lecture 9 Flashcards Preview

Lecture 7 Bio 228 > lecture 9 > Flashcards

Flashcards in lecture 9 Deck (18):
1

Eologically sustainable economy

sustainable devlopment while maintaining biodiversity

2

Exponential growth observed only when

allmost extinct populations recover or when new habitats are being colonized

3

Per capita growth rate of small mammals decrease when

density increceases

4

Allee effect

Growth rate may decrease when population size decreases

5

Examples of allee effect

mate location, habitat alteration, cooperative feeding, cooperative defence

6

Fecundity

reproductive capacity

7

Determinate growth

fecundity constant- cease to grow after maturity

8

interderminate growth

fecundity increases with age and byond maturity

9

semelparous

reproduce once then die (annual plants)

10

iteroparous

reproduce more then once in their life time (perennial plants)

11

Advantage and disadvantage of semelparous

Advan. ability to invest all resources to new generation
Disadvan. Reproduction is a one time advent with risk to loose all

12

Exploitation competition

When two species grow together the carrying capacity is reduced for both species compared to pure populations

13

Community

group of organisms that live to gether at the same place/ time and interact directly/ indirectly

14

Discrete/ continuous organization

transition called ecotones

15

abrubt transition

coninsides with steep gradients/ changes in land

16

organismal community concept

clements
closely intergrated entity of mutually interdependent organisms with discrete borders
predictable end-point: Climax community
Discrete units pargmatic for applied disciplines

17

individualistic community concept

Gleason individualistic distrubution patterns along gradients resulting in continuous change of composition

18

Shannon Diversity & evenness

diversity influenced by richness(#) and evenness(pi)