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Ecology 1000 Week 2

by: Jennifer Veliz

Ecology 1000 Week 2 ECOL 1000

Marketplace > University of Georgia > Business > ECOL 1000 > Ecology 1000 Week 2
Jennifer Veliz

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About this Document

These notes cover week 2 of Ecology 1000
Environmental Issues
Dr. Scott Connelly
Class Notes
Ecol 1000
25 ?




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This 3 page Class Notes was uploaded by Jennifer Veliz on Sunday January 24, 2016. The Class Notes belongs to ECOL 1000 at University of Georgia taught by Dr. Scott Connelly in Winter 2016. Since its upload, it has received 27 views. For similar materials see Environmental Issues in Business at University of Georgia.


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Date Created: 01/24/16
Ecology  1000,  week  two     Population       • The  higher  the  birth  rates  among  younger  women,  the  shorter  generations   times.  This  means  that  these  children  will  grow  up  and  reproduce,  which  in   return  means  that  the  population  size  increases  significantly.   • Life  tables-­‐  Statistics  relating  to  the  age-­‐  specific  schedules  of  survival  and   reproduction.     These  include:   Age   Number  alive   Probability  of  survival  between   Mortality  rate   Fecundity  (reproduction  outcome)   • Cohort-­‐  Same  age  group     • The  exponential  model  of  growth  (dN/dt  =  rN)  assumes:   -­‐Resources  such  as  food  and  space  are  unlimited   -­‐Constant  environment  (no  variation  in  season)     • Population  size  must  be  controlled.  Which  is  why  there  is  a  carrying  capacity.   • Carrying  capacity-­‐  Number  of  organisms  an  environment  can  support   without  the  organisms  destroying  resources  for  future  generations.     •   dN   =  rN  (1-­‐N/K)   dt       The  equation  is  to  reduce  population  growth  as  it  approaches  carrying  capacity,   N=population  size,  K=  carrying  capacity,  r=rate  of  growth  per  capita.     • As  population  approaches  carrying  capacity,  rN  is  multiplied  by  a  small   number,  which  slows  down  the  growth  rate.   • Population  size  should  decrease  once  it  reaches  carrying  capacity.     • Once  population  reaches  carrying  capacity,  the  environment  has  more   resistance  on  supporting  the  population,  which  causes  the  population  to   decrease.     What  factors  control  population  growth  or  size?   • Density-­‐dependent  factors-­‐  the  growth  depends  on  current  population  size.   -­‐Resource  availability   -­‐Competition   -­‐Disease   • Density  independent  factors-­‐  these  affect  growth  regardless  of  population   size   -­‐Temperature   -­‐Precipitation   -­‐Catastrophic  disturbances   • Regulation-­‐  Tendency  of  population  to  increase  or  decrease  above/below  a   certain  level.   • Population  can  only  be  regulated  by  density-­‐dependent  factors.       Ecosystem  services  &  Environmental  economics     Ray  Anderson-­‐  Video  for  business  case  sustainability     v 1994  Atlanta-­‐based  Interface  Carpet  leader   v Petroleum  based  carpets  (cause  air  and  water  pollution)   v Although  the  company  would  have  6  tons  of  landfill  waste  per  day,   they  complied  with  environmental  laws   v After  reading  “The  Ecology  of  Commerce”  by  Paul  Hawken,  Ray  had  an   epiphany.   v Ray  said,  “You  can’t  go  on  consuming  more  than  your  environment  is   able  to  renew.  We’re  on  the  wrong  side  of  history,  and  we’ve  got  to  do   something”   v Ray  then  increased  his  company’s  profit  by  making  a  more  productive   company  while  doing  well  to  the  environment.       • Ecological  footprint-­‐  land  needed  to  provide  resources  and   assimilate  waste   -­‐Its  determined  by  its  size,  and  amount  of  resources  used  per  person.     -­‐If  everyone  in  the  world  lived  like  people  in  USA,  we  would  need  4  planets  to   do  so.     • Natural  capita-­‐  range  of  natural  resources  provided  by  ecosystems.     • Ray  recognized  that  we  can’t  use  our  natural  capita  quicker  than  it  is   being  replaced.     -­‐His  goal  was  to  build  a  sustainable  environment,  meaning  that  living   your  life  with  a  certain  standard  will  not  affect  other  generations.   -­‐His  pathway  to  achieving  his  goal:   1. Eliminate  waste   2. Benign  emissions     3. Renewable  energy   4. Closing  the  loop   5. Efficient  transportation   6. Sensitizing  stakeholders  (train  and  educating  people)   7. Redesigning  commerce  (look  at  how  a  business  is  done   traditionally  and  then  change  it)   • The  Well-­‐being  of  humans  depends  on  maintaining  ecological  system   functions.     • Ecosystem  services-­‐  Conditions  and  processes  of  natural  ecosystems   and  species  that  provide  some  human  value.        


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