Wednesday, March 28, 2012
Friday, March 16, 2012
The DEEPSEA CHALLENGE Expedition..
Location : Marina Trench,Challenger Deep. Depth : 11,000 m.
Pressure : 1000 atmospheres.
At the frigid bottoms of Earth’s ocean trenches, scientists have discovered life-forms where they once thought none could survive. From gelatinous animals called holothurians to shrimp-like creatures named amphipods, the animals of the deep can quickly start to resemble alien beings. But they live here, on planet Earth.Scientists are particularly interested in the microorganisms that may be found in the Challenger Deep. Analyzing how deep-sea microbes survive could impact biomedicine and biotechnology.They also can feed upon hydrocarbons such as methane or various oils. Some of these creatures have membranes high in omega-3 fatty acids, which prevent the animals from freezing. Studying everything from how their membranes operate to how they replicate their DNA could lead to more discoveriesStudying life in the extreme environment of the Challenger Deep could also provide insight into how life might survive on other planets. The cold, high-pressure, low-to-no-light conditions of the Mariana Trench are similar in some respects to conditions thought to exist elsewhere in the solar system, such as on some icy moons of Jupiter and Saturn. The temperature and pressure conditions at the Challenger Deep are comparable to what scientists think any life would have to tolerate deep within Europa’s ocean.
Inflation seen to moderate
The Economic Survey has projected that, barring unexpected shocks, headline inflation would ease to 6.5-7 per cent by the end of this fiscal and moderate further in the coming months although spiralling global crude oil prices continue to pose a challenge. The Survey expects moderation in inflation to continue during the course of 2012-13 on account of tightening of monetary policy by the Reserve Bank of India and other measures. The Survey said the gap between wholesale price index and consumer price index inflation had significantly narrowed due to drastic fall in food inflation.
Sunday, August 7, 2011
ClouD ForesT..
A cloud forest, also called a fog forest, is a generally tropical or subtropical evergreen montane moist forest characterized by a persistent, frequent or seasonal low-level cloud cover, usually at the canopy level. Cloud forests often exhibit an abundance of mosses covering the ground and vegetation, in which case they are also referred to as mossy forests. Mossy forests usually develop on the saddles of mountains, where moisture introduced by settling clouds is more effectively retaine.Only 1% of the global woodland is covered by cloud forests.
Importance of cloud forests
Watershed function. Because of the cloud stripping strategy the effective rainfall can be doubled in dry seasons and increase the wet season rainfall by about 10 percent.
Vegetation. Tropical montane cloud forests are not as species-rich as tropical lowland forests but they provide the habitats for many species that are found nowhere else.
Fauna. The endemism in animals is also very high. One of the best known cloud forest mammal is the Mountain Gorilla (Gorilla b. beringei).
Current situation
In 1970, the original extent of cloud forests was around 50 million hectares. Population growth, poverty and uncontrolled land use have contributed to the loss of cloud forests. The 1990 Global Forest Survey found that 1.1% of tropical mountain and highland forests were lost each year, which was higher than in any other tropical forests.In Colombia, one of the countries with the largest area of cloud forests, only 10-20% of the initial cloud forest cover remains.Significant areas have been converted to plantations, or for use in agriculture and pasture. Important crops in montane forest zones are tea and coffee, but also logging special species such as Podocarpus causes changes to forest structure.Currently, one third of all cloud forests are protected.
Monday, June 13, 2011
The Great Indian Bustard, a bird species once found in abundance across the grasslands of India, is facing the risk of extinction.
The 2011 Red List of birds, released by the International Union for Conservation of Nature (IUCN), has enlisted the bird in the Critically Endangered category, the highest level of threat. The population of the species is estimated to be just 250.
The Bustard species has been classified as critically endangered “as it has undergone an extremely rapid decline owing to a multitude of threats, including habitat loss and degradation and disturbance. It now requires an urgent acceleration in targeted conservation actions in order to prevent it from becoming functionally extinct.”
The list has classified 189 species worldwide as critically endangered, 381 as endangered with very high risk of extinction and 683 as vulnerable with high risk of extinction. It has also listed 843 species as near-threatened. A total of 2,096 species were treated as global conservation priorities. The threat status of 62 species could not be properly assessed following deficiency of data.
Monday, November 22, 2010
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