Tag: "prairies" at biology news

No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming

...nses that are tightly linked. "We cannot preserve prairies or maintain the functioning of these and other ecosystems if we continue to pollute them with high rates of atmospheric nitrogen deposition," said Tilman. "Nitrogen pollution is a problem that will grow progressively worse as the human population ri...

Bison Grazing Increases Biodiversity In Grasslands

... explains. Historically, nitrogen availability in prairies was driven by interactions between frequency of fires and grazing by large herbivores. In general, spring fires enhance growth of certain grasses, and herbivores such as bison preferentially graze these grasses, keeping a system of checks and balanc...

Mowing, Grazing Of Tall-Grass Prairie Increases

...ording to a long-term research study on tall grass prairies done at the Konza Prairie ResearchNatural Area by a trio of Kansas State University biology professors, bison grazing or mowingincreases the species diversity or the number of plant species that exist at a particular site ofgrasses on the prairie. Gr...

Greater Prairie Chicken Appears On Comeback Trail In Illinois

...e said. Greater prairie chickens once occupied the prairies from Canada to Texas. Theyare considered virtually extinct in Canada; their southern cousin, the Attwaterprairie chicken, is endangered on the Texas coastal prairie. An easternrelative, the Heath Hen, has been extinct since 1931. The current range...

Do wildlife corridors work? Studying butterflies and fragments of open space

...habitat-restricted species. For example, roadside prairies will be mosteffective as corridors for prairie species, and forest corridors will mostbenefit forest species. Because habitat restricted species are most oftenthreatened by fragmentation, corridors should be effective tools inconservation."...

Conserving the Everglades: Less is more

...ionthan sheer numbers of species. Take the wetland prairies of the FloridaEverglades, where less truly is more: low biodiversity is intrinsic to theecosystem's uniqueness and so should be preserved. "The choice of conservation areas solely on biodiversity may systematically biasthe process against such habit...

University Of Toronto team discovers salt tolerance gene in plants

...ad toimproved farming productivity in the Canadian prairies and many other areas ofthe world where crops are compromised by saline irrigation water, according to astudy in the August 20 issue of Science. The gene encodes a transport protein in plant cells whose activity allows plantsto grow even in highly sa...

Endangered butterfly needs proper habitat, special nectar

...and they are difficult to re-establish. The native prairies where the plants once flourished have practically ...pecies. Less than one half a percent of the native prairies of the Willamette Valley remain, said Schultz. "The native grasslands are essentially gone." "Th...

Tallgrass prairies may provide early warning of climate change

...versity scientists. Long-term studies in tallgrass prairies may be able to predict and help researchers better...nts. Knapp said even though regions with tallgrass prairies have less rainfall variability, the ecosystem and its plants are well adapted to respond to that var...

Agricultural pests may threaten prairies

...ust, the adults begin moving from corn fields into prairies to feed on pollen and other parts of native flower...with soybeans, and soybean pests might also invade prairies to feed on native legumes such as prairie clover and leadplant. To keep agricultural pests from thr...

Museums must play a bigger role in conservation

...c and private organizations dedicated to restoring prairies and woodlands, marshes and meadows in the Chicago region. And by working with international and local partners, The Field Museum recently played a key role in creating a national park in Peru the size of Connecticut. Museums must do more to promote o...

Chinese tallow tree invades Texas prairies

...credible diversity of native plants in the coastal prairies is gone within 30 years after the Chinese tallow ...allow trees out. He is also flooding sections of prairies and pumping water out of others to determine whether wet or dry conditions can make the prairies mo...

Invading species have harder time cracking diverse plant communities

... have bedeviled ecosystems from lawns and farms to prairies and oceans. Recent invaders of North America include zebra mussels, purple loosestrife and Eurasian watermilfoil. In 1958 British ecologist Charles Elton hypothesized that communities with diverse arrays of organisms were better equipped to resist in...

Endangered butterfly needs special environment

...nders Blue is a species that used to thrive in the prairies of Oregon, until its habitat was disturbed by farming and development. Only one half of one percent of this grassland remains in its native form. Prairies were the earliest areas that were settled and farmed in Oregon, and few natural areas remain,...

Hibernators may hold the key for better human organ preservation

...e commonly seen around the golf courses, lawns and prairies of the American Midwest. Although a problem for groundskeepers because of their habit of digging holes, soon they could be famous for providing clues to keeping life-saving human transplant organs viable for extended periods of time. Background Li...

Mongolian road threatens last great over-land migration of Asian wildlife

...land in Mongolia an area likened to the long-gone prairies of the American West, complete with staggering migrations of hundreds of thousands of animals is threatened by a proposal to build a road through its center, according to scientists with the New York-based Wildlife Conservation Society. The road pro...

Changes in jet stream, storm tracks, linked to prairie drought patterns, study finds

...kota and Minnesota. "Our results from the Canadian prairies show a previously unknown and abrupt shift in climatic conditions around AD 700, while in the northern U.S. prairies, the shift occurred 500 years later, at the onset of the Little Ice Age in North America," says Dr. Laird. Although the mechanisms be...

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