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Antarctic plants repair themselves
November 26, 2001Dutch researchers funded by NWO have studied the effects of the hole in the ozone layer on the vegetation in Antarctica. The repair mechanisms of lichens and mosses appear to be effective even at low temperatures. Nevertheless, the ecology of the Antarctic is still under threat. The rise in temperature caused by the greenhouse effect is doing irreparable damage.
Between 1997 and 2001, Dutch ecologists studied a species of grass, moss and algae and lichens growing on the Antarctic Peninsula. With colleagues from the Netherlands Institute of Ecology in Yerseke, Daniela Lud investigated the effect of ultraviolet radiation on the growth of the vegetation. In the spring, the Antarctic Peninsula is exposed to harmful UVB radiation due to the hole in the ozone layer.
The researchers placed filters over the vegetation. Half of the filters allowed harmful ultraviolet light to pass through and the rest did not. This allowed the ecologists to determine whether the ultraviolet light influences photosynthesis and the concentration of protective pigments in the plant, moss and lichen. They also investigated whether the ultraviolet light damaged the genetic material of the vegetation.
The negative effects of ultraviolet radiation turned out to be only slight. The vegetation contained large quantities of protective pigments. DNA repair mechanisms also operated very effectively at low temperatures. So much for the good news.
The same research project also came to other, less positive conclusions. The team compared exposed sites with somewhat warmer sheltered ones. The temperature did have an influence on the vegetation. Some mosses and Antarctic hairgrass grew faster at the higher temperature, while lichens reacted hardly at all.
The researchers expect that any future rise in temperature in Antarctica will have clear effects on the composition of the vegetation. The grasses and mosses, which grow rapidly, will replace the lichens.
NWO (Netherlands Organization for Scientific Research)
Ozone Current Events and Ozone News RSSOceans' uptake of manmade carbon may be slowing
The oceans play a key role in regulating climate, absorbing more than a quarter of the carbon dioxide that humans put into the air.
Tiny bubbles clean oil from water
Small amounts of oil leave a fluorescent sheen on polluted water. Oil sheen is hard to remove, even when the water is aerated with ozone or filtered through sand.
A bubbling ball of gas
The Sun is a bubbling mass. Packages of gas rise and sink, lending the sun its grainy surface structure, its granulation. Dark spots appear and disappear, clouds of matter dart up - and behind the whole thing are the magnetic fields, the engines of it all.
Nitrogen loss threatens desert plant life, study shows
As the climate gets warmer, arid soils lose nitrogen as gas, reports a new Cornell study. That could lead to deserts with even less plant life than they sustain today, say the researchers.
Researchers discover links between city walkability and air pollution exposure
A new study compares neighborhoods' walkability (degree of ease for walking) with local levels of air pollution and finds that some neighborhoods might be good for walking, but have poor air quality.
Interactions with aerosols boost warming potential of some gases
For decades, climate scientists have worked to identify and measure key substances -- notably greenhouse gases and aerosol particles -- that affect Earth's climate.
Report examines hidden costs of energy production and use
A new report from the National Research Council examines and, when possible, estimates "hidden" costs of energy production and use -- such as the damage air pollution imposes on human health -- that are not reflected in market prices of coal, oil, other energy sources, or the electricity and gasoline produced from them.
Air pollutants from abroad a growing concern, says new report
Plumes of harmful air pollutants can be transported across oceans and continents -- from Asia to the United States and from the United States to Europe -- and have a negative impact on air quality far from their original sources, says a new report by the National Research Council.
U.S. needs nearly $200 million more on climate-related health research
A recent commentary suggests that the U.S. should spend roughly $197 million more than it currently does to research the impact of climate change on public health.
Ozone layer depletion levelling off
By merging more than a decade of atmospheric data from European satellites, scientists have compiled a homogeneous long-term ozone record that allows them to monitor total ozone trends on a global scale - and the findings look promising.
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Big Blue Air Ball Ozone Generator by Big Blue Air Dont be fooled by other products that claim to eliminate odor but are not true ozone generators. Many of these are simply ionizers, which do not eliminate odors nearly as effectively or quickly as ozone generators do. For air purification in grow rooms, as well as kitchens, offices, bedrooms, bathrooms, closets, hotel rooms, and other small to medium-sized areas. The Air Ball is a corona discharge ozone generator which removes odors caused by organic nutrients and plants, as well as food, beverages, tobacco smoke, mold, mildew and other elements. This convenient unit sits on any table, shelf or hangs on the wall for automatic air purification. Its unique style, blends into any room and provides you with fresh, clean air. Its energy efficient, using only 6 watts. Its closest... |
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Suraki Ozone Generator Room Air Purifier by Samson Brands This air filter was designed to be used in smaller places such single rooms, closets, restrooms and Pet Habitats. It is compact enough to join you on vacation or business trips. The ozone technology eliminates odors and sterilizes killing up to 99.9% of viruses, molds and bacteria. The Suraki GBA-200 uses the corona discharge method of ozone production and is effective in areas up to 300 sq. ft. Suraki GBA-200 has shown to be effective with germs commonly found in pet areas:Household germs: Dermatophytes E. coli Legionella Pneumophila Salmonella Staphylococcus Pseudomonas Aeruginosa Molds and Mildew Dogs: Parvovirus Paramyxovirus (Distemper) Canine demodicosis Canine scabies Cats: Ear mites Bordetella Bronchiseptica |
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3Q Electrostatic Ionic Air Purifier by 3Q INTERNATIONAL This is an electronic air purifier. It uses what is known as an ionizer to filter out the dirty air. The electronic air purifiers have two sections for getting rid of dirty air. One section is for ionizing and the other section is for collecting the dirt. In the ionizing section, dirty air particles pass between ionizing wires and plates connected to a high voltage power supply. Over 8000 volts ionizes the air, creating positive ions which attach to the particles leaving them with an intense electrical charge. The charged particles then move to the collection section, where they encounter closely-spaced, oppositely-charged collector plates. Positively-charged particles attach to the negative plates and negatively-charged particles attach to the positive plates. Negative ions are important... |
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Airfree Onix 3000 Ozone Free Home Air Purifier by Airfree Airfree is the right solution for allergy and asthma suffers. It is also highly indicated for mold problems.Let us introduce you to Airfree the new and clean technology to reduce indoor pollution. Inside Airfreeââ¬â¢s patented ceramic core 99.99% of all micro-organisms: spores, fungus, bacteria, virus, mold spores, are incinerated at temperatures around 400F (250úC). That is done without significant heat contribution to the ambient. No living microorganism survives this power.Airfree reduces Ozone whereas ozone generators generate dangerous levels of such harmful gas that destroys lung tissue, triggers respiratory diseases, and corrodes metallic equipment. Model: Airfree Onix 3000 Capacity: 650 sq.ft (61mò) Eletric consumption: 52W Voltage: 110-240V Dimensions: height... |
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Dragostea Din Tei (Original Romanian Version) O-Zone (Primary Contributor) |
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