Document of bibliographic reference 300225

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Insights into global planktonic diatom diversity: the importance of comparisons between phylogenetically equivalent units that account for time

Abstract

Metabarcoding has offered unprecedented insights into microbial diversity. In many studies, short DNA sequences are binned into consecutively lower Linnaean ranks, and ranked groups (e.g., genera) are the units of biodiversity analyses. These analyses assume that Linnaean ranks are biologically meaningful and that identically ranked groups are comparable. We used a metabarcode dataset for marine planktonic diatoms to illustrate the limits of this approach. We found that the 20 most abundant marine planktonic diatom genera ranged in age from 4 to 134 million years, indicating the non-equivalence of genera because some have had more time to diversify than others. However, species richness was largely independent of genus age, suggesting that disparities in species richness among genera were better explained by variation in rates of speciation and extinction. Taxonomic classifications often do not reflect phylogeny, so genus-level analyses can include phylogenetically nested genera, further confounding rank-based analyses. These results underscore the indispensable role of phylogeny in understanding patterns of microbial diversity.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000447661300020

Bibliographic citation

Nakov, T.; Beaulieu, J.M.; Alverson, A.J. (2018). Insights into global planktonic diatom diversity: the importance of comparisons between phylogenetically equivalent units that account for time. ISME J. 12: 2807-2810. https://dx.doi.org/10.1038/s41396-018-0221-y

Topic

Marine

Is peer reviewed

true