DOC PREVIEW
Berkeley BIOLOGY 1B - Lecture Notes

This preview shows page 1 out of 4 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Biology 1B, Ecology Lecture 2, Page 1 Professor Resh • Spring 2011*Assigned readings, 8th Edition pp. 1148-1155, 1181-11957th Edition pp. 1080-1083, 1143-1146, 1152-1156Population GrowthOutline of Lecture 2A. EcologyB. Exponential GrowthC. Density dependent and independenteffectsD. Human Population growthE. Impact of human population onenvironmentA. Ecology1. Why does a particular kind of plantor animal live in one place and notanother?2. The examination of the physical andbiological variables that govern thedistribution of plants and animals.3. Study of the factors that control thenumbers of different kinds of plantsand animals.4. Set of principles by which weattempt to predict behavior ofassemblages of organisms.5. The study of the relationships oforganisms with one another, and withtheir environment.6. How does this differ from the“popular” view of ecology?Biology 1B, Ecology Lecture 2, Page 2 Professor Resh • Spring 2011*Assigned readings, 8th Edition pp. 1148-1155, 1181-11957th Edition pp. 1080-1083, 1143-1146, 1152-1156Population GrowthB. Exponential Growth(see Fig. 53.11 on p. 1183 in text, 8th Edit.)(see Fig. 52.10 on p. 1144 in text, 7th Edit.)1. The intrinsic rate of natural increaseof a population, r; the biotic potentialof a population.2. If dN/dt is the rate of change innumbers over time, its innatecapacity for growth, ri, can be usedto determine population growth asdN/dt =riN.3. r = difference between birth rate anddeath rate (per given number ofindividuals per unit time).4. A population ultimately stabilizes atthe carrying capacity K, withdN/dt = rN[(K-N)/K]5. Carrying capacity can be consideredas the number of different individualorganisms that the resources of agiven area can support.Biology 1B, Ecology Lecture 2, Page 3 Professor Resh • Spring 2011*Assigned readings, 8th Edition pp. 1148-1155, 1181-11957th Edition pp. 1080-1083, 1143-1146, 1152-1156Population Growth6. S-shaped, sigmoid, curve (logisticpopulation growth model)C. Density-dependent effects – factors thatincrease as a function of population sizeincreases.Density-independent effects – factorsthat operate regardless of population size.Long-term cycles often involve botheffects.What are examples of each of theseeffects?D. Human population growthBiology 1B, Ecology Lecture 2, Page 4 Professor Resh • Spring 2011*Assigned readings, 8th Edition pp. 1148-1155, 1181-11957th Edition pp. 1080-1083, 1143-1146, 1152-1156Population GrowthE. Three views of human populationgrowth:1. Neo-Malthusian position:Impact of human population= # of people X their affluence Xenvironmental effects of technology usedto achieve affluenceWhat is the difference in “Impact” of anindividual living in a developed comparedto an undeveloped country?2. “Marxist position”: When humanslack the basic means of subsistence,and when there is massive andpermanent unemployment, thenpoverty breeds overpopulationbecause larger populations arenecessary to survive.3. “Neo-conservative”: Humans haveomnipotent powers to extend re-sources; new technology more thancompensates for problems of havingadditional humans.- “Neo-Malthusians”: increasedhuman population causes a threat tothe environment.- We should accept neo-conservativeposition that more food must begrown and science must producesolutions; should accept Marxistposition that governments mustrespond wisely to population growth;should accept neomalthusian positionbecause of “impact”


View Full Document

Berkeley BIOLOGY 1B - Lecture Notes

Documents in this Course
Notes 1

Notes 1

4 pages

EVOLUTION

EVOLUTION

12 pages

Evolution

Evolution

12 pages

Load more
Download Lecture Notes
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Lecture Notes and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Lecture Notes 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?