Molecular proxies as indicators of freshwater incursion-driven salinity stratification
MetadataShow full item record
Salinity-related stratification in marine environments is one of the main drivers for the development of persistent anoxia and euxinia. It therefore plays a vital role in the sedimentary preservation of organic matter and has also been associated with Oceanic Anoxic Events during several mass extinctions in Earth's history. Here we present a novel molecular proxy using relative abundances of methyltrimethyltridecylchromans (MTTCs) as indicators of riverine freshwater incursions into Middle to Late Devonian paleoreefs exposed to conditions of prevailing anoxia, photic zone euxinia and water column stratification. This paper aims at re-instigating a discussion about the origin of these compounds to potentially broaden their utilization as paleoproxies, adding freshwater stratification to the general salinity reconstructions. The co-variation of MTTC abundance profiles and δ13C values with other biomarker parameters in the sediments studied here indicate a link of MTTCs to terrigenous input, pointing towards a previously suggested early diagenetic formation of these compounds from phytol with higher plant-derived alkylphenols.
Showing items related by title, author, creator and subject.
The EU-AIMS Longitudinal European Autism Project (LEAP): Design and methodologies to identify and validate stratification biomarkers for autism spectrum disordersLoth, E.; Charman, T.; Mason, L.; Tillmann, J.; Jones, E.; Wooldridge, C.; Ahmad, J.; Auyeung, B.; Brogna, C.; Ambrosino, S.; Banaschewski, T.; Baron-Cohen, S.; Baumeister, S.; Beckmann, C.; Brammer, M.; Brandeis, D.; Bolte, Sven; Bourgeron, T.; Bours, C.; De Bruijn, Y.; Chakrabarti, B.; Crawley, D.; Cornelissen, I.; Acqua, F.; Dumas, G.; Durston, S.; Ecker, C.; Faulkner, J.; Frouin, V.; Garces, P.; Goyard, D.; Hayward, H.; Ham, L.; Hipp, J.; Holt, R.; Johnson, M.; Isaksson, J.; Kundu, P.; Lai, M.; D'Ardhuy, X.; Lombardo, M.; Lythgoe, D.; Mandl, R.; Meyer-Lindenberg, A.; Moessnang, C.; Mueller, N.; O'Dwyer, L.; Oldehinkel, M.; Oranje, B.; Pandina, G.; Persico, A.; Ruigrok, A.; Ruggeri, B.; Sabet, J.; Sacco, R.; Cáceres, A.; Simonoff, E.; Toro, R.; Tost, H.; Waldman, J.; Williams, S.; Zwiers, M.; Spooren, W.; Murphy, D.; Buitelaar, J. (2017)Â© 2017 The Author(s). Background: The tremendous clinical and aetiological diversity among individuals with autism spectrum disorder (ASD) has been a major obstacle to the development of new treatments, as many may only ...
Invasive macrophytes control the spatial and temporal patterns of temperature and dissolved oxygen in a shallow lake: A proposed feedback mechanism of macrophyte lossVilas, M.; Marti, Clelia; Adams, M.; Oldham, C.; Hipsey, M. (2017)© 2017 Vilas, Marti, Adams, Oldham and Hipsey. Submerged macrophytes can have a profound effect on shallow lake ecosystems through their ability to modify the thermal structure and dissolved oxygen levels within the lake. ...
Van Heijningen, E.; Lansdorp_Vogelaar, Iris; Van Hees, F.; Kuipers, E.; Biermann, K.; De Koning, H.; Van Ballegooijen, M.; Steyerberg, E. (2016)Background and study aims: Current surveillance guidelines risk stratify patients with adenoma by using only one or two factors: adenoma multiplicity or presence of an advanced adenoma characteristic. Combinations of ...