Lecture 19/01/2017 Flashcards
1
Q
Density independent factors
A
a factor that has an effect on population (K) but has nothing to do with the population density (e.g., a severe weather event, fire, hurricane, volcanic eruption, etc.)
2
Q
Density dependent factors
A
(e.g., spread of disease - more vectors, faster spread)
Competition between species - what happens when you squeeze species together by limiting habitat area (i.e., hab. frag.)
Have a greater influence on population size (K)
3
Q
Population growth models (3):
A
Exponential (unlimited) Logistic (space-limited) - has nothing to do with being exponential or linear Monod growth (resource-limited) i.e., bacteria
4
Q
The use of fertilizers has accounted for over ___% of the increase in crop production since 1940.
A
50%
5
Q
What elements in fertilizers are causing eutrophication of lakes and water bodies?
A
N, P, (K)
