Biomarkers in surface sediments from the Cross River and estuary system, SE Nigeria: Assessment of organic matter sources of natural and anthropogenic origins

Pisani, Oliva; Orós, Daniel; Oyo-Ita, Orok E.; Ekpo, Bassey O.; Jaffé, Rudolf; Simoneit, Bernd R.T.

doi:10.1016/j.apgeochem.2013.01.010

Cited by 52 publications

(15 citation statements)

References 56 publications

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“…The ratio of short-(\C 20 ) to long-chain (CC 20 ) aliphatics potentially indicates microbial inputs to stream sediments (Pisani et al 2013). Based on this ratio, the sediments at site #1 receive more such fresh, autochthonous contributions compared to the other sites (Table 2).…”

Section: Aliphatic Compoundsmentioning

confidence: 99%

Characterizing organic matter inputs to sediments of small, intermittent, prairie streams: a molecular marker and stable isotope approach

2015

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Small rivers and streams are ecologically important because they contribute to the export of organic carbon to coastal environments, likely influencing the global carbon cycle. While organic matter (OM) dynamics in large rivers has been studied in quite some detail, less is known about small streams. Sources of OM in streams ultimately determine its availability to the food web and downstream transport. In this study, sediment samples were collected from the King's Creek watershed in Konza Prairie (Kansas, USA) and analyzed using molecular biomarkers and bulk 13 C stable isotopes with the objective to comparatively assess OM inputs between riparian forest vegetation and watershed grassland to small, intermittent streams. We are interested in the potential influence of woody riparian expansion that has been ongoing at the site. Biomarkers typical of the local C 4 grasses (branched nalkanes, phytadienes) were more abundant in some of the sediments of the upper reaches. The sediments of the lower reaches contained biomarkers of algae (short-chain aliphatic compounds, C 25:5 highly branched isoprenoid, brassicasterol) and vascular plant-derived material (triterpenols). Degraded OM (triterpene/triterpenol ratio) was found throughout the watershed with no pattern between the upper and lower reaches. Bulk 13 C isotope analysis showed that the upper reaches of the watershed receive significant OM inputs from the C 4 grasses (74-99 %) while the lower reaches are more strongly influenced by riparian trees (26-27 %) and algae (21-22 %). These results suggest that the environmental dynamics of bulk OM and the biomarker composition of small prairie streams are highly complex and likely a function of several factors such as light availability, riparian vegetative composition and density, and varying degrees of OM storage, retention and transport along the river continuum.

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Section: Aliphatic Compoundsmentioning

confidence: 99%

Characterizing organic matter inputs to sediments of small, intermittent, prairie streams: a molecular marker and stable isotope approach

2015

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“…Eglinton et al, 1962;Cranwell et al, 1987;Volkman et al, 1998;Zhang et al, 2003Zhang et al, , 2004Zhang et al, , 2006Zhang et al, , 2014, but also used in estuarine sediment to investigate the source of organic matter (e.g. Volkman, 1986;Prahl et al, 1994;Ohkouchi et al, 1997;Xu et al, 2006;Pisani et al, 2013). For example, Prahl et al (1994) applied long-chain n-alkanes derived from the surface waxes of higher plants and phenolic and hydroxyalkanoic compounds from vascular plant as indicators of terrestrial input to the Washington margin.…”

Section: Introductionmentioning

confidence: 96%

Lipid biomarkers and organic matter carbon isotopes in estuarine sediments as proxies for evaluating seawater intrusion

Gong

Zhang

2015

Estuarine, Coastal and Shelf Science

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“…All these are derived from natural biogenic, geologic and industrial sources [7], [8], [9]. Lipid classes have been used as molecular tracers to understand the origin and reactivity of organic matter in marine ecosystem [10]. Predominant lipid classes may reflect the nature of source organisms and the conditions in the immediate environment such as limiting nutrient supply.…”

Section: Introductionmentioning

confidence: 99%

Forensic Analysis and Source Partitioning of Aliphatic Hydrocarbon Contaminants in Surface Sediments from the Niger Delta, Nigeria

Fubara¹

2014

IJEMA

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Forensic analyses and source partitioning modeling were used in characterizing aliphatic hydrocarbon contaminant compositions in surface sediments from coastal areas of the Niger Delta region of Nigeria. The Total Organic carbon (TOC) contents for the sediments ranged from 0.44 to 4.26% (mean 2.36 ± 1.03). The concentrations of total aliphatic hydrocarbon in the entire study area ranged from 1.65 to 61.34mg/kg dry weight, with overall average of 21.52 ± 22.00. The mean concentrations of aliphatic hydrocarbon (C 16 -C 31 ) for the sediments in the upper, middle and lower zones of the study area were in the ranges of 0.04 -5.44mg/kg, 0.04 -4.91mg/kg and 0.11 -10.31mg/kg, respectively. CPI values in the broad range of 0.31 -13.32 for the entire stations is indicative of mixed hydrocarbon inputs. A predominance of odd/even carbon n-alkanes and UCM with different shapes and ranges were observed and suggest inputs from multiple sources. Source partitioning modeling using Factor analyses reduced the data set into three principal components (PCs) confirming inputs from biogenic, anthropogenic and microbial/bacterial sources.

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Biomarkers in surface sediments from the Cross River and estuary system, SE Nigeria: Assessment of organic matter sources of natural and anthropogenic origins

Cited by 52 publications

References 56 publications

Characterizing organic matter inputs to sediments of small, intermittent, prairie streams: a molecular marker and stable isotope approach

Characterizing organic matter inputs to sediments of small, intermittent, prairie streams: a molecular marker and stable isotope approach

Lipid biomarkers and organic matter carbon isotopes in estuarine sediments as proxies for evaluating seawater intrusion

Forensic Analysis and Source Partitioning of Aliphatic Hydrocarbon Contaminants in Surface Sediments from the Niger Delta, Nigeria

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