2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 1/6Winter 2019 Assignment 1 Populaƭon Dynamics andEcosystem ResponsesPOPULATION DYNAMICS AND ECOSYSTEM RESPONSESThis assignment is worth 20% toward your ¡nal grade in the course. There are two parts to the as(worth 15 marks) provides you with the opportunity to become familiar with basic concepts and twith population growth and population interactions with the environment. In Part B (worth 20 macurrent issue in population dynamics through a case study of the Lesser Snow Goose of North Amprinciples of population dynamics to understand the impacts on the structural and functional aspecosystem.In particular, by completing the assignment you will:demonstrate knowledge of population dynamics by reviewing concepts and examining growunderstand the changes that arise in population size in response to changes in birth rate anapply basic concepts regarding population dynamics to a case study of snow goose populaAmerica; anddescribe the abiotic and biotic changes in an ecosystem as a response to population growtIn completing the assignment, be sure to provide reference sources for your information to avoidstandard citation system as described in the following:http://umanitoba.ca/student/resource/student_advocacy/cheating_plagiarism_fraud.htmlhttps://libguides.lib.umanitoba.ca/biology/citinghelpPart A. Population Growth Dynamics (15 marks)ENVR 1000A ssignment 1ENVR-1000-D01 – Environmental Science 1 – Conc…2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 2/6Before beginning assignment 1, read the relevant sections from your textbook (pages 68 to 73) aninformation available at Otherwise.com (http://www.otherwise.com/population/index.html). You sSnow Geese in Peril video available at the following link: Snow Geese in Peril. Please note that if yunable to run the applets/simulations available at (Otherwise.com), refer to the appendix at the enthat displays this output for each of the exercises described at the website. Review the appendix wthe various experiments described at the website.Based on your readings and research, answer the following:1. Draw graphs to illustrate the relationship between time and population size for each of (i) ex(ii) logistic growth patterns. Identify the following phases on the appropriate graph(s) (4 maa. lag phaseb. exponential phasec. stationary phase/carrying capacityHow are these growth patterns similar and how do they differ? (1 mark)2. Outline the environmental conditions that are required for populations to achieve exponentipatterns. Based on this, which of the two growth patterns do you believe is most realistic inenvironment? Why? (3 marks)3. What happens when populations are not regulated in their environment? Answer this by dracurves in question 1. once again and include the outcome(s) of unregulated growth and theyour graph. (2 marks)4. Examine the simulations available at Otherwise.com (also available in appendix at the end osee how birth rate overall in¢uences population growth patterns. Based on your review, briebirth/growth rate (e.g., slow growing vs. rapidly growing) in¢uences overall patterns of expogrowth. Which of these birth rates is most sustainable and why? (5 marks)Part B. Lesser Snow Goose Population (20 marks)If you have not already done so, watch the Ducks Unlimited production Snow Geese in Peril.Snow Geese in Peril ©1998. Ducks Unlimited, Inc. All rights reserved. No alteration, duplication orpermitted without authorization. Reproduced with permission from Ducks Unlimited, Inc.Based on your independent research and the Snow Geese in Peril video, answer the following:5. Outline the features of the two major ecosystems used by snow geese during their annual mhow each of these ecosystems affects the carrying capacity and growth rate for the North Aoverall. Is this a human driven problem or a natural phenomenon? Justify your answer.(5 ma6. Surveys by the Canadian Wildlife Service and the U.S. Fish and Wildlife Service have been coearly 1940s. Information for the snow goose midwinter population in the Southern U.S. is avbelow.2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 3/6Table 1: Number of lesser snow geese surveyed in mid-continental U.S durTaken from North American Migratory Bird Survey Data.
Year Number of Birds(thousands)Year Number of Bir(thousands)1941 400 1993 22001945 450 1996 27001948 600 2000 32001958 750 2003 32001960 750 2005 29001962 680 2008 27001965 750 2010 30501969 800 2011 32001975 1600 2012 32501981 1750 2013 43501984 1900 2014 5500
dUse graph paper or Excel and graph the relationship of lesser snow goose population estimates oprovided in Table 1. Connect the individual values and label your graph with the key features of thedescribed in Part A above (e.g., lag phase, exponential phase, stationary phase/carrying capacity)do you observe in the snow geese population over time? Do you ¡nd evidence of possible populatpopulation dieback/crash as has been projected in the video? Justify your answer. (10 marks)7. Lastly, given the problem of an exploding population of Lesser snow geese, how can Societyissue and protect the Arctic ecosystem in the future?2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 4/6p y(5 marks)Resource and ReferencesSimulation models:Otherwise.com – http://www.otherwise.com/population/index.htmlVideo – Snow Geese in PerilLesser Snow Geese – https://alaska.usgs.gov/science/biology/avian_in¢uenza/species/species.pLight Goose Dilemma – http://www.ducks.org/conservation/national/light-goose-dilemmaArctic Ecosystems in Peril – https://searchworks.stanford.edu/view/8421098Appendix (Output from exponential and logistic growth simulations availabExponential GrowthExperiment 1: Exponential growth simulation by varying birth rate (# of offspring) as follows: birtbirth rate of 1.4 (blue), and birth rate of 2.0 (green).Taken from Otherwise.com (http://www.otherwise.com/population/exponent.html)Experiment 2: Exponential growth simulation using an initial birth rate of 1.5 which is changed to2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 5/6Taken from Otherwise.com (http://www.otherwise.com/population/exponent.html)Logistic GrowthExperiment 1: Logistic growth simulations using a constant birth rate of 1.5 individuals and varyifollows: 200 (red); 400 (royal blue); 800 (light green); and 1000 (light blue).Taken from Otherwise.com (http://www.otherwise.com/population/logistic.html)Experiment 2, 3 and 4: Logistic growth simulations using a constant carrying capacity of 1000 inrates of 1.2 (red), 1.8 (royal blue), 3.0 (green), and 5.0 (light blue)Taken from Otherwise.com (http://www.otherwise.com/population/logistic.html)top Copyright © 2014.Updated 2017.2019/1/29 Winter 2019 Assignment 1 Population Dynamics and Ecosystem Responses – ENVR-1000-D01 – Environmental Science 1 – Conceptshttps://universityofmanitoba.desire2learn.com/d2l/le/content/300166/viewContent/1455204/View 6/6Reflect in ePorwolio Download PrintOpen with docReaderAll rights reserved. No part of the material protected by this copyright may be reproduced, storedsystem, or transmitted in any form or by any means, electronic or mechanical, including photocorecording, or otherwise without the prior written permission from the copyright owner.The University of Manitoba, Distance and Online Education
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