BIOC58H3 Lecture Notes - Lecture 9: Sibilant, Turkey Vulture, Abscissa And Ordinate

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orangeherring876

14 Feb 2011

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I came across this quote in the economist the other day. There are places in australia which is one of the bread baskets" in the world and in some places it hasn"t rained in 13 years. New south whales had a little rain so he borrowed money to plant his crop and now he has a problem. There is no rain and that is devastating. Also i checked the weather network the other day and they have something called climate change" and it is put up by david suzuki. He has an interesting analogy and i suggest you take a look at it. It says that the evidence is overwhelming that climate change is happening. It say that we are all in a car and heading for a brick wall and the car is speeding up and the point is that everyone in the car is arguing about where they are sitting.

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Need a 150 word discussion response to the following discussion post.

Overpopulation of the planet is not something that we are at risk of. Over population is even considered a myth based on the work Rev. Thomas Malthus. Rev. Thomas Malthus was an English cleric and scholar who had many influences in the field of political economy and demography (UCMP Berkeley, 2016). Malthus believed that food production increased incrementally and people reproduce exponentially. Based on his calculations he estimated that he world would run out of food in 1890. This led him to suggest that it would be in the best interest of the world to get rid of the worst of the population. Then in 1968 Paul Ehrlich, who was an American biologist from Stanford university, took on the same argument of the consequences of population growth (Too Many People, Too Much Consumption, 2016). He believed that reckless human reproduction had overwhelmed the earth and there would be famine. This would result in the death of one fifth of the population by the end of the 1970âs.

However, based on the information from the U.S. Census, the worldâs population is 7,344,149,500 as of August 13, 2016 at 4:00pm (Iinternational Programs, 2016). We can take everyone in the world and fit them in the great state of Texas, which has a landmass of 268,820 square miles (7,494,271,488,000 square feet). If we can divide 7,494,271 square feet by 7,344,149,500, you get 1020.44 square feet per person. That means that each person can live comfortably in Texas in a plot the of land that is the size of a small apartment.

Reference:

International Programs. (n.d.). Retrieved August 13, 2016, from http://www.census.gov/population/international/

Thomas Malthus (1766-1834). (n.d.). Retrieved August 13, 2016, from http://www.ucmp.berkeley.edu/history/malthus.html

Too Many People, Too Much Consumption. (n.d.). Retrieved August 13, 2016, from http://e360.yale.edu/feature/too_many_people_too_much_consumption/2041/

graygoose99

Global Warming: Carbon Dioxide and its Effects on Agriculture Many scientists understand that earth is getting warmer and that the cause could be an intensified greenhouse effect resulting from increased CO2 emissions from industry, vehicles, and the burning of forests. Increased carbon dioxide levels will also affect the nutritional quality of many crop plants by decreasing protein content and increasing weed growth. Global warming could influence agriculture and perhaps even completely melt polar ice, leading to flooding of coastal regions. Over 90% of scientists now agree that global warming is occurring. In response to this potential threat, several European countries, the United States, Australia, and New Zealand have made a commitment to significantly reduce carbon dioxide emissions. However, some countries oppose taking strong actions at this time and the U.S. has only met a relatively small proportion of its commitments. Several reasons are cited. First, some experts think the apparent warming trend may be just a random fluctuation in temperature. Second, if the temperature increase is real, some argue that it has yet to be proven that the cause is increased CO2. However, regardless of the effects on climate change, the carbon fertilization effect of increased CO2 levels is affecting crops each year. Some believe it would be difficult to cut CO2 emissions without sacrificing comfort, convenience, and economic growth. Carbon Dioxide as a Greenhouse Gas: http://www.epa.gov/climatechange/ghgemissions/gases/co2.html Effects of Carbon Fertilization of Crop Plants: http://www.news.ucdavis.edu/search/news_detail.lasso?id=9479 http://news.illinois.edu/news/14/0507CO2_AndrewLeakey.html http://news.heartland.org/newspaper-article/2013/10/29/carbon-dioxide-emissions-stimulating-15-trillion-crop-production Please consider and reply to the questions below: Do you think we should have more evidence that greenhouse warming is real before taking action? Or is it better to play it safe and act now to reduce CO2 emissions? The evidence of carbon fertilization of crop plants is readily available and accepted. Crop plants are producing less seed and less protein. Weed plants are overgrowing crop plants and reducing annual yields. Should we take action now to reduce CO2 emissions in order to prevent the loss of agricultural output and nutritious crops?

aquamarinealligator170

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).

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BIOC58H3 Lecture Notes - Lecture 9: Sibilant, Turkey Vulture, Abscissa And Ordinate

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