A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>

ABSTRACT We show that Streptomyces biogeography in soils across North America is influenced by the regional diversification of microorganisms due to dispersal limitation and genetic drift. Streptomyces spp. form desiccation-resistant spores, which can be dispersed on the wind, allowing for a strong...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Cheryl P. Andam, James R. Doroghazi, Ashley N. Campbell, Peter J. Kelly, Mallory J. Choudoir, Daniel H. Buckley
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2016
Materias:	Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/37284f349c344befb71633243212ebb4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:37284f349c344befb71633243212ebb4
record_format	dspace
spelling	oai:doaj.org-article:37284f349c344befb71633243212ebb42021-11-15T15:41:41ZA Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>10.1128/mBio.02200-152150-7511https://doaj.org/article/37284f349c344befb71633243212ebb42016-05-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.02200-15https://doaj.org/toc/2150-7511ABSTRACT We show that Streptomyces biogeography in soils across North America is influenced by the regional diversification of microorganisms due to dispersal limitation and genetic drift. Streptomyces spp. form desiccation-resistant spores, which can be dispersed on the wind, allowing for a strong test of whether dispersal limitation governs patterns of terrestrial microbial diversity. We employed an approach that has high sensitivity for determining the effects of genetic drift. Specifically, we examined the genetic diversity and phylogeography of physiologically similar Streptomyces strains isolated from geographically distributed yet ecologically similar habitats. We found that Streptomyces beta diversity scales with geographic distance and both beta diversity and phylogenetic diversity manifest in a latitudinal diversity gradient. This pattern of Streptomyces biogeography resembles patterns seen for diverse species of plants and animals, and we therefore evaluated these data in the context of ecological and evolutionary hypotheses proposed to explain latitudinal diversity gradients. The data are consistent with the hypothesis that niche conservatism limits dispersal, and historical patterns of glaciation have limited the time for speciation in higher-latitude sites. Most notably, higher-latitude sites have lower phylogenetic diversity, higher phylogenetic clustering, and evidence of range expansion from lower latitudes. In addition, patterns of beta diversity partition with respect to the glacial history of sites. Hence, the data support the hypothesis that extant patterns of Streptomyces biogeography have been driven by historical patterns of glaciation and are the result of demographic range expansion, dispersal limitation, and regional diversification due to drift. IMPORTANCE Biogeographic patterns provide insight into the evolutionary and ecological processes that govern biodiversity. However, the evolutionary and ecological processes that govern terrestrial microbial diversity remain poorly characterized. We evaluated the biogeography of the genus Streptomyces to show that the diversity of terrestrial bacteria is governed by many of the same processes that govern the diversity of many plant and animal species. While bacteria of the genus Streptomyces are a preeminent source of antibiotics, their evolutionary history, biogeography, and biodiversity remain poorly characterized. The observations we describe provide insight into the drivers of Streptomyces biodiversity and the processes that underlie microbial diversification in terrestrial habitats.Cheryl P. AndamJames R. DoroghaziAshley N. CampbellPeter J. KellyMallory J. ChoudoirDaniel H. BuckleyAmerican Society for MicrobiologyarticleMicrobiologyQR1-502ENmBio, Vol 7, Iss 2 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microbiology QR1-502
spellingShingle	Microbiology QR1-502 Cheryl P. Andam James R. Doroghazi Ashley N. Campbell Peter J. Kelly Mallory J. Choudoir Daniel H. Buckley A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
description	ABSTRACT We show that Streptomyces biogeography in soils across North America is influenced by the regional diversification of microorganisms due to dispersal limitation and genetic drift. Streptomyces spp. form desiccation-resistant spores, which can be dispersed on the wind, allowing for a strong test of whether dispersal limitation governs patterns of terrestrial microbial diversity. We employed an approach that has high sensitivity for determining the effects of genetic drift. Specifically, we examined the genetic diversity and phylogeography of physiologically similar Streptomyces strains isolated from geographically distributed yet ecologically similar habitats. We found that Streptomyces beta diversity scales with geographic distance and both beta diversity and phylogenetic diversity manifest in a latitudinal diversity gradient. This pattern of Streptomyces biogeography resembles patterns seen for diverse species of plants and animals, and we therefore evaluated these data in the context of ecological and evolutionary hypotheses proposed to explain latitudinal diversity gradients. The data are consistent with the hypothesis that niche conservatism limits dispersal, and historical patterns of glaciation have limited the time for speciation in higher-latitude sites. Most notably, higher-latitude sites have lower phylogenetic diversity, higher phylogenetic clustering, and evidence of range expansion from lower latitudes. In addition, patterns of beta diversity partition with respect to the glacial history of sites. Hence, the data support the hypothesis that extant patterns of Streptomyces biogeography have been driven by historical patterns of glaciation and are the result of demographic range expansion, dispersal limitation, and regional diversification due to drift. IMPORTANCE Biogeographic patterns provide insight into the evolutionary and ecological processes that govern biodiversity. However, the evolutionary and ecological processes that govern terrestrial microbial diversity remain poorly characterized. We evaluated the biogeography of the genus Streptomyces to show that the diversity of terrestrial bacteria is governed by many of the same processes that govern the diversity of many plant and animal species. While bacteria of the genus Streptomyces are a preeminent source of antibiotics, their evolutionary history, biogeography, and biodiversity remain poorly characterized. The observations we describe provide insight into the drivers of Streptomyces biodiversity and the processes that underlie microbial diversification in terrestrial habitats.
format	article
author	Cheryl P. Andam James R. Doroghazi Ashley N. Campbell Peter J. Kelly Mallory J. Choudoir Daniel H. Buckley
author_facet	Cheryl P. Andam James R. Doroghazi Ashley N. Campbell Peter J. Kelly Mallory J. Choudoir Daniel H. Buckley
author_sort	Cheryl P. Andam
title	A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
title_short	A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
title_full	A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
title_fullStr	A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
title_full_unstemmed	A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>
title_sort	latitudinal diversity gradient in terrestrial bacteria of the genus <italic toggle="yes">streptomyces</italic>
publisher	American Society for Microbiology
publishDate	2016
url	https://doaj.org/article/37284f349c344befb71633243212ebb4
work_keys_str_mv	AT cherylpandam alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT jamesrdoroghazi alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT ashleyncampbell alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT peterjkelly alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT malloryjchoudoir alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT danielhbuckley alatitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT cherylpandam latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT jamesrdoroghazi latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT ashleyncampbell latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT peterjkelly latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT malloryjchoudoir latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic AT danielhbuckley latitudinaldiversitygradientinterrestrialbacteriaofthegenusitalictoggleyesstreptomycesitalic
_version_	1718427637205958656

A Latitudinal Diversity Gradient in Terrestrial Bacteria of the Genus <italic toggle="yes">Streptomyces</italic>

Ejemplares similares