Top-Rated Free Essay

Lab Worksheet 4

Good Essays
Topics: Food chain, Ecology
Lab 4 Worksheet: Model Ecosystems

Student instructions: Follow the step-by-step instructions for this exercise found on the virtual lab and the instructions below and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus.

Please make sure that your answers are typed in RED.

:

1. Please make sure you have read through all of the information in the “Question” and “Field Guide” areas. If you come upon terms that are unfamiliar to you, please refer to your textbook for further explanation or search the word here: http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx 2. In this exercise, you will examine several model ecosystems and their characteristic plant and animal species. To begin, read the information in the “Field Guide” to learn more about the organization of five selected ecosystems. 3. You are now ready to begin the activity. Start by selecting the ecosystem type that you would like to model from the pull down menu in the laboratory area. Then click and drag the various organisms to their correct locations within the different trophic levels of the pyramid. Once you have moved all of the organisms click the “Check” button and fix any incorrect choices if necessary. Clicking on the “Pyramid of Energy” will reveal how much energy is available at each trophic level. Clicking on the “Pyramid of Numbers” will show the number of organisms at each trophic level within this type of ecosystem. Fill in all of the information from this pyramid on Table I below. 4. You must take one last step in the investigation of this ecosystem. It is important to determine the amount of energy that is transferred from one trophic level to the next. This is called the “energy conversion efficiency” (E.C.E.), and this ratio is determined by taking the energy value from a higher trophic level and dividing it by the energy value of the level below it. Please do these calculations as directed and input the data in your “Data Table” and Table I below. 5. When you are completely finished analyzing the ecosystem, you can then click the “Reset” button and select another type of ecosystem from the pull down menu. Follow the directions above to investigate this ecosystem and the three that remain. 6. Please finish this exercise by opening the “Journal” link at the bottom of the page and answering the questions.
Table I:
|Ecosystem Type |Producers |First Order Heterotrophs |Second Order Heterotrophs|Third Order Heterotrophs |
|Deciduous Forest |Organisms present: 7996 |Organisms present: 4559 |Organisms present: 1418 |Organisms present: 50 |
| | | | | |
| |Energy: 6011 |Energy: 623 |Energy: 61 |Energy: 6 |
| |Numbers: |Numbers: |Numbers: |Numbers: |
| |E.C.E.*: |E.C.E.*: .1036 |E.C.E.*: .0979 |E.C.E.*: .0983 |
|Hot Desert |Organisms present: 2603 |Organisms present: 831 |Organisms present: 58 |Organisms present: 5 |
| | | | | |
| |Energy: 200 |Energy: 21 |Energy: 2 |Energy: .19 |
| |Numbers: |Numbers: |Numbers: |Numbers: |
| |E.C.E.*: |E.C.E.*: .105 |E.C.E.*.0952 |E.C.E.*: .095 |
|Grassland |Organisms present: 549,106 |Organisms present: 1887 |Organisms present:30 |Organisms present:5 |
| | | | | |
| |Energy: 2000 |Energy: 223 |Energy: 19 |Energy: 2 |
| |Numbers: |Numbers: |Numbers: |Numbers: |
| |E.C.E.*: |E.C.E.* : .1115 |E.C.E.*: .0852 |E.C.E.*: .1052 |
|Antarctic Ocean Shore |Organisms present:5,478,000,000 |Organisms present:5504 |Organisms present:613 |Organisms present: 5 |
| | | | | |
| |Energy: |Energy: |Energy: |Energy: |
| |Numbers: |Numbers: |Numbers: |Numbers: |
| |E.C.E.*: 8006 |E.C.E.*: 784 |E.C.E.*: 86 |E.C.E.*: 7 |
|Freshwater Lake |Organisms present: |Organisms present: 2294 |Organisms present: 55 |Organisms present: 2 |
| |123,000 | | | |
| |Energy: 7,500 |Energy: 744 |Energy: 81 |Energy: 8 |
| |Numbers: |Numbers: |Numbers: |Numbers: |
| |E.C.E.*: |E.C.E.*: .0992 |E.C.E.*: .1088 |E.C.E.*: .0987 |

*E.C.E.= energy conversion efficiency ratio

Post-laboratory Questions:

1. The ultimate source of energy for most ecosystems is: a. Carbon b. Oxygen c. Sunlight d. Water

2. Organisms that directly use energy from the sun to make their own food are called: a. Autotrophs b. Hetertrophs c. Carnivores d. Decomposers

3. Which of the following illustrates the correct ordering of trophic levels? a. Decomposers(carnivores(autotrophs(herbivores b. Herbivores(autotrophs(carnivores(decomposers c. Autotrophs(herbivores(carnivores(decomposers d. None of the above

4. Within an ecosystem: a. Energy flows in one direction only and nutrients are recycled b. Energy is recycled and nutrients flow in one direction only c. Energy and nutrients flow in one direction only d. Energy and nutrients are both recycled

5. The efficiency of energy transfer from a lower trophic level to the next highest level is roughly: a. 1% b. 5% c. 10% d. 50% e. 80%

6. In aquatic ecosystems, biomass is least at which trophic level? a. Autotrophs b. Herbivores c. Carnivores

7. You are in an area where there are squid, seals and penguins. You are most likely in which ecosystem? a. Deciduous forest b. Hot Desert c. Antarctic Ocean Shore d. Grassland

8. You find yourself in an area where there are snakes, hawks and coyotes. Based upon these animal populations, you are most likely in which ecosystem? a. Deciduous forest b. Hot Desert c. Grassland d. You cannot tell from this information

9. You are in an area where the ground is littered with what appear to be dry, dead leaves. You are most likely in which ecosystem? a. Deciduous forest b. Hot Desert c. Grassland d. You cannot tell from this information

10. This zone has the greatest concentration of plankton in a freshwater lake ecosystem: a. Profundal b. Littoral c. Limnetic

You May Also Find These Documents Helpful

  • Good Essays

    Worksheet 4

    • 963 Words
    • 6 Pages

    Part 4 Distribution Decisions Worksheet Method Preferred distribution method Direct Intermediaries If applicable, number of channels Dual channels Multiple channels Channel alliances Nontraditional channels Costs Variable distribution costs will affect price of end product to consumer? Yes No Describe the role cost will play in your distribution method: It won’t affect the price because Proton use direct distribution method. Proton will use their own channels (Web, Showroom, and other…

    • 963 Words
    • 6 Pages
    Good Essays
  • Satisfactory Essays

    lab 4

    • 451 Words
    • 2 Pages

    Lab 4 Part 1: 10 points Assignment: Create an Internet and E-mail Acceptable Use Policy Learning Objectives and Outcomes Research and compare Internet and e-mail use policies enforced by other organizations. Create an Internet OR e-mail use policy for an organization. Assignment Requirements You are a networking intern at Richman Investments. An employee of the company used employer-owned equipment to access the Internet and check his personal Web-based e-mail account. He followed a…

    • 451 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Lab 4

    • 327 Words
    • 2 Pages

    Assessment Worksheet 65 Lab #4 – Assessment Worksheet Configure Group Policy Objects and Microsoft® Baseline Security Analyzer (MBSA) Course Name and Number: Student Name: Dennis Dobbins Instructor Name: P Butu Lab Due Date: 10/8/13 Overview In this lab, you used group policy objects to create a minimum password length password policy and link it to the newly created domain from the previous lab. You also ran the Microsoft® Baseline Security Analyzer (MBSA) and reviewed…

    • 327 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Lab 4

    • 506 Words
    • 3 Pages

    Lab 4 Tissues Purpose: The purpose of this lab is to disover Histology or the study of tissues. Tissue make up a large part of our bodies and in this lab we will learn about the different types and functions of tissues. Hypothesis: I believe at the end of this lab If I am willing to do the reasearch the I will be able to use a mircoscope to look at different tissue samples and learn about the many types of tissue cells and their functions. Materials: The internet Book:Human Antomony…

    • 506 Words
    • 3 Pages
    Good Essays
  • Good Essays

    4 Lesson4 Worksheets

    • 1218 Words
    • 7 Pages

    Lesson 4 Forensic Dentistry Pre-lesson Reading Forensic Science Forensic science is the scientific examination of evidence in a criminal investigation. Forensic Dentistry or Odontology Forensic dentistry or forensic odontology is a branch of forensic science which deals with the collection, evaluation and proper handling of dental evidence in order to assist law enforcement officers and to assist in civil and criminal proceedings. Major Services of Forensic Dentistry a) Identification of deceased…

    • 1218 Words
    • 7 Pages
    Good Essays
  • Good Essays

    lab 4

    • 503 Words
    • 2 Pages

    Lab #3 - Assessment Worksheet Enabling Windows Active Directory and User Access Controls Course Name and Number: Networking Security Fundamentals Student Name: Instructor Name: Prof. Lab Due Date: Overview In this lab, you followed the Microsoft approach to securing the CIA triad. You created new user accounts and security groups, and applied the new user accounts to the security groups, just as you would in a real world domain. You created nested folders on the remote server and assigned…

    • 503 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Deserts Lab Worksheet

    • 348 Words
    • 2 Pages

    Material Week Four Deserts Lab Report Week Four Deserts Lab Report Answer the lab questions for this week and summarize the lab experience using this form. Carefully read ch. 15 of Geoscience Laboratory. Complete this week’s lab by filling in your responses to the questions from the Geoscience Laboratory. Select answers are provided for you in red font to assist you with your lab work. Although you are only required to respond to the questions in this worksheet, you are encouraged to answer…

    • 348 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    lab 5 worksheet

    • 289 Words
    • 2 Pages

    Lab 14 Worksheet (52 points) Exercise 14.1 1. How can you find out which port Windows Firewall opened up on NYC-CLb? (4 points) Exercise 14.1 step 18 Take a screen shot of the Add or Remove Snap-ins dialog box, showing the two Event Viewer instances you added, by using the Snipping tool. (4 points) Exercise 14.2 2. When using Remote Assistance, why might it be necessary to impose a time limit on the invitation? (5 points) Exercise 14.3 Exercise 14.3 step 15 Take a screen shot of…

    • 289 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Week 4 Worksheet

    • 738 Words
    • 3 Pages

    University of Phoenix Material Week Four Worksheet Match the Definitions on the left to the correct Terms on the right by entering the correct corresponding alphabetical letter next to the numbers in the first column. Not all terms will be used. | | Definitions | Terms | | | | | 1. | h | Engaging in sexual activities for something of value | A. Disorderly conduct B. Breach of peace C. Loitering D. Treason E. Perjury F. Contempt G. Obscenity H. Prostitution…

    • 738 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Because it is subjective, based on opinions, no CBA, and no real standards. 3. What was your rationale in assigning “1” risk impact / risk factor value of “Critical” for an identified risk, threat, or vulnerability? Because it was the most serious risk. 4. When you assemble all of the “1” and “2” and “3” risk impact/risk factor values to the identified risk, threats, and vulnerabilities, how did you prioritize the “1”, “2”, and “3” risk elements? What would you say to the executive management in regards…

    • 339 Words
    • 2 Pages
    Satisfactory Essays