BIOL 111 Lecture Notes - Lecture 4: Hydrothermal Vent, Hydrogen Sulfide, Detritivore
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4. 2 to eat or what to eat . Learning outcomes: identify the energy sources of different groups of organisms, arrange organisms into a food chain or food web, predict the consequences of food web perturbation. Reminders: new group assignment (#2) on food webs will be due wednesday oct 7th. Ecologically, there are two ways of obtaining energy (aka food). Bring 4. 1 notes as we will see look at a few questions from the fish case study. A practice exam will be posted in connect to help you study for your midterm. Autotrophs (self- feeders) vs heterotrophs (feeding from others) Photoautotrophs obtain energy from the sun creating chemical bonds between carbon atoms forming energy rich sugar molecules. Archaebacteria) called chemoautotrophs obtain energy by performing particular chemical reactions to make organic carbon compounds eg. bacteria near hydrothermal vents obtain energy from hydrogen sulfide (h2s gas released by the vents). Heterotrophs are further categorized by their means of acquiring energy.
