0000000000311565

AUTHOR

Päivi Johanna Rinta

showing 2 related works from this author

Abundance and δ13C values of fatty acids in lacustrine surface sediments: Relationships with in-lake methane concentrations

2018

Proxy-indicators in lake sediments provide the only approach by which the dynamics of in-lake methane cycling can be examined on multi-decadal to centennial time scales. This information is necessary to constrain how lacustrine methane production, oxidation and emissions are expected to respond to global change drivers. Several of the available proxies for reconstructing methane cycle changes of lakes rely on interpreting past changes in the abundance or relevance of methane oxidizing bacteria (MOB), either directly (e.g. via analysis of bacterial lipids) or indirectly (e.g. via reconstructions of the past relevance of MOB in invertebrate diet). However, only limited information is availabl…

0301 basic medicineArcheologyMethane Fatty acids Methane oxidizing bacteria Stable carbon isotopes Aquatic invertebrates Lakes Sediment010504 meteorology & atmospheric sciencesmethane oxidizing bacteriaaquatic invertebrates030106 microbiologyrasvahapotAquatic invertebratessedimentit01 natural sciencesmetaanijärvetMethanestable carbon isotopes03 medical and health scienceschemistry.chemical_compoundStable carbon isotopesAbundance (ecology)EcosystemOrganic matterFatty acidsEcology Evolution Behavior and Systematics0105 earth and related environmental scienceschemistry.chemical_classificationGlobal and Planetary Changeisotoopitδ13CLake ecosystemSedimentGeology15. Life on landselkärangattomatAnoxic watersLakeschemistrysedimentMethane oxidizing bacteria13. Climate actionEnvironmental chemistryinternationalta1181SedimentMethaneQuaternary Science Reviews
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Flotsam samples can help explain the δ13C and δ15N values of invertebrate resting stages in lake sediment

2018

Abstract The stable isotopic composition of chitinous remains of Cladocera (water fleas) and freshwater Bryozoa (moss animals) preserved in lake sediment records can provide supporting insights into past environmental and ecosystem changes in lakes. Here we explore whether analyses of these remains isolated from lake flotsam can provide information on the driving variables affecting the isotopic composition of these remains. We collected flotsam in 53 lakes and found enough material in 33 lakes to measure the stable carbon and nitrogen isotope ratios (expressed as δ13C and δ15N values, respectively) of resting stages. These values were compared with lake characteristics, water chemistry mea…

flotsam0106 biological sciencesArcheology010504 meteorology & atmospheric sciencesta1171stable isotopessedimentitjärvet01 natural scienceslakesPhytoplanktonSedimentary organic matterEcology Evolution Behavior and SystematicsEphippia0105 earth and related environmental sciencesisotoopitGlobal and Planetary Changeδ13CbiologyStable isotope ratiomethane010604 marine biology & hydrobiologySedimentGeologyδ15NselkärangattomatPlanktoninvertebratesbiology.organism_classificationOceanographystatoblastssedimentta1181Environmental scienceorgaaninen ainesephippiaQuaternary Science Reviews
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