Cyanobacterial DNA from Lake Sediments

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Tracking Environmental Change Using Lake Sediments

Part of the book series: Developments in Paleoenvironmental Research ((DPER,volume 21))

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Abstract

Cyanobacteria have become infamous due to their impacts on aquatic ecosystems, in particular negative consequences on ecosystem functioning and services to human populations. Observations of cyanobacterial dominance have been reported since the end of the 1800s and the global rise in industrialisation characterized by enhanced human perturbations and a warming climate. We have limited information on past cyanobacteria dynamics and geographic distribution due to the paucity of long-term monitoring data. In addition, challenges remain surrounding the detection and the identification of cyanobacterial taxa deposited in sedimentary archives.

In this chapter, we synthesized the scientific knowledge gained via studies using environmental DNA archived in lake sediments (i.e., sedimentary DNA; sedDNA; Crump 2021 ) to reconstruct the temporal changes in the ecology, habitat, and function of cyanobacteria in relation to environmental change. We begin with an overview of the general ecology and distribution of cyanobacteria, followed by a characterization of the nature of the sedDNA signal and relevant taphonomic processes, with respect to cyanobacteria. We then report the current state of knowledge of cyanobacterial past dynamics in lacustrine environments through a review of the published cyanobacteria sedDNA literature. Last, we discuss how the field of sedDNA has the potential to shed light on the timing and specific causes of environmental change in addition to guiding ecosystem restoration and management goals.

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Acknowledgements

We thank E. Nwosu for providing the cyanobacterial OTU table for Lake Tiefer See. We also wish to thank members of the SedaDNA Scientific Society who contributed ancient DNA data from lake sampling sites to the database. We thank Paul MacKeigan for feedback on a previous version of the manuscript. Finally, we extend a special thanks to Drs. Susie Wood, Nico Salmaso, Eric Capo, John Smol and Cécilia Barouillet for their constructive reviews of this chapter. MEM was supported by a postdoctoral fellowship from the Natural Sciences and Engineering Research Council of Canada (NSERC) and FRP through an NSERC Discovery Grant.

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Monchamp, ME., Pick, F.R. (2023). Cyanobacterial DNA from Lake Sediments. In: Capo, E., Barouillet, C., Smol, J.P. (eds) Tracking Environmental Change Using Lake Sediments. Developments in Paleoenvironmental Research, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-031-43799-1_5

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