Factors Affecting Nutrient Concentration and Stable Carbon and Nitrogen Isotope Ratio of Particulate Organic Matter in the Ishikari River System, Japan

Jha, Pawan Kumar; Minagawa, Masahiro

doi:10.1007/s11270-013-1551-z

Cited by 14 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). Similar studies suggested that discharge from the domestic wastewater treatment plant played a crucial role in affecting nutrients dynamics of stream (Tachibana et al, 2001;Jha and Masao, 2013).…”

mentioning

confidence: 63%

“…Longitudinal variations in the d 15 N characteristics of stream POM can be used to identify N sources in waterways because they provide information on the N source and major biogeochemical processes in aquatic ecosystems (Vander Zanden et al, 2005;Finlay and Kendall, 2007;Ryu et al, 2018;Xuan et al, 2019). So the stable C and N isotopic values and C/N ratios of SPOM have been widely used in aquatic biogeochemistry to identify the sources (terrestrial, freshwater, or marine) and fate of organic matter in aquatic ecosystems based on their unique range of values for different sources (Kendall et al, 2001;Usui et al, 2006;Jha and Masao, 2013).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Longitudinal variation characteristics of stable isotope ratios of suspended particulate organic matter in the headwaters of the Qingjiang River, China

Gao

Zhang

Zhong

et al. 2021

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

To determine the sources and characteristics of suspended particulate organic matter (SPOM), the spatial distribution of carbon and nitrogen and their isotopic values (δ13C and δ15N) were measured from upstreamto downstream (i.e. site 1 to site 4) in the head waters of the Qingjiang River in central China. The mean annual SPOM δ15N and δ13C values varied between sites but exhibited a unimodal pattern. The mean annual δ15N increased from site 1 (2.5‰) to 3 (5.3‰), followed by a major decrease to 2.2‰ at site 4. Furthermore, the mean annual δ13C varied unimodally, being the most positiveat sites 1 (−21.6‰) and 4 (−22.8‰) followed by sites 2 (−24.5‰) and 3 (−26.4‰). In particular, the mean SPOM δ15N and δ13C in the tailwaters from a domestic wastewater treatment plant, which was located approximately 0.3 km upstream of site 4, were 2.2‰ and −25.6‰, respectively. The SPOM C/N values from stream water at site 4 (8.5 ± 1.5) and tailwater (6.2 ± 0.9) were similar. Collectively, the results suggested that wastewater treatment plant tailwater influenced the stable isotope values of SPOM in the stream and affected the variation trendfrom upstream to downstream.

show abstract

mentioning

confidence: 63%

mentioning

confidence: 99%

Longitudinal variation characteristics of stable isotope ratios of suspended particulate organic matter in the headwaters of the Qingjiang River, China

Gao

Zhang

Zhong

et al. 2021

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

show abstract

“…The low C/N ratio indicates that soil OM contribution is high due to erosion during heavy rainy periods, whereas a high C/N ratio in low-rainy periods indicates increasing autochthonous OM derived from benthic and pelagic algae (Kaymak et al, 2015). In contrast, many studies showed that the C/N ratios of POM samples from many freshwater systems increased during the wet season and decreased in the dry season (Jha and Masao, 2013;Mbaye et al, 2016;Liu et al, 2021) and indicated that the sources of OM contributing to POM vary with fluvial hydrology.…”

Section: Seasonal and Spatial Variation Of Riverine Particulate Organ...mentioning

confidence: 99%

Distribution and sources of particulate organic matter from the anthropogenically disturbed Iyidere River to the Black Sea coast

Kaymak

Mutlu

Verep

2023

Front. Environ. Sci.

View full text Add to dashboard Cite

Understanding the biogeochemical processes of particulate organic matter occurring in the river under anthropogenic disturbances and its transport to the coastal system is important for environmental resource management. In this study, we investigated the sources and distribution of particulate organic matter (POM) from the upper reaches of the Iyidere River, Türkiye, to the coastal water of the Black Sea during the fall and spring seasons using the elemental (POC and PON (%), C/N), isotopic (δ13C and δ15N), and Bayesian mixing model (MixSIAR) analysis. The POC (%), PON (%), and C/N of POM varied seasonally, indicating that the composition of POM varied with river hydrology, which varies depending on the climate of the region. Both the mixing model and the isotopic and elemental ratios of POM have revealed that the organic matter sources contributing to the riverine of POM, during the fall season, when the precipitation is severe, exhibited a uniform distribution. Heavy rain increased soil erosion along the high-slope land, and as a result, soil and bacteria were identified as the main contributor of POM along the Iyidere River. The results showed that the organic matter sources contributing to POM in the spring season showed significant spatial variation. Terrestrial vegetation, soil OM, and bacteria were the main contributors of POM depending on sites, and these contributions did not show a regular trend along the river. δ15N of POM had significant spatial variation in both seasons that was likely caused by nitrogen inputs derived from anthropogenic activities along the river. The anthropogenic activities and cascade dams causing variations in the contribution of organic matter to the POM are the likely important driving factors in this river-coastal system.

show abstract

The fluvial flux of particulate organic matter from the UK: the emission factor of soil erosion

Worrall

Burt

Howden

2015

Earth Surf Processes Landf

View full text Add to dashboard Cite

Soil erosion has been identified as a potential global carbon sink since eroded organic matter is replaced at source and eroded material is readily buried. However, this argument has relied on poor estimates of the total fate of in‐transit particulates and could erroneously imply soil erosion could be encouraged to generate carbon stores. These previous estimates have not considered that organic matter can also be released to the atmosphere as a range of greenhouse gases, not only carbon dioxide (CO2), but also the more powerful greenhouse gases methane (CH4) and nitrous oxide (N2O). As soil carbon lost by erosion is only replaced by uptake of CO2, this could represent a considerable imbalance in greenhouse gas warming potential, even if it is not significant in terms of overall carbon flux. This work therefore considers the flux of particulate organic matter through UK rivers with respect to both carbon fluxes and greenhouse gas emissions. The results show that, although emissions to the atmosphere are dominated by CO2, there are also considerable fluxes of CH4 and N2O. The results suggest that soil erosion is a net source of greenhouse gases with median emission factors of 5.5, 4.4 and 0.3 tonnes CO2eq/yr for one tonne of fluvial carbon, gross carbon erosion and gross soil erosion, respectively. This study concludes that gross soil erosion would therefore only be a net sink of both carbon and greenhouse gases if all the following criteria are met: the gross soil erosion rate were very low (<91 tonnes/km2/yr); the eroded carbon were completely replaced by new soil organic matter; and if less than half of the gross erosion made it into the stream network. By establishing the emission factor for soil erosion, it becomes possible to properly account for the benefits of good soil management in minimizing losses of greenhouse gases to the atmosphere as a by‐product of soil erosion. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

Factors Affecting Nutrient Concentration and Stable Carbon and Nitrogen Isotope Ratio of Particulate Organic Matter in the Ishikari River System, Japan

Cited by 14 publications

References 49 publications

Longitudinal variation characteristics of stable isotope ratios of suspended particulate organic matter in the headwaters of the Qingjiang River, China

Longitudinal variation characteristics of stable isotope ratios of suspended particulate organic matter in the headwaters of the Qingjiang River, China

Distribution and sources of particulate organic matter from the anthropogenically disturbed Iyidere River to the Black Sea coast

The fluvial flux of particulate organic matter from the UK: the emission factor of soil erosion

Contact Info

Product

Resources

About