Intraspecific Population Regulation Flashcards
Define ecology competitions
3
Competition
Contest competition
Scramble competition
Define competition
Mutual detrimental interaction
Limited resources
Define contest competition
- Interference competition
- Individuals interact directly
- some obtain resources they don’t need
- others don’t reproduce or die
Define scramble competition
- Exploitative competition
- individuals react to the level of resources
- sharp fluctuations in population
- on average lower population densities than contest competition
What are some reasons for competition?
- Mates
- resources
- territory (Gain/defend)
- dominance
- defending offspring
Territorial communication: how? What?
Vocal
Visual
Chemical
Electric
Example of vocal communication
Warnings and welcomes - territorial -mating (come at me, I'm thirsty) - direction (hey I'm going this way) Eg) Goshawk Begging and warning calls Hey fuck off Hey feed me
Example of visual communication
Facial (dominance)- bared teeth
Coloration- mating/dominance - I have pretty colours, come fuck me
Visual markers in habitat
- hey that’s my space (tree bark removal)
- distribution of poo in special piles
Examples of chemical communication
Plant allopathy
-plants poisoning other plants in order to kill/retard competing plants eg) honey suckle
Animals- pheromones to attract others
Eg) IMB orgy party- I found a dope tree come have sex and eat with me
Example of electric communication
Fish use their electro receptors to sense heir surroundings and to communicate within the same species
What are some environmental factors that affect competition within populations?
Temperature
-increase in temp increase pheromones and increase populations
Eg) IMB
Water availability
-more more more
Habitat alteration
-fragmentation
Eg) affect of clearcut or devastation
