Tag: "grazing" at biology news

Purdue Researchers Prod Plants To Clean Up Pollution

...as found at high levels in livers of British sheep grazing on a pasture fertilized for many years with sewage sludge. According to findings reported at the annual meeting of the British Society of Animal Science, cadmium levels in the sheep livers were high enough to cause concern but probably not high enoug...

A New Biochemical Link Established Between Stress, Sex And Dominance

...vies, the macho fish also gets the girl: He offers grazing rights to entice breeding females to lay their eggs in a sheltered nook within his territory. Only territorial males have the fully developed gonads capable of producing sperm to fertilize those eggs. All in the head All of this is reflected in a p...

Keep Off The Grass - Reduce Air Pollution

...reased by 180 times," says Mr Galbally. Cattle grazing or trampling will have a similar effect to mowing, increasing emission rates from grass. Scientists believe that some of the additional gases released by cut grass are natural antibiotics, which act to disinfect the wound site. Gases released...

Weary Tibetan People Find Supporting Hand In ASU Graduate Student

...biology professor and Foggin's thesis advisor. Old grazing practices have changed for the nomads as grasslands have been degraded during this period making native animals, such as gazelle and antelope, almost non existent, he said. More than 12,000 herders in a huge, five county area are starving, Smith sai...

Bison Grazing Increases Biodiversity In Grasslands

...azing, according to Collins. "Thus, reestablishing grazing in grasslands stressed by human activities enhance... assess effects of fire, addition of nitrogen, and grazing on plant species diversity. In one experiment, species richness declined on burned and fertilized a...

Mowing, Grazing Of Tall-Grass Prairie Increases

... Kansas State University biology professors, bison grazing or mowingincreases the species diversity or the nu...onductinglong-term studies on the effects of fire, grazing and climatic variability on tall grass prairies. Thison-going research looks at these various factor...

Minuscule Ocean Plants Help Stabilize Earth's Atmosphere, Climate

... their very short lives. Some are consumedby small grazing animals while others die before they can be eaten and sink tothe depths. All in all, phytoplankton take in enough atmospheric carbon dioxide toform a staggering 45 billion metric tons of organic carbon per year. And anestimated 16 billion of ...

USGS To Present Diverse Research At ESA Annual Meeting

...mpact Species Variety Contrary to popular wisdom, grazing does not increase plant species diversityfor eithe... The results suggest thatdisturbance of habitat by grazing animals does not speed the invasion of exoticweeds or produce a richer pattern of native species--at...

DDT, PCBs, And Invasive Plants - USGS Scientists Examine The Effects Of Contaminant And Invasive Species On Wildlife

...ergreen woodlands, some of which were under active grazing or hadexperienced grazing historically. The prevalence of native animals in previously grazed native vegetation issignifican...

Colorado State University Study Reveals Climate Change, Longer Growing Seasons Could Harm Grazing On Western Shortgrass Steppe

...rama, ahardy forage plant favored by livestock and grazing wildlife. While temperature data are localized, they support global climate changestudies that suggest an overall warming. A key factor is an increase innighttime cloud cover that traps heat near the earth's surface, Alward said. "Bl...

University Of California Researchers Call For Changes In Management Of Agricultural And Environmental Resources In 21st Century

...estockgrazing on these lands. Some view livestock grazing as a cause of almost everyform of environmental de...explore the political and ecological dimensions of grazing onCalifornia rangelands. Lynn Huntsinger and Sally Fairfax, faculty at UCBerkeley, provide backgrou...

Arctic indigenous leaders, scientists to study reindeer and caribou systems

...seand other arctic residents include reductions in grazing land and resources as aresult of large-scale development by mining and hydrocarbon industries, habitatalteration due to global warming and pollution, and shifts from subsistencehunting and herding to more intensive commercial herding. Fundamental ch...

Managing For Deer, Moose, Elk, Wolves -- And People

... National Park's Northern Range discussesissues of grazing elk. Dan Huff and John Varley with the NPS assert that currentelk populations do not exceed the ecological carrying capacity of the NorthernRange. They conclude that the Northern Range is not overgrazed by ecologicalstandards. Their study explores ...

LSU Ag Center Brucellosis Specialist May Help Stem Bison Controversy

... Because free-ranging bison may share the same grazing lands ascommercial cattle herds, cattlemen are concerned bison may transmit the diseaseto their cattle herds. In addition to the Yellowstone herd, only one privatebison herd is known to be infected. Elzer has been studying brucellosis for 14 ...

USGS Scientists To Speak On Rare Plants And Invasive Species At Santa Barbara Symposium

...ve annual grasses have become establishedfollowing grazing by cattle, deer, elk and rabbits. Kathryn McEachern will also participate in interagency poster presentations onisland restoration and conservation strategies. The 5th California Islands Symposium, sponsored by the Minerals ManagementService, will b...

Quarterly News Tipsheet -- Research Highlights From Pacific Northwest National Laboratory

...ye in the sky" to determine the conditionof public grazing lands. Remote sensing tools developed at Pacific ...by law toprovide data that indicates the impact of grazing practices on range land. Pint-sized heat pumps - Pacific Northwest thinks small - when it comes to...

Congress briefs: International congress on ecosystem health

... characteristics of California'srangeland used for grazing cattle and sheep have changed over time and varydramatically across both climatic and geographical regions of the state. Medvitz will discuss interactions between livestock production and habitatmaintenance, as well as the conflicts and dilemmas surr...

LSU Ag Center researchers look for better ways to assess pollution in Tangipahoa River

...terways. They also wantto help producers continue grazing their cattle without affecting water quality. "We want to create an atmosphere where dairying and recreation can coexist,"Drapcho says. Drapcho's work focuses both on identifying and assessing non-point sourcepollution and on designing control...

USGS studies wildfire ecology in the western United States

...re regime. Allen says that in the arid Southwest, grazing has played at least as big a role as fire suppress...trees were able to get established. The effects of grazing were then multiplied when fire suppression became the norm early this century. Eventually, open area...

Cleaner air and less acidification among proposals for new environmental goals

...ironment.More areas need to be protected, reindeer grazing needs to be adapted to thelong-term productivecapacity of the land and tourism and other industry must take moreresponsibility for theenvironment. In addition, the protection of endangered species must increase andmaximum limitsmust be introduced for...

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