CONSERVATION OF BIODIVERSITY IN MANGROVE ECOSYSTEM IN SRI LANKA

Endolichenic fungi (ELF) serve as a novel source of natural products with distinctive bioactivities. A total of 58 ELF isolated from 29 lichens collected from mangrove and mangrove-associated plants of Negombo lagoon, Sri Lanka were identified using morphological and DNA barcoding techniques. Ethyl acetate extracts of 18 such identified ELF isolates were subjected to in vitro assays to determine antioxidant, anti-inflammatory, tyrosinase inhibitory and antibacterial potency. Liquid chromatography–mass spectrometry (LC–MS) dereplication was conducted on the crude extracts in order to detect the secondary metabolites present. The extracts of Daldinia eschscholtzii and Hypoxylon lividipigmentum had the highest radical scavenging activity with SC50 values 14.27 ± 0.24 µg/mL and 18.34 ± 1.37 µg/mL, respectively. D. eschscholtzii also exhibited remarkable anti-inflammatory activity (IC50 7.97 ± 0.09 µg/mL). Tyrosinase inhibitory activity was highest in Cytospora xylocarpi (IC50 68.50 ± 0.34 µg/mL), while the highest activity against aerobic bacterial species Escherichia coli, Bacillus subtilis, Staphylococcus aureus and the anaerobic bacterial strain Streptococcus mutans was observed in the extracts of Xylaria feegenesis and Curvularia lunata. After a thorough study of the LC–MS profiles, it was found that the chemical profiles of Neofusicoccum occulatum, H. lividipigmentum and Myramaececium rubricosum were previously poorly explored in the literature.

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Atmospheric carbon removal capacity of a mangrove ecosystem in a micro-tidal basin estuary in Sri Lanka

Atmospheric Environment ◽

10.1016/j.atmosenv.2016.03.034 ◽

2016 ◽

Vol 134 ◽

pp. 121-128 ◽

Cited By ~ 4

Author(s):

K.A.R.S. Perera ◽

M.D. Amarasinghe

Keyword(s):

Sri Lanka ◽

Mangrove Ecosystem ◽

Tidal Basin ◽

Carbon Removal ◽

Removal Capacity ◽

Atmospheric Carbon

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Mangroves of Sri Lanka: Distribution, status and conservation requirements

Tropical Plant Research ◽

10.22271/tpr.2020.v7.i3.083 ◽

2020 ◽

Vol 7 (3) ◽

pp. 654-668

Author(s):

A. K. H. Priyashantha ◽

◽

T. Taufikurahman ◽

Keyword(s):

Sri Lanka ◽

Woody Plants ◽

Land Reclamation ◽

Anthropogenic Activities ◽

Mangrove Ecosystem ◽

Current Status ◽

Marine Systems ◽

The People ◽

Coastal Aquaculture ◽

Available Information

Mangroves are a diverse group of highly salt-tolerant woody plants, which grow in the inter-tidal zones in tropical and subtropical latitudes. Despite its unique services to the people, coastal and marine systems, mangroves have become one of the most rapidly disappearing ecosystems in the world. This paper reviews the available information on distribution, current status and challenges of mangroves in Sri Lanka. Today, around 160 km2 of mangrove vegetation is available in Sri Lanka and distributed mainly in Jaffna, Batticaloa, Kalpitiya, Rekawa and Trincomalee and is composed of 21 species of true mangroves and 24 species of mangrove associates. Mangroves in the island have been adversely affected due to the numerous anthropogenic activities, including land reclamation, tourism, coastal aquaculture and agriculture and other industrial activities etc. Proper conservations of mangroves are urgently required to the island to avoid further decline of mangrove ecosystem. It is imperative to evaluate policies, legal instruments and development strategies to effectively protect this valuable ecosystem.

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Economic Valuation of a Mangrove Ecosystem Threatened by Shrimp Aquaculture in Sri Lanka

Environmental Management ◽

10.1007/s00267-003-0286-9 ◽

2005 ◽

Vol 36 (4) ◽

pp. 535-550 ◽

Cited By ~ 64

Author(s):

M. Gunawardena ◽

J. S. Rowan

Keyword(s):

Sri Lanka ◽

Economic Valuation ◽

Mangrove Ecosystem ◽

Shrimp Aquaculture

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Identification of Novel Bioactive Compounds, Neurosporalol 1 and 2 from an Endolichenic Fungus, Neurospora ugadawe Inhabited in the Lichen Host, Graphis tsunodae Zahlbr. from Mangrove Ecosystem in Puttalam Lagoon, Sri Lanka

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23229 ◽

2021 ◽

Vol 33 (6) ◽

pp. 1425-1432

Author(s):

H.A.K. Maduranga ◽

W.R.H. Weerasinghe ◽

R.N. Attanayake ◽

S. Santhirasegaram ◽

C.D. Shevkar ◽

...

Keyword(s):

Sri Lanka ◽

Secondary Metabolites ◽

Mangrove Ecosystem ◽

Positive Control ◽

Mangrove Ecosystems ◽

Pure Compounds ◽

Endolichenic Fungus ◽

Endolichenic Fungi ◽

Anti Inflammatory ◽

Promising Source

Endolichenic fungi (ELF) have been recognized as a promising source of bioactive secondary metabolites. Sri Lanka, a biodiversity hotspot, harbours a remarkable diversity in mangrove ecosystems. In the present study, endolichenic fungi obtained from mangrove lichens of Puttalam lagoon were studied for their secondary metabolites. An endolichenic fungus, Neurospora ugadawe, isolated from the lichen host Graphis tsunodae Zahlbr. was identified up to the species level. Secondary metabolites of N. ugadawe were extracted into ethyl acetate and crude extract showed promising antioxidant and anti-inflammatory activities. Bioassay guided separation on silica gel column chromatography and preparative TLC were performed to isolate the bioactive pure compounds. Two novel bioactive pure compounds were identified as Neurosporalol 1 and Neurosporalol 2. Neurosporalol 1 showed the highest antioxidant activity compared with the positive control BHT. Further, this compound showed very low anti-inflammatory activity compared to that of the positive control aspirin. Neurosporalol 2 showed comparable antioxidant and moderate anti-inflammatory activities.

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Abstract #604: Detection of Cardiovascular Risk Factors by Anthropometric Measures in Adults Living in an Urban Setting in Sri Lanka

Endocrine Practice ◽

10.1016/s1530-891x(20)42668-0 ◽

2015 ◽

Vol 21 ◽

pp. 114-115

Author(s):

Kavinga Gunawardane ◽

Noel Somasundaram ◽

Neil Thalagala ◽

Pubudu Chulasiri ◽

Sudath Fernando

Keyword(s):

Risk Factors ◽

Cardiovascular Risk ◽

Sri Lanka ◽

Cardiovascular Risk Factors ◽

Urban Setting ◽

Anthropometric Measures

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Prevalence of Suicidal Ideation in Sri Lanka

Crisis ◽

10.1027/0227-5910/a000010 ◽

2010 ◽

Vol 31 (1) ◽

pp. 30-35 ◽

Cited By ~ 3

Author(s):

Sudath Samaraweera ◽

Athula Sumathipala ◽

Sisira Siribaddana ◽

S. Sivayogan ◽

Dinesh Bhugra

Keyword(s):

Suicidal Ideation ◽

Sri Lanka ◽

General Population ◽

Suicide Attempts ◽

National Average ◽

The West ◽

Suicide Methods ◽

Suicide Rates ◽

Completed Suicide ◽

The World

Background: Suicidal ideation can often lead to suicide attempts and completed suicide. Studies have shown that Sri Lanka has one of the highest rates of suicide in the world but so far no studies have looked at prevalence of suicidal ideation in a general population in Sri Lanka. Aims: We wanted to determine the prevalence of suicidal ideation by randomly selecting six Divisional Secretariats (Dss) out of 17 in one district. This district is known to have higher than national average rates of suicide. Methods: 808 participants were interviewed using Sinhala versions of GHQ-30 and Beck’s Scale for Suicidal Ideation. Of these, 387 (48%) were males, and 421 (52%) were female. Results: On Beck’s Scale for Suicidal Ideation, 29 individuals (4%) had active suicidal ideation and 23 (3%) had passive suicidal ideation. The active suicidal ideators were young, physically ill and had higher levels of helplessness and hopelessness. Conclusions: The prevalence of suicidal ideation in Sri Lanka is lower than reported from the West and yet suicide rates are higher. Further work must explore cultural and religious factors.

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Suicide on the Indian Subcontinent

Crisis ◽

10.1027//0227-5910.23.3.104 ◽

2002 ◽

Vol 23 (3) ◽

pp. 104-107 ◽

Cited By ~ 36

Author(s):

Murad M. Khan

Keyword(s):

Sri Lanka ◽

Mental Health Professionals ◽

Indian Subcontinent ◽

Interpersonal Relationship ◽

Public Health Problem ◽

Elderly Subjects ◽

Important Public Health Problem ◽

Policy Makers ◽

Formidable Challenge ◽

Causative Factors

Summary: The Indian subcontinent comprises eight countries (India, Pakistan, Bangladesh, Nepal, Sri Lanka, Afghanistan, Bhutan, and the Maldives) and a collective population of more than 1.3 billion people. 10% of the world's suicides (more than 100,000 people) take place in just three of these countries, viz. India, Sri Lanka, and Pakistan. There is very little information on suicides from the other four countries. Some differences from suicides in Western countries include the high use of organophosphate insecticides, larger numbers of married women, fewer elderly subjects, and interpersonal relationship problems and life events as important causative factors. There is need for more and better information regarding suicide in the countries of the Indian subcontinent. In particular, studies must address culture-specific risk factors associated with suicide in these countries. The prevention of this important public health problem in an area of the world with myriad socio-economic problems, meager resources, and stigmatization of mental illness poses a formidable challenge to mental health professionals, policy makers, and governments of these countries.

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