Sentences with phrase «viable populations of»

When peat that has been frozen for thousands of years thaws, it still contains viable populations of methanotrophic bacteria [Rivkina et al., 2004] that begin to convert the peat into CO2 and CH4.

Limiting other stressors and impacts, for instance fishing mortality, may be one way to help maintain viable populations of sensitive species and to reduce the impacts of acidification on assemblage structure and ecosystem function.

a seamless mosaic of forests and associated natural treeless ecosystems that exhibit no remotely detected signs of human activity or habitat fragmentation and are large enough to maintain all native biological diversity, including viable populations of wide - ranging species».

They define this as «a seamless mosaic of forests and associated natural treeless ecosystems that exhibit no remotely detected signs of human activity or habitat fragmentation and are large enough to maintain all native biological diversity, including viable populations of wide - ranging species».

From the jungles of Papua New Guinea to the slopes of the Andes, Kris has identified some 100 new mammal species and documented viable populations of animals previously thought to be in major decline or even extinct.

Collaborating with management and regulatory agencies, farmers and ranchers to ensure that appropriate habitat, knowledge and management capacity are available to support viable populations of sage grouse, Columbia sharp - tailed grouse and pygmy rabbits.

«If we succeed with our project in introducing a new, viable population of alligator snapping turtles, it's likely that no one will see them,» Phillips said.

Students are challenged to grow the mountains to their maximum height (corresponding to the maximum change in light level on either side of the chain) while maintaining a viable population of plants on each side.

Not exact matches

If free public transport may not be a viable option for cities like London or New York — Tallinn has a population of just over 400,000 — there are other service options, White says.

Nonetheless, Canada came in third place for the number of researchers in our LinkedIn and conference presenter searches, making it a viable competitor to the U.S., with 1,154 high - level profiles, which is high given Canada's small population and GDP.

-- Many species can not have viable populations consisting of a single male and a single female.

Regional economics and political groupings based on international complementary are viable answers to the real needs of the population and a necessary alternative to neoliberal globalization.

If the current fertility level continues, Europe's population of 727 million will plummet to 556 million by the year 2050, requiring more than three million immigrants per year for the next fifty years if Europe is to remain economically viable.

So, people need medical coverage and the «free market» «employer based» system is not a viable model for covering a population as large as that of the US.

His point was that Iceland's population of just 300,000 makes the option of «an election without politicians» viable.

Worth noting that the pool of viable Congressional candidates is demographically different the the pool of the population at large.

Finance Minister, Hon Seth Terkper who was also present at the function underscored the importance of a viable and sustainable scheme and drew a correlation between a healthy population and national development.

After isolation, if members of the split populations encounter one another and can not produce viable offspring that can themselves later successfully interbreed and produce viable offspring (hybrids such as mules are infertile), then these two populations constitute two different species.

But «the continued deterioration of the Yangtze ecosystem,» he says, «means that the species has no hope of even short - term survival as a viable population in the river if it has not already disappeared.»

Yet in a second, eight - state survey of 36 ginseng populations, the maximum size was 406 individuals — that is, none were viable.

A new University of Washington study finds that urban crops in Seattle could only feed between 1 and 4 percent of the city's population, even if all viable backyard and public green spaces were converted to growing produce.

Bradshaw and his colleagues recently surveyed studies of 212 vertebrates and found that the typical minimum viable population size required for a species to survive long - term is about 5,000 individuals.

Furthermore, the researchers suspect that even if habitat destruction were to halt in these areas, the remaining large animal species would have little chance of maintaining viable populations beyond the next few decades.

«Today, we have 700 to 750 individuals of the species,» says Martin, «but if action is not taken now, the white - headed duck could soon be outbred by the invading ruddy duck, and wiped out in Spain, the only Western European country with a viable population.»

They found that there are now only two habitats large enough to host more than 30 breeding females, an indicator of viable tiger populations over the long term.

«In lieu of a practical means of delivering [canine distemper virus] vaccines to wild tigers, the most viable strategy to ensure their conservation is the maintenance of large connected populations within protected areas that buffer the effects of local declines,» Gilbert and colleagues write.

«Moreover, it points to the need for genetic rescue and protection of important source populations that are still genetically viable.

◯ All FACS plots in gating scheme (including all controls), leading to final population of viable, CD34 + / CD31 −, CD31 +, and CD45 + cells.

Consequently, various species have merged into hybrid populations, as the male nuptial coloration which attracts females of the same species has become less effective; certain deep - water habitats are no longer viable.

This is at least suggested by the observation that the mesenchymal subpopulation in the HMLE model remains viable upon most chemotherapeutic treatment regimens, under conditions that allowed the effective elimination of the epithelial population [7].

Eventually there will be no need for the chimeras and surrogate parents, once the captive population has reached a size that individuals can be removed for wild release without endangering the continuance of the flock we will have reached our goal of a viable captive population.

Immunofluorescence analysis of the two populations, following overnight adherence to exclude analysis of non-viable cells, revealed that > 97 % of the SSEA3 - positive population expressed detectable SSEA3 / 488 fluorescence and 0 % of the SSEA3 - negative population expressed detectable SSEA3 / 488 fluorescence (Figure 2C), demonstrating that the fluorescence activated cell sorting process can purify viable subpopulations of cells from a heterogeneous somatic population.

Flow cytometry allows researchers to quantify and isolate rare viable cell subsets from heterogenous populations in single - cell suspensions based on differential expression of surface antigens.

«While existing theories on why there is so much variation in the ability of different human populations to construct viable states are usually formulated verbally, by contrast, the authors» work leads to sharply defined quantitative predictions, which can be tested empirically,» they added.

While the Paleo diet may not be a viable option for the entire human population in our current agricultural system, and is indeed most popular among relatively affluent Westerners, this is not so much a fault of the diet itself but of our current economic paradigm.

Resistance training, increased protein intake, and creatine supplementation in combination with resistance training has shown to be viable interventions for the aging population in the prevention of muscle loss and strength.

As both a practitioner and researcher, Liz's focus areas in Integrated STEM through engineering include school and / or district transformation; diverse populations and STEM; developing viable models through sustained engagement with administrators and teachers; use of effective, research based tools for STEM implementations and focusing on engineering specifically as an effective tool for integrated instruction.

If a device can not be used by all students or a strong majority of the population, they are considered not a viable investment of the school's money and alienates specific students.

That's a good question, and this article will seek to answer that question and provide some insight into what may become an epidemic in America in the near future — the accelerating population of people over 65, their need for LTC and finding a viable solution to afford the costs and services associated with LTC.

Earning more money is a perfectly viable option for the majority of the U.S. population.

``... the ecological and conservation significance of these kill tallies is difficult to contextualise, because (1) there are no reliable estimates of the total population of birds in Australia; (2) predation may fall disproportionately on some bird species; (3) some bird species may be able to sustain high mortality rates and maintain viable populations but others may not; and (4) as demonstrated here, there is substantial spatial variation in the numbers and proportion of birds killed across Australia.»

«Now comes the important task of securing a viable future through restoring critical habitat and diversifying their populations,» Chassé explains.

In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.

Jimmy Carter In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.

You must be aware of the option, know what the option means, and rely on the player base to make one choice or another or have enough of a population that both styles of play are viable for participation.

And thus it would have meant the end of human civilization and essentially all modern mammalian — including human — life on essentially almost all the planet, since modern mammals can not survive with typical summertime afternoon heat indexes around 200 degrees F or have viable populations at even just 150 degrees F without suitable microenvironments to retreat into.)

UC Davis doctoral student Taylor Chapple notes,» [T] his estimate only represents a single point in time; further research will tell us if this number represents a healthy, viable population, or one critically in danger of collapse, or something in - between.»

Given rates of population growth are already slowing, it should be viable to have a reasonable level of technology.

And even in your more optimistic scenario (which I largely do share) only smaller population appears viable if its to be at a reasonable standard of living.

The important question is: How many of additional species living lonely lives in their isolated patches (the 5 %) would become extinct eventually because their population sizes are too small to be viable?