Ocean currents promote rare species diversity in protists.
Sci Adv
; 6(29): eaaz9037, 2020 07.
Article
en En
| MEDLINE
| ID: mdl-32832617
ABSTRACT
Oceans host communities of plankton composed of relatively few abundant species and many rare species. The number of rare protist species in these communities, as estimated in metagenomic studies, decays as a steep power law of their abundance. The ecological factors at the origin of this pattern remain elusive. We propose that chaotic advection by oceanic currents affects biodiversity patterns of rare species. To test this hypothesis, we introduce a spatially explicit coalescence model that reconstructs the species diversity of a sample of water. Our model predicts, in the presence of chaotic advection, a steeper power law decay of the species abundance distribution and a steeper increase of the number of observed species with sample size. A comparison of metagenomic studies of planktonic protist communities in oceans and in lakes quantitatively confirms our prediction. Our results support that oceanic currents positively affect the diversity of rare aquatic microbes.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Plancton
/
Biodiversidad
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Sci Adv
Año:
2020
Tipo del documento:
Article
País de afiliación:
Japón