Demecology – the ecology of populations The main idea: Note how mathematical models are used to examine variation in growth of a population. Lecture outline: 1. Statistic and dynamic characteristics of population. 2. Growth curves patterns: J-shaped curve and S-shaped curve 3. Population regulation: Density-dependent and density-independent factors. 4. Human population patterns: - Population numbers. - Demographic transition and structure - Population urbanization 1. Statistic
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Population growth in yeast Aim: To study the population growth rate of yeast‚ a microorganism Saccharomyces cerevesiae Variables: | | Units | Independent variable | Time the readings were taken | Hours | Dependent variable | Absorbance (increasing yeast population) | - | Controlled variables | Units | Possible effects on result | The wave lengths | Nanometer | since the transmission and absorbance is being measured at a specific wave length‚ so if we change it the results
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analyze the physical activity levels among the elderly population in the United States. Individuals who are 65 years and older are classified as elderly. As age is positively correlated with the increase of health risks‚ exploring the barriers of physical activity among this population is essential. There are clear barriers to physical activity among this population as the Office of Disease Prevention and Health Promotion claims the elderly population as the most physically inactive of any age group (Older
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Introduction: Pakistan’s population has increased from 34 million in 1951 to 152 million in mid 2005. The addition of over 116 million Pakistanis in just five decades is due to the high population growth rates in the last thirty years. Continuing high population growth will amount to Pakistan’s population reaching 220 million by the year 2020. Coupled with poor human development indicators such as low: a) Literacy b) high infant mortality c) low economic growth
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International problem: Over fishing Fishing once thought of as a leisure activity is now causing serious issues on the marine environment. Fishing‚ when taken to the extreme can cause species to deplete in numbers and over turn the natural food chain. Many people are involved in over fishing all over the world. The reasons they take part in the practise are also altering. However many of the fisherman are from poorer countries and they see it as‚ the more fish they return home with the more they
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Chen Yun (3) 4S Anticipating change means the willingness to change the current situation and to achieve a better society by foreseen the future problem. Staying relevant refers to come up with innovative and effective solutions. Refer to the population white paper‚ the government discussed in detailed about the declining birth rate in Singapore. The situation is getting bad to worse as more and more Singaporean prefer singlehood or late marriages. To deal with this‚ they introduced Marriage &
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Michel Foucault- Right of Death and Power over Life The concept is important. Don’t get to the details. * In ancient Roman times‚ power of the sovereign over his subjects could be exercised in an absolute and unconditional way. The king had the authority to directly expose the life of his subjects in times of war and thus he held an indirect power over them of life and death. * During the classical age in the West‚ this death that was based on the right of the sovereign was not manifested
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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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1994‚ the population of Pakistan was estimated to be 126 million‚ making it the ninth most populous country in the world. Its land area‚ however‚ ranks thirty-second among nations. Thus Pakistan has about 2 percent of the world’s population living on less than 0.7 percent of the world’s land. The population growth rate is among the world’s highest‚ officially estimated at 3.1 percent per year‚ but privately thought to be closer to 3.3 percent per year by many planners involved in population programs
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Population Viability Analysis Introduction Over the last few lectures we’ve talked about the stochastic threats to persistence in small populations. We identified five classes of threats and some of their qualitative properties: 1. Genetic stochasticity — Not a problem in populations with Ne greater than a few hundred. Therefore‚ not likely to be a problem in populations large enough to buffer environmental stochasticity 2. Demographic stochasticity — Unlikely to be a problem in populations with
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