Using the C/N ratio to estimate terrigenous inputs of organic matter to aquatic environments

Perdue, Edward M.; Koprivnjak, Jean-François

doi:10.1016/j.ecss.2006.12.021

Cited by 218 publications

(113 citation statements)

References 17 publications

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“…C/N ratios are often used to differentiate marine from terrestrial organic matter (Redfield et al 1963;Atkinson and Smith 1983;Perdue and Koprivnjak 2007), although selective degradation of different minerals in sediments can affect the C/N ratios of organic matter (Muller 1997). Organic matter should have a C/N ratio lower than 17 in order to be of nutritional use to invertebrates (Russel Hunter 1970).…”

Section: Discussionmentioning

confidence: 99%

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Akhil¹,

Nair²,

Sujatha³

2013

J Earth Syst Sci

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Section: Discussionmentioning

confidence: 99%

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Akhil¹,

Nair²,

Sujatha³

2013

J Earth Syst Sci

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“…One of the main advantages of this approach is that it allows the estimation of the relative proportions of marine and terrestrial organic carbon preserved in sediments (e.g., Perdue and Koprivnjak, 2007). Organic-based proxies are however not applicable to sediments with very low TOC, such as those deposited in glacio-marine environments.…”

Section: Mineralogical Sorting During Sedimentary Transportmentioning

confidence: 99%

“…TI is calculated as the score of the first axis of a PCA (Fig. 2) that comprises (1) spring salinity data averaged over the upper 10 m (2, 5 and 10 m depth data, collected during leg 2 of CF7 cruise in November 2001), and (2) the fraction of terrestrial organic carbon (F terr ), which is calculated from the N/C ratio of the bulk sedimentary organic matter (Perdue and Koprivnjak, 2007;data in Fig. 3 and Table 2).…”

Section: Calculation Of a Terrestrial Indexmentioning

confidence: 99%

Geochemistry of surface sediments from the fjords of Northern Chilean Patagonia (44–47°S): Spatial variability and implications for paleoclimate reconstructions

Bertrand

Hughen

Sepúlveda

et al. 2012

Geochimica et Cosmochimica Acta

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“…The validity of these end-member values was recently confirmed by a study in the southern coast of Finland, where sediment N/C values for sediment OM covering a transect along the Pojo Bay from the river-mouth to the open Baltic Sea were reported . To obtain the desired fraction of terrestrially derived Corg rather than Norg from this mixing model, we use N/C instead of C/N ratio for the calculation (Perdue and Koprivnjak, 2007). Elsewhere in the text and in the figures we refer to the more commonly used C/N ratio.…”

Section: Carbon and Nitrogen Contents And Stable Isotope Ratiosmentioning

confidence: 99%

A 1500-year multiproxy record of coastal hypoxia from the northern Baltic Sea indicates unprecedented deoxygenation over the 20<sup>th</sup> century

Jokinen¹,

Virtasalo²,

Jilbert³

et al. 2018

Preprint

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Abstract. The anthropogenically forced expansion of coastal hypoxia is a major environmental problem affecting coastal ecosystems and biogeochemical cycles throughout the world. The Baltic Sea is a semi-enclosed shelf sea whose central deep basins have been highly prone to deoxygenation during its Holocene history, as shown previously by numerous paleoenvironmental studies. However, long-term data on past fluctuations in the intensity of hypoxia in the coastal zone of the Baltic Sea are largely lacking, despite the significant role of these areas in retaining nutrients derived from the catchment.Here 5 we present a 1500-year multiproxy record of near-bottom water redox changes from the coastal zone of the northern Baltic Sea, encompassing the climatic phases of the Medieval Climate Anomaly (MCA), the Little Ice Age (LIA), and the Modern Warm Period (MoWP). Our reconstruction shows that although multicentennial climate variability has modulated depositional conditions and delivery of organic matter (OM) to the basin the modern aggravation of coastal hypoxia is unprecedented, and besides gradual changes in the basin configuration, it must have been forced by excess human-induced nutrient loading. The 10 progressive deoxygenation since the beginning of 1900s was originally triggered by the combined effects of gradual shoaling of the basin and warming climate, which amplified sediment focusing and increased the vulnerability to hypoxia. Importantly, the anthropogenic eutrophication of coastal waters in our study area began decades earlier than previously thought, leading to a marked aggravation of hypoxia in the 1950s through fueling primary productivity, while we find no evidence of anthropogenic forcing during the MCA. These results have implications for the assessment of reference conditions for coastal 15 water quality. Furthermore, this study highlights the need for combined use of sedimentological, ichnological, and geochemical proxies in order to robustly reconstruct subtle redox shifts especially in dynamic, non-euxinic coastal settings with strong seasonal contrasts in the bottom water quality. 25Biogeosciences Discuss., https://doi

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Using the C/N ratio to estimate terrigenous inputs of organic matter to aquatic environments

Cited by 218 publications

References 17 publications

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Geochemistry of surface sediments from the fjords of Northern Chilean Patagonia (44–47°S): Spatial variability and implications for paleoclimate reconstructions

A 1500-year multiproxy record of coastal hypoxia from the northern Baltic Sea indicates unprecedented deoxygenation over the 20<sup>th</sup> century

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Using the C/N ratio to estimate terrigenous inputs of organic matter to aquatic environments

Cited by 218 publications

References 17 publications

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Core sediment biogeochemistry in specific zones of Cochin Estuarine System (CES)

Geochemistry of surface sediments from the fjords of Northern Chilean Patagonia (44–47°S): Spatial variability and implications for paleoclimate reconstructions

A 1500-year multiproxy record of coastal hypoxia from the northern Baltic Sea indicates unprecedented deoxygenation over the 20&lt;sup&gt;th&lt;/sup&gt; century

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A 1500-year multiproxy record of coastal hypoxia from the northern Baltic Sea indicates unprecedented deoxygenation over the 20<sup>th</sup> century