BIOC58H3 Lecture : Lecture 2

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orangeherring876

14 Feb 2011

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The lecture from last week is not on the intranet but the powerpoint presentation is. It was a good idea to get the pp lecture onto the intranet so i did that but today. I will try to have it on monday evenings or tuesday mornings. There will be a film and i would like for you to go if possible. There is a news week article on is climate change a hoax that i want you to read so we can discuss it. Tutorial information will be on the exam so i encourage you to go. You will get an in-depth grounding in terms of the state of the planet at the present time. There are many details in here and i expect you to know much of it. Some numbers will be important and some are just to add to your knowledge. You should know: concentration of the atmosphere -> co2, methane, nitrous oxide, etc.

Related Questions

You have been hired by Mike Sweeney, the Executive Director of TNC California to develop an executive report for him to present to his board help inform them about climate change and the marine environment for the state of California. He wants the report to provide a clear direction of what TNC California should be doing about climate change in the marine environment in California. Therefore, this summary must include the following:

- if you may please answer in an outline format and an implication of the following instructions will be greatly appreciated!!!!

A summary of the basic mechanism of global warming, including the primary greenhouse gases and their anthropogenic (human-produced) sources.

A review of the important likely (i.e. supported by the scientific literature) physical impacts that these global changes will cause to the marine environment at the regional level of the State of California.

A review of the important likely (i.e. supported by the scientific literature) ecological impacts that these global changes will cause to the marine environment at the regional level of the State of California.

A description of feasible and effective actions that the State of California is currently taking to mitigate greenhouse gas emissions.

A description of feasible actions that the State of California should undertake to enhance the resiliency of marine resources to climate change.

A review of critical knowledge gaps (what we need to know and understand) in our ability to understand and address climate change impacts in Californiaâs marine environment.

1.What is an ecological footprint? What is the greatestcontribution that you make to your footprint? How could you reduceit?

2. Are humans a keystone species? Support your answer.

3. Why does community connectedness matter?

4. Why does community change matter?

5. What kind of environmental features favor pioneer species,what kind favor climax/late succession species? What kinds ofadaptations favor pioneer species, and what kinds favor climaxspecies?

5. What do we mean when we say that landscapes are stable?

6. What would a community ecologist be able to learn from the USCensus?

7. What does evolution have to do with community ecology?

8. What role does disturbance play in ecology? Giveexamples.

9. You will be expected to be able to calculate species richnessand determine evenness and species diversity indices.

10. You will be expected to make a connection between carryingcapacity, population growth, and community succession in NewJersey.

11. What are the factors that can or could influence thecarrying capacity of NJ?

12. Rank the following three factors in terms of their impact onhuman carrying capacity: space availability, food availability,money availability.

13. Why are some invasive species more successful (i.e. havegreater fitness) in their introduced environment compared to theirnative environment?

14. What is global change about and how do our actions affectit? How is NJ going to be affected by global change?

15. Why, if it is summer in the southern hemisphere and winterin the northern hemisphere, do we see an overall increase in globalCO2 concentrations?

16. What is a dead zone and how is it created? What humanactivity (ies) help create a dead zone?

17. How would a fire that burns most of a forest affect theenergy, water, nutrient, and carbon cycles?

18. What are ecosystem services? Give an example of two.

19. Show how the energy and carbon cycles are inter-related.Explain what is happening in your diagram.

20. You need to be able to explain why nitrogen is important andwhy too much nitrogen is bad.

21. Which gas is more important for global warming:CO₂ or methane? Why?

22. What are the major carbon sinks and sources on earth?

23. What evidence do we have that CO2 concentration of theatmosphere has increased in the last 200 years and what evidence dowe have that that increase is due to human activity?

24. What is happening to our oceans in response to the increasein CO2 in the atmosphere. Be complete, there is more than one partto this answer.

25. How do we know that global warming is and will have animpact on populations, communities, and ecosystems?

26. Given what we know about Japanese knotweed, global change,and human activity, explain the interactions and consequences ofJapanese knotweed invasion on our water supply. You need toinclude, the physiology of the plant, the population ecology of theplant, the water cycle (ecosystems), and global change.

27. Regional climate change models predict that this area willget warmer and receive more rainfall. They also predict thatagriculture (i.e. growing plants) will suffer. Explain why. Becomplete in your answer. There are several factors at workhere.

28. Why are sea-levels increasing globally? Give a detailedanswer. What are some likely consequences going to be (other thanlosing land).

greywasp586

BIOCHEM LAB HELP:

here are our data :

concentration	absorbance
0.02mL	0.071A
0.04mL	0.090A
0.06mL	0.115A
0.1mL	0.156A
0.2mL	0.282A
0.3mL	0.357A
0.4mL	0.423A
0.6mL	0.626A
0.8mL	0.811A
1.0mL	1.040A
UMKNOWN	0.546

please answer all questions

Spectrophotometric Analysis of Protein

1. Provide the standard curve for your experiment and the calculation of the unknown concentration from absorbance.

2. Is the concentration of the unknown you calculated from your standard curve the same as the concentration of the unknown stock solution? Why or why not?

3. Explain the process through which the Biuret reagent complexes with proteins to produce the characteristic color.

4. Why is it important to condition your cuvette prior to each reading?

5. Why is it important to blank your spectrophotometer, prior to use?

6. The lab manual discusses how proteins have characteristic absorption at 275-280 nm due to the presence of tyrosine and tryptophan (to some extent phenylalanine as well) in addition to the absorbance that occurs at 190 nm. Why not simply measure the absorbance of our protein sample at this wavelength and forego the Biuret reagent entirely? Discuss this question in light of the information provided in your lab manual, your knowledge of protein structure, and limitations inherent to a teaching laboratory.

7. According to Beerâs law, the relationship between concentration and absorbance should be perfectly linear, as would be indicated by a linear regression (R^2) value of 1. However, often the regression value is less than one, indicating an imperfect correlation. Considering the possible limitations of the Beer-Lambert law, and give a detailed explanation as to why this result may have been observed.

burgundyspider872

BIOC58H3 Lecture : Lecture 2

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