Temperature controls on aquatic bacterial production and community dynamics in arctic lakes and streams
- PMID: 20192972
- DOI: 10.1111/j.1462-2920.2010.02176.x
Temperature controls on aquatic bacterial production and community dynamics in arctic lakes and streams
Abstract
The impact of temperature on bacterial activity and community composition was investigated in arctic lakes and streams in northern Alaska. Aquatic bacterial communities incubated at different temperatures had different rates of production, as measured by (14)C-leucine uptake, indicating that populations within the communities had different temperature optima. Samples from Toolik Lake inlet and outlet were collected at water temperatures of 14.2 degrees C and 15.9 degrees C, respectively, and subsamples incubated at temperatures ranging from 6 degrees C to 20 degrees C. After 5 days, productivity rates varied from 0.5 to approximately 13.7 microg C l(-1) day(-1) and two distinct activity optima appeared at 12 degrees C and 20 degrees C. At these optima, activity was 2- to 11-fold higher than at other incubation temperatures. The presence of two temperature optima indicates psychrophilic and psychrotolerant bacteria dominate under different conditions. Community fingerprinting via denaturant gradient gel electrophoresis (DGGE) of 16S rRNA genes showed strong shifts in the composition of communities driven more by temperature than by differences in dissolved organic matter source; e.g. four and seven unique operational taxonomic units (OTUs) were found only at 2 degrees C and 25 degrees C, respectively, and not found at other incubation temperatures after 5 days. The impact of temperature on bacteria is complex, influencing both bacterial productivity and community composition. Path analysis of measurements of 24 streams and lakes sampled across a catchment 12 times in 4 years indicates variable timing and strength of correlation between temperature and bacterial production, possibly due to bacterial community differences between sites. As indicated by both field and laboratory experiments, shifts in dominant community members can occur on ecologically relevant time scales (days), and have important implications for understanding the relationship of bacterial diversity and function.
Similar articles
-
Factors influencing bacterial dynamics along a transect from supraglacial runoff to proglacial lakes of a high Arctic glacier [corrected].FEMS Microbiol Ecol. 2007 Feb;59(2):307-17. doi: 10.1111/j.1574-6941.2006.00262.x. FEMS Microbiol Ecol. 2007. PMID: 17313580
-
The impact of temperature change on the activity and community composition of sulfate-reducing bacteria in arctic versus temperate marine sediments.Environ Microbiol. 2009 Jul;11(7):1692-703. doi: 10.1111/j.1462-2920.2009.01896.x. Epub 2009 Mar 17. Environ Microbiol. 2009. PMID: 19292778
-
Biogeography of bacterioplankton in lakes and streams of an Arctic tundra catchment.Ecology. 2007 Jun;88(6):1365-78. doi: 10.1890/06-0387. Ecology. 2007. PMID: 17601129
-
Aquatic bacterial diversity: Magnitude, dynamics, and controlling factors.Microb Pathog. 2017 Mar;104:39-47. doi: 10.1016/j.micpath.2017.01.016. Epub 2017 Jan 5. Microb Pathog. 2017. PMID: 28065819 Review.
-
Effects of long-term nutrient additions on Arctic tundra, stream, and lake ecosystems: beyond NPP.Oecologia. 2016 Nov;182(3):653-65. doi: 10.1007/s00442-016-3716-0. Epub 2016 Aug 31. Oecologia. 2016. PMID: 27582122 Review.
Cited by
-
Environmental Factors Affecting Microbiota Dynamics during Traditional Solid-state Fermentation of Chinese Daqu Starter.Front Microbiol. 2016 Aug 4;7:1237. doi: 10.3389/fmicb.2016.01237. eCollection 2016. Front Microbiol. 2016. PMID: 27540378 Free PMC article.
-
Phosphorus and Nitrogen Drive the Seasonal Dynamics of Bacterial Communities in Pinus Forest Rhizospheric Soil of the Qinling Mountains.Front Microbiol. 2018 Aug 27;9:1930. doi: 10.3389/fmicb.2018.01930. eCollection 2018. Front Microbiol. 2018. PMID: 30210463 Free PMC article.
-
An abrupt regime shift of bacterioplankton community from weak to strong thermal pollution in a subtropical bay.Front Microbiol. 2024 Apr 30;15:1395583. doi: 10.3389/fmicb.2024.1395583. eCollection 2024. Front Microbiol. 2024. PMID: 38746754 Free PMC article.
-
Bacterial Metabolic Activity of High-Mountain Lakes in a Context of Increasing Regional Temperature.Microorganisms. 2025 Jun 13;13(6):1375. doi: 10.3390/microorganisms13061375. Microorganisms. 2025. PMID: 40572263 Free PMC article.
-
Thermal discharge-created increasing temperatures alter the bacterioplankton composition and functional redundancy.AMB Express. 2016 Dec;6(1):68. doi: 10.1186/s13568-016-0238-4. Epub 2016 Sep 8. AMB Express. 2016. PMID: 27620732 Free PMC article.
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
Research Materials