15N signatures of macrofauna exposed to different parts of 15N-labeled Spartina foliosa in litter bags for 50 days.Appendix C. 15N signatures of macrofauna exposed to different parts of 15N-labeled Spartina foliosa in litter bags for 50 days.
|
ROOTS |
|
|
|
CULMS |
|
|
|
GREEN BLADES |
|
|
|
DEAD BLADES |
|
|
|
|||||
Taxon |
Average |
|
Percent uptake |
Average |
|
Percent uptake |
Average |
|
Percent uptake |
Average |
|
Percent uptake |
|||||||||
|
|
SE |
Lower |
Upper |
|
SE |
Lower |
Upper |
|
SE |
Lower |
Upper |
|
SE |
Lower |
Upper |
|||||
Anthozoa |
|
|
|
|
18.53 |
|
0.10 |
0.19 |
29.52 |
|
0.44 |
0.53 |
|
|
|
|
|||||
Capitella sp. |
84.57 |
17.46 |
2.17 |
2.26 |
18.53 |
8.48 |
0.10 |
0.19 |
89.83 |
29.7 |
2.33 |
2.43 |
32.28 |
10.06 |
0.53 |
0.64 |
|||||
Corophium sp. |
18.48 |
0.68 |
0.09 |
0.19 |
20.65 |
|
0.16 |
0.26 |
21.57 |
2.52 |
0.19 |
0.28 |
14.26 |
|
0.00 |
0.07 |
|||||
Cumacea |
|
|
|
|
|
|
|
|
23.39 |
4.57 |
0.25 |
0.34 |
|
|
|
|
|||||
Eteone dilatae |
18.77 |
|
0.10 |
0.20 |
31.18 |
4.1 |
0.49 |
0.59 |
23.39 |
1.77 |
0.25 |
0.34 |
19.98 |
|
0.14 |
0.25 |
|||||
Gemma gemma |
18.46 |
|
0.09 |
0.19 |
|
|
|
|
18.65 |
|
0.10 |
0.19 |
|
|
|
|
|||||
Hemigrapsus oregonesis |
|
|
|
|
18.82 |
|
0.10 |
0.20 |
20.95 |
|
0.17 |
0.26 |
|
|
|
|
|||||
Macoma petalum |
|
|
|
|
|
|
|
|
26.46 |
4.85 |
0.34 |
0.44 |
|
|
|
|
|||||
Musculista senhousia |
15.20 |
|
0.00 |
0.08 |
|
|
|
|
|
|
|
|
|
|
|
|
|||||
Nereis succinea |
24.53 |
2.00 |
0.28 |
0.38 |
97.89 |
46.5 |
2.59 |
2.68 |
88.28 |
30.1 |
2.29 |
2.38 |
29.93 |
9.52 |
0.45 |
0.56 |
|||||
Traskorchestia traskiana |
18.51 |
|
0.09 |
0.19 |
|
|
|
|
|
|
|
|
|
|
|
|
|||||
Ostracod sp. a |
|
|
|
|
|
|
|
|
24.43 |
|
0.28 |
0.37 |
|
|
|
|
|||||
Polydora cornuta |
|
|
|
|
17.84 |
|
0.07 |
0.17 |
|
|
|
|
|
|
|
|
|||||
Polydora spp. |
|
|
|
|
|
|
|
|
33.68 |
|
0.57 |
0.66 |
|
|
|
|
|||||
Streblospio benedicti |
17.64 |
|
0.07 |
0.16 |
27.13 |
3.23 |
0.37 |
0.46 |
27.68 |
2.36 |
0.38 |
0.48 |
20.5 |
0.86 |
0.16 |
0.27 |
|||||
Tanaid |
|
|
|
|
15.59 |
|
0.00 |
0.10 |
|
|
|
|
|
|
|
|
|||||
Tharyx sp. |
|
|
|
|
|
|
|
|
16.85 |
|
0.04 |
0.14 |
20.89 |
|
0.17 |
0.28 |
|||||
Tubificidae |
|
|
|
|
333.52 |
115 |
9.99 |
10.07 |
71.92 |
|
1.77 |
1.86 |
17.3 |
|
0.06 |
0.17 |
|||||
Urosalpinx cinerea |
15.31 |
1.91 |
0.00 |
0.09 |
|
|
|
|
|
|
|
|
17.3 |
|
0.06 |
0.17 |
|||||
Venerupis philippinarum |
|
|
|
|
11.77 |
3.43 |
0.00 |
0.00 |
15.12 |
1.58 |
0.00 |
0.08 |
|
|
|
|
|||||
Mean |
25.72 |
2.662 |
|
|
55.59 |
13.5 |
|
|
35.45 |
3.24 |
|
|
21.56 |
|
|
|
|||||
Notes: Data are mean values and 1 SE for each species. A two-source mixing model is used to estimate % of N derived from labeled Spartina detritus, assuming a trophic shift of 3.5‰. An upper estimate is based on the low range of natural 15N in the system (8‰) and a lower estimate is based on food sources with the higher 15N (12‰). Values in bold highlight >2% 15N in tissues from derived from labeled detritus.
15 N