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A comprehensive study on ecological insights of Ulva lactuca seaweed bloom in a lagoon along the southeast coast of India.

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Title A comprehensive study on ecological insights of Ulva lactuca seaweed bloom in a lagoon along the southeast coast of India.
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Creator Nila Rekha, P., Nishan Raja, R., Jayakumar, R., Aravind, R., Ambasankar, K., Aravind Kumar, S., Balasubramanian, C.P., and Kuldeep, K. Lal. (2023).
 
Subject seaweed, Ulva lactuca
 
Description Not Available
Ulva lactuca, commonly known as sea lettuce is a green macroalgae (chlorophyta) and its uncontrolled proliferation
forms a bloom, which causes ecological imbalances and adversely impacts brackishwater ecosystems.
Algal bloom can harm the environment and aquatic organisms, but it can also be beneficial if harvested and
utilized for industrial purposes. A massive bloom of green macroalgae was observed in the Muttukadu lagoon,
located along the southeast coast of India in the Bay of Bengal. A comprehensive study was taken up to assess the
spatial distribution, proximate, nutrients, minerals, heavy metals, and factors inducing the bloom. For this study,
high-resolution satellite images (Sentinel 2) were used. The spatial distribution of seaweed was mapped using
Floating Algae Index (FAI), Modified Floating Algae Index (MFAI), Normalized Difference Red Edge (NDRE)
Index and Seaweed Index (SI) models. Results were validated using the MAVIC 3 pro drone and field survey. The
SI model was found to be more accurate compared to other models. The bloom exhibited notable temporal
dynamics, with peak coverage observed in the last week of May 2023 with a spread area of about 100.05 ha, the
bloom intensity was found to be high till the last week of June 2023, after which it gradually declined. The
proximate composition (%) of Ulva lactuca showed the moisture content is about 80.00 ± 2.98, crude protein
24.17 ± 1.80, crude lipid 0.81 ± 0.05, Total Ash 37.45 ± 1.44, Fiber (8.92 ± 0.41), and Acid Insoluble Ash
(16.18 ± 1.16). The mineral concentration was in the order Ca > Na > Mg > K > P. Iron (Fe) was observed to be
high compared to other micronutrients, with a concentration of 1164.40 mg/kg. Rich nutrients and low heavy
metal concentration significantly can boost the selling cost of Ulva lactuca providing livelihood support for the
coastal fisherfolk.
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Date 2024-03-01T16:35:03Z
2024-03-01T16:35:03Z
2023-09-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/81547
 
Language English
 
Relation Not Available;
 
Publisher Not Available