Articles | Volume 20, issue 9
https://doi.org/10.5194/bg-20-1713-2023
https://doi.org/10.5194/bg-20-1713-2023
Research article
 | 
04 May 2023
Research article |  | 04 May 2023

High metabolism and periodic hypoxia associated with drifting macrophyte detritus in the shallow subtidal Baltic Sea

Karl M. Attard, Anna Lyssenko, and Iván F. Rodil

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Cited articles

Attard, K. M. and Glud, R. N.: Technical note: Estimating light-use efficiency of benthic habitats using underwater O2 eddy covariance, Biogeosciences, 17, 4343–4353, https://doi.org/10.5194/bg-17-4343-2020, 2020. 
Attard, K. M., Rodil, I. F., Berg, P., Norkko, J., Norkko, A., and Glud, R. N.: Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy-forming macroalga Fucus vesiculosus, Limnol. Oceanogr., 64, 149–164, https://doi.org/10.1002/lno.11026, 2019a. 
Attard, K. M., Rodil, I. F., Glud, R. N., Berg, P., Norkko, J., and Norkko, A.: Seasonal ecosystem metabolism across shallow benthic habitats measured by aquatic eddy covariance, Limnology and Oceanography Letters, 4, 79–86, https://doi.org/10.1002/lol2.10107, 2019b. 
Attard, K. M., Lyssenko, A., and Rodil, I. F.: High metabolism and periodic hypoxia associated with drifting macrophyte detritus in the shallow subtidal Baltic Sea, Dryad Digital Repository, [data set], https://doi.org/10.5061/dryad.7pvmcvdzj, 2023. 
Berg, P. and Pace, M. L.: Continuous measurement of air–water gas exchange by underwater eddy covariance, Biogeosciences, 14, 5595–5606, https://doi.org/10.5194/bg-14-5595-2017, 2017. 
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Short summary
Aquatic plants produce a large amount of organic matter through photosynthesis that, following erosion, is deposited on the seafloor. In this study, we show that plant detritus can trigger low-oxygen conditions (hypoxia) in shallow coastal waters, making conditions challenging for most marine animals. We propose that the occurrence of hypoxia may be underestimated because measurements typically do not consider the region closest to the seafloor, where detritus accumulates.
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