BIOLOGY 173 Lecture Notes - Lecture 5: Limiting Factor, Commensalism, Fungicide
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Ecology = the interactions of an organism with other organisms and with its environment. Two-species interactions- outcome when both organisms are present. Org 2 no effect real world examples are never this simple. Oats seeds should be planted ~1. 5 inches deep; alfalfa & tomato one-quarter to one-eighth inch deep. Think about (discuss in lab) the expected results. How would you explain different outcomes? see whether hierarchy is linear (o>t>a) or circular (o>t, t>a, a>o) Lab set-up we"ll be testing three species in pairwise competition trials (oats, tomatoes, alfalfa) we"ll be using plant height and wet weight as crude measures of competitive effect. Each lab section receives 9 pots, 3 bags of seed, and 1 bucket of soil. Each lab should plant one full set of the 9 combinations below as directed: Adding 25 seeds of another species (25 oats vs. 25 oats+25 tom) Substituting 25 seeds of another species (50 oats vs. 25 oats+25 tom)
