GEOG-120 Lecture Notes - Lecture 26: Logistic Function, Maximum Capacity, Food Energy
Every population eventually is constrained by limiting factors physical, chemical and biological characteristics of the environment that restrain population growth. Density-independent factors are limiting factors whose in uence is not affected by population density ( oods, res) if limiting factors change as a result of environmental change, the carrying capacity fora species may increase or decrease. Biotic potential is the maximum capacity to produce offspring under ideal environmental conditions. K-selected population tend to stabilize over time near the carrying capacity. R-selected focus on quantity; high biotic potential and produce as many offsprings as possible in short time. The energy comes from the sun via photosynthesis; organisms fees on one another, this energy moves through the community from one rank in the feeding hierarchy, or trophic level, to another. Producers or autotrophs compose the rst trophic level; A community that resist change and remain stable despite disturbance shows resistance.