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Home Law & Policy

Seaweed Mission

February 12, 2021
in Law & Policy
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Seaweed Mission
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In News: To promote seaweed cultivation, Smt. Sitharaman proposed a Multipurpose Seaweed Park to be established in Tamil Nadu.

 About Seaweed Mission

  • For Commercial Farming & Value Addition of seaweeds to boost the national economy.
  • By an estimate, if seaweed cultivation is carried out in ~ 10 Million Hectares or 5% of the Exclusive Economic Zone (EEZ) of India it will generate employment to ~ 50 Million People.
  • TIFAC will demonstrate a model with other ministries for commercial farming & value addition of seaweeds.
  • Out of the global seaweed production of ~ 32 million tons fresh weight valued around 12 billion US dollars. China produces ~57 %, Indonesia ~28% followed by South Korea, whereas India is having a mere share of ~0.01-0.02%.
  • The Seaweed mission will be vital for
    • Establishing a new seaweed industry
    • Contribute to national Gross Domestic Product (GDP)
    • Ocean Productivity
    • Reduce Algal Blooms
    • Help in reduction of millions of tons of CO2
    • Creating a Healthier Ocean
    • Production of Bioethanol of upto 6.6 Billion Litres

What is Seaweed Farming?

Seaweed farming or kelp farming refers to the practice of cultivating and harvesting seaweed. In its simplest form, it consists of the management of naturally found batches

About seaweed

  • Seaweed or sea vegetables are forms of algae that grow in the sea. They’re a food source for ocean life and range in color from red to green to brown to black. 
  • Seaweed grows along rocky shorelines around the world, but it’s most commonly eaten in Asian countries such as Japan, Korea and China.
  • Seaweed are plant-like organisms, playing a key ecological role in coastal ecosystems: support of food web, coastal protection of erosion, bioremediation by removal of nitrogen or phosphate and possible pollutants and CO2 sequestration
  • Seaweeds are also called macro-algae. This distinguishes them from micro-algae (Cyanophyceae), which are microscopic in size, often unicellular, and are best known by the blue-green algae that sometimes bloom and contaminate rivers and streams.
  • Naturally growing seaweeds are often referred to as wild seaweeds, in contrast to seaweeds that are cultivated or farmed.

Classification of seaweeds

Seaweeds can be classified into three broad groups based on pigmentation: brown, red and green. Botanists refer to these broad groups as Phaeophyceae, Rhodophyceae and Chlorophyceae, respectively. 

  • Brown seaweeds are usually large, and range from the giant kelp that is often 20 m long, to thick, leather-like seaweeds from 2-4 m long, to smaller species 30-60 cm long. 
    • The main uses of brown seaweeds are as foods and as the raw material for the extraction of the hydrocolloid, alginate. 
    • The more useful brown seaweeds grow in cold waters in both the Northern and Southern Hemispheres. 
    • They thrive best in waters up to about 20°C. Brown seaweeds are found in warmer waters, but these are less suitable for alginate production and rarely used as food.
  • Red seaweeds are usually smaller, generally ranging from a few centimetres to about a metre in length; however, red seaweeds are not always red: they are sometimes purple, even brownish red, but they are still classified by botanists as Rhodophyceae because of other characteristics. 
    • The main uses of red seaweeds are as food and as sources of two hydrocolloids: agar and carrageenan. 
    • Useful red seaweeds are found in cold waters such as Nova Scotia (Canada) and southern Chile; in more temperate waters, such as the coasts of Morocco and Portugal; and in tropical waters, such as Indonesia and the Philippines.
  • Green seaweeds are also small, with a similar size range to the red seaweeds.

Seaweed species in India

  • The commercially exploited seaweed species in India mainly include Kappaphycus alvarezii, Gracilaria edulis, Gelidiella acerosa, Sargassum spp. and Turbinaria spp. Seaweeds are valued for commercial products such as Karrageenan and Agar besides being used for the production of polysaccharides, fertilizer, sludge and other high-value products such as nutraceuticals and cosmeceuticals for use against various lifestyle diseases

Seaweed Park in Tamil Nadu

  • Union Finance Minister, while presenting the Union Budget 2021. “Seaweed farming is an emerging sector with the potential to transform the lives of coastal communities 
  • It will provide large scale employment and additional income
  • Natural seaweed resources exist in abundance in the state’s Ramanathapuram, Thoothukudi and Pudukkottai districts
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Source: PIB
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