Articles | Volume 12, issue 22
https://doi.org/10.5194/bg-12-6781-2015
https://doi.org/10.5194/bg-12-6781-2015
Research article
 | 
26 Nov 2015
Research article |  | 26 Nov 2015

Chlorophyll a-specific Δ14C, δ13C and δ15N values in stream periphyton: implications for aquatic food web studies

N. F. Ishikawa, M. Yamane, H. Suga, N. O. Ogawa, Y. Yokoyama, and N. Ohkouchi

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Cited articles

Allan, J. D. and Castillo, M. M.: Stream Ecology: Structure and Function of Running Waters, 2nd ed., Springer, Dordrecht, Germany, 436 pp., 2007.
Amir-Shapira, D., Goldschmidt, E. E., and Altman, A.: Chlorophyll catabolism in senescing plant tissues: In vivo breakdown intermediates suggest different degradative pathways for citrus fruit and parsley leaves, P. Natl. Acad. Sci. USA, 84, 1901–1905, 1987.
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Bloemen, J., McGuire, M. A., Aubrey, D. P., Teskey, R. O., and Steppe, K.: Transport of root-respired CO2 via the transpiration stream affects aboveground carbon assimilation and CO2 efflux in trees, New Phytol., 197, 555–565, 2013.
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We determined the isotopic composition of chlorophyll a in periphytic algae attached to a streambed substrate (periphyton). Although the bulk isotopic composition of periphyton is recognised as a surrogate for the photosynthetic algal community, our results indicate that the bulk periphyton matrix at the study site consists of 89 to 95% algal carbon and 5 to 11% terrestrial organic carbon. We show that the chlorophyll a isotopic composition is a useful tracer for the aquatic food web studies.
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