The relative importance of photodegradation and biodegradation of terrestrially derived dissolved organic carbon across four lakes of differing trophic status

Dempsey, Christopher M.; Brentrup, Jennifer A.; Magyan, Sarah; Knoll, Lesley B.; Swain, Hilary M.; Gaiser, Evelyn E.; Morris, Donald P.; Ganger, Michael T.; Williamson, Craig E.

doi:https://doi.org/10.5194/bg-17-6327-2020

Articles | Volume 17, issue 24

https://doi.org/10.5194/bg-17-6327-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-6327-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 24

Research article

|

15 Dec 2020

Research article |

| 15 Dec 2020

The relative importance of photodegradation and biodegradation of terrestrially derived dissolved organic carbon across four lakes of differing trophic status

Christopher M. Dempsey, Jennifer A. Brentrup, Sarah Magyan, Lesley B. Knoll, Hilary M. Swain, Evelyn E. Gaiser, Donald P. Morris, Michael T. Ganger, and Craig E. Williamson

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Final revised paper (published on 15 Dec 2020)
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Preprint (discussion started on 02 Jun 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review BG-2020-160', Anonymous Referee #1, 18 Jun 2020
- AC1: 'Reply to Reviewer 1', Christopher Dempsey, 02 Jul 2020
RC2: 'Review bg-2020-160', Anonymous Referee #2, 22 Jun 2020
- AC2: 'Reply to Reviewer 2', Christopher Dempsey, 07 Jul 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (17 Jul 2020) by Anja Engel

AR by Christopher Dempsey on behalf of the Authors (20 Aug 2020)

ED: Referee Nomination & Report Request started (30 Aug 2020) by Anja Engel

RR by Anonymous Referee #2 (21 Sep 2020)

ED: Publish subject to minor revisions (review by editor) (23 Sep 2020) by Anja Engel

AR by Christopher Dempsey on behalf of the Authors (04 Oct 2020)

ED: Publish as is (22 Oct 2020) by Anja Engel

AR by Christopher Dempsey on behalf of the Authors (30 Oct 2020) Author's response Manuscript

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Short summary

We looked at how terrestrial dissolved organic carbon (DOC) from the watersheds of four different lakes responded to both biodegradation (i.e., microbes) and photodegradation (i.e., sunlight). The traditional paradigm is that biodegradation is more important than photodegradation. Our research shows that, on short timescales (i.e., 7 d), sunlight is more important than microbes in degrading DOC. Interestingly, the lakes had different responses to sunlight based on their trophic status.