Skip to main content
Log in

Revealing hydrogen peroxide as an external stressor in macrophyte-dominated coastal ecosystems

  • Plant-microbe-animal interactions – original research
  • Published:
Oecologia Aims and scope Submit manuscript

Abstract

Benthic primary producers in coastal ecosystems provide important habitat for marine organisms through the provision of complex 3D habitat. Primary producers produce organic matter, while simultaneously producing reactive oxygen species, including hydrogen peroxide (H2O2), a driver of oxidative stress. Through their high biomass, productivity and effect on local hydrodynamics, benthic primary producers can potentially increase H2O2 concentrations surrounding the biogenic structures they form. The aim of this study was to identify the potential role of H2O2 produced by benthic primary producers as an external stressor in coastal ecosystems. This was achieved by measuring H2O2 concentrations within sea lettuce blooms (Ulva sp.), giant kelp forests (Macrocystis pyrifera), and seagrass meadows (Zostera muelleri); quantifying H2O2 production rates of these species; and testing heterotrophic bacterial response to relevant H2O2 concentrations. Ulva sp. produced five times more H2O2 than other species. At in situ concentrations, H2O2 inhibited bacterial production and carbon flow through the microbial loop by 75%. This study reveals H2O2 as an additional stressor in bloom-forming Ulva sp. with higher H2O2 production compared to the ecosystem engineers M. pyrifera and Z. muelleri. H2O2 production by benthic primary producers can affect carbon flow through the microbial loop, with the potential to propagate a stress signal up the food web.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

Download references

Acknowledgements

Acknowledgements must be made to the skippers and technical staff at Portobello Marine Laboratory for their assistance with field and laboratory research, including Dr. Doug Mackie, Linda Groenewegen, and Sean Heseltine.

Author information

Authors and Affiliations

Authors

Contributions

IT, CH, & FB designed experiments. IT & JH conducted field work and experiments. IT analysed data. IT wrote the manuscript and CH, FB, and JH provided editorial advice.

Corresponding author

Correspondence to Isla M. Twigg.

Additional information

Communicated by James Fourqurean.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Supplementary file1 (DOCX 21 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Twigg, I.M., Baltar, F., Hall, J.R. et al. Revealing hydrogen peroxide as an external stressor in macrophyte-dominated coastal ecosystems. Oecologia 193, 583–591 (2020). https://doi.org/10.1007/s00442-020-04690-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00442-020-04690-0

Keywords

Navigation