Biotic Interactions

Biotic Interactions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Abiotic Interactions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Density Independent Factors ,[object Object],The proportion that dies could be the same whether the population is dense or not - Forest Fire - Floods - Volcanic eruptions - Prolonged drought - Acid rain

Density Dependent Factors ,[object Object],[object Object],- Predation - Competition - Disease

Inter-specific and Intra-specific Interactions ,[object Object],INTER is competition between species e.g. GRAZING, PREDATION AND PARASITISM INTRA is competition within the species e.g. TERRITORIAL BEHAVIOUR, DOMINANCE, MATING, RESOURCES

Predation ,[object Object],[object Object],[object Object],[object Object]

Predator-Prey Relationship ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Predator-Prey Relationship ,[object Object],[object Object],[object Object],[object Object],[object Object]

Flexibility of the Predator ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cycling ,[object Object],[object Object],[object Object],[object Object]

Case Study: Snowshoe Hare and the Canadian Lynx ,[object Object],[object Object]

The Role of Predators in Maintaining Diversity in Ecosystems ,[object Object],[object Object],[object Object],[object Object]

Defences against predation ,[object Object],[object Object]

Prey Defences ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Camoflage ,[object Object],[object Object],[object Object],[object Object]

Cryptic Colouration ,[object Object],[object Object],[object Object]

Disruptive Coloration ,[object Object],[object Object]

Warning or Aposematic Coloration ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Batesian mimicry ,[object Object],The scarlet king snake on the left is the mimic, and the coral snake on the right is the poisonous one SCARLET KING SNAKE CORAL SNAKE "Red on yellow, kill a fellow. Red on black, won't hurt Jack."

Mullerian mimicry ,[object Object]

Grazing ,[object Object],[object Object],[object Object]

Apical and Basal Meristems ,[object Object],[object Object],[object Object]

Overgrazing ,[object Object],[object Object],[object Object],[object Object]

Grassland Habitats ,[object Object],[object Object],[object Object],[object Object]

Competition ,[object Object],[object Object],[object Object],[object Object],[object Object]

Interspecific vs Intraspecific competition ,[object Object],[object Object],[object Object]

Exploitation and Interference Competition ,[object Object],[object Object],[object Object]

Exploitation Competition ,[object Object],[object Object],[object Object],[object Object]

Gause’s experiment with Paramecium The two species of Paramecium used by Gause grew well by themselves but P. caudium was out competed by P. aurelia when the two were grown together

Interference Competition ,[object Object],[object Object]

Fundamental Niche and Realised Niche ,[object Object],[object Object],[object Object]

Case Study of Barnacle populations ,[object Object],[object Object]

Resource Partitioning ,[object Object],[object Object]

The Competitive Exclusion Principle Early in the twentieth century, two mathematical biologists, A.J.Lotka and V. Volterra developed a model of population growth to predict the outcome of competition Their models suggest that two species cannot compete for the same limiting resource for long. Even a minute reproductive advantage leads to the replacement of one species by the other

The Damaging Effects of Exotic Species ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Importance of Survival for Weak Competitors ,[object Object],[object Object],[object Object],[object Object],[object Object]

Biotic Interactions

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Biotic Interactions