BSCI 106 Lecture Notes - Lecture 4: Electroreception, Snowshoe Hare, Starfish

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 106
• Professor: Marcia Shofner

Document Summary

Density dependent: increased n influences b and d, thus influencing r, logistic growth formula, when n is large (with limiting resources), the term (k-n)/k will be small. Intraspecific: individuals of the same population/species compete for limiting resources. Interspecific: individuals of different species compete for the same limiting resources. Their niches overlap: competitive exclusion two species with identical niches cannot coexist, coexistence use of resources (niche) differ. Species living together use resources slightly differently, enabling them to coexist in a community: niche differentiation. Character displacement (e. g. ; darwin"s finches" beak size) Galapagos finches, warblers, etc: niche an n-dimension description of resources, habitat, and lifestyle of a species. Fundamental niche niche a species could potentially occupy in the absence of competition. Realized niche niche a species actually does occupy in the presence of competition. Interspecific competition leads to a decrease in each species" k: potentially to 0.