Table 2. 2012 and 2016 predator and parasitoid abundance.
| 2012 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Species | Origin | n | Predators | BH | Parasitoids | BH | ||
| Acer palmatum | exotic | 14 | 1.93 | (1.03) | – | 22.36 | (4.57) | – |
| Acer platanoides | exotic | 10 | 2.00 | (0.77) | – | 33.50 | (5.93) | – |
| Acer rubrum | native | 10 | 0.90 | (0.31) | – | 22.90 | (3.61) | – |
| Acer saccharum | native | 10 | 0.90 | (0.59) | – | 30.50 | (15.49) | – |
| Quercus acutissima | exotic | 15 | 1.26 | (0.29) | – | 24.49 | (1.77) | a |
| Quercus alba | native | 15 | 1.64 | (0.37) | – | 42.58 | (4.37) | b |
| Quercus phellos | native | 15 | 3.25 | (1.16) | – | 67.03 | (7.27) | c |
Note:
Mean predator and parasitoid wasp abundance per 7-day sample from sticky cards in 2012 (top) and 2016 (bottom), reported as mean (± standard error) with n indicating the number of trees. Predator tests were performed separately from parasitoid tests for each year-genus pair. Within each year-genus pair, tree species that share a letter are not different (α = 0.05) based on a Kruskal–Wallis test with a Benjamini–Hochberg (BH) post hoc comparison. Letters are provided only when the overall Kruskal–Wallis test indicated a significant difference between species. Tree species are ordered alphabetically within each year-genus pair.