Ecological Archives E087-023-A3

Lisa A. Levin, Carlos Neira, and Edwin D. Grosholz. 2006. Invasive cordgrass modifies wetland trophic function. Ecology 87:419–432.

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

 

15 N

SE

Lower

Upper

15 N

SE

Lower

Upper

15 N

SE

Lower

Upper

15 N

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.



[Back to E087-023]