Elevated levels of dimethylated‐sulfur compounds in Lake Bonney, a poorly ventilated Antarctic lake

Lee, Peter A.; Priscu, John C.; DiTullio, Giacomo R.; Riseman, S. F.; Tursich, Nicole; Mora, Stephen J. de

doi:10.4319/lo.2004.49.4.1044

Cited by 22 publications

(22 citation statements)

References 55 publications

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“…The claim of having the highest DMS concentrations of any natural aquatic environment was made previously in the hypersaline, meromictic Organic Lake, Antarctica (Gibson et al 1991) and again in the permanently ice-covered Lake Bonney, Antarctica (Lee et al 2004). A concentration of 4.4 mmol L 21 of DMS was detected in the anoxylimnion, which was reported to be a result of the degradation of DMSP, in Organic Lake and .0.3 mmol L 21 in Lake Bonney (Gibson et al 1991;Lee et al 2004). …”

Section: Discussionmentioning

confidence: 88%

“…Although the volume of the world's saline lakes is almost as great as the volume of the world's freshwater lakes (Hammer 1986), little research has been conducted on DMS in saline to hypersaline lakes. Moreover, the studies conducted on such systems have generally been limited to meromictic lakes or permanently ice-covered lakes in Antarctica (Roberts et al 1993;Lee et al 2004).…”

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confidence: 99%

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Dimethyl sulfide production in a saline eutrophic lake, Salton Sea, California

Reese

Anderson

2009

Limnol. Oceanogr.

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The concentrations and distribution of volatile organic sulfur compounds were quantified over a 13-month period in the Salton Sea, a warm eutrophic saline lake in Southern California, U.S.A. The concentrations of dimethyl sulfide (DMS) appear to be the highest reported thus far for a natural body of water, with an average surface (0-2 m) concentration of 2.5 mmol L 21 . DMS concentrations as high as 11 mmol L 21 were measured, and the concentrations of DMS correlated strongly with chlorophyll a (r 2 5 0.62, n 5 265, p , 0.05). Dimethyl disulfide was also measured; concentrations were much lower than DMS and often below detection (,0.01-0.32 mmol L 21 ). Carbon disulfide concentrations were low (,0.03 mmol L 21 ) and associated with strongly reduced conditions. Very high concentrations of dimethylsulfoniopropionate (DMSP), an osmolyte in marine algae, were also measured (average total DMSP of 2.4 mmol L 21 ), with concentrations strongly correlated with chlorophyll a (r 2 5 0.88, n 5 36, p , 0.05). The biomass of the Salton Sea is composed mostly of marine phytoplankton species that are high DMSP producers; based on the correlations of DMS, chlorophyll a, and DMSP, it appears that the DMS in the Salton Sea is directly linked to algal biomass through DMSP. As a result of its very high DMS concentrations, the average estimated volatilization at the Salton Sea (480 mmol m 22 d 21 ) was greater than estimates for other lakes and the open ocean. We calculate ,9.6 3 10 5 mol of DMS was volatilized off the surface of the Sea during the course of this study.

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Section: Discussionmentioning

confidence: 88%

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confidence: 99%

Dimethyl sulfide production in a saline eutrophic lake, Salton Sea, California

Reese

Anderson

2009

Limnol. Oceanogr.

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“…S1 in the supplemental material). Isochrysis populations also occur at the same depth as high concentrations of dimethylsulfide in Lake Bonney, and they may produce biogenic sulfur compounds as cryoprotectants (20). While regulation of RubisCO enzyme activity is complex, most phototrophic organisms actively transcribe the gene encoding the large subunit, and the rbcL gene copy number, transcript abundance, and phylogenetic diversity have been applied as molecular indicators of carbon fixation potential in aquatic environments (13-15, 28, 32, 53, 54).…”

Section: Discussionmentioning

confidence: 99%

Diversity and Expression of RubisCO Genes in a Perennially Ice-Covered Antarctic Lake during the Polar Night Transition

Kong

Ream

Priscu

et al. 2012

Appl Environ Microbiol

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102

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ABSTRACTThe autotrophic communities in the lakes of the McMurdo Dry Valleys, Antarctica, have generated interest since the early 1960s owing to low light transmission through the permanent ice covers, a strongly bimodal seasonal light cycle, constant cold water temperatures, and geographical isolation. Previous work has shown that autotrophic carbon fixation in these lakes provides an important source of organic matter to this polar desert. Lake Bonney has two lobes separated by a shallow sill and is one of several chemically stratified lakes in the dry valleys that support year-round biological activity. As part of an International Polar Year initiative, we monitored the diversity and abundance of major isoforms of RubisCO in Lake Bonney by using a combined sequencing and quantitative PCR approach during the transition from summer to polar winter. Form ID RubisCO genes related to a stramenopile, a haptophyte, and a cryptophyte were identified, while primers specific for form IA/B RubisCO detected a diverse autotrophic community of chlorophytes, cyanobacteria, and chemoautotrophic proteobacteria. Form ID RubisCO dominated phytoplankton communities in both lobes of the lake and closely matched depth profiles for photosynthesis and chlorophyll. Our results indicate a coupling between light availability, photosynthesis, andrbcLmRNA levels in deep phytoplankton populations. Regulatory control ofrbcLin phytoplankton living in nutrient-deprived shallow depths does not appear to be solely light dependent. The distinct water chemistries of the east and west lobes have resulted in depth- and lobe-dependent variability in RubisCO diversity, which plays a role in transcriptional activity of the key gene responsible for carbon fixation.

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“…Methane production has been documented in oxygenated seawater (Karl et al, 2008, Damm et al, 2010 and an oxygenated oligotrophic lake, where planktonic and phytoplankton-attached Archaea actively transcribed the methyl coenzyme M reductase A gene for methanogenesis (Grossart et al, 2011). Damm et al (2010) and Grossart et al (2011) both connected methanogenesis in oxygenated water to phytoplankton activity, and the high concentrations of DMSP in WLB at 13 m (Lee et al, 2004) may provide a substrate pool for methanogenesis through its degradation product methanethiol (Damm et al, 2010). Although the metabolic state of the putatively Figure 4 Relative abundances (%) of bacterial (a), archaeal (b) and eukaryotic (c) OTUs during summer and autumn.…”

Section: Antarctic Lake Microbial Communities During the Polar Night mentioning

confidence: 99%

Modular community structure suggests metabolic plasticity during the transition to polar night in ice-covered Antarctic lakes

2013

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High-latitude environments, such as the Antarctic McMurdo Dry Valley lakes, are subject to seasonally segregated light-dark cycles, which have important consequences for microbial diversity and function on an annual basis. Owing largely to the logistical difficulties of sampling polar environments during the darkness of winter, little is known about planktonic microbial community responses to the cessation of photosynthetic primary production during the austral sunset, which lingers from approximately February to April. Here, we hypothesized that changes in bacterial, archaeal and eukaryotic community structure, particularly shifts in favor of chemolithotrophs and mixotrophs, would manifest during the transition to polar night. Our work represents the first concurrent molecular characterization, using 454 pyrosequencing of hypervariable regions of the small-subunit ribosomal RNA gene, of bacterial, archaeal and eukaryotic communities in permanently ice-covered lakes Fryxell and Bonney, before and during the polar night transition. We found vertically stratified populations that varied at the community and/or operational taxonomic unit-level between lakes and seasons. Network analysis based on operational taxonomic unit level interactions revealed nonrandomly structured microbial communities organized into modules (groups of taxa) containing key metabolic potential capacities, including photoheterotrophy, mixotrophy and chemolithotrophy, which are likely to be differentially favored during the transition to polar night.

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Elevated levels of dimethylated‐sulfur compounds in Lake Bonney, a poorly ventilated Antarctic lake

Cited by 22 publications

References 55 publications

Dimethyl sulfide production in a saline eutrophic lake, Salton Sea, California

Dimethyl sulfide production in a saline eutrophic lake, Salton Sea, California

Diversity and Expression of RubisCO Genes in a Perennially Ice-Covered Antarctic Lake during the Polar Night Transition

Modular community structure suggests metabolic plasticity during the transition to polar night in ice-covered Antarctic lakes

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