IB Biology Topic C4.1: Populations and Communities Notes

C4.1.1 Populations

4 minute read

C4.1.2 Estimation of population size by random sampling

7 minute read

C4.1.3 Random quadrat sampling to estimate population size for sessile organisms

7 minute read

C4.1.4 Capture–mark–release–recapture and the Lincoln index

7 minute read

C4.1.5 Carrying capacity and competition for limited resources

8 minute read

C4.1.6 Negative feedback control of population size by density-dependent factors

8 minute read

C4.1.7 Population growth curves

7 minute read

C4.1.8 Modelling of the sigmoid population growth curve

6 minute read

C4.1.9 Competition versus cooperation in intraspecific relationships

8 minute read

C4.1.10 A community as all of the interacting organisms in an ecosystem

5 minute read

C4.1.11 Herbivory, predation, interspecific competition, mutualism, parasitism and pathogenicity

6 minute read

C4.1.12 Mutualism as an interspecific relationship that benefits both species

8 minute read

C4.1.13 Resource competition between endemic and invasive species

12 minute read

C4.1.14 Tests for interspecific competition

10 minute read

C4.1.15 Use of the chi-squared test for association between two species

8 minute read

C4.1.16 Predator–prey relationships

5 minute read

C4.1.17 Top-down and bottom-up control of populations in communities

6 minute read

C4.1.18 Allelopathy and secretion of antibiotics

8 minute read