Question 3

Question 3A# In a food web matrix there is one column for each consumer under study and one row for each studied resource (food item) for these consumers. Some consumers are food for other consumers. A 1 in column (3 row 1" means r. consumes 'r. The web shown has six consumers L,GH,H,R,JM and S, and six resources L: 0H, 61R1M and 3. An arrow from X to Y means X is consumed by Y. (Arrows have opposite meanings compared to the lecture example). A Food Web In a Grassland Ecowslem WIN! Flve Possible Food Chains (a) Write out the food web matrix for this web L CH H R M S (1)) Draw a niche overlap graph for this food web. L [For this graph, two consumers are adjacent G H if and only if they share a resource] C R M 8 Question 3B# A relation R C_: {1, 2, 3,4, 5}2 is dened by 2:39 {i} :1: 5 9+3 5 22:. (3.) Draw a digraph representing R. (b) Write out the adjacency matrix