Sentences with phrase «grassland ecosystems»

For the last 35 years, Hoogland has studied four species of prairie dogs living in grassland ecosystems within national parks or wildlife refuges in the western U.S..

That work will take place through the Nutrient Network, an international collaboration coordinated by CBS faculty and study co-authors Eric Seabloom and Elizabeth Borer that makes it possible to conduct research on a variety of grassland ecosystems around the world at the same time.

These will include studies of ocean acidification, the urban response to climate change, and the effect of global warming on snowpack and water availability in western states and on grassland ecosystems, said Scott Collins, the lead organizer for this year's half - day symposium.

While burning can help to slow the expansion of trees and shrubs, additional actions are need to maintain quickly disappearing grassland ecosystems.

Nostalgia may be one good reason for restoring bison to the North American plains, but now there's a scientific incentive as well: Bison appear to help keep grassland ecosystems healthy.

The authors are concerned the dramatic reduction in size of big bluestem foretells a fundamental shift in the nature of the Midwestern grassland ecosystem.

«A desert grassland ecosystem could fairly quickly change into a different state, such as shrubland.

The Sahara expands as the Sahel retreats, disrupting the region's fragile grassland ecosystems and human societies.

Shrub encroachment is associated with changes in soil bacterial community composition in a temperate grassland ecosystem — Xingjia Xiang — Plant and Soil

A portion of this controversy and the lack of scientific support for the claims made for his method on livestock productivity and grassland ecosystem function may be found in peer - reviewed papers (e.g. Briske et al. 2008).

«Because grassland ecosystems are the most vulnerable to extreme climate events, we examined data collected by many other scientists to try and understand the relationship between rain events and drought on the potential productivity of grasslands,» said Chuixiang Yi of City University of New York.

Findings in the paper, «Worldwide Evidence of a Unimodal Relationship between Productivity and Plant Species Richness,» reveal a consistent biological rule governing the link between plant biomass and species richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant biomass.

Long - term CO2 enrichment of southern African C4 grassland revealed limited impacts on nitrogen cycling and soil C sequestration (Stock et al., 2005), in contrast to greater C sequestration in short - term studies of grassland ecosystems (e.g., Williams et al., 2004a).

But field studies in the Midwest suggest that planting native switchgrass, with a few other plant species thrown in for good measure, could actually help restore the grassland ecosystems that once covered the middle of the continent.

Researchers working in northern Siberia have been striving to restore the grassland ecosystem that supported mammoths, woolly rhinoceroses and other giants during the Pleistocene epoch, between 1.8 million and 10,000 years ago.

The tundra and much of the taiga — the sometimes swampy coniferous forest of high northern latitudes — were once a grassland ecosystem known as the «mammoth steppe.»

In another Foundation - funded project, the team is using samples from the field vaccine study to help understand plague ecology and overlap among rodent communities and prairie dogs in grassland ecosystems.

«We can identify the impacts of climate extremes on these grassland ecosystems by comparing ecosystem performance in each year to the perfect curve,» said Yi.