Population ecology is the branch of ecology that studies the structure and dynamics of populations. In population ecology a population is a group of individuals of the same species inhabiting the same area. In contrast to genetics‚ where the population is a group of interbreeding individuals of the same species‚ which is isolated from other groups and in human demography‚ the population is the set of humans in a given area. Population density is a common biological measurement and is often used
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Before the end of the year 2011 the world can expect the population to hit an historic accomplishment of reaching seven billion people. The birth of this seven billionth baby will happen sometime in “October or November” (Nagarajan). This baby will most likely be born in India due to India having the highest fertility rate of “fifty one babies every minute” (Nagarajan). So is this an accomplishment for humans beating nature by populating the Earth? Or on the other hand will humans soon have to come
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For the last 50 years‚ world population multiplied more rapidly than ever before‚ and more rapidly than it is projected to grow in the future. In 1950‚ the world had 2.5 billion people; and in 2005‚ the world had 6.5 billion people. By 2050‚ this number could rise to more than 9 billion (see chart "World Population Growth‚ 1950-2050"). Anthropologists believe the human species dates back at least 3 million years. For most of our history‚ these distant ancestors lived a precarious existence as
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Population Density Debra Smith OMM 612 Managing Social Change Prof. Martin Cain September 24‚ 2012 Population Density According to Social Indicators Research (2002) population density is “the number of people living per square kilometer in the district of the city where the respondent lived” (Social Indicators‚ proquest database). The American population is very dense. According the United States Census Bureau the current United States population is 314‚440‚872 people. In some areas of
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witnessing a tremendous change in the ratios of elderly to the young. Over the next 40 years‚ the population of people aged >60 will grow by 1 billion to 2 billion. How does the fewer young support the high ratios of elderly? As they grow older‚ they are likely to be less productive due to health issues. How would the world economy cope with less money and more expenses? The ageing population in Singapore is growing at an alarming trend. We currently have more than 450‚000 people aged 65 and
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head: DEMOGRAPHICS OF THE AGING POPULATION Demographics of the Aging Population University of Phoenix Health Care Consumer - Trends and Marketing HCS-490 Ann Fairchild July 31‚ 2011 Demographics of the Aging Population The aging population is one the most rapidly increasing issue across the nation today. According to demographic data‚ it has been gradually developing over the last two hundred years. It has become a factor in many countries. The aging population is a result of declining humanity
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here is an ever aging population in the UK; this has been described as a ‘pensioners time bomb’ and will result in many changes for society. There are a number of factors that have caused this. Thomas McKeown (1972) argues that improved nutrition since the 1900‘s has accounted for up to half the reduction in death rates another factor for this is medical improvements (such as the introduction of the NHS in 1948 and antibiotics) and public health measures (like the Clean Air Act of 1956). Some people
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Demographic Paper The effects and changes in population demographics of Encino‚ California‚ a small neighborhood of San Fernando Valley region of Los Angeles‚ has an overwhelming influence on health service needs as the elderly population structure increases. Encino is situated in the central portion of the southern San Fernando Valley and on the north slope of the Santa Monica Mountains with Sherman Oaks‚ Bel-Air‚ and Brentwood as neighboring towns. The town of Encino consists of affluent‚ well
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Using Census Information in Planning In a number of countries‚ the population census plays a major role in the allocation of elected political seats in government. The number of elected officials for each governmental administrative unit is determined by the population size of a given locale. For some countries‚ the information is also used in the allocation of government resources. The size of the population determines‚ in part‚ the amount of money that is provided by government for development
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Aging population Definition Aging population is a phenomenon that occurs when the median age of a country or region rises due to rising life expectancy and declining birth rates. This problem is keep occurring in the whole world‚ especially in developed countries such as Japan‚ US and it becomes a global problem. Causes of aging population in Hong Kong Aging population in Hong Kong is caused by two main reasons: declining birth rate and low death rate. Low death rate
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