Limnology

, Volume 11, Issue 2, pp 185–192

Differences in nitrogen and carbon stable isotopes between planktonic and benthic microalgae

Authors

    • Graduate School of Life SciencesTohoku University
    • Institute for Chemistry and Biology of the Marine EnvironmentCarl-von-Ossietzky University Oldenburg
  • Eisuke Kikuchi
    • Center for Northeast Asian StudiesTohoku University
  • Shuichi Shikano
    • Center for Northeast Asian StudiesTohoku University
  • Shigeto Takagi
    • Center for Northeast Asian StudiesTohoku University
Note

DOI: 10.1007/s10201-009-0297-1

Cite this article as:
Doi, H., Kikuchi, E., Shikano, S. et al. Limnology (2010) 11: 185. doi:10.1007/s10201-009-0297-1

Abstract

We compiled published data on the nitrogen and carbon stable isotope ratios of phytoplankton and benthic microalgae from lentic systems and explored the primary factors determining the isotope values among systems. Also, we investigated seasonal changes in nitrogen stable isotope ratios of phytoplankton and benthic microalgae in the strongly acidic lake, Lake Katanuma, which has only two dominant species, Pinnularia acidojaponica as a benthic diatom and Chlamydomonas acidophila, a planktonic green alga. From the published dataset, it may be concluded that δ13C of benthic diatoms were more enriched than those of phytoplankton at the same sites, although the nitrogen isotope of phytoplankton and benthic microalgae were similar. This differences in δ13C between benthic microalgae and phytoplankton could be explained by the boundary layer effect. On the other hand, nitrogen isotope values of both benthic microalgae and phytoplankton were primarily controlled by the same environmental factor, and boundary layer effects are not the primary factor determining the nitrogen isotope values of microalgae. Also, we showed temporal dynamics in nitrogen isotopes of benthic and planktonic microalgae species in Lake Katanuma, and the trends of nitrogen isotopes are similar between benthic and planktonic microalgae, as concluded from the published dataset.

Keywords

Isotope fractionation Meta-analysis Lake Marine Diatom

Copyright information

© The Japanese Society of Limnology 2009