Productivity

Question 1

Population

Answer 1

group of individuals of same species, potential to share the same gene pool

Question 2

Metapopulation

Answer 2

population of populations, implications for extinction/re-colonization

Question 3

Population dynamics

Answer 3

population changes in number and age structure through time

There are factors that keep populations changing

Question 4

Distribution

Answer 4

organisms often have specific habitat requirements or have their distribution regulated by water movements; both can lead to patchiness

Question 5

Exponential Population

Answer 5

(dN/dt) = rN 
N= population size 
t = time 
r = population growth coefficient (d-1)
r=b-d

Question 6

Limiting factors effect r

Answer 6

B=birth rate
d/g = death rate

Immigration and emigration are not as important in lakes and rivers

Question 7

Competition

Answer 7

Exploitative
I will eat all the donuts

Interference
I wont eat these donuts but you cant either

Question 8

NET PRIMARY PRODUCTION

Answer 8

NET GROSS PRODUCTION - RESPIRATION

Question 9

net heterotrophic vs net autotrophic

Answer 9

gross production P
Respiration R

When P/R < 1 = net heterotrophic

When P/R > 1 = net autotrophic

Question 10

Autochthonous VS Allochthonous

Answer 10

energy source from photosynthesis taking place within lake or stream (from phytoplankton, submerged or emergent aquatic plants)

imported from outside lake or stream (leaves or other organic matter from watershed)

Question 11

Ecological efficiency

Answer 11

How much energy is lost in each trophic level

between 6% and 20%

Question 12

BALANCED BIOENERGETIC MODEL

Answer 12

C = A + E
 A = G + R + U
C = energy consumed, 
E = egested energy, 
R = energy lost during respiration (metabolism), 
G = energy fixed as tissue as the animal grows and produces offspring; 
U = assimilated energy 
(A) that could not be used