Lecture 1 - life cycles to life histories Flashcards Preview

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Flashcards in Lecture 1 - life cycles to life histories Deck (24):
1

Definition of organismal ecology

concerned with behavioural, physiological and morphological traits that mediate interactions between individuals, species and environment

2

Definition of population

a group of individuals of the same species living and interacting in a particular geographic area

3

Definition of population ecology

examines factors that limit and regulate population size and composition

4

Definition of community

consists of all the individuals of all the species that inhabit a particular geographic area

5

Definition of community ecology

examines interactions among populations

6

6 factors that drive distribution and abundance

birth, death, immigration, emigration, colonisation, extinction

7

unitary organisms

easy to recognise genetically separate individuals
their form is determinate - programmed from birth

8

modular organisms

growth is indeterminate
growth occurs by repeated production of modules
the individual genet is not dead until all of its modules are dead

9

definition of senescence

the process of deterioration with age

10

definition of semelparity

a reproductive pattern in which large numbers of offspring are produced in one reproductive event, after which the individual often dies
"big bang reproduction"

11

definition of iteroparity

reproductive pattern in which organisms produce several offspring during repeated reproductive episodes

12

definition of ephemeral

organism has a very short lifespan - most complete life cycle in <8 weeks

13

definition of a survival curve

a graph showing the proportion of a population living after a given age

14

R0 (diseases)

the number of people that one sick person will infect on average

15

generation time

average time between birth of individuals and birth of their offspring

16

generation time equation

XLxMx/R0

17

Px

survivorship of age x females to age x + 1

18

Fa

fertility

19

Birth pulse equation

PxMx+1

20

pre-breeding equation

P0Mx
P0= those surviving to age 1
no new borns counted

21

population growth can be increased by which 3 things?

1. increased survival
2. increased reproduction
3. decreased generation time

22

exponential population growth

a population of a few individuals
environment with no limiting factors
no restriction on available energy
no restriction on growth or reproduction

23

what does r mean?

the intrinsic rate of increase

24

definition of carrying capacity (k)

the maximum stable population size in a habitat that can be supported for a long period of time