Masaya Matsumura, Genevieve M. Trafelet-Smith, Claudio Gratton, Deborah L. Finke, William F. Fagan, and Robert F. Denno. 2004. Does intraguild predation enhance predator performance? A stoichiometric perspective. Ecology 85:2601–2615.

Appendix A. Carbon and nitrogen content (mean ± SEM % dry mass) and C:N ratio of salt marsh taxa (Order: Family) in four trophic groups: plants, herbivores, omnivores, and predators.   

Taxon	%N	%C	C:N
Plants: (n = 4)
Spartina alterniflora Loisel (Glumiflorae: Poaceae)	1.40 ± 0.13	42.56 ± 0.16	32.01 ± 3.25
Spartina patens Muhl. (Glumiflorae: Poaceae)	0.97 ± 0.05	42.99 ± 0.46	45.28 ± 3.03
Spartina cynosuroides Roth (Glumiflorae: Poaceae)	1.04 ± 0.03	43.70 ± 0.34	42.19 ± 1.13
Scirpus robustus Pursh (Glumiflorae: Cyperaceae)	1.52 ± 0.14	45.71 ± 1.05	30.80 ± 1.99
Herbivores: (n = 8)
Prokelisia marginata (Van Duzee) (Hemiptera: Delphacidae), SA	8.98 ± 0.19	52.69 ± 0.90	5.88 ± 0.14
Prokelisia dolus Wilson (Hemiptera: Delphacidae), SA	9.45 ± 0.13	50.15 ± 1.51	5.31 ± 0.20
Delphacodes penedetecta Beamer (Hemiptera: Delphacidae), SA	8.37 ± 0.24	51.63 ± 1.44	6.19 ± 0.19
Delphacodes detecta (Van Duzee) (Hemiptera: Delphacidae), SP	8.80 ± 0.50	53.84 ± 1.17	6.42 ± 0.50
Megamelus lobatus Beamer (Hemiptera: Delphacidae), SA	9.19 ± 0.57	53.02 ± 1.70	5.87 ± 0.54
Tumidagena minuta McDermott (Hemiptera: Delphacidae), SP	9.10 ± 0.26	50.86 ± 2.13	5.60 ± 0.24
Trigonotylus uhleri (Reuter) (Hemiptera: Miridae), SA	10.40 ± 0.40	46.45 ± 0.70	4.49 ± 0.16
Chaetopsis aenea (Wiedeman) (Diptera: Otitidae), SA	9.54 ± 0.64	51.40 ± 0.46	5.47 ± 0.43
Omnivores: (n = 2)
Conocephalus spartinae (Fox) (Orthoptera: Tettigoniidae), SA	11.04 ± 0.51	50.62 ± 0.65	4.61 ± 0.27
Naemia seriata (Melsheimer) (Coleoptera: Coccinellidae), SA	10.24 ± 0.10	51.48 ± 0.29	5.03 ± 0.08
Predators: (n = 21)
Eurythrodiplax berenice (Say) (Odonata: Libellulidae), SA	12.31 ± 0.27	47.53 ± 1.03	3.87 ± 0.10
Tytthus vagus (Knight) (Hemiptera: Miridae), SA	9.31 ± 0.16	48.78 ± 0.85	5.25 ± 0.07
Nabis capsiformis Germar (Hemiptera: Nabidae), SA	11.47 ± 0.26	48.91 ± 0.50	4.27 ± 0.13
Pentacora hirta (Say) (Hemiptera: Saldidae), SA	11.08 ± 0.10	49.25 ± 0.32	4.44 ± 0.03
Pentacora spacelata (Uhler) (Hemiptera: Saldidae), SA	10.37 ± 0.16	50.13 ± 0.51	4.84 ± 0.13
Saldula interstitialis (Say) (Hemiptera: Saldidae), SA	10.13 ± 0.13	49.92 ± 0.44	4.93 ± 0.11
Isohydnocera tabida (Le Conte) (Coleoptera: Cleridae), SA	10.81 ± 0.02	49.78 ± 0.38	4.61 ± 0.04
Photinus pyralis (Linnaeus) (Coleoptera: Lampyridae), SA	13.56 ± 0.31	46.95 ± 0.03	3.46 ± 0.08
Haplogonatopus americanus Perkins (Hymenoptera: Dryinidae), SA	11.66 ± 0.20	49.47 ± 0.22	4.24 ± 0.07
Pardosa littoralis Banks (Araneae: Lycosidae), SA	11.93 ± 0.27	47.86 ± 0.30	4.02 ± 0.11
Hogna modesta (Keyserling) (Araneae: Lycosidae), SA	12.29 ± 0.46	47.82 ± 1.18	3.92 ± 0.25
Pirata marxii Stone (Araneae: Lycosidae), SA	11.92 ± 0.37	47.57 ± 0.72	4.00 ± 0.18
Clubiona saltitans Emerton (Araneae: Clubionidae), SA	10.84 ± 0.48	51.88 ± 2.16	4.82 ± 0.40
Tibellus oblongus (Walckenaer) (Araneae: Philodromidae), SA	11.86 ± 0.24	48.82 ± 0.08	4.12 ± 0.08
Marpissa pikei (Peckham) (Araneae: Salticidae), SA	12.41 ± 0.16	46.98 ± 0.50	3.79 ± 0.01
Metacyrba undata (DeGeer) (Araneae: Salticidae), SA	13.43 ± 0.15	46.66 ± 0.49	3.48 ± 0.28
Grammonota trivittata Banks (Araneae: Linyphiidae), SA	12.01 ± 0.06	47.58 ± 0.53	3.96 ± 0.04
Hyposinga variabilis (Emerton) (Araneae: Araneidae), SA	9.89 ± 0.23	52.01 ± 0.45	5.26 ± 0.16
Neoscona pratensis (Hentz) (Araneae: Araneidae), SA	11.95 ± 0.41	47.29 ± 0.46	3.96 ± 0.14
Tetragnatha caudata Emerton (Araneae: Tetragnathidae), SA	11.05 ± 0.42	48.80 ± 0.85	4.43 ± 0.09
Paisochelifer callus (Pseudoscorpiones: Cheliferidae), SA	10.70 ± 0.24	51.55 ± 0.43	4.82 ± 0.14

   Notes: All taxa were collected at Tuckerton, Ocean County, or Alloway Creek, Salem County, New Jersey during July 2002. Arthropods were sampled in either Spartina alterniflora (SA) or Spartina patens (SP).