystem engineer of kelp forests, some of the most diverse and dynamic ecosystems on earth.

Kelp forests

Main page: Biology:Kelp forest

Kelp may develop dense forests with high production,[24][25] biodiversity and ecological function. Along the Norwegian coast these forests cover 5800 km2,[26] and they support large numbers of animals.[27][28] Numerous sessile animals (sponges, bryozoans and ascidians) are found on kelp stipes and mobile invertebrate fauna are found in high densities on epiphytic algae on the kelp stipes and on kelp holdfasts.[29] More than 100,000 mobile invertebrates per square meter are found on kelp stipes and holdfasts in well-developed kelp forests (Christie et al., 2003). While larger invertebrates and in particular sea urchins Strongylocentrotus droebachiensis (O.F. Müller) are important secondary consumers controlling large barren ground areas on the Norwegian coast, they are scarce inside dense kelp forests.[30]

Commercial uses

Alaskan beach kelp
Seaweed, kelp, raw
Nutritional value per 100 g (3.5 oz)
Energy180 kJ (43 kcal)
9.57 g
Sugars0.6
Dietary fiber1.3 g
0.56 g
1.68 g
VitaminsQuantity %DV†
Thiamine (B1)
4%
0.05 mg
Riboflavin (B2)
13%
0.15 mg
Niacin (B3)
3%
0.47 mg
Pantothenic acid (B5)
13%
0.642 mg
Folate (B9)
45%
180 μg
Vitamin C
4%
3 mg
Vitamin E
6%
0.87 mg
Vitamin K
63%
66 μg
MineralsQuantity %DV†
Calcium
17%
168 mg
Iron
22%
2.85 mg
Magnesium
34%
121 mg
Manganese
10%
0.2 mg
Phosphorus
6%
42 mg
Potassium
2%
89 mg
Sodium
16%
233 mg
Zinc
13%
1.23 mg
Link to USDA Database entry
†Percentages are roughly approximated using US recommendations for adults.
Source: USDA Nutrient Database

Giant kelp can be harvested fairly easily because of its surface canopy and growth habit of staying in deeper water.

Kelp ash is rich in iodine and alkali. In great amount, kelp ash can be used in soap and glass production. Until the Leblanc process was commercialized in the early 19th century, burning of kelp in Scotland was one of the principal industrial sources of soda ash (predominantly sodium carbonate).[31] Around 23 tons of seaweed was required to produce 1 ton of kelp ash. The kelp ash would consist of around 5% sodium carbonate.[32]

Once the Leblanc Process became commercially viable in Britain during the 1820s, common salt replaced kelp ash as raw material for sodium carbonate. Though the price of kelp ash went into steep decline, seaweed remained the only commercial source of iodine. To supply the new industry in iodine synthesis, kelp ash production continued in some parts of West and North Scotland, North West Ireland and Guernsey. The species Saccharina latissima yielded the greatest amount of iodine (between 10 and 15 lbs per ton) and was most abundant in Guernsey. Iodine was extracted from kelp ash using a lixiviation process.[33] As with sodium carbonate however, mineral sources eventually supplanted seaweed in iodine production.[34]

Alginate, a kelp-derived carbohydrate, is used to thicken products such as ice cream, jelly, salad dressing, and toothpaste, as well as an ingredient in exotic dog food and in manufactured goods.[35][36][37] Alginate powder is also used frequently in general dentistry and orthodontics for making impressions of the upper and lower arches.[38] Kelp polysaccharides are used in skin care as gelling ingredients and because of the benefits provided by fucoidan.[citation needed]

Kombu (昆布 in Japanese, and 海带 in Chinese, Saccharina japonica and others), several Pacific species of kelp, is a very important ingredient in Chinese, Japanese, and Korean cuisines. Kombu is used to flavor broths and stews (especially dashi), as a savory garnish (tororo konbu) for rice and other dishes, as a vegetable, and a primary ingredient in popular snacks (such as tsukudani). Transparent sheets of kelp (oboro konbu) are used as an edible decorative wrapping for rice and other foods.[39]

Kombu can be used to soften beans during cooking, and to help convert indigestible sugars and thus reduce flatulence.[40]

Saccharina latissima in canned salad form

In Russia, especially in the Russian Far East, and former Soviet Union countries several types of kelp are of commercial importance: Saccharina latissima, Laminaria digitata, Saccharina japonica. Known locally as "Sea Cabbage" (Морская капуста in Russian), it comes in retail trade in dried or frozen, as well as in canned form and used as filler in different types of salads, soups and pastries.[41]

Because of its high concentration of iodine, brown kelp (Laminaria) has been used to treat goiter, an enlargement of the thyroid gland caused by a lack of iodine, since medieval times.[42] An intake of roughly 150 micrograms of iodine per day is beneficial for preventing hypothyroidism. Overconsumption can lead to kelp-induced thyrotoxicosis.[43]

In 2010, researchers found that alginate, the soluble fibre substance in sea kelp, was better at preventing fat absorption than most over-the-counter slimming treatments in laboratory trials. As a food additive, it may be used to reduce fat absorption and thus obesity.[44] Kelp in its natural form has not yet been demonstrated to have such effects.

Kelp's rich iron content can help prevent iron deficiency.[45]

Commercial production

Commercial production of kelp harvested from its natural habitat has taken place in Japan for over a century. Many countries today produce and consume laminaria products; the largest producer is China. Laminaria japonica, the important commercial seaweed, was first introduced into China in the late 1920s from Hokkaido, Japan. Yet mariculture of this alga on a very large commercial scale was realized in China only in the 1950s. Between the 1950s and the 1980s, kelp production in China increased from about 60 to over 250,000 dry weight metric tons annually.

In history and culture

Some of the earliest evidence for human use of marine resources, coming from Middle Stone Age sites in South Africa, includes the harvesting of foods such as abalone, limpets, and mussels associated with kelp forest habitats.

In 2007, Erlandson et al. suggested that kelp forests around the Pacific Rim may have facilitated the dispersal of anatomically modern humans following a coastal route from Northeast Asia to the Americas. This "kelp highway hypothesis" suggested that highly productive kelp forests supported rich and diverse marine food webs in nearshore waters, including many types of fish, shellfish, birds, marine mammals, and seaweeds that were similar from Japan to California, Erlandson and his colleagues also argued that coastal kelp forests reduced wave energy and provided a linear dispersal corridor entirely at sea level, with few obstacles to maritime peoples. Archaeological evidence from California's Channel Islands confirms that islanders were harvesting kelp forest shellfish and fish, beginning as much as 12,000 years ago.

During the Highland Clearances, many Scottish Highlanders were moved on to areas of estates known as crofts, and went to industries such as fishing and kelping (producing soda ash from the ashes of kelp). At least until the 1840s, when there were steep falls in the price of kelp, landlords wanted to create pools of cheap or virtually free labour, supplied by families subsisting in new crofting townships. Kelp collection and processing was a very profitable way of using this labour, and landlords petitioned successfully for legislation designed to stop emigration. The profitability of kelp harvesting meant that landlords began to subdivide their land for small tenant kelpers, who could now afford higher rent than their gentleman farmer counterparts.[46] But the economic collapse of the kelp industry in northern Scotland during the 1820s led to further emigration, especially to North America.[citation needed]

Natives of the Falkland Islands are sometimes nicknamed "Kelpers".[47][48] This designation is primarily applied by outsiders rather than the natives themselves.

In Chinese slang, "kelp" (simplified Chinese: 海带; traditional Chinese: 海帶; pinyin: hǎi dài), is used to describe an unemployed returnee.[clarification needed] It has negative overtones, implying the person is drifting aimlessly, and is also a homophonic expression (Chinese: 海待; pinyin: hǎidài, literally "sea waiting"). This expression is contrasted with the employed returnee, having a dynamic ability to travel across the ocean: the "sea turtle" (simplified Chinese: 海龟; traditional Chinese: 海龜; pinyin: hǎi gūi) and is also homophonic with another word (simplified Chinese: 海归; traditional Chinese: 海歸; pinyin: hǎi gūi, literally "sea return").

Conservation

Overfishing nearshore ecosystems leads to the degradation of kelp forests. Herbivores are released from their usual population regulation, leading to over-grazing of kelp and other algae. This can quickly result in barren landscapes where only a small number of species can thrive.[49][50] Other major factors which threaten kelp include marine pollution and the quality of water, climate changes and certain invasive species.[51]

Gallery

  • Giant kelp in Monterey Bay Aquarium's Kelp Forest exhibit

  • Scuba diver in kelp forest

  • Blue rockfish in kelp forest

  • Anemone and seastar in kelp forest

  • An underwater shot of a kelp forest

  • A kelp forest

  • A close up view of Ecklonia maxima, giant brown kelp

  • Washed-up kelp found along the coast of La Jolla Shores

Prominent species

Species of Laminaria in the British Isles;

Species of Laminaria worldwide, listing of species at AlgaeBase:[52]

  • Laminaria agardhii (NE. America)
  • Laminaria bongardina Postels et Ruprecht (Bering Sea to California )
  • Laminaria cuneifolia (NE. America)
  • Laminaria dentigera Klellm. (California - America)
  • Laminaria digitata (NE. America)
  • Laminaria ephemera Setchell (Sitka, Alaska, to Monterey County, California - America)
  • Laminaria farlowii Setchell (Santa Cruz, California, to Baja California - America)
  • Laminaria groenlandica (NE. America)
  • Laminaria longicruris (NE. America)
  • Laminaria nigripes (NE. America)
  • Laminaria ontermedia (NE. America)
  • Laminaria pallida Greville ex J. Agardh (South Africa )
  • Laminaria platymeris (NE. America)
  • Laminaria saccharina (Linnaeus) Lamouroux, synonym of Saccharina latissima (north east Atlantic Ocean, Barents Sea south to Galicia - Spain)
  • Laminaria setchellii Silva (Aleutian Islands, Alaska to Baja California America)
  • Laminaria sinclairii (Harvey ex Hooker f. ex Harvey) Farlow, Anderson et Eaton (Hope Island, British Columbia to Los Angeles, California - America)
  • Laminaria solidungula (NE. America)
  • Laminaria stenophylla (NE. America)
Costaria costata, five-ribbed kelp

Other species in the Laminariales that may be considered as kelp:

  • Alaria esculenta (North Atlantic)[53]
  • Alaria marginata Post. & Rupr. (Alaska and California - America)
  • Costaria costata (C.Ag.) Saunders (Japan; Alaska, California - America)
  • Ecklonia brevipes J. Agardh (Australia; New Zealand)
  • Ecklonia maxima (Osbeck) Papenfuss (South Africa)
  • Ecklonia radiata (C.Agardh) J. Agardh (Australia; Tasmania; New Zealand; South Africa)
  • Eisenia arborea Aresch. (Vancouver Island, British Columbia, Montrey, Santa Catalina Island, California - America)
  • Egregia menziesii (Turn.) Aresch.
  • Hedophyllum sessile (C.Ag.) Setch (Alaska, California - America)
  • Macrocystis pyrifera (Linnaeus, C.Agardh) (Australia; Tasmania and South Africa)
  • Pleurophycus gardneri Setch. & Saund. (Alaska, California - America)
  • Pterygophora californica Rupr. (Vancouver Island, British Columbia to Bahia del Ropsario, Baja California and California - America)

Non-Laminariales species that may be considered as kelp:

Interactions

Some animals are named after the kelp, either because they inhabit the same habitat as kelp or because they feed on kelp. These include:

  • Northern kelp crab (Pugettia producta) and graceful kelp crab (Pugettia gracilis), Pacific coast of North America.
  • Kelpfish (blenny) (e.g., Heterosticbus rostratus, genus Gibbonsia), Pacific coast of North America.
  • Kelp goose (kelp hen) (Chloephaga hybrida), South America and the Falkland Islands
  • Kelp pigeon (sheathbill) (Chionis alba and Chionis minor), Antarctic

See also

References

  1. ↑ William Miller, III (13 October 2011). Trace Fossils: Concepts, Problems, Prospects: Chapter 13 "Zoophycos and the Role of Type Specimens in Ichnotaxonomy by Davide Olivero. Elsevier. pp. 224–226. ISBN 978-0-08-047535-6. https://books.google.com/books?id=FLDKUSoFmHMC&pg=PA224. Retrieved 1 April 2013. 
  2. ↑ Migula, W. (1909). Kryptogamen-Flora von Deutschland, Deutsch-Österreich und der Schweiz. Band II. Algen. 2. Teil. Rhodophyceae, Phaeophyceae, Characeae. Gera: Verlag Friedriech von Zezschwitz. pp. i–iv, 1–382, 122 (41 col.) pls. 
  3. ↑ Bolton, John J. (23 July 2010). "The biogeography of kelps (Laminariales, Phaeophyceae): a global analysis with new insights from recent advances in molecular phylogenetics". Helgoland Marine Research 64 (4): 263–279. doi:10.1007/s10152-010-0211-6. Bibcode: 2010HMR....64..263B. 
  4. ↑ Silberfeld, Thomas; Rousseau, Florence; de Reviers, Bruno (2014). "An Updated Classification of Brown Algae (Ochrophyta, Phaeophyceae)". Cryptogamie, Algologie 35 (2): 117–156. doi:10.7872/crya.v35.iss2.2014.117. 
  5. ↑ University of California Museum of Paleontology: The Miocene Epoch
  6. ↑ 6.0 6.1 Thomas, D. 2002. Seaweeds. The Natural History Museum, London, p. 15. ISBN:0-565-09175-1
  7. ↑ "Kelp," in Oxford English Dictionary (Second Edition). Oxford University Press, 1989. Retrieved 1 December 2006
  8. ↑ Norderhaug, KM., Christie, H. 2009. Sea urchin grazing and kelp re-vegetation in the NE Atlantic. Marine Biology Research 5: 515-528. Estuarine, Coastal and Shelf Science 95: 135-144
  9. ↑ Fritsch, F. E. (1945). Structure and Reproduction of the Algae, Volume 2. Cambridge University Press. p. 226. ISBN 9780521050425. OCLC 223742770. 
  10. ↑ Darwin, C. The Voyage of the Beagle; P. F. Collier & Son Corporation: New York, 1860
  11. ↑ 11.0 11.1 Drobnitch, Sarah Tepler; Jensen, Kaare H.; Prentice, Paige; Pittermann, Jarmila (2015-10-07). "Convergent evolution of vascular optimization in kelp (Laminariales)" (in en). Proceedings of the Royal Society B: Biological Sciences 282 (1816): 20151667. doi:10.1098/rspb.2015.1667. ISSN 0962-8452. PMID 26423844. 
  12. ↑ Clarke, John T.; Warnock, Rachel C. M.; Donoghue, Philip C. J. (October 2011). "Establishing a time‐scale for plant evolution" (in en). New Phytologist 192 (1): 266–301. doi:10.1111/j.1469-8137.2011.03794.x. ISSN 0028-646X. PMID 21729086. 
  13. ↑ Silberfeld, Thomas; Leigh, Jessica W.; Verbruggen, Heroen; Cruaud, Corinne; de Reviers, Bruno; Rousseau, Florence (August 2010). "A multi-locus time-calibrated phylogeny of the brown algae (Heterokonta, Ochrophyta, Phaeophyceae): Investigating the evolutionary nature of the "brown algal crown radiation"". Molecular Phylogenetics and Evolution 56 (2): 659–674. doi:10.1016/j.ympev.2010.04.020. PMID 20412862. 
  14. ↑ Manley, Steven L. (March 1983). "Composition of Sieve Tube Sap from Macrocystis Pyrifera (Phaeophyta) With Emphasis on the Inorganic Constituents" (in en). Journal of Phycology 19 (1): 118–121. doi:10.1111/j.0022-3646.1983.00118.x. ISSN 0022-3646. 
  15. ↑ 15.0 15.1 Starko, Samuel; Demes, Kyle W.; Neufeld, Christopher J.; Martone, Patrick T. (October 2020). Carrington, Emily. ed. "Convergent evolution of niche structure in Northeast Pacific kelp forests" (in en). Functional Ecology 34 (10): 2131–2146. doi:10.1111/1365-2435.13621. ISSN 0269-8463. 
  16. ↑ Draisma, Stefano G. A.; Prud'Homme van Reine, Willem F.; Stam, Wytze T.; Olsen, Jeanine L. (August 2001). "A Reassessment of Phylogenetic Relationships Within the Phaeophyceae Based on Rubisco Large Subunit and Ribosomal DNA Sequences" (in en). Journal of Phycology 37 (4): 586–603. doi:10.1046/j.1529-8817.2001.037004586.x. ISSN 0022-3646. 
  17. ↑ 17.0 17.1 Koehl, M. A. R.; Silk, W. K.; Liang, H.; Mahadevan, L. (December 2008). "How kelp produce blade shapes suited to different flow regimes: A new wrinkle". Integrative and Comparative Biology 48 (6): 834–851. doi:10.1093/icb/icn069. ISSN 1540-7063. PMID 21669836. 
  18. ↑ Lobban, C. S., Wynne, M. J., & Lobban. (1981). The Biology of Seaweeds. University of California Press.
  19. ↑ Hurd, C. L.; Harrison, P. J.; Druehl, L. D. (August 1996). "Effect of seawater velocity on inorganic nitrogen uptake by morphologically distinct forms of Macrocystis integrifolia from wave-sheltered and exposed sites" (in en). Marine Biology 126 (2): 205–214. doi:10.1007/BF00347445. ISSN 1432-1793. 
  20. ↑ Garden, Christopher J.; Currie, Kim; Fraser, Ceridwen I.; Waters, Jonathan M. (2014-03-31). "Rafting dispersal constrained by an oceanographic boundary" (in en). Marine Ecology Progress Series 501: 297–302. doi:10.3354/meps10675. ISSN 0171-8630. Bibcode: 2014MEPS..501..297G. 
  21. ↑ Fraser, Ceridwen I.; Velásquez, Marcel; Nelson, Wendy A.; Macaya, Erasmo C.; Hay, Cameron H. (February 2020). Buschmann, A.. ed. "The Biogeographic Importance of Buoyancy in Macroalgae: A Case Study of the Southern Bull‐Kelp Genus Durvillaea (Phaeophyceae), Including Descriptions of Two New Species 1" (in en). Journal of Phycology 56 (1): 23–36. doi:10.1111/jpy.12939. ISSN 0022-3646. PMID 31642057. 
  22. ↑ Macaya, E. C.; Zuccarello, G. C. (2010-12-16). "Genetic structure of the giant kelp Macrocystis pyrifera along the southeastern Pacific" (in en). Marine Ecology Progress Series 420: 103–112. doi:10.3354/meps08893. ISSN 0171-8630. Bibcode: 2010MEPS..420..103M. 
  23. ↑ Fraser, Ceridwen I.; McGaughran, Angela; Chuah, Aaron; Waters, Jonathan M. (August 2016). "The importance of replicating genomic analyses to verify phylogenetic signal for recently evolved lineages" (in en). Molecular Ecology 25 (15): 3683–3695. doi:10.1111/mec.13708. ISSN 0962-1083. PMID 27238591. 
  24. ↑ Pessarrodona, A.; Assis, J.; Filbee-Dexter, K.; Burrows, M. T.; Gattuso, J-P.; Duarte, C. M.; Krause-Jensen, D.; Moore, P. J. et al. (23 July 2020). "Global Seaweed Productivity". Science Advances 8 (37): eabn2465. doi:10.1126/sciadv.abn2465. PMID 36103524. 
  25. ↑ Abdullah, M.I., Fredriksen, S., 2004. Production, respiration and exudation of dissolved organic matter by the kelp Laminaria hyperborea along the west coast of Norway. Journal of the Marine Biological Association of the UK 84: 887.
  26. ↑ Rinde, E., 2009. Dokumentasjon av modellerte marine Naturtyper i DNs Naturbase. Førstegenerasjonsmodeller til kommunenes startpakker for kartlegging av marine naturtyper 2007. NIVA report, 32 pp.
  27. ↑ Christie, H., Jørgensen, N.M., Norderhaug, K.M., Waage-Nielsen, E., 2003. Species distribution and habitat exploitation of fauna associated with kelp (Laminaria hyperborea) along the Norwegian coast. Journal of the Marine Biological Association of the UK 83, 687-699.
  28. ↑ Jørgensen, N.M., Christie, H., 2003. l Diurnal, horizontal and vertical dispersal of kelp associated fauna. Hydrobiologia 50, 69-76.
  29. ↑ Norderhaug, K.M., Christie, H., Rinde, E., 2002. Colonisation of kelp imitations by epiphyte and holdfast fauna; a study of mobility patterns. Marine Biology 141, 965-973.
  30. ↑ Norderhaug, K.M., Christie, H., 2009. Sea urchin grazing and kelp re-vegetation in the NE Atlantic. Marine Biology Research 5, 515-528.
  31. ↑ Clow, Archibald; Clow, Nan L. (1952). Chemical Revolution. Ayer Co Pub. pp. 65–90. ISBN 978-0-8369-1909-7. OCLC 243798097. https://archive.org/details/chemicalrevoluti0000clow/page/65. 
  32. ↑ Jonathan Pereira, Fred B. Kilmer, The Elements of Materia Medica and Therapeutics, Volume 1, 1854, p. 558
  33. ↑ Edward C. C. Stanford, Wentworth L. Scott, ‘The Economic Applications of Seaweed’, February 14, 1862, Journal of the Royal Society of Arts, Vol 10, No. 482, 185-199
  34. ↑ John J. McKetta Jr. Taylor & Francis, Encyclopaedia of Chemical Processing and Design: Volume 27 - Hydrogen Cyanide to Ketones Dimethyl (Acetone), 1988, p. 283
  35. ↑ Brownlee, Iain A.; Seal, Chris J.; Wilcox, Matthew; Dettmar, Peter W.; Pearson, Jeff P. (2009). "Applications of Alginates in Food". in Rehm, Bernd H. A. (in en). Alginates: Biology and Applications. Microbiology Monographs. 13. Springer Berlin Heidelberg. pp. 211–228. doi:10.1007/978-3-540-92679-5_9. ISBN 9783540926795. https://www.researchgate.net/publication/225729229. Retrieved 2019-01-25. 
  36. ↑ Uzunović, Alija; Mehmedagić, Aida; Lačević, Amela; Vranić, Edina (2004-11-20). "Formulation ingredients for toothpastes and mouthwashes" (in en-US). Bosnian Journal of Basic Medical Sciences 4 (4): 51–58. doi:10.17305/bjbms.2004.3362. ISSN 1840-4812. PMID 15628997. 
  37. ↑ Rychen, Guido; Aquilina, Gabriele; Azimonti, Giovanna; Bampidis, Vasileios; Bastos, Maria de Lourdes; Bories, Georges; Chesson, Andrew; Cocconcelli, Pier Sandro et al. (2017). "Safety and efficacy of sodium and potassium alginate for pets, other non food-producing animals and fish" (in en). EFSA Journal 15 (7): e04945. doi:10.2903/j.efsa.2017.4945. ISSN 1831-4732. PMID 32625597. 
  38. ↑ Powers, John M. Powers. Craig's Restorative Dental Materials, 12th Edition. C.V. Mosby, 022006. p. 270
  39. ↑ Kazuko, Emi: Japanese Cooking, p. 78, Hermes House, 2002, p. 78. ISBN:0-681-32327-2
  40. ↑ Graimes, Nicola: The Best-Ever Vegetarian Cookbook, Barnes & Noble Books, 1999, p. 59. ISBN:0-7607-1740-0
  41. ↑ "Features of the Far Eastern cuisine". https://www.eastrussia.ru/eng/features-of-the-far-eastern-cuisine/. 
  42. ↑ Iodine Helps Kelp Fight Free Radicals and May Aid Humans, Too Newswise, Retrieved on July 8, 2008.
  43. ↑ Leung, Angela M.; Braverman, Lewis E. (March 2014). "Consequences of excess iodine" (in en). Nature Reviews Endocrinology 10 (3): 136–142. doi:10.1038/nrendo.2013.251. PMID 24342882. PMC 3976240. https://doi.org/10.1038/nrendo.2013.251. 
  44. ↑ "Is Seaweed The Answer To A Dieter's Prayer?". Sky News. March 22, 2010. http://news.sky.com/skynews/Home/UK-News/Seaweed-May-Fight-Obesity-Could-Alginates-Be-The-Answer-To-A-Dieters-Prayer/Article/201003415579083. 
  45. ↑ Miller, Eric P.; Auerbach, Hendrik; Schünemann, Volker; Tymon, Teresa; Carrano, Carl J. (20 April 2016). "Surface binding, localization and storage of iron in the giant kelp Macrocystis pyrifera" (in en). Metallomics 8 (4): 403–411. doi:10.1039/C6MT00027D. ISSN 1756-591X. PMID 27009567. 
  46. ↑ J. M. Bumsted, The People's Clearance: Highland Emigration to British North America, 1770-1815, 1981
  47. ↑ [1] allwords.com definition for "Kelper",
  48. ↑ [2] dictionary.com definition for "Kelper"
  49. ↑ Dayton, P.K. 1985a. Ecology of kelp communities. Annual Review of Ecology and Systematics 16: 215-245.
  50. ↑ Sala, E., C.F. Bourdouresque and M. Harmelin-Vivien. 1998. Fishing, trophic cascades, and the structure of algal assemblages: evaluation of an old but untested paradigm. Oikos 82: 425-439.
  51. ↑ Planet, Team (2012-01-12). "Green Glossary: Kelp Forests: Other Marine Life: Animal Planet". Animals.howstuffworks.com. http://animals.howstuffworks.com/marine-life/green-glossary-kelp-forest.htm. 
  52. ↑ AlgaeBase Laminariales
  53. ↑ "Dabberlocks (Alaria esculenta)". https://www.marlin.ac.uk/species/detail/1291. 

Further reading

  • Druehl, L.D. 1988. Cultivated edible kelp. in Algae and Human Affairs. Lembi, C.A. and Waaland, J.R. (Editors) 1988.ISBN:0 521 32115 8.
  • Erlandson, J.M., M.H. Graham, B.J. Bourque, D. Corbett, J.A. Estes, & R.S. Steneck. 2007. The Kelp Highway hypothesis: marine ecology, the coastal migration theory, and the peopling of the Americas. Journal of Island and Coastal Archaeology 2:161-174.
  • Eger, A. M., Layton, C., McHugh, T. A, Gleason, M., and Eddy, N. (2022). Kelp Restoration Guidebook: Lessons Learned from Kelp Projects Around the World. The Nature Conservancy, Arlington, VA, USA.

External links

Wikidata ☰ Q1055316 entry



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