EEMB 2 Lecture Notes - Lecture 3: Behavior Modification, Intertidal Zone, Osmoregulation
15 Mar 2018
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Document Summary
Can occur between 2 or more organisms or species that exploit the same types of limited resources and live in the same geographical area. Competitive release: when species b is agsen, species a live in a wider range of habitat. If competition is strong, the geographic ranges of the two competitors may not overlap but have sharp boundaries. Can limit the distribution of organisms via 1. Behavioral modification of prey in the presence of predators. Top limiting factors in the distribution of life on earth are temperature and availability of water. Organisms have upper and lower lethal limits to physical and chemical factors. Solutionare acclimation or adaptation temperature -cells freeze below o and proteins of most organisms denature at temperatures above 45 degrees. Osmoregulation problems: lose or gain of water; water balance. Shark drinks water while freshwater fish pees water. Provides the energy that drives nearly all ecosystems-photosynthesis. The intensity and quality of light limit the distribution of photosynthesis organisms.
