Feature Article

Many studies have tried to explain the physiological mechanisms of the alpine treeline phenomenon, but the debate on the alpine treeline formation remains controversial due to opposite results from different studies. The present study explored the carbon-physiology of an alpine shrub species (Quercus aquifolioides) grown at its upper elevational limit compared to lower elevations, to test whether the elevational limit of alpine shrubs (

Coral bleaching is the breakdown of symbiosis between coral animal hosts and their dinoflagellate algae symbionts in response to environmental stress. On large spatial scales, heat stress is the most common factor causing bleaching, which is predicted to increase in frequency and severity as the climate warms. There is evidence that the temperature threshold at which bleaching occurs varies with local environmental conditions and background climate conditions.

Increases in thermal variability elevate metabolic rate due to Jensen's inequality, and increased metabolic rate decreases the fitness of dormant ectotherms by increasing consumption of stored energy reserves. Theory predicts that ectotherms should respond to increased thermal variability by lowering the thermal sensitivity of metabolism, which will reduce the impact of the warm portion of thermal variability.

A substantial proportion of the world's living species, including one-third of the reef-building corals, are threatened with extinction and in pressing need of conservation action. In order to reduce biodiversity loss, it is important to consider species' contribution to evolutionary diversity along with their risk of extinction for the purpose of setting conservation priorities.

A maroon car, powered by fuel obtained from photosynthetic microorganisms, was flagged off for a test run by Union minister of Science and Technology and Earth Sciences, Vilasrao Deshmukh in New Delhi on March 30. The event brings alternative fuels from microorganisms closer to reality. With fossil fuels set to get exhausted in the next few hundred years and the spectre of global warming looming over the planet, the world is increasingly looking at alternative energy options.

Should solar thermal be preferred over photovoltaic solar power ? Concentrated solar power (CSP) or solar thermal technology is to be given substantial allocation in the second phase of the national solar mission (2013-2017). This was revealed by the joint secretary in the ministry of new and renewable energy, Tarun Kapoor, at the third concentrated solar thermal power summit on March 14, organised in Gurgaon. He stated that detailed plans would be revealed in the next few months. At the same time he admonished the industry.

Tensions continue to run high over the inclusion of aviation in the EU's Emissions Trading System (ETS), after Indian government officials confirmed last Thursday that New Delhi would be asking its airlines not to participate in the scheme. Meanwhile, the trade group representing the largest US airlines is now calling upon the White House to pursue a case against the Brussels plan at the International Civil Aviation Organization.

A large body of evidence has confirmed that the indoor air pollution (IAP) from biomass fuel use is a major cause of premature deaths, and acute and chronic diseases. Over 78% of Sri Lankans use biomass fuel for cooking, the major source of IAP in developing countries. We conducted a review of the available literature and data sources to profile biomass fuel use in Sri Lanka.