Sentences with phrase «small changes in population»

Thus small changes in population in rural areas can have more of an impact than larger absolute changes in population in a metropolitan area.

Not exact matches

Sometimes the human genetic code changes and as a result, we see things happen that are small (in comparison to the population as a whole).

Macroevolution posed a problem to Darwin because his principle of descent with modification predicts gradual transitions between small - scale adaptive changes in populations and these larger - scale phenomena, yet there is little evidence for such transitions in nature.

Change can also occur due to accidental loss of alleles (genetic drift) in small isolated populations.

The proportion of congregations in the 1960s and 1970s that actually responded as prescribed to their contexts was in fact very small.21 As neighborhood populations changed racially, some churches whose physical and financial resources lingered after their former membership fled introduced service programs to assist the poor, but the adjustment seems in most cases to have stemmed from necessity or default rather than from deliberate reorientation and restructuring by members who themselves stayed on to be transformed.

Michael Behe (in The Edge of Evolution) points out that there is abundant evidence for «microevolution» (smaller population change), but there is a boundary at which the evidence for microevolution stops and evidence for macroevolution either doesn't exist, or any clues that do exist are beset with problems so serious that explanatory attempts boil down to «just - so - stories.»

In northwest Africa, where what Werz has called an «arc of tension» runs through Nigeria, Niger, Algeria and Morocco, he said the projected massive population growth combined with small - onset changes brought about by climate change — like sea - level rise along the Niger Delta, the loss of hundreds of villages through desertification and the virtual disappearance of Lake Chad — is bad enough.

In contrast to the conversion of alpha cells, which only concerns a small fraction of the alpha cell population, the new mechanism involving delta cell fate change is a more efficient way of offsetting the loss of beta cells and thus diabetes recovery.

Lead author Dr Orly Razgour, of the University of Southampton, explained: «Long - lived, slow - reproducing species with smaller population sizes are not likely to be able to adapt to future climate change fast enough through the spread of new mutations arising in the population.

Owing to the small number of participants in this subset of the study population, the pregnancy - associated change was not statistically significant.

The changes in biomass are worrying, says Michael Hirshfield, chief scientist of the advocacy group Oceana, based in Washington, D.C. Populations of small fish tend to boom and bust — making ecosystems less stable — much more when the ranks of top predators have been gutted.

If the outbreaks are just the result of environmental changes, perhaps Zika was always capable of causing serious effects, but they were rare in small populations and only became obvious when the virus hit a lot of people.

In addition, small populations can lose the genetic diversity that provides resilience to environmental change.

There is a long history of theoretical work about how genomes might change in small populations.

In his own latest book, Lovelock argues that climatic change is likely to lead to a hotter Earth that is able to sustain only a small fraction of the world's current population.

It never recovered completely — probably, the team concludes, because changes in habitat, particularly forest growth, kept populations small and isolated from the southern herds, which had less severe declines in diversity.

His study found population growth will likely play a small role in climate change, because the areas with the highest growth — like Africa — have a small carbon footprint.

Mark Davis from Macalester College in Saint Paul, Minnesota, points out that 86 per cent of the extinctions ascribed to invasive species occurred on islands, where endemic species have small populations and are poorly adapted for predators or environmental changes.

Program fellows from the 2009 — 2014 grant tackled problems of interest to Kansans such as the expansion of woody vegetation in rangelands, disease outbreaks in small mammal populations, or how insects respond to temperature change.

Because of small sample size, the changes in tumor - initiating cell number were not significant (P > 0.05), but these data are supportive of the in vitro findings and suggest that hypoxia may have a positive effect on the tumor - initiating cell population in ER - α — positive breast cancers and a negative effect in ER - α — negative tumors.

And so this all implies that given the pressing climate change issue and Paris targets set at 2050, smaller population and reduced consumption will have very limited impact, so we are mainly going to be reliant on renewable energy and carbon taxes and so on in the shorter term over the next 20 — 30 years or so.

Every so often, farming processes included adding harmful toxins in herbicides and pesticides, not mentioning the feeding of animals in confined conditions which has drastically changed food production from the small local and sustainable farm model that the informed general population would want.

When the $ 62 million facility opened in 2006 with a relatively small student population, a computer - based curriculum delivered with the latest technology tools, and a unique partnership with corporate giant Microsoft, it set out to upend a secondary school model that had changed little since the industrial era and had spelled failure for too many students here and in cities...

A quick growth in population the mid-2000s changed the feeling of Lake Elsinore from a small lakeside town to a bedroom community of professionals.

In addition, this setting is flavored with the speech patterns that define the small community of Center Springs where American Indians, «coloreds,» and the white population struggle to co-exist in a rapidly changing worlIn addition, this setting is flavored with the speech patterns that define the small community of Center Springs where American Indians, «coloreds,» and the white population struggle to co-exist in a rapidly changing worlin a rapidly changing world.

Fibers are a type of carbohydrates that change the population of bacteria in the small intestines and helps to curb chronic diarrhea in puppies.

Our study was conducted in north - western Australia, where small mammal populations are sensitive to changes in fire and grazing management.

Small populations of island endemic taxa are often at risk of extirpation or extinction due to their reduced genetic diversity and increased susceptibility to genetic drift, disease, and climate change, especially in conjunction with over-exploitation, habitat loss, and predation or competition from invasive species [4 — 7].

Even small changes in relative risk can be quite substantial for diseases like malaria that kills over 1,600 per million and diarrhea that kills over 1,000 / million population — and yes, mostly children; therefore in this case even a small or «marginal» risk translates to a potentially very large number of additional deaths over baseline; this is how confusion between «relative» vs. «attributable» risk can be misleading.

I think population growth is huge issue for well - being in the developing world, but it is small in terms of energy consumption / climate change.

And so this all implies that given the pressing climate change issue and Paris targets set at 2050, smaller population and reduced consumption will have very limited impact, so we are mainly going to be reliant on renewable energy and carbon taxes and so on in the shorter term over the next 20 — 30 years or so.

The most effective «possible action» for curbing climate change, population is being ignored — enabling and encouraging people to have smaller families and fewer children is an essential component of a climate change strategy, and especially important in high consumer nations like the UK

In the supporting information (PDF) appendix the researchers show all their data, including the full list of the 100 bird species, whether the date for their spring migration has shifted (days per year from 1970 - 2000), population size has changed (1 = small change, 3 = large change) and during which time interval (either 1970 - 1990 and 1990 - 2000), what their average migration distance is (expressed in latitude change) and whether these birds winter in (southern) Europe or in AfricIn the supporting information (PDF) appendix the researchers show all their data, including the full list of the 100 bird species, whether the date for their spring migration has shifted (days per year from 1970 - 2000), population size has changed (1 = small change, 3 = large change) and during which time interval (either 1970 - 1990 and 1990 - 2000), what their average migration distance is (expressed in latitude change) and whether these birds winter in (southern) Europe or in Africin latitude change) and whether these birds winter in (southern) Europe or in Africin (southern) Europe or in Africin Africa.

With a well advised US President, he and his Administration can lead the way to 1) advocate to the US population they regain leadership of developing, for the benefit of all mankind, the world energy resource that will supply most of the world's energy for thousands of years; and 2) because there are only a small number of IAEA representatives to be persuaded and most would be already inclined to support the changes, the USA could persuade the IAEA delegates to set in process the review of the regulations that are unjustifiably retarding progress in the development of nuclear energy.

Adaptation to climate change that involves infrastructural works generally require large up - front overhead costs, which in the case of small islands can not be easily downscaled in proportion to the size of the population or territory.

The connection between UHI and dUHI is conplicated as shown in the log (or square) population law, better sited stations may experience more dUHI due to small changes than already heavily contaminated sites.

Thus, to the greatest extent possible, policies at all levels should be designed and implemented to meet four goals: (i) In sustainable ways, maintain and increase the security of food supplies for food insecure people, particularly in developing countries; (ii) Enable small - scale food producers and other vulnerable populations to become more resilient to climate change; (iii) Sustainably reduce emissions from the agricultural sector; and (iv) Reduce emissions from the conversion of other land to agriculturIn sustainable ways, maintain and increase the security of food supplies for food insecure people, particularly in developing countries; (ii) Enable small - scale food producers and other vulnerable populations to become more resilient to climate change; (iii) Sustainably reduce emissions from the agricultural sector; and (iv) Reduce emissions from the conversion of other land to agriculturin developing countries; (ii) Enable small - scale food producers and other vulnerable populations to become more resilient to climate change; (iii) Sustainably reduce emissions from the agricultural sector; and (iv) Reduce emissions from the conversion of other land to agriculture.

However, there are no compelling data to suggest a confluence of climate - change impacts that would affect global production in either direction, particularly because relevant fish population processes take place at regional or smaller scales for which general circulation models (GCMs) are insufficiently reliable.

Although the small change in rural population having an outsized impact does not sound logical to me.

«There is great concern that a lack of males could lead to inbreeding in small populations of marine turtles, potentially causing a population crash,» explained Lucy Wright, a PhD candidate at the University of Exeter who led the study, «however our research suggests that there are more males out there than expected considering the female - biased hatchling sex ratios and that their mating patterns will buffer the population against any potential feminising effects of climate change.»

The factors identified in this study as predisposing species to high extinction risk due to climate change suggest that conservation actions should focus on species that occupy a small or declining area, have small population size, or have synchronized population fluctuations.

Essentially what this means is that those areas currently identified by their warm, humid climate will be particularly affected by a seemingly slight change in climate; these regions are disproportionately impacted by even the smallest changes in temperature, and the population will most likely be especially disturbed by future climate change.

Almost all Toronto clinics signed a memorandum of understanding that acknowledged problems with the current catchment areas, concerns about the ability of small organizations to increase their capacity, inconsistencies in the range of services provided, and the fact the allocation of human resources doesn't recognize changes to the location of the region's low - income population.

Changing a girl's name from something fairly feminine, like «Sue» (which is less masculine than the mean female voter's name), to a more gender - ambiguous name, like «Kelly,» increases her probability of becoming a judge by roughly 5 %.16 This effect may appear small, but it is highly nonlinear in nominal masculinity; changing a girl's name from «Sue» to a predominantly male name, like «Cameron» (75 % of those named «Cameron» in South Carolina's voting population are male), increases her probability of becoming a judge by a factor of 3 (rChanging a girl's name from something fairly feminine, like «Sue» (which is less masculine than the mean female voter's name), to a more gender - ambiguous name, like «Kelly,» increases her probability of becoming a judge by roughly 5 %.16 This effect may appear small, but it is highly nonlinear in nominal masculinity; changing a girl's name from «Sue» to a predominantly male name, like «Cameron» (75 % of those named «Cameron» in South Carolina's voting population are male), increases her probability of becoming a judge by a factor of 3 (rchanging a girl's name from «Sue» to a predominantly male name, like «Cameron» (75 % of those named «Cameron» in South Carolina's voting population are male), increases her probability of becoming a judge by a factor of 3 (roughly).

The other outcome measures are not included due to volatility in measurement (counties with small populations see large changes in their rates) or changes in how the indicator is measured over time (the MAP tests have not remained consistent in the last several years).

Parents should be taught the skills to change their own behaviour and become independent problem solvers in a broader social environment that supports parenting and family relationships.40 A small increase in parental exposure to an evidence - based programme can produce meaningful change at a whole population level rather than individual improvement at an individual case level.3, 9

Higher income and educational levels, and smaller households are characteristics of a positive change.Find out what's going on in the local public schools: Look for curriculum changes that respond to a new student population.

And in Brooklyn (Kings County), which has changed from downscale to upscale and pricy in recent years, the population grew by 16,000 in 2015 — 5,000 less than the year before and the smallest increase of the past decade.