- Lecture 13: Competition
o Particular types of interactions between populations
- Competition is everywhere
o Asterionella fornosa
o Synedra ulna
o Housing made out of silicates
- Diatoms require silicate
o Decrease populations means decreasing silicates
o Other diatoms might compete for silicate
o Silicate drops quickly when both species are there
Synedra stayed at the same level of populations as when grown by itself; there’s
something in them that allows for them to compete better
- Is competition limited to similar species?
o Is there competition between rodents and ants for seeds?
o Looking at feeding times?
o Limit the resources and see what they do?
- Results confirmed that there is competition between rodents and ants
o Do populations do better when alone?
Ant colonies increased by 71% compared to control plots
Rodent populations increased by 18% compared to control plots
o Do ants or rodents impact seed populations?
In plots without ants or rodents, seed density increased by 450%
o Does one population get less seeds when in the presence of the other?
Plots with only rodents or ants had about the same seed density as co