Biogeography of American Northwest Hot Spring A/B' -Lineage Synechococcus Populations

Frontiers in Microbiology
Eric D BecraftDavid M Ward

Abstract

Previous analyses have shown how diversity among unicellular cyanobacteria inhabiting island-like hot springs is structured relative to physical separation and physiochemical differences among springs, especially at local to regional scales. However, these studies have been limited by the low resolution provided by the molecular markers surveyed. We analyzed large datasets obtained by high-throughput sequencing of a segment of the photosynthesis gene psaA from samples collected in hot springs from geothermal basins in Yellowstone National Park, Montana, and Oregon, all known from previous studies to contain populations of A/B'-lineage Synechococcus. The fraction of identical sequences was greater among springs separated by <50 km than among springs separated by >50 km, and springs separated by >800 km shared sequence variants only rarely. Phylogenetic analyses provided evidence for endemic lineages that could be related to geographic isolation and/or geochemical differences on regional scales. Ecotype Simulation 2 was used to predict putative ecotypes (ecologically distinct populations), and their membership, and canonical correspondence analysis was used to examine the geographical and geochemical bases for variation in their ...Continue Reading

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Citations

Jul 24, 2020·Environmental Microbiology·Vinícius W SalazarFabiano L Thompson
Sep 27, 2020·Applied and Environmental Microbiology·Eric D BecraftDavid M Ward

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Datasets Mentioned

BETA
CP000239

Software Mentioned

FastTree
CCA
BLASTn
ES2
Ecotype Simulation 2
R library vegan
R script
R package vegan
Ecotype
Ecotype Simulation

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