Reckless disregard

Sub : Env

Sec: Species in news

Context:

India is set to expand seaweed cultivation along its coastline by promoting Kappaphycus alvarezii, a known invasive species that has smothered coral reefs in the Gulf of Mannar over the past two decades.

About Kappaphycus alvarezii:

Kappaphycus alvarezii is a known invasive species that has already caused damage to coral reefs in Tamil Nadu’s Gulf of Mannar, where it was introduced for commercial cultivation two decades ago. Though valuable for producing carrageenan (an emulsifier used in foods, beverages, and medicines) and biostimulants (which enhance crop yields), its spread threatens local ecosystems.
It’s also known as elkhorn sea moss or cottonii.
It’s a large, robust seaweed that can grow up to 2 meters in length. It has a branching thallus structure and can vary in colour from greenish-brown to red to yellow.
Habitat: Naturally occurs in tropical marine waters, particularly in the Indo-Pacific region.
Economic importance:
- Major source of carrageenan, a widely used food additive and industrial polymer
- Extensively cultivated in many tropical countries for commercial purposes
Cultivation:
- One of the most important commercially cultivated seaweeds globally
- Relatively fast-growing and can be harvested every 6-8 weeks
Uses:
- Food industry: As a source of carrageenan for thickening and stabilizing foods
- Cosmetics: In various skincare and haircare products
- Pharmaceuticals: As an excipient in drug formulations
- Agriculture: As a bio-fertilizer and soil conditioner
Environmental concerns:
- In some areas where it’s been introduced for cultivation, it has become invasive
- Can potentially outcompete native species and alter marine ecosystems

Source: DTE