1. Food Webs

2. Part 1: How do parasites affect the topology of a pond food web?
Quick Pond

4. 13 Parasite Species Halipegus Echinostoma Ribeiroia ondatrae
Plagiorchid Megalodiscus Alaria

5. Quick Pond Food Web

6. Web Metrics 962 total links 386 links involving parasites
(40% of total)
Subweb
Possible Links
Observed Links
Connectance
Linkage Density
Predator/Prey
2304
576
0.25 12
Host/Parasite
624 79
Predator/Parasite
271
Parasite/Parasite
169 36
Predator/Prey + Host/Parasite
2928
655
Total
3721
962

7. Food Webs

8. Food Webs

9. Top Predators
Secondary Consumers
Primary Consumers
Primary Producers

10. Questions
1.) What would happen if all the primary producers died? 2.) What about if the top predators disappeared? 3.) What about if there was a population explosion of mice?