Interspecific variation in the elemental and stable isotope content of seagrasses in South Florida
نویسندگان
چکیده
14 The elemental (C, N and P) and isotopic (δ 13 C, δ 15 N) content of leaves of the seagrasses 15 Thalassia testudinum, Halodule wrightii, and Syringodium filiforme were measured across a 16 10,000 km 2 survey of the seagrass communities of South Florida in 1999 and 2000. Trends at 17 local and broad spatial scales were compared to examine interspecific variation in the seagrass 18 characteristics often used as ecological indicators. The elemental and stable isotope contents of 19 all species were variable and demonstrated marked interspecific variation. At broad spatial scales 20 mean nitrogen: phosphorus (N:P) ratios were lowest for T.testudinum (36:5 ± 1.1) and S. 21 filiforme (38:9 ± 1.3), and highest for H. wrightii (44:1 ± 1.8). Stable carbon isotope ratios (δ 13 C) 22 were highest for S. filiforme (-6.2‰ ± 0.2‰), intermediate for T. testudinum (-8.6‰ ± 0.2‰), 23
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