@article {232,
	title = {Holocene changes in Proboscia diatom productivity in shelf waters of the north-western Antarctic Peninsula},
	journal = {Antarctic Science},
	volume = {22},
	year = {2010},
	note = {id: 789; 559YJ Times Cited:0 Cited References Count:51Y},
	pages = {3-10},
	abstract = {Diatoms are important primary producers in present day Antarctic waters but their relative significance in the past is less clear. In this Study We used long-chain diols to reconstruct Proboscia diatom productivity in shelf waters of the western Antarctic Peninsula over the last 8500 yr. Biomarker lipid analysis revealed the presence of a suite of long-chain diols in the sediments, mainly comprising the C-28 and C-30 1,14-diol isomers derived from Proboscia diatoms and C-28 and C-30 1,13-diols derived from other unknown algae. The relative importance of Proboscia diatoms was assessed using the relative abundances of 1, 14-diols versus 1, 13-diols, which showed that Proboscia diatoms were relatively more abundant during the Late Holocene, suggesting that stronger upwelling of circumpolar waters Occurred at that time. The variations in the diol index strongly correlate with melt events in the Siple Dome ice core, Suggesting that the climatic processes responsible for changes in mean summer temperature, open marine influence and atmospheric cyclonic activity recorded at Siple Dome, also controlled the productivity of Proboscia diatoms on the western Antarctic Peninsula region.},
	issn = {0954-1020},
	doi = {10.1017/S095410200999037x},
	author = {Willmott, V. and Rampen, S. W. and Domack, E. and Canals, M. and Damste, J. S. S. and Schouten, S.}
}
@article {457,
	title = {A radiocarbon-based assessment of the preservation characteristics of crenarchaeol and alkenones from continental margin sediments},
	journal = {Organic Geochemistry},
	volume = {39},
	year = {2008},
	note = {id: 883; 344AQ Times Cited:11 Cited References Count:33Y},
	pages = {1039-1045},
	abstract = {Crenarchaeotal glycerol dibiphytanyl glycerol tetraether (GDGT) lipids and alkenones are two types of biomarkers, derived from planktonic marine microorganisms, which are used for reconstruction of sea surface temperature. We determined the radiocarbon contents of the archaeal GDGT crenarchaeol and of alkenones isolated from continental margin sediments. Systematic differences were found between the two biomarkers, with higher radiocarbon content in crenarchaeol than in the phytoplankton-derived alkenones. These differences can be explained by variable contributions of pre-aged, laterally-advected material to the core sites. Crenarchaeol appears to be more efficiently degraded during transport in oxygen-replete environments than alkenones. Whether this reflects the influence of chemical structure or mode of protection (e.g., particle association) is not known. (C) 2008 Elsevier Ltd. All rights reserved.},
	issn = {0146-6380},
	doi = {10.1016/J.Orggeochem.2008.02.006},
	author = {Mollenhauer, G. and Eglinton, T. I. and HopmanSd, E. C. and Damste, J. S. S.}
}
@article {1897,
	title = {Aging of marine organic matter during cross-shelf lateral transport in the Benguela upwelling system revealed by compound-specific radiocarbon dating},
	journal = {Geochemistry Geophysics Geosystems},
	volume = {8},
	year = {2007},
	note = {213qvTimes Cited:3
Cited References Count:60
},
	month = {Sep 18},
	abstract = {Organic matter accumulation and burial on the Namibian shelf and upper slope are spatially heterogeneous and strongly controlled by lateral transport in subsurface nepheloid layers. Much of the material deposited in depo-centers on the slope ultimately derives from the shelf. Supply of organic matter from the shelf involves selective transport of organic matter. We studied these selective transport processes by analyzing the radiocarbon content of co-occurring sediment fractions. Here we present radiocarbon data for total organic carbon as well as three tracers of surface ocean productivity (phytoplankton-derived alkenones, membrane lipids of pelagic crenarchaeota (crenarchaeol), and calcareous microfossils of planktic foraminifera) in core-top and near-surface sediment samples. The samples were collected on the Namibian margin along a shelf-slope transect (85 to 1040 m) at 24 degrees S and from the upper slope depo-center at 25.5 degrees S. In core-top sediments, alkenone ages gradually increased from modern to 3490 radiocarbon years with distance from shore and with water depth. Crenarchaeol, while younger than alkenones, also increased in age with distance offshore. It was concluded that the observed ages were a consequence of cross-shelf transport and associated aging of organic matter. Radiocarbon ages of preserved lipid biomarkers in sediments thus at least partially depend on the relative amount of laterally supplied, pre-aged material present in a sample, highlighting the importance of nepheloid transport for the sedimentation of organic matter over the Namibian margin.},
	keywords = {alkenones, atlantic-ocean, burial, carbon accumulation, coastal, compound-specific radiocarbon dating, continental-margin, ionization mass-spectrometry, membrane-lipids, namibia, sea sediments, Sediment transport},
	isbn = {1525-2027},
	doi = {10.1029/2007GC001603},
	author = {Mollenhauer, G. and Inthorn, M. and Vogt, T. and Zabel, M. and Damste, J. S. S. and Eglinton, T. I.}
}
@article {574,
	title = {Pre- and post-industrial environmental changes as revealed by the biogeochemical sedimentary record of Drammensfjord, Norway},
	journal = {Marine Geology},
	volume = {214},
	year = {2005},
	note = {890unTimes Cited:23Cited References Count:105},
	month = {Jan 30},
	pages = {177-200},
	abstract = {The biogeochemical sedimentary record of the anoxic Drammensfjord, Norway, was investigated on a decadal to centennial time scale over the last millennium, in order to reconstruct the pre-industrial fjord environment and ecosystem and human-induced environmental changes. The sediments were dated by a combination of C-14 and Pb-210 analysis and varve counting. Analysis of the bulk sedimentary parameters and of the biomarker distribution revealed that the sedimentary organic matter of the fjord is primarily of terrigetious origin, indicating that the fjord was oligotrophic or mesotrophic. The fjord{\textquoteright}s bottom water has been continuously euxinic since at least 1000 AD, but photic zone euxinia occurred only irregularly in the fjord. The organic matter flux and composition remained virtually invariable until the 18th century. After that time, the flux of material derived from coniferous trees started to increase, indicated by elevated concentrations of dehydroabietic acid and related compounds, but also by raising levels of C-24 n-alcohols and fatty acids. This marked the onset of sawmill activities in the hinterland. After the beginning of the industrial revolution, around 1850, the flux of organic waste from sawmills and paper mills increased substantially. It is suggested that slow bacterial degradation of this relatively nutrient-poor organic waste caused a gradual eutrophication trend, which is reflected in substantial increased bacterial and moderately increased other aquatic biomarker accumulation rates. After the industrial revolution, this trend accelerated and was possibly enhanced by a growing population of the area with accompanymg agricultural and domestic waste. This promoted primary productivity and changed the phytoplankton composition in the fjord.(C) 2004 Elsevier B.V. All rights reserved.},
	issn = {0025-3227},
	doi = {10.1016/j.margeo.2004.10.029},
	author = {Smittenberg, R. H. and Baas, M. and Green, M. J. and Hopmans, E. C. and Schouten, S. and Damste, J. S. S.}
}
@article {2020,
	title = {Compound-specific radiocarbon dating of the varved Holocene sedimentary record of Saanich Inlet, Canada},
	journal = {Paleoceanography},
	volume = {19},
	year = {2004},
	note = {819piTimes Cited:18
Cited References Count:69
},
	month = {May 1},
	abstract = {[1] The radiocarbon contents of various biomarkers extracted from the varve-counted sediments of Saanich Inlet, Canada, were determined to assess their applicability for dating purposes. Calibrated ages obtained from the marine planktonic archaeal biomarker crenarchaeol compared favorably with varve-count ages. The same conclusion could be drawn for a more general archaeal biomarker (GDGT-0), although this biomarker proved to be less reliable due to its less-specific origin. The results also lend support to earlier indications that marine crenarchaeota use dissolved inorganic carbon (DIC) as their carbon source. The average reservoir age offset DeltaR of 430 years, determined using the crenarchaeol radiocarbon ages, varied by +/-110 years. This may be caused by natural variations in ocean-atmosphere mixing or upwelling at the NE Pacific coast but variability may also be due to an inconsistency in the marine calibration curve when used at sites with high reservoir ages.},
	keywords = {british-columbia, compound-specific radiocarbon dating, crenarchaeol, ionization mass-spectrometry, marine-sediments, mediterranean sea, membrane-lipids, ne pacific, odp leg 169s, organic-matter, pacific-ocean, rapid isolation, Reservoir age, reservoir ages, saanich inlet},
	isbn = {0883-8305},
	doi = {10.1029/2003PA000927},
	url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2\&amp;SrcAuth=Alerting\&amp;SrcApp=Alerting\&amp;DestApp=WOS\&amp;DestLinkType=FullRecord;UT=WOS:000221326700001},
	author = {Smittenberg, R. H. and Hopmans, E. C. and Schouten, S. and Hayes, J. M. and Eglinton, T. I. and Damste, J. S. S.}
}
@article {415,
	title = {Carbon isotopic compositions of prokaryotic lipids as tracers of carbon cycling in diverse settings},
	journal = {Chemical Geology},
	volume = {195},
	year = {2003},
	note = {id: 1331; 666LX Times Cited:59 Cited References Count:144},
	pages = {29-58},
	abstract = {Recent work has highlighted the ubiquity of bacteria and archaea and continues to affirm their significance in diverse biogeochemical processes. The delta(13)C values and distributions of diagnostic lipids derived from such microorganisms can provide insights into prokaryotic processes in modem settings and are one of the few means by which past prokaryotic processes in depositional settings can be elucidated. Here we present a brief review of prokaryotic lipids commonly observed in sediments and the controls on their carbon isotopic compositions. We then present two case studies-one of Mediterranean cold seeps at which anaerobic oxidation of methane occurs and one of a Holocene peat deposit in which a variety of aerobic and anaerobic microorganisms govern the degradation of organic matter. These two studies illustrate the potential utility of compound-specific carbon isotope analyses to deconvolute pathways of carbon flow in microbial communities. (C) 2002 Elsevier Science B.V. All rights reserved.},
	issn = {0009-2541},
	doi = {10.1016/S0009-2541(02)00387-X},
	author = {Pancost, R. D. and Damste, J. S. S.}
}
