Table 1. Mean decay class 1 fine woody debris (FWD) and coarse woody debris (CWD) nutrient concentrations pooled across species and FWD nutrient concentrations for each species by decay class. Standard errors are in parentheses. Carbon is presented in percent total (%), while all other nutrients are in mg kg–1. Sample sizes are n = 50 for decay class 1 FWD and CWD nutrient concentrations within each group and n = 10 for FWD nutrient concentrations within each species/decay class combination. Within each row, values with similar letters are not significantly different (p > 0.05) for decay class 1 FWD and CWD nutrient concentrations pooled across species and separately for FWD nutrient concentrations by species and decay class. | ||||||||||||
Nutrient | Size | Species | ||||||||||
FWD | CWD | Populus tremuloides | Acer rubrum | Betula papyrifera | Fraxinus nigra | Abies balsamea | ||||||
Decay class | Decay class | Decay class | Decay class | Decay class | Decay class | |||||||
1 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | ||
C | 50.9 (0.2)a | 48.6 (0.2)b | 50.8 (0.4)bc | 51.1 (0.1)bc | 49.5 (0.2)d | 49.7 (0.2)d | 52.2 (0.4)ab | 53.5 (0.6)a | 49.7 (0.1)d | 50.5 (0.2)cd | 52.1 (0.5)ab | 51.8 (0.4)ab |
N | 1821 (334)a | 275 (73)b | 3583 (447)a | 1622 (321)ab | 378 (317)b | 976 (356)ab | 2365 (921)ab | 3711 (1053)ab | 1790 (849)ab | 2486 (782)ab | 991 (696)b | 1570 (800)ab |
P | 465 (41)a | 125.9 (7.5)b | 649 (90)a | 172 (15)d | 325 (41)abcd | 198 (24)cd | 539 (111)ab | 351 (40)abc | 409 (102)abcd | 211 (29)cd | 403 (80)abc | 330 (83)bcd |
K | 2336 (180)a | 1704 (143)b | 2555 (306)ab | 718 (135)c | 1424 (115)bc | 754 (248)c | 1526 (235)bc | 842 (136)c | 3984 (353)a | 1459 (312)bc | 2191 (351)ab | 1601 (369)bc |
Ca | 5539 (390)a | 3185 (247)b | 8628 (951)a | 7699 (1181)ab | 4346 (644)bc | 5333 (858)abc | 4840 (477)abc | 7829 (894)ab | 5766 (425)abc | 5653 (489)abc | 4115 (958)c | 5206 (1004)abc |
Na | 30.1 (1.8)a | 26.0 (1.7)a | 35.6 (3.0)ab | 35.5 (4.3)ab | 30.9 (3.9)ab | 27.4 (3.9)ab | 37.9 (4.4)a | 40.6 (5.4)a | 21.0 (3.9)b | 30.8 (3.2)ab | 25.2 (3.3)ab | 35.3 (5.2)ab |
Mg | 558 (37)a | 338 (16)b | 866 (98)a | 474 (34)b | 405 (51)b | 412 (48)b | 500 (56)b | 561 (76)ab | 605 (57)ab | 593 (89)ab | 416 (56)b | 576 (70)ab |
Mn | 101 (14)a | 69.2 (8.5)a | 25.5 (3.2)c | 20.8 (3.1)c | 222.7 (18.6)a | 237.9 (39.4)a | 144.5 (20.7)ab | 200.9 (26.6)a | 11.3 (1.5)c | 20.2 (2.5)c | 99.5 (31.8)b | 256.7 (42.1)a |
Al | 21.9 (5.7)a | 7.0 (1.2)b | 8.6 (2.5)c | 26.7 (8.6)bc | 19.9 (6.4)bc | 21.7 (4.2)abc | 6.8 (1.7)c | 36.9 (6.5)ab | 15.4 (3.3)bc | 43.0 (8.5)ab | 58.6 (25.0)ab | 110.3 (36.9)a |
B | 7.7 (0.5)a | 3.4 (0.2)b | 9.4 (0.9)abc | 6.2 (0.8)bcd | 7.7 (1.1)abcd | 6.0 (0.8)bcd | 5.7 (0.7)cd | 6.6 (0.8)abcd | 10.6 (1.2)ab | 13.0 (2.9)a | 5.1 (0.9)d | 4.4 (0.8)d |
Cu | 3.8 (0.4)a | 1.6 (0.1)b | 6.4 (1.4)c | 5.1 (0.9)bc | 2.4 (0.2)a | 2.8 (0.3)ab | 2.9 (0.4)abc | 4.0 (0.6)abc | 4.1 (0.9)abc | 5.3 (1.1)bc | 3.0 (0.2)abc | 3.0 (0.5)abc |
Fe | 27.1 (4.7)a | 18.4 (2.8)b | 16.9 (3.4)b | 39.3 (11.3)ab | 35.7 (6.0)ab | 34.9 (6.1)ab | 13.5 (3.0)b | 46.6 (8.2)ab | 30.0 (6.4)ab | 76.7 (14.2)a | 39.1 (21.3)ab | 104.0 (38.9)a |
Zn | 56.6 (8.0)a | 28.2 (3.8)b | 87.9 (8.3)ab | 88.7 (10.9)ab | 16.2 (2.3)de | 19.4 (2.6)cde | 130.9 (18.4)a | 173.4 (26.9)a | 10.2 (3.2)e | 14.0 (3.6)e | 37.6 (11.6)cd | 56.3 (18.8)bc |