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BISC 1005, Week 1

by: Jaimee Kidd

BISC 1005, Week 1 BISC 1005

Jaimee Kidd
GPA 3.6

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About this Document

Ecosystem Dynamics Part 2
The Biology of Nutrition and Health
Scully, T
Class Notes
25 ?




Popular in The Biology of Nutrition and Health

Popular in Biology

This 2 page Class Notes was uploaded by Jaimee Kidd on Saturday September 24, 2016. The Class Notes belongs to BISC 1005 at George Washington University taught by Scully, T in Fall 2016. Since its upload, it has received 4 views. For similar materials see The Biology of Nutrition and Health in Biology at George Washington University.


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Date Created: 09/24/16
Ecosystem  Dynamics  Part  2     Symbiosis   •   Often  mistaken  as  always  being  beneficial  interaction...   ◦   Two  or  more  organisms   ◦   Live  in,  on  or  around  one  another   ◦   Very  close  association  at  some  point  in  their  lifecycle    Who  Is  My  Friend?   •   Competition   ◦   -­‐/-­‐  Interaction   ◦   Where  both  species  are  harmed   ◦   Niche   ▪   Sum  total  abiotic  and  biotic  needs  of  a  species/population  to  survive  and   reproduce   ◦   Both  species  cannot  be  as  successful  as  they  would  in  the  other’s  absence   ▪   Relative  to  food  production   ▪   Competition  between   ▪   Cops/native  species   ▪   Animals  bred  for  food/native  species   ▪   Why  Do  Farmers  Use  Antibiotics?   ▪   Growth  rate  increases  giving  farmers  the  ability  to  sell  meat  faster   ▪   Why  Is  This  Potential  Harmful?   ▪   Potentially  exposes  other  animals  to  dangerous   proteins  (i.e.  mad  cow  disease)   ▪   Antibiotic  resistance     •   Exploitation   ◦   +/-­‐  interaction   ◦   Where  one  species  benefits,  other  is  harmed   ◦   Exploiters  are  generally  consumers  falling  into  three  main  categories:   ▪   Herbivores:  eat  plants  or  plant  parts   ▪   Predators:  kill  other  animals  (prey)  for  food   ▪   Parasites:  live  in  or  on  the  organisms  they  eat   ▪   Parasitism   ▪   Pathogens:   ▪   Disease-­‐causing   •   Commensalism   ◦   +/0   ◦   Where  one  species  benefits  at  no  cost  to  the  other   •   Mutualism   ◦   +/+  interaction   ◦   Where  both  species  benefit   ◦   Increasing  the  survival  and  reproduction  of  both  of  the  interacting  species   ▪   Gut  inhabitant   ▪   Seed  dispersal   ▪   Pollinator   ▪   Behavioral     ▪   Protection   •   Micro  biome   ◦   All  the  organisms  which  live  in  symbiotic  relationships  with  humans   ▪   Changes  constantly   ▪   Every  aspect  of  your  life  impacts  the  diversity   ▪   What  does  it  affect?   ▪   Digestion/Absorption   ▪   Immune  system-­‐  allergies,  autoimmune  diseases  and  general   defense   ▪   Development   ▪   Stress/psychological  issues   ◦   Changing  Roles   ▪   Switch  hitters   ▪   Transitions  between  one  type  of  species-­‐species  interaction  to   another   ▪   Ex.  Commensalism  to  exploitation      


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