The K-T impact extinctions: Dust didn't do it
...nd therefore damage estimates from future asteroid impacts are also amiss. This latter point became a recent...ar less likely and that such medium-sized asteroid impacts would not have catastrophic global effects. But of course the regional effects would still be devast...South American forests offer glimpse of U.S. ecosystems before industrial revolution
...information they uncovered could have far-reaching impacts in many areas of ecology, from predicting the pace of global climate change to understanding the consequences of acid rain and agricultural run-off. "Nitrogen is a sort of master variable," said Perakis, who is the lead author of the paper and is now...US ecology dramatically altered by fertilizers and acid rain
...information they uncovered could have far-reaching impacts in many areas of ecology, from predicting the pace of global climate change to understanding the consequences of acid rain and agricultural run-off. "Nitrogen is a sort of master variable," said Steve Perakis, the paper's lead author and a research ...Media Advisory 2 - 2002 Ocean Sciences Meeting: press conferences scheduled
...ents that seek to assess the positive and negative impacts in two geographic areas. Kenneth Black will discuss a Scottish salmon farm, its production and its impact on the water column and the sedimentary layer on the ocean floor. Anthony Ostrowski will present results of the Hawaii Offshore Aquaculture Rese...Satellites tracking climate changes
... to livestock, which can have devastating economic impacts on the countries affected. In East Africa, animal husbandry is a major part of economy. Arab countries purchase a great deal of their meat products from East Africa. During the last Rift Valley Fever outbreak, many Arab nations stopped imports from ...NSF to support study of environmental warming in the Arctic
...rrestrial changesin the Arctic and their potential impacts on the environment,regional societies and economies. In funding the study, NSF isacting on the Arctic Research Commissions recommendation for along-term study of the causes and consequences of the changes. Initially, NSF will support a five-yea...NSF/EPA team up on grants to treat pollution with plants
...ll be investigated. The research will examine the impacts of phosphorus and calcium on arsenic accumulation, as well as the beneficial effects of mycorrhizal fungi for enhancing arsenic accumulation. For more information on the NSF grants, contact: Andrea Dietrich, (703-292-8070) or see: http://www.nsf.gov...Still waters? 'Clear-cutting' robs the deep-sea of ancient treasures
...ze raises the risk of extinction because localized impacts can eliminate all of a species, he noted. Van Dover's Science paper describes the treasure trove of life in small underwater "habitat islands"-hydrothermal vents and cold seeps-which shelter untold numbers of ancient creatures. Since the discovery, i...Corporations and environmentalists can be allies to reduce industrys ecological footprint
... Contributors lay out the environmental and social impacts of logging, mining, oil and gas development, and related infrastructure on the Earths critical ecosystems. This broad spectrum of case studies also demonstrates that companies can realize a host of benefits when biodiversity conservation and communi...Information technology provides biologists with new tools for biodiversity conservation
...of landscapes, including natural and anthropogenic impacts on biodiversity. Diana Wall will present the preliminary findings of the Global Litter Invertebrate Decomposition Experiment (GLIDE), the first world-wide network to examine the animals that dwell in soils on plant material (litter) and regulate de...Compounds rejuvenate rats, may aid humans
... and cancer as well as those that can have severe impacts on quality of life, such as Alzheimers disease and Parkinsons disease. Like many complex metabolic processes there is probably no single, simple answer to the aging process, Hagen said. Some scientists believe the process has a hormonal basis, in w...Proliferation of Argentine ants in California linked to decline in coastal horned lizards
...ersity of California, Berkeley. "Essentially, the impacts of Argentine ants in California starts with the displacement of native ants and then cascades throughout the ecosystem." The tiny dark-brown and black ants, which are about two millimeters in length, are thought to have entered the United States ...Purdue to help NASA create life-supporting ecosystem in space
...ort also is very valuable for its potential social impacts gained through educational outreach and developing partnerships with minority universities." U.S. Sen. Richard Lugar, R-Ind., said this research is important for the nation's space program. "This federal research grant for Purdue demonstrates the un......nce of southwestern WA may foreshadow the sorts of impacts we will start to see in southern Australia under greenhouse-induced climate change. Dr Bates said that the team hoped to extend the implications of the work to other states, such as SA and Victoria, but funds were not yet available to do this....Report supports sustainable food production
... into the future. Industrial agricultures damaging impacts on the environment and public health are becoming ...dborne diseases. The authors say the environmental impacts of industrial agriculture are many and far-reaching. For example, heavy farm machinery degrades soil...Adhesive science can help optimize use of timber resources
...y of novel adhesive systems. "We want to know what impacts durability -- what molecular phenomena lead to enhanced durability," he says. Early composite technology began in the 1920s with products like plywood. The field has grown slowly over the years, but has really taken off in the past 20 years. In many...Ethiopian fossil skull indicates Homo erectus was single, widespread species 1 million years ago
... African from late Asian ones. "One of the biggest impacts this calvaria will have on the field is making Homo erectus look more like a single species again." Six other Homo erectus fossils, apparently from separate individuals, also were found in the area, including three thighbones (femurs) and a shin bone...Hurricanes impact carbon sequestration by forests
...med by insects. Finally, he examined the long-term impacts of hurricanes on forest regeneration and productivity. McNulty found that even though hurricanes do not immediately change the state of carbon in a downed tree, a large amount of accumulated forest carbon is lost in the years following a major storm....Scripps scientists find ignored species play key role in ecosystem interactions
...ral communities can often have as much and greater impacts than larger species. Sala and Graham conducted field experiments and lab studies evaluating interactions between predators and prey (also called "interaction strengths") in a kelp forest community. They found that previous conclusions about interac...Impact events' kinetic energy may be key to understanding the severity of mass extinctions
The kinetic energy created by asteroid and comet impacts with the Earth may be key to linking some impacts with mass extinction events. Michael Lucas, a geology student at Florida Gulf Coast University, beli...