Chapter 5 Biodiversity‚ Species Interactions‚ and Population Control Summary 1. Two major factors affect the number of species in a community: the latitude in terrestrial communities and salinity/nutrients in aquatic systems. 2. Species play different roles in a community. Native species sustain the ecosystem in which they are a part. Some nonnative species will crowd out native species. Indicator species alert us to harmful changes in the community. Keystone species play ecological
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invest in but nonetheless promising. Developing technologies related to renewable energy and the like will have minimal effects in the short run but significantly huge effects in the long run. Population growth has a huge effect on the carrying capacity of our planet. The way to monitor this is by determining the maximum sustainable level of use of the resources and determining the maximum sustainable level of abuse of the environment. Technological advances in general bring about
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Overpopulation is not simply a function of the size or density of the population. Overpopulation can be determined using the ratio of population to available sustainable resources. If a given environment has a population of ten‚ but there is food or drinking water enough for only nine‚ then that environment is overpopulated; if the population is 100 individuals but there is enough food‚ shelter‚ and water for 200 for the indefinite future‚ then it is not. Overpopulation can result from an increase
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survival rates‚ therefore‚ with death rates low‚ the population increased rapidly. b) As the world became more populated from time A to time b‚ more and more pressure built up. Humans most likely became desperate due to reaching the Earth’s carrying capacity that they strived for new methods of living and to find new resources. People developed new strategies for farming and producing food to feed the larger population and also discovered new resources‚ which aided in sustaining the growing population
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through time and is never limited by food or disease‚ it has‚ exponential growth the birth rate alone controls how the population grows. 3. What is carrying capacity? Compare predictions for human population growth in developed countries versus developing countries. What will occur if carrying capacity is exceeded? The carrying capacity of a given ecosystem is the total number of organisms in a given species for which there are sufficient resources‚ so that they survive and reproduce.
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Footprint? The Ecological Footprint is a resource accounting tool used widely as a management and communication tool by governments‚ businesses‚ educational institutions and NGOs to answer a specific resource question: How much of the biological capacity of the planet is required by a given human activity or population? What does the Ecological Footprint measure? The Ecological Footprint measures the amount of biologically productive land and sea area an individual‚ a region‚ all of humanity‚ or
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paramecium grown alone for a total of 2 screen shots. Paste them below. c. On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know? Day 8 because the days after the same number was repeated. d. On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know? Day 14 because the day after‚ the same number was repeated. e. Was your hypothesis correct? Why
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assumption that these consequences would either take care of themselves or could be dealt with separately. In this article we discuss the relation between economic growth and environ- mental quality‚ and the link between economic activity and the carrying capacity and resilience of the environment Economic Growth‚ Institutions‚ and the Environment The general proposition that economic growth is good for the environment has been justified by the claim that there exists an empirical relation between
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Industrial Revolution & After Total Replacement Fertility- Number of children a couple has to have in order to replace themselves. Stable population. In order to have 0 population growth. What can reduce/limit population size. Decreased Reproduction Socio-economic and cultural factors contributing to declining birth/fertility rates. *Female changes in reproductive rates. Female employment status Higher education Postpone.control childbearing Children not needed for family labour
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together. (Make sure you understand what a hypothesis is before you address this!) Each paramecium growing on its own will be able to grow and flourish because there is nothing stopping it or competing with it. It will be able to grow to its full capacity. When there are both parameciums growing together; one paramecium‚ the stronger of the two‚ is going to grow faster and larger than the other. This will cause the weaker of the tow to stop growing. As time goes on the stronger paramecium will eventually
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