Articles | Volume 14, issue 19
Biogeosciences, 14, 4455–4466, 2017
https://doi.org/10.5194/bg-14-4455-2017
Biogeosciences, 14, 4455–4466, 2017
https://doi.org/10.5194/bg-14-4455-2017

Research article 11 Oct 2017

Research article | 11 Oct 2017

Effects of ultraviolet radiation on photosynthetic performance and N2 fixation in Trichodesmium erythraeum IMS 101

Xiaoni Cai et al.

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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (Editor review) (09 Aug 2017) by Gerhard Herndl
AR by Xiaoni Cai on behalf of the Authors (21 Aug 2017)  Author's response    Manuscript
ED: Publish as is (29 Aug 2017) by Gerhard Herndl
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Short summary
Trichodesmium is significant marine N2 fixer. We conducted short- and long-term UV exposure experiment to investigate how UV affects this organism. Our results showed N2 fixation and carbon fixation rates were significantly reduced under UV radiation. As a defense strategy, Trichodesmium is able to synthesize UV-absorbing compounds to protect from UV damage. Our results suggest that shipboard experiments in UV-opaque containers may have substantially overestimated in situ N2 fixation rate.
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