Patterns in Abundance, Cell Size and Pigment Content of Aerobic Anoxygenic Phototrophic Bacteria along Environmental Gradients in Northern Lakes
| Author(s) | Fauteux, Lisa | |
| Author(s) | Cottrell, Matthew T. | |
| Author(s) | Kirchman, David L. | |
| Author(s) | Borrego, Carles M. | |
| Author(s) | Garcia-Chaves, Maria Carolina | |
| Author(s) | del Giorgio, Paul A. | |
| Ordered Author | Lisa Fauteux, Matthew T. Cottrell, David L. Kirchman, Carles M. Borrego, Maria Carolina Garcia-Chaves, Paul A. del Giorgio | |
| UD Author | Cottrell, Matthew T. | en_US |
| UD Author | Kirchman, David L. | en_US |
| Date Accessioned | 2016-04-11T15:55:47Z | |
| Date Available | 2016-04-11T15:55:47Z | |
| Copyright Date | Copyright © 2015 Fauteux et al. | en_US |
| Publication Date | 2015-04-30 | |
| Description | Publisher's PDF. | en_US |
| Abstract | There is now evidence that aerobic anoxygenic phototrophic (AAP) bacteria are widespread across aquatic systems, yet the factors that determine their abundance and activity are still not well understood, particularly in freshwaters. Here we describe the patterns in AAP abundance, cell size and pigment content across wide environmental gradients in 43 temperate and boreal lakes of Québec. AAP bacterial abundance varied from 1.51 to 5.49 x 105 cellsmL-1, representing <1 to 37%of total bacterial abundance. AAP bacteria were present year-round, including the ice-cover period, but their abundance relative to total bacterial abundance was significantly lower in winter than in summer (2.6%and 7.7%, respectively). AAP bacterial cells were on average two-fold larger than the average bacterial cell size, thus AAP cells made a greater relative contribution to biomass than to abundance. Bacteriochlorophyll a (BChla) concentration varied widely across lakes, and was not related to AAP bacterial abundance, suggesting a large intrinsic variability in the cellular pigment content. Absolute and relative AAP bacterial abundance increased with dissolved organic carbon (DOC), whereas cell-specific BChla content was negatively related to chlorophyll a (Chla). As a result, both the contribution of AAP bacteria to total prokaryotic abundance, and the cell-specific BChla pigment content were positively correlated with the DOC:Chla ratio, both peaking in highly colored, low-chlorophyll lakes.Our results suggest that photoheterotrophymight represent a significant ecological advantage in highly colored, low-chlorophyll lakes, where DOC pool is chemically and structurally more complex. | en_US |
| Department | University of Delaware. School of Marine Science and Policy. | en_US |
| Citation | Fauteux L, Cottrell MT, Kirchman DL, Borrego CM, Garcia-Chaves MC, del Giorgio PA (2015) Patterns in Abundance, Cell Size and Pigment Content of Aerobic Anoxygenic Phototrophic Bacteria along Environmental Gradients in Northern Lakes. PLoS ONE 10(4): e0124035. doi:10.1371/journal. pone.0124035 | en_US |
| DOI | 10.1371/journal. pone.0124035 | en_US |
| ISSN | 1932-6203 | en_US |
| URL | http://udspace.udel.edu/handle/19716/17608 | |
| Language | en_US | en_US |
| Publisher | PLOS (Public Library of Science) | en_US |
| dc.rights | CC BY 4.0 | en_US |
| dc.source | PLOS One | en_US |
| dc.source.uri | http://journals.plos.org/plosone/ | en_US |
| Title | Patterns in Abundance, Cell Size and Pigment Content of Aerobic Anoxygenic Phototrophic Bacteria along Environmental Gradients in Northern Lakes | en_US |
| Type | Article | en_US |
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