Blooms of the harmful algae Margalefidinium polykrikoides and Alexandrium monilatum alter the York River Estuary microbiome.

Autor: Fortin SG; Virginia Institute of Marine Science, William and Mary, Gloucester Point, VA, USA. Electronic address: sgfortin@vims.edu., Song B; Virginia Institute of Marine Science, William and Mary, Gloucester Point, VA, USA. Electronic address: songb@vims.edu., Anderson IC; Virginia Institute of Marine Science, William and Mary, Gloucester Point, VA, USA., Reece KS; Virginia Institute of Marine Science, William and Mary, Gloucester Point, VA, USA.
Jazyk: angličtina
Zdroj: Harmful algae [Harmful Algae] 2022 May; Vol. 114, pp. 102216. Date of Electronic Publication: 2022 Mar 09.
DOI: 10.1016/j.hal.2022.102216
Abstrakt: Harmful algal blooms (HABs) cause damage to fisheries, aquaculture, and human health around the globe. However, the impact of HABs on water column microbiomes and biogeochemistry is poorly understood. This study examined the impacts of consecutive blooms of the ichthyotoxic dinoflagellates Margalefidinium polykrikoides and Alexandrium monilatum on the water microbiome in the York River Estuary, Chesapeake Bay, USA. The samples dominated by single dinoflagellate species and by a mix of the two dinoflagellates had different microbiome compositions than the ones with low levels of both species. The M. polykrikoides bloom was co-dominated by Winogradskyella and had increased concentrations of dissolved organic carbon. The A. monilatum bloom had little impact on the prokaryotic portion of the whole community but was associated with a specific group of prokaryotes in the particle-attached (>3 µm) fraction including Candidatus Nitrosopumilus, Candidatus Actinomarina, SAR11 Clade Ia, Candidatus Bealeia, and Rhodobacteraceae HIMB11. Thus, blooms of these two algal species impacted the estuarine microbiome in different ways, likely leading to shifts in estuarine carbon and nutrient cycling, with M. polykrikoides potentially having a greater impact on carbon cycling in the estuarine ecosystem than A. monilatum.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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