scholarly journals STUDY OF GROWTH PATTERN AND PHENOLOGY OF Dipterocarpus zeylanicus FROM TWO FOREST RESERVES OF SRI LANKA

2013 ◽  
Vol 0 (0) ◽  
Author(s):  
M. P. De Silva
Keyword(s):  
Sri Lanka ◽  
Growth Pattern ◽  
Forest Reserves

Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions

Phytotaxa ◽  
2017 ◽  
Vol 308 (1) ◽  
pp. 37
Author(s):  
W.A.M.P. ARIYARATHNE ◽  
DEEPTHI YAKANDAWALA ◽  
ROSABELLE SAMUEL ◽  
SIRIL WIJESUNDARA
Keyword(s):  
Sri Lanka ◽  
Hot Spot ◽  
Conservation Status ◽  
Current Status ◽  
Large Contribution ◽  
Sri Lankan ◽  
Conservation Areas ◽  
Forest Reserves ◽  
Available Information ◽  
Red Listing

Sri Lanka is a country with unique landscapes and positioning. Its land profile varies from coastal areas through lowland hills to central montane region, and the climatic zones governed by seasonal monsoons results in a significantly high biodiversity.         Sri Lanka together with Western Ghats is a biodiversity hot spot among the 35 regions known worldwide. Sri Lanka harbors 3154 species of which 894 are endemics belonging to different angiosperm families. The orchid flora of the country, with 189 known species including 55 endemics is one that contributes very much for this high endemism. However 70.6% are currently listed as nationally threatened species during National Red listing in 2012.         The present study was conducted to investigate the current status and occurrence of species of the family Orchidaceae within and outside the conservation areas including few unexplored/ undocumented regions in the country. Field visits were carried out mainly focusing on the flowering seasons. Fourteen different sites including Forest Reserves, Sanctuaries, Strict Nature Reserves and Wildlife Parks were taken into consideration during this study. Observations were made in the field and locations recorded, collected data were tabulated and compared with available information. The observation made during the present study would make a large contribution for updating the conservation status of orchids at national and global level red listing.

scholarly journals Diversity, Length-Weight Relations, and Condition Factor of Sea Cucumbers in Three Coastal Areas Along the Southern Coast of Sri Lanka: A Case Study

2021 ◽  
Vol 21 (12) ◽  
pp. 575-588
Author(s):  
Lalith Kumara Thiththagalle Gamage ◽  
Gajahin Gamage Nadeeka Thushari ◽  
Keerthi Sri Senevirathna Atapaththu ◽  
Rasika Sampath Kumara Hewa Kondaramage ◽  
Jayan Duminda Mahesh Senevirathna
Keyword(s):  
Sri Lanka ◽  
Growth Pattern ◽  
Sea Cucumber ◽  
Management Practices ◽  
Condition Factor ◽  
Sampling Technique ◽  
Systematic Sampling ◽  
Least Squares Regression ◽  
Southern Coast ◽  
Holothuria Atra

Economically and ecologically important ecosystems that consist of diverse finfish and shellfish resources are found along the southern coast of Sri Lanka. Thus, the current study intends in assessing the species diversity, length-weight (L-W) relationships, and condition factor of sea cucumber stocks in selected coastal sites of southern Sri Lanka. The diversity of sea cucumber species was surveyed using the systematic sampling technique in three selected sites (Bandaramulla, Mirissa, and Weligama) during February-December 2019. The growth pattern of each species was identified using a least-squares regression model computed for length-weight relationships. Fulton’s condition factor (K) was analysed for each species. There were four common sea cucumber species (Holothuria atra - Lolly Fish, Bohadschia marmorata - White Thread fish, Actinipyga miliaris- Deep Water Blackfish, and Thelenota ananas- Prickly Redfish) in study sites, while Holothuria atra and Bohadschia marmorata were recorded as the most abundant species. The length-weight relationship derived for the above four species exhibited a negative allometric growth pattern (“b” < “3”), indicating faster length increment compared to weight. The habitat qualities of all sea cucumber species were in optimum environmental condition. Our findings would benefit as baseline data for implementing sustainable management practices of sea cucumber resources.

scholarly journals Mapping Land Cover Change over a 25-Year Period (1993–2018) in Sri Lanka Using Landsat Time-Series

Land ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 27 ◽  
Author(s):  
Chithrangani WM Rathnayake ◽  
Simon Jones ◽  
Mariela Soto-Berelov
Keyword(s):  
Time Series ◽  
Sri Lanka ◽  
Land Cover ◽  
Land Cover Change ◽  
Vegetation Index ◽  
Detection Algorithm ◽  
Economic Stability ◽  
Change Analysis ◽  
Forest Reserves ◽  
Normalised Difference Vegetation Index

Land use and land cover change (LULCC) are dynamic over time and space due to human and biophysical factors. Accurate and up-to-date LULCC information is a mandatory part of environmental change analysis and natural resource management. In Sri Lanka, there is a significant temporal gap in the existing LULCC information due to the civil war that took place from 1983 to 2009. In order to fill this gap, this study presents a whole-country LULCC map for Sri Lanka over a 25-year period using Landsat time-series imagery from 1993 to 2018. The LandTrendr change detection algorithm, utilising the normalised burn ratio (NBR) and normalised difference vegetation index (NDVI), was used to develop spectral trajectories over this time period. A land cover change and disturbance map was created with random forest, using 2117 manually interpreted reference pixels, of which 75% were used for training and 25% for validation. The model achieved an overall accuracy of 94.14%. The study found that 890,003.52 hectares (ha) (13.5%) of the land has changed, while 72,266.31 ha (1%) was disturbed (but not permanently changed) over the last 25 years. LULCC was found to concentrate on two distinct periods (2000 to 2004 and 2010 to 2018) when social and economic stability allowed greater land clearing and investment opportunities. In addition, LULCC was found to impact forest reserves and protected areas. This new set of Sri Lanka-wide land cover information describing change and disturbance may provide a reference point for policy makers and other stakeholders to aid in decision making and for planning purposes.

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

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

Prevalence of Suicidal Ideation in Sri Lanka

Crisis ◽  
2010 ◽  
Vol 31 (1) ◽  
pp. 30-35 ◽  
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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