Stable carbon isotope biogeochemistry of lakes along a trophic gradient

Kluijver, A. de; Schoon, Petra L; Downing, John A.; Schouten, Stefan; Middelburg, Jack J.

doi:10.5194/bg-11-6265-2014

Cited by 39 publications

(36 citation statements)

References 62 publications

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“…In total 22 lakes were examined, 10 from the U.S. state of Iowa and 12 from the state of Minnesota (Table ). These lakes have previously been assigned as either eutrophic lakes (all of the Iowa lakes plus the Minnesota lake Little Splithand, n = 11) or oligo‐mesotrophic lakes (all remaining Minnesota lakes, n = 11) based on their average summer total P (TP) concentration as described in de Kluijver et al (). The trophic state of the eutrophic lakes is caused by high nutrient loads from agricultural run‐off (Arbuckle and Downing ), while the oligo‐mesotrophic lakes in the forested area of Minnesota are relatively pristine in nature.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, oligo‐mesotrophic lakes, where DOC concentrations are equal to or higher than POC concentrations, have been shown to be dominated by heterotrophic bacterial processes compared to eutrophic lakes (Biddanda et al ). de Kluijver et al () reported the concentration of phytoplankton derived C (C phyto , based on chlorophyll a concentration and summed concentration of phytoplankton derived FAs) and bacterial derived C (C bac , based on the summed concentration of bacterial specific FAs) for the Iowa and Minnesota lakes. The ratio of C bac to C phyt was indeed higher in the Minnesota lakes (av.…”

Section: Discussionmentioning

confidence: 99%

“…The lakes were sampled between July 20 th , 2009 and August 12 th , 2009 (de Kluijver et al ). Water samples for lipid analysis were collected from the deepest part of the lake within the mixed‐zone layer (∼2 m below surface) and transferred in precleaned 1 L bottles and subsequently transported on ice to the Limnology Laboratory of Iowa State University.…”

Section: Methodsmentioning

confidence: 99%

“…Background data are available as part of a long‐term lake monitoring program and can be found at http://limnology.eeob.iastate.edu/lakereport and http://limnoweb.eeob.iastate.edu/itascalakes as well as in de Kluijver () and de Kluijver et al (). For details of sampling and analysis for environmental data see de Kluijver et al () and Schoon et al (). For details of the collection and analysis of samples for phytoplankton biomass data, see Filstrup et al ().…”

Section: Methodsmentioning

confidence: 99%

“…We hypothesized that the IPL composition of the lake SPM will be different depending on the trophic states of lake, due to the difference in the lakes' microbial composition and adaptations of microbes to different environmental conditions. To test this hypothesis, we analyzed the IPL composition of SPM in surface waters from lakes from the U.S.A. states of Iowa and Minnesota: eleven eutrophic lakes and eleven oligo‐mesotrophic lakes (de Kluijver ; de Kluijver et al ). We determined the general structural diversity of diacyl‐ and lyso‐IPLs and compared this with the trophic nature of the lakes.…”

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Impact of trophic state on the distribution of intact polar lipids in surface waters of lakes

Bale

Hopmans

Schoon

et al. 2016

Limnology & Oceanography

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We characterized the intact polar lipid (IPL) composition in the surface waters of 22 lakes from Minnesota and Iowa, ranging in trophic state between eutrophic and oligo-mesotrophic, to investigate the impact of trophic state on IPL composition. A high diversity of IPL classes was detected. Most IPL classes were detected in all lakes, but the eutrophic lakes contained a significantly higher relative abundance of lysophosphatidylcholine (PC) than the oligo-mesotrophic lakes, which in turn were characterized by significantly higher relative abundance of hydroxymethyltrimethyl-alanine/trimethyl-homoserine (DGTA/DGTS) betaines, ornithine lipids and the recently discovered trimethyl ornithine (TMO) lipids. The higher relative abundance of ornithines and TMOs may relate to a higher contribution of heterotrophic bacteria relative to phytoplankton while the higher abundance of the DGTA/DGTS betaines may relate to substitution by microorganisms of these non-P lipids for PC under P-stress, as has been observed in other environments. We also detected a variety of heterocyst glycolipids (HGs) derived from N 2 -fixing heterocystous Cyanobacteria in all lakes, suggesting the presence of these Cyanobacteria in the full range of trophic conditions. Correlation of HG abundance with environmental data showed that high productivity lakes have high HG abundances, while other distributional differences in HGs, which did not correlate with environmental parameters, are likely due to differences in species composition. We conclude that the significant differences in IPL composition between the eutrophic and oligo-mesotrophic lakes are either due to adaptation of the membrane composition to nutrient conditions or due to general divergences in microbial composition under the different conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Impact of trophic state on the distribution of intact polar lipids in surface waters of lakes

Bale

Hopmans

Schoon

et al. 2016

Limnology & Oceanography

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Biomarker hydrogen isotope composition (δD) as proxy for Holocene hydroclimatic change and seismic activity in SW Peloponnese, Greece

Norström¹,

Katrantsiotis²,

Finné³

et al. 2018

J Quaternary Science

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We present a 6000‐year‐long record tracing hydroclimate changes in SW Greece, based on hydrogen isotope composition of aquatic plant‐derived n‐C23 alkanes (δDC23) in a sediment core from the Messenian plain, Peloponnese. The δDC23 record co‐varies with other eastern Mediterranean records, suggesting relatively wetter conditions c. 6–4.5 ka, followed by progressively drier conditions leading up to maximum aridity c. 2.8 ka. This arid phase was interrupted by a shift in δDC23 between 3.3 and 3.1 ka inferring wetter conditions and/or tentative responses to anthropogenic water regulating activities during the Late Bronze Age. After 2.7 ka, a return to more humid conditions was followed by increased dryness and stronger seasonality contrasts from c. 2.0 ka. The δDC23 record shows three short‐lived excursions (5.7, 5.3, 2.8 ka), where isotope values dropped by >20‰ and immediately stabilized again. The events were paralleled by abrupt increases in sedimentation rates. We hypothesize that the isotopic shifts represent a response to mixing of ground water systems during tectonic events, followed by sealing of seismically derived cracks in the active fault. The outcome of the study is promising for future expansion of isotope‐based proxies on sediments in the region, to reconstruct both hydroclimate and past seismic activity.

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Methane oxidation pathways and associated methanotrophic communities in the water column of a tropical lake

et al. 2015

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We examined methane (CH 4 ) oxidation pathways and associated methanotrophic communities in the water column of Lake Kivu using abundance and isotopic compositions of CH 4 and phospholipid fatty acids (PLFA), distributions of glycerol dialkyl glycerol tetraethers, and catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH) analysis. The carbon isotopic data of CH 4 indicate that aerobic CH 4 oxidation is the predominant pathway of microbial CH 4 consumption with an isotopic fractionation factor (a) of 1.022-1.038. A small amount of CH 4 is oxidized anaerobically, with an a of 1.002-1.006. Aerobic CH 4 oxidation is mediated by type II methane-oxidizing bacteria (type II MOB) based on the 13 C depletion (d 13 C of 240.5& to 243.7&) of diagnostic C18:1x7 fatty acids in the surface waters. CARD-FISH images and PLFA components C16:1x7 and C16:1x5 indicate the presence of type I MOB in the methane and nutrient-rich deep-water region. 13 C depletion of C16:1x7 and C16:1x5 (d 13 C, 240& to 250.6&) in the lake water below 52 m suggests the involvement of type I MOB in methane oxidation in the anoxic deep-water regions of the lake. A novel cluster of anaerobic methane-oxidizing archaea (ANME) rather than the known ANME-1 and ANME-2 appear to be involved in anaerobic oxidation of methane (AOM). Sulfate reducing bacteria are associated with AOM in the lake based on the 13 C depletion (d 13 C, 238.2& to 245.0&) of anteiso-methyl-C15:0 fatty acid. Methane constitutes an important carbon and energy source (up to 38%) for the heterotrophic and autotrophic communities in the lake.The emission of CH 4 from freshwater lakes (estimated at 8-48 Tg CH 4 per annum) constitutes an important component of the global CH 4 budget (about 6-16% of annual global CH 4 emissions; Bastviken et al. 2004) and is higher than the annual CH 4 emissions from the oceans (2% of annual global CH 4 emissions; Reeburgh 2007). The amount of CH 4 emitted from freshwater and marine systems to the atmosphere is just a small fraction of the CH 4 produced in these systems as microbially mediated CH 4 oxidation in the sediments and water columns of these systems mitigates CH 4 flux to the atmosphere. Studies show that 80-90% of CH 4 produced in freshwater and marine systems is degraded or removed through anaerobic and aerobic CH 4 oxidation (Reeburgh 2007).Anaerobic oxidation of methane (AOM) can be driven by sulfate as the electron acceptor and is mediated by anaerobic methane-oxidizing archaea (ANME) alone (Milucka et al. 2012) or ANME in a consortium with sulfate reducing bacteria (SRB) (Boetius et al. 2000); this process has been observed in sediments and water columns of marine aquatic systems (Knittel and Boetius 2009). Alternative electron acceptors such as nitrate (Ettwig et al. 2008;Haroon et al. 2013) and nitrite (Ettwig et al. 2010) have been observed to oxidize CH 4 in sediments but not in the water columns of aquatic systems, whereas iron and manganese have been observed in the sediments (Beal et al. 2009) and water colum...

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Stable carbon isotope biogeochemistry of lakes along a trophic gradient

Cited by 39 publications

References 62 publications

Impact of trophic state on the distribution of intact polar lipids in surface waters of lakes

Impact of trophic state on the distribution of intact polar lipids in surface waters of lakes

Biomarker hydrogen isotope composition (δD) as proxy for Holocene hydroclimatic change and seismic activity in SW Peloponnese, Greece

Methane oxidation pathways and associated methanotrophic communities in the water column of a tropical lake

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