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4 pages/β‰ˆ1100 words
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APA
Subject:
Social Sciences
Type:
Lab Report
Language:
English (U.S.)
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Topic:

Aspects of Population: Blue Sparrows, Brown Sparrows and Hawks

Lab Report Instructions:

The experiments that you have conducted so far were designed to help you learn about the many factors and interactions that can influence the size and growth of a population. Since ecosystems are affected by random events such as changes in weather, applied ecologists must often make an assessment of "extinction risk." They do this by constructing simulation models similar to PopEcoLab and running multiple simulations. This assignment is designed to have you use PopEcoLab to evaluate extinction risk by running multiple simulations (e.g., 20 simulations) and noting the frequency with which a population becomes extinct.
Set your initial population sizes to the following: 1000 blue sparrows, 1000 brown sparrows, and 50 hawks. Design experiments to study how the risk of extinction changes for any single parameter excluding clutch size and initial population size. Make a hypothesis about the effect of your change.
Examine the extinction risk during a 500 year period. Be systematic in your experimental design. Tip: If you go to the Initial Population screen and click on the Multiple Run Mode button, you can set the number of runs to 10. This will give you ten independent simulations that you can examine by using the spinners on the output screen.
Did the results of your experiments support your hypothesis? Explain how the experimental conditions you set up were responsible for your results. Once you think you have an explanation for your findings, design and carry out additional experiments to support or refute your thesis (for your additional experiments you can set the parameters however you want).
-Did the results of your experiments support your hypothesis? If not, reformulate a new hypothesis and carry out additional experiments. Explain how the experimental conditions you set up were responsible for your results. Once you think you have an explanation for your findings, design and carry out additional experiments to support or refute your thesis.
Discuss the results of your experiment with your instructor to clarify questions that you may have about interpreting the results of your experiment and understanding the effects of the experimental conditions you created.

Lab Report Sample Content Preview:

NAME
TITLE:
NAME:
COURSE:
Abstract:
Aspects of population, such as growth, immigration and emigration, entail population dynamics. Species in an ecosystem, usually affect each other in one way or another .A deeper analysis of how this happens is facilitated by PopEcoLab, whose simulation patterns play a vital role in prediction of future trends in the population dynamics of species. Natural habitats are usually influenced by probabilistic outcomes like adjustments in atmospheric conditions. The simulation gives a provision for chances of extinction, or extinction risk, for species.
Introduction:
Population can be defined as a group or collection of individuals. Individuals here cover for any type of species of living organisms. Population growth on the other hand, is defined as the gradual change in the total number of individuals in a particular ecosystem over a certain time period. Population growth is determined by considering certain parameters, such as the number of births and deaths during the period which the growth is forecast. The other parameters to be considered in population growth are emigration and immigration of species to and from this particular habitat, respectively. Growth can be negative or positive, depending on the outcomes of these parameters. This assignment offers more familiarity with Pop Ecolab through examining the population increase of brown sparrows.
Objectives
This session was meant to design experiments to study how the risk of extinction changes for any single parameter excluding clutch size and initial population size. It will also investigate what various changes in the life history, competition, predation, and habitat mean for the population size.
Hypothesis
There is a high chance of extinction of species in case of disaster, predation or increased competition in the habitat.
Methods
The entire experiment was basically virtual. As a result, it entailed the use of the computer system and the PopEcoLab online laboratory as the prerequisites. The population sizes were set at 1000 each for blue and brown sparrows. The population of hawks was set at 50.The extinction levels over a half millennium period was examined. The number of runs was set at 10 on the Multiple Run Mode button on the Initial Population screen.
Materials:
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