Sea Weeds

Order of the National Green Tribunal regarding discharge of untreated water into Jadhav Sagar, Sakhya Sagar and Madhav Sagar lake, Shivpuri, Madhya Pradesh, 19/11/2024

Order of the National Green Tribunal (Central Zone Bench, Bhopal) in the matter of Jagrat Agarwal & Others Vs MoEF&CC & Others dated 19/11/2024. The issue of discharge of untreated water into the waterbody, encroachment on the waterbody and dumping of the municipal solid waste was raised in the application …

Cascading predator effects in a Fijian coral reef ecosystem

Coral reefs are among Earth’s best-studied ecosystems, yet the degree to which large predators influence the ecology of coral reefs remains an open and contentious question. Recent studies indicate the consumptive effects of large reef predators are too diffuse to elicit trophic cascades. Here, we provide evidence that such predators …

Kenyan Entrepreneur Turns Invasive Weed Into Profit

An innovator at Kenya’s Lake Victoria has turned an invasion of water hyacinth into a business opportunity, making paper from the weed that he sells in local shops. The initiative is creating jobs and supporting environmental sustainability. Michael Otieno began making paper from water hyacinth ten years ago. The flowering …

Seaweed forests could help power tropical islands

Harvesting seaweed 'forests' and feeding them into large underwater digesters could one day meet the world's energy needs, with nine per cent of the ocean floor being enough to replace fossil fuels entirely, according to an ambitious idea. Even a more immediate and realistic use of seaweed — a major …

Ocean acidification causes ecosystem shifts via altered competitive interactions

Ocean acidification can alter competitive dynamics between species. Although calcareous species recruited and grew at similar rates to fleshy seaweeds in ambient and low pH conditions, at later stages, in low pH, they were rapidly overgrown. These results suggest that changes in competitive balance could indirectly lead to profound ecosystem …

State to promote seaweed cultivation

Gandhinagar:In an oblique attempt to keep its vegetarian banner high, the Gujarat government is meandering into a so far unexplored area to fight higher malnutrition levels. Well-placed Sachivalaya sources said the government is working out a complete plan of seaweed cultivation. Small farmers living next to the sea shore can …

Contrasting geographical distributions as a result of thermal tolerance and long-distance dispersal in two allegedly widespread tropical brown algae

Many tropical marine macroalgae are reported from all three ocean basins, though these very wide distributions may simply be an artifact resulting from inadequate taxonomy that fails to take into account cryptic diversity. Alternatively, pantropical distributions challenge the belief of limited intrinsic dispersal capacity of marine seaweeds and the effectiveness …

An engineered microbial platform for direct biofuel production from brown macroalgae

Prospecting macroalgae (seaweeds) as feedstocks for bioconversion into biofuels and commodity chemical compounds is limited primarily by the availability of tractable microorganisms that can metabolize alginate polysaccharides. Here, we present the discovery of a 36–kilo–base pair DNA fragment from Vibrio splendidus encoding enzymes for alginate transport and metabolism. The genomic …

Invasive seaweed poses threat to coral colonies in Gulf of Mannar

bio-invasion:The exotic seaweed seen on Krusadai Island. CHENNAI: Coral colonies in the Gulf of Mannar Biosphere Reserve are facing serious threat from an invasive seaweed, which is spreading rapidly, say marine researchers, who are worried about the phenomenon. The bio-invasion by the sea weed, Kappaphycus alvarezii, was spread over only …

Grow seaweeds to save marine life

Raja | ENS THE Gulf of Mannar National Marine Park authorities have decided to raise eco-friendly seaweeds to protect marine wealth as well as marine organisms. A large quantity of seaweeds are located in Rameswaram, Pamban, Mandapam, Valinokkam, Periyapattinam, Keelakarai, Devipattinam among other areas. According to experts, seaweeds including gracilaria …

Soon, green fuel for Indian cars?

Vijaysinh Parmar | TNN Bhavnagar: In a major ecofriendly step towards renewable energy generation in India, seaweed sourced ethanol (ethyl alcohol), a biofuel additive in transport fuel, has been used to run a car for the first time. Central Salt and Marine Chemicals Research Institute (CSMCRI) in Bhavnagar scientists recently …

Enhanced yield and nutritional quality in green gram (Phaseolus radiata L) treated with seaweed (Kappaphycus alvarezii) extract

This study presents foliar application effect of Kappaphycus alvarezii (5-15%) extract on yield and seed quality of greengram at flowering stage. Application of K. alvarezii (conc. 10.0%) significantly increased seed yield (30.11%) compared to control,due to increase in yield of pods, weight of pods as well as seed yield per …

Chemically rich seaweeds poison corals when not controlled by herbivores

Coral reefs are in dramatic global decline, with seaweeds commonly replacing corals. It is unclear, however, whether seaweeds harm corals directly or colonize opportunistically following their decline and then suppress coral recruitment. In the Caribbean and tropical Pacific, we show that, when protected from herbivores, ~40 to 70% of common …

Seaweed cultivation helps in reducing impact of global warming: expert

J. Praveen Paul Joseph Tuticorin: Seaweed cultivation reduces impact of global warming, as it has the ability to absorb carbon dioxide, according to M. Sakthivel, president, Aquaculture Foundation of India, Chennai. Seaweeds containing 62 minerals and having medicinal values is a wonder plant of the sea. Seaweed is presumably pervasive …

A comparative study of heavy metal concentrations in red seaweeds from different coastal areas of Karachi, Arabian sea

Comparative study of heavy metals in forty species of red seaweed belonging to twenty six genera from three different coastal areas (Buleji, Paradise Point and Nathia Gali) of Karachi, Arabian Sea was carried out over the period of three years. There is high variability in metals concentration with in, seaweed …

Effect of salinity and dissolved nutrients on the occurrence of some seaweeds in Manakkudy estuary

Manakkudy estuary, located on the South-West coast of India has production of seaweeds to an amount of 15.59 kg/m2/yr. Four different types of seaweeds viz., Chaetomorpha aerea, Enteromorpha compressa, Gracilaria verrucosa and Hypnea musciformis were observed in this estuary. Highest production of biomass (C. aerea = 842.33

Science & Technology - Briefs

environmental sciences Foster care The large blue butterfly, Maculinea arion, knows how to fool ants into raising their caterpillars. But when the ant, Myrmica sabuleti, disappear there survival is at stake, a study has shown. The butterfly lays eggs on thyme flowers and the caterpillars fall on the ground after …

Seaweed cultivation: A new source of income

Hrusikesh Mohanty / Berhampur July 1, 2009, 0:41 IST For the first time in Orissa, seaweed cultivation has started on an experimental basis. Red algae, a seaweed and a potential source of the phycocolloid agar, has been cultivated in Langaleswar village near Khallikote, off Ganjam coast with the involvement of …

Livelihood and the ecosystem

Kappaphycus Alvarezii is a source of livelihood in the Gulf of Mannar region, but with speculation that it might be bio-invasive, the onus lies with the Government of TamilNadu to strike the right balance.

Seaweed cultivation takes roots in Ganjam

BERHAMPUR: More than 10,000 families in Philippines earn their daily bread through seaweed farming. Seaweed cultivation can reap similar fruits in the coastal district of Ganjam where a large population, along the coasts, depends on fishing and its related activities. To achieve this target in India, Science and Society Division, …

Seaweed invader elicits angst in India

An effort in southern India to raise coastal farmers out of poverty by paying them to cultivate red algae for a food additive has gone awry.

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