Sentences with phrase «dramatic environmental changes in»

Not exact matches

One is changed environmental conditions for a discrete subpopulation of the original population, such as when ice ages cause dramatic changes in sea levels, cutting species into subgroups.

The latter theory suggests that biological forms are surprisingly stable over long periods of time, and mutate suddenly and quite rapidly in response to equally sudden and dramatic environmental changes.

Even quite small changes in technology can have dramatic effects in reducing environmental impact.

The fact that it thinned so rapidly in the past demonstrates how sensitive it is to environmental change; small changes can produce dramatic and long - lasting results.

This effect on some genes may be a result of the buffering effect of living in a complex, interdependent society, where the «collective genome» is less vulnerable to dramatic environmental changes or other external threats, Robinson said.

Over the last 10 years, the change has been dramatic because a new generation of environmental advocates now hold positions of power in the legislature, on the ports commission and on the air resources board.»

Tens of millions of years ago, the African freshwater butterflyfish evolved a distinct body and lifestyle, and it has steadfastly clung onto them ever since, despite dramatic environmental shifts and changes in its own genes.

Marean's team found sandy layers just above the ash traces, which Ambrose says are indeed a sign of dramatic environmental change and a decrease in human occupation.

The team, which reports its discoveries online today in Nature, points out that the split between early apes and Old World monkeys took place during a time of dramatic environmental, climatic, and tectonic changes in East Africa.

Since the environmental conditions in Lake Baikal have remained stable for a very long time, these changes are dramatic.»

As has long been noted, our feathered friends often provide «canary in a coal mine» early warnings as to the impacts and perils of environmental changes — and the dramatic shifts in their populations and behaviors over recent decades is ominous indeed.

The rise of a generation of powerful female politicians, including U.S. Environmental Protection Agency administrator Christine Todd Whitman, pictured here, is deeply symbolic of the dramatic change in women's opportunities during the past century.

While we experience dramatic social, cultural, economic, and environmental changes, people across continents share in a continuing fight for social justice, solidarity, and tolerance.

Featuring two and three - dimensional works by local and national professional artists as well as graduate and undergraduate students from the SAIC, Converging Patterns addresses the question of our future fashions in light of dramatic social and environmental changes taking place now.

«rbG: b» confronts head - on the question of collective responsibility and environmental justice in a time of dramatic climate change.

The leading experts predict that we have less than 10 years to make dramatic changes in our global warming pollution lest we lose our ability to ever recover from this environmental crisis.

Climate change is only one of many types of environmental change effecting Earth's life support systems — in fact, there is now a serious risk that the dramatic gains to public health made since the 1950s could plateau or even reverse as a result of human degradation of a myriad of natural systems.

The retreat of the Laurentide Ice Sheet at the end of the last ice age represents a dramatic sequence of environmental change that is evident in geological records across North America.

Industry's complaints must be regarded with the same healthy skepticism accorded those who predict environmental catastrophe in the absence of dramatic changes in energy use.

But back to the main story — the dramatic change in the political reception given in Washington to this cost - effective approach to environmental protection.

Moreover, a new environmental review is needed to account for the dramatic changes in the outlook for the tar sands industry, as lower oil prices and a global movement to address climate change has led Exxon to write down billions of barrels of tar sands reserves and companies like Statoil and Total to pull out of the tar sands entirely.

«But the lead author of the study... says that he is not convinced that it is just the changing climate... «It could be partly due to this chaotic rainfall, but personally I don't think it can explain such a dramatic decline in mosquitoes, to the extent we can say that the malaria mosquitoes are almost eradicated in these communities... «What we should consider is that there may be a disease among the mosquitoes, a fungi or a virus, or they're may have been some environmental changes in the communities that have resulted in a drop in the number of mosquitoes»... The research team also found anecdotal evidence that their discovery was not an isolated case... «Other scientists are saying they can't test their drugs because there are no children left with malaria.»»