Jayatissa Loku Pulukkuttige

Jayatissa Loku Pulukkuttige
University of Ruhuna · Department of Botany

Doctor of Philosophy

About

60
Publications
29,520
Reads
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2,647
Citations
Citations since 2017
25 Research Items
1386 Citations
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2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Introduction
Currently researching in Plant ecology, Coastal Ecology, Environmental Science

Publications

Publications (60)
Article
1. Among the several threats to the conservation of mangrove ecosystems in most South Asian countries, shrimp farming is predominant. Since the introduction of shrimp farming in Sri Lanka in the 1980s, mangroves on the island’s north-western coast have been continually cleared to create new shrimp farms, leading to a decline in the social-ecologica...
Conference Paper
Full-text available
Mangrove restoration in Sri Lanka
Article
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Tropical lagoon ecosystems constituting lagoons with fringe mangroves are continually polluted with effluents from different sources. This study assessed the spatial variation of selected physicochemical parameters (pH, nitrates, phosphates, and conductivity) in water and sediments from the Chilaw lagoon and its fringe mangroves located on the Nort...
Conference Paper
Full-text available
Amongst the several mangrove forests present in Sri Lanka, those in the Puttalam district have suffered the highest level of degradation arising from human activities, particularly shrimp farming. The occurrence and spread of the White Spot Disease (WSD) on shrimps both in shrimp farms and natural waters of Sri Lanka during 1994-1995 caused the aba...
Article
Sri Lanka is at the forefront of global mangrove conservation. It is the first country to officially protect all its remaining mangrove forests and has embarked on an ambitious plan to restore 10,000 ha of wetland during the United Nations Decade of Ecosystem Restoration. One incentive for this conservation effort is a recognition, based on researc...
Poster
Full-text available
Amongst the several mangrove ecosystems present in Sri Lanka, the mangrove forests in the Puttalam district have suffered the greatest level of degradation arising from human activities, particularly shrimp farming. The occurrence and spread of the White Spot Disease (WSD) on shrimps in both shrimp farms and natural waters of Sri Lanka during 1994-...
Article
Full-text available
Sri Lanka is rich in a wide diversity of fruits, but many are underutilized by the people in Sri Lanka despite their nutritional value. This is mainly due to little awareness of the palatability of many fruits and hence low popularity in the market. The present study aimed at providing comparative data on the main biochemical and nutritional parame...
Article
Full-text available
While mangroves are increasingly described as social-ecological systems (SESs), performing SES research is so much more than merely documenting local resource utilisation patterns in case studies. The aim of this paper is to review and show how ecological, human and institutional resilience could be understood and fostered in an era of uncertainty,...
Article
Full-text available
The increase of freshwater inflow to Kalametiya lagoon, Sri Lanka, as a result of Udawalawe irrigation project that came into operation in 1967, has caused heavy siltation and reduction of salinity in the lagoon. The present investigation attempted to study and convey the current situation of Kalametiya lagoon and its future trajectory in response...
Article
Full-text available
ABSTRACT The increase of freshwater inflow to Kalametiya lagoon, Sri Lanka, as a result of Udawalawe irrigation project that came into operation in 1967, has caused heavy siltation and reduction of salinity in the lagoon. The present investigation attempted to study and convey the current situation of Kalametiya lagoon and its future trajectory in...
Article
The conservation of mangrove forests has become an important international policy priority in recent decades, and is mirrored by a large increase in research interest. Multiple disciplines now use mangroves as a study system, from molecular biology to social science. The variety of research conducted in mangroves is exemplified by the Mangrove Macr...
Article
Full-text available
The behaviour of carbohydrate metabolism in a plant, particularly its total starch content, total soluble sugar (TSS) content and their utilisation, is of great importance in coping with abiotic stress conditions. With this in mind, we studied total starch and TSS contents, survival, growth, biomass accumulation and stomatal conductance in Rhizopho...
Poster
Full-text available
Sri Lanka is a tropical country with a large diversity of fruits, including a number of utilized as well as underutilized species. Fruits are known to be associated with pharmacological properties, due to presence of large quantities of antioxidants and minerals such as dietary iron. As Non-Communicable Diseases are the major health risk locally an...
Conference Paper
Full-text available
Mangrove forests along the Sri Lankan coastline have extensively been studied although Garanduwa inland mangrove forest in the southern province received very little attention. Therefore, this study was conducted to investigate the species diversity, plant density and community structure in order to understand health of this inland mangrove. The la...
Article
Full-text available
Six wide-ranging mangrove species, Rhizophora apiculata, R. mucronata, Avicennia marina, A. officinalis, Bruguiera gymnorrhiza, and B. sexangula, were selected to study the growth and survival of seedlings under three contrasting salinity treatments over a 30-week period: low (3-5psu), moderate (15-17psu) and high (33-36psu). Seedlings grown under...
Article
Full-text available
Since the Indian Ocean tsunami on 26 December 2004, there have been continuous efforts to upgrade the (tsunami) early warning systems as well as their accessibility in local and regional places in South and Southeast Asia. Meanwhile, the protection offered by coastal vegetation like mangroves to the people, property and physical landscape was also...
Article
Full-text available
This study investigated the effectiveness of mangrove planting initiatives in Sri Lanka. All the lagoons and estuaries in Sri Lanka were included in the study. We documented all agencies and locations, involved in mangrove planting efforts, along with the major drivers of these planting initiatives, their extents, and the possible causes of the suc...
Article
Understanding the effects of seedling density on sediment accretion, biogeochemistry and belowground biomass in mangrove systems can help explain ecological functioning and inform appropriate planting densities during restoration or climate change mitigation programs. The objectives of this study were to examine: 1) impacts of mangrove seedling den...
Chapter
Full-text available
The magnitude and impacts of tsunamis and ocean surges are unpredictable. Careful examination of these events and their consequences provide an insight towards natural protection against these hazards; therefore better preparedness and disaster risk reduction are crucial in countries at risk. This paper attempts to demonstrate some of the lessons f...
Conference Paper
Full-text available
Mangrove restoration has been prioritized overall the world. Nevertheless, the restoration attempts show higher failure rates in many areas in the world. Therefore, the objective of this research was to study the impact of two common stress factors, physical drought i.e. water deficiency in soil and physiological drought i.e. difficulty in absorbin...
Conference Paper
Full-text available
Sri Lanka is one of the global biodiversity hotspots but the biodiversity of the country is highly affected by various factors. Based on the preliminary observations, Acacia auriculiformis has invaded in Rekawa lagoon region (06º03´N–80º50´E). Therefore, the main objective was to study the distribution and the abundance of A. auriculiformis at the...
Article
The expansion of shrimp aquaculture in Sri Lanka over the past three decades has dramatically changed the coastal landscape, in particular by converting mangrove forests. The current study quantified these impacts in the Puttalam lagoon, an area of the country that has experienced some of the most destructive development. Land use change was analys...
Article
Full-text available
Exacum trinervium (Gentianaceae) in Sri Lanka received a lot of attention in recent years because of its endemism, national conservation status and medicinal & ornamental values. Therefore several groups of scientists in Sri Lanka have attempted to introduce E. trinervium as an ornamental plant through ex-situ cultivation. However, the production o...
Article
Full-text available
Early life of viviparous mangroves merely depends on the propagule and it can be assumed that the period and the degree of dependency could depend on the size and the intrinsic factors of the propagule as well as on the edaphic and environmental factors in which the seedlings are growing. However scientific studies on the propagule dependency of ma...
Article
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Propagule dispersal of four mangrove species Rhizophora mucronata, R. apiculata, Ceriops tagal and Avicennia officinalis in the Pambala-Chilaw Lagoon Complex (Sri Lanka) was studied by combining a hydrodynamic model with species-specific knowledge on propagule dispersal behaviour. Propagule transport was simulated using a finite-volume advection-di...
Article
Full-text available
Propagule dispersal of four mangrove species Rhizophora mucronata, R. apiculata, Ceriops tagal and Avicennia officinalis in the Pambala-Chilaw Lagoon Complex (Sri Lanka) was studied by combining a hydrodynamic model with species-specific knowledge on propagule dispersal behaviour. Propagule transport was simulated using a finite-volume advection-di...
Conference Paper
Full-text available
Mangrove trees form unique forest at the edge of the land and sea. Amongst mangrove trees, the genus Avicennia L. stands out by successive cambia i.e. having not one cambial layer but subsequent active cambia and the organization of successive cambia seems to be very complex in three dimensional aspects and even in transverse sections. Further, sec...
Article
Full-text available
The early growth of seven species of true mangroves representing all the categories relevant to viviparity (i.e. true viviparous species, crypto viviparous species and non-viviparous species) and including pairs of species which are closely related as well as species commonly used in replanting, was studied in response to two contrasting salinity r...
Article
Tsunami affected areas of the east, south and west coasts of Sri Lanka were visited three times as 14 days, 44 days and 134 days after the tsunami that hit the country on 26th December, 2004 and examined non mangrove areas of the coasts for the damages on the vegetation. Based on physical and/or physiological damages, plants were placed into three...
Article
Full-text available
Whereas anthropogenic impacts on the mangroves are often directly visible, some indirect impacts like biodiversity change are witnessed only over a period of time and therefore require medium to long-term monitoring. This study focuses on testing the predictions made 10 yr ago concerning the evolution of a mangrove forest in Galle-Unawatuna, Sri La...
Article
Full-text available
Survival, growth, aboveground biomass accumulation, sediment surface elevation dynamics and nitrogen accumulation in sediments were studied in experimental treatments planted with four different densities (6.96, 3.26, 1.93 and 0.95 seedlings m(-2)) of the mangrove Rhizophora mucronata in Puttalam Lagoon, Sri Lanka. Measurements were taken over a pe...
Article
Full-text available
Long-term decadal retrospection in spatio-temporal imagery analyses can only be carried out using aerial photographs, which are still the most detailed remotely sensed data available. Visual interpretation of such imagery is most efficient and inexpensive in the light of ecosystem monitoring research in developing countries, which are often unable...
Article
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Mangroves are intertidal ecosystems that are particularly vulnerable to climate change. At the low tidal limits of their range, they face swamping by rising sea levels; at the high tidal limits, they face increasing stress from desiccation and high salinity. Facilitation theory may help guide mangrove management and restoration in the face of these...
Article
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Vegetated coastal ecosystems provide goods and services to billions of people. In the aftermath of a series of recent natural disasters, including the Indian Ocean Tsunami, Hurricane Katrina and Cyclone Nargis, coastal vegetation has been widely promoted for the purpose of reducing the impact of large storm surges and tsunami. In this paper, we rev...
Article
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Using the Web of Science® database (Institute of Science Information – ISI, Philadelphia, PA, USA) we analysed pre- (1972-2004) and post-tsunami (2005) clues about the protective buffer offered by mangroves and other coastal vegetation in peer-reviewed ISI-rated scientific literature. Apart from providing a literature review on the above topic, thi...
Article
Aegiceras corniculatum is a cryptoviviparous mangrove tree distributed in the Indo-West Pacific. The genetic structure of 13 populations of A. corniculatum from South China, Malay Peninsula, Sri Lanka, and North Australia, was assessed by amplified fragment length polymorphism (AFLP) markers. Our results showed a relatively high level of genetic va...
Article
Full-text available
The growth performance of seedlings of seven species of true mangroves (Avicennia marina, A. officinalis, Bruguiera gymnorrhiza, B. sexangula, Rhizophora apiculata, R. mucronata, and Sonneratia caseolaris) in response to two contrasting salinity regimes, low (i.e., 3–5) and medium (i.e., 25–27), was studied. Species represented all categories relev...
Article
Full-text available
Kahandamodara and Kalametiya are two estuarine lagoons located within about 12km distance along the Southern coast of Sri Lanka. According to a socio-economic survey, both lagoons have been moderately to high saline water bodies and the latter was an important center of prawn fishery until the late 1960s. Two irrigation projects upstream (Udawalawe...
Article
A previous pioneering study of freshwater bodies in Sri Lanka revealed the presence of toxic cyanobacteria in three out of four water bodies tested. It was therefore important to perform a more detailed investigation into the presence of cyanobacteria and their toxins throughout Sri Lanka. The country has a long history of well-planned water manage...
Article
Whether or not mangroves function as buffers against tsunamis is the subject of in-depth research, the importance of which has been neglected or underestimated before the recent killer tsunami struck. Our preliminary post-tsunami surveys of Sri Lankan mangrove sites with different degrees of degradation indicate that human activity exacerbated the...
Article
The increasing anthropogenic pressure on natural environments results in impacts that affect tropical forest areas and their biodiversity. Adverse impacts on terrestrial and oceanic environments often compound in the intertidal area, where mangrove forest ecosystems thrive. In tropical coastal areas of many developing countries where people depend...
Article
Full-text available
This paper is a preliminary report of the ability of IKONOS multispectral satellite imagery with a very high spatial resolution of 1 metre to distinguish two mangrove species in Sri Lanka belonging to the same genus (Rhizophora apiculata and R. mucronata). Not only is this an advancement for the monitoring of forests, it is even more important cons...
Article
Full-text available
According to some non-scholarly reports, Kalametiya lagoon (dry zone of southern Sri Lanka, formerly 8.9 km2, now 7.5 km2) had been a moderately or high salinity water body and a very important centre of prawn fishery until the late 1960s. Most of the lagoon area had remained open water until then. An upstream irrigation project, the Udawalawa irri...
Article
Full-text available
The mangrove vegetation of a disturbed and undisturbed site in bothKenya and Sri Lanka was investigated in the field for three vegetation layers:adult trees, young trees, and juvenile trees. A minimum of 25 sample points, inwhich the vegetation was described and environmental factors (salinity, lightintensity, land/water ratio, abundance of herbivo...
Article
Recently published reports list numbers and distributions of Sri Lankan mangrove species that outnumber the actual species present in the field. The present study serves to review this literature and highlight the causes of such apparently large species numbers, while providing an objective and realistic review of the mangrove species actually pres...
Article
Full-text available
This research deals mainly with the changes in land cover and their impact on the environment (the soil, the infiltration and drainage of water, evapotranspiration, flora and fauna) in and around Chilaw Lagoon, a Sri Lankan mangrove site. This requires research on the space-time dynamics in soil use and land cover to estimate and predict the human...

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