Sedimentary ancient DNA metabarcoding delineates the contrastingly temporal change of lake cyanobacterial communities

Water Research
Xiaofeng CaoJiuhui Qu

Abstract

Harmful cyanobacterial blooms consisting of toxic taxa can produce a wide variety of toxins to threaten water quality, ecosystem functions and services. Of greater concern was the changing patterns of cyanobacterial assemblage were not well understood due to the lack of long-term monitoring data over the temporal scale. Biodiversity change in cyanobacterial community and paleoenvironmental variables over the past 170 years in Lake Chenghai were investigated based on sedimentary ancient DNA metabarcoding and traditional paleolimnological analysis. The results showed species richness and homogenization of cyanobacterial assemblage increased in the most recent decades, which were synchronized with the growth of artificial fertilization and decline in precipitation. Cyanobacterial co-occurrence network analysis revealed more complex interactions and weak community stability after the change point of ∼1987, while the rare cyanobacterial genera such as Anabaena, Planktothrix, Oscillatoria and Microcystis were identified to be keystone taxa affecting cyanobacterial assemblage. Furthermore, an increase of toxin-producing cyanobacterial taxa was significantly and positively associated with TN and TP, as well as TN/IP and TN/TP, which wa...Continue Reading

Citations

Dec 15, 2020·Journal of Microbiological Methods·Caitlin S RomanisBrett A Neilan

❮ Previous
Next ❯

Related Concepts

Related Feeds

Ancient DNA

Ancient DNA sequences are able to offer valuable insights into molecular evolutionary processes, but are notoriously difficult to analyze due to molecular damage and exogenous dna contamination. Discover the latest research on Ancient DNA here.

© 2021 Meta ULC. All rights reserved