Essay on Harmful Aspects of Algae. Sometimes the excessive growth of algae in a mass, specially the planktons or floating ones, may cause undesirable effects. They form the water-bloom which may be harmful to the fish and other animals; or in water-reservoirs may cause pollution and hinder the process of filtration. Some may grow in abundance even in the salt beds and affect the quality of salt, in the crystal formation and in imparting a pink or red colour to it.
Sodium Laminarin sulphate extracted from Laminaria is an effective blood anticoagulents. Agar is used as Laxative. Extracts of Corallina and Durvillea are used for expelling worms. Green algae like Chlorella, Synococcus etc. Chlorella Chlamydomonas, Oscillatoria, Scenedesmus etc.
They provide surplus oxygen for aerobic decomposition by bacteria and fungi. Anabaena, Nostoc, Chara, Nitella etc. Blue green algae increase the soil fertility by fixing atmospheric nitrogen, e g.
All nitrogen fixing BGA are filamentous and contain specialized cells called heterocysls for nitrogen fixation. BGA are also used for reclamation of saline usar alkaline land. Large brown and Red algae are used as organic fertilizers. They are richer in K but poorer in N and P than the far manure.
In coasted area, sea weeds are directly ploughed as green manure for cultivation. Extracts of sea weeds are sold as liquid fertilizers. Algae are useful natural resource of many commercial products. The important algal products of industrial uses are alginates, carrageen and diatomite.
Agar or Agar-agar is a jelly-like complex polysaccharide phycocolloid stored in the cell wall of certain red algae Gelidium, Gracilaria, Gigartina etc. Agar extracted from these agarophytes used in various purposes. Agar is used in laboratories to solidify culture media.
Agar-agar is also used for preserving cooked fishes, sheep tongues, sizing of silk, making adhesive for plywood, in photographic industry, as a thickening material in the preparation of ice cream, malted milk, jelly candies, pastries, soups and sauces.
Analysis shows that the principal potential food material in agar is galactose and sulphate. Agar is sometimes used in place of pectin for making jams, jellies, marmalades and other preserves.
It is also used for making moulds for artificial leg, linoleum, artificial leather, silk and insulating material against heat and sound.
The cell wall of brown algae sea weeds contains cellulose like strengthening material called algin. Chemically, algin is the calcium salts of alginic acid a phycocolloid. Alginates are the salts of alginic acid derived from the cell wall of brown algae like Fucus, Laminaria, Macrocystis, Lessonia etc.
These are gelatinous and substance used as thickener in shampoos, tooth pastes, cosmetics, ice cream, paints etc.
Alginates are also used in the production of plastics, flame proof fabrics, security glass, latex, capsules, typewriter rollers, non-inflammable wrapping film etc.
Alginates can prevent bleeding, so used in surgical threads and gauzes. Products of alginic acid are used in walking machine belts, sausage skins, tooth brush and dusting powder. It is a sulphated phycocolloid, similar to agar, found in the cell wall of red algae like Chondrus crispus Irish mossGigartina, Eucheuma etc.
It has been used as stabilizer or emulsifier in foods such as ice cream, other milk products and relishes. It is used as a binder in tooth paste or in pharmaceutical products, as well as an agent in ulcer therapy.
Carrageen has been found useful in finishing leather textile and paper industries. It is used as a thickening agent in shaving creams and lotions, and in the soap industry. It is also used to thicken sauces and soups, or fresh salads.
It is a rock like deposit of siliceous frustules cell wall of fossilized diatoms. Diatomite is used in the preparation of explosives, cement, bleaching powder, cosmetics, chocolates, metal polish, automobile polish and shoe polish.
They are also used in insulation of refrigerators, boilers, furnaces and pipes in packing corrosive chemicals, constructing of sound proof-rooms, light bricks, filter for oil, liquors and sugar refining.
In water reservoirs, sufficient nutrient availability results in luxuriant growth of algae that float on water surface in masses and look like foam or soap lather. These algal masses are called water bloom.
Some common water blooming algae are Anabaena, Oscillatoria, Microcystis. Water blooms cause oxygen depletion in the water of reservoirs thus causing death of aquatic animals present in the water.
Some of the bloom forming algae also produces toxins which sometimes prove fatal to the aquatic as well as domestic animals consuming that water. Blooms of dinoflagellates like Gymnodinium and Gonyaulax form red tides in sea.Apr 23, · The effects of temperature and nutrients on the growth and dynamics of toxic and non-toxic strains of Microcystis during cyanobacteria blooms.
Harmful Algae. ; – Alternatively, toxin-producing algae can directly affect marine species, by excretion of harmful compounds, and human health, by consumption of seafood containing such toxic compounds. However, once a non-indigenous toxic species has established itself in the marine ecosystem, such negative effects may be controlled .
Sanna Suikkanen, Giovana O. Fistarol and Edna Granéli, Allelopathic effects of the Baltic cyanobacteria Nodularia spumdigena, Aphanizomenon flos-aquae and Anabaena lemmermannii on algal monocultures, Journal of Experimental Marine Biology and Ecology, , 1, (85), ().
|An analysis of the harmful effects of toxic algae in marine biology||Sep Pagination or Media Count: Blooms of toxic or harmful microalgae, commonly called red tides, represent a significant - and expanding threat to human health and fisheries resources throughout the United States and the world.|
|An analysis of the harmful effects of toxic algae in marine biology||Click on the image to see a larger version.|
|Marine algal toxins: origins, health effects, and their increased occurrence.||Blooming[ edit ] Algal blooms can present problems for ecosystems and human society.|
|An analysis of the harmful effects of toxic algae in marine biology An analysis of the harmful effects of toxic algae in marine biology The following links exit the an analysis of antigone and her beliefs in obeying gods rules site Exit. Cyanobacteria are found almost everywhere, but particularly in lakes and in the ocean where, under certain conditions, they reproduce exponentially to form blooms.|
Blooms of toxic or harmful microalgae, commonly called red tides, represent a significant - and expanding threat to human health and fisheries resources throughout the United States and the world.
These phenomena take many forms, ranging from massive accumulations of cells that discolor the water to dilute, inconspicuous, but highly toxic . An Analysis of the Harmful Effects of Toxic Algae in Marine Biology PAGES 2. More essays like this: marine biology, toxic algae, harmful algal blooms.
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genus Gambierdiscus that are among the well known harmful algae. A. catenella is a .