TABLE 3.
Model errors (ME) for the metrics that vary within the niche model (Williams & Martinez, 2008)
| Assembly | Predator–prey | Predator–prey + parasite–host | Predator–prey + parasite–host + predator–parasite |
|---|---|---|---|
| Longest chain | −1.50 | −3.00 | 0.00 |
| SD degree | −3.33 | −2.65 | −8.86 |
| SD generality | 0.75 | 2.75 | 3.50 |
| SD vulnerability | −7.65 | −4.25 | −14.69 |
| Minimum sum diet gap | −16.26 | −8.78 | −16.67 |
Notes: |ME| > 1 indicates that empirical metrics were significantly different from model predictions after standardizing for web size. Positive MEs indicate a metric was greater than predicted in the empirical food web. If empirical webs have MEs that differ by >1, this indicates that the metric varies between the webs.