Effects of river inputs on particulate organic matter composition and distributions in surface waters and sediments of the Mersin Bay, Northeastern Mediterranean Sea

Akçay, İsmail; Tuğrul, Süleyman; Özhan, Koray

doi:10.1016/j.rsma.2022.102316

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…Maximum groundwater nitrate concentrations were consistently measured in between Tarsus and Karaduvar regions in 2020 (Table 3). Intensive irrigation in agriculture, rapid urbanization and the terrestrial inputs from the domestic wastewater and industrial discharges have led to nitrate pollution in surface waters and groundwater in Mersin Province (Özbay et al, 2012;Akçay et al, 2022;Akçay, 2023;Akçay et al, 2023;Erşahin & Bilgili, 2023;Türkeri et al, 2023). Study findings indicated that highest concentrations were consistently measured in the regions where human-induced pressures are very intense (Güler et al, 2012;Erşahin & Bilgili, 2023).…”

Section: Resultsmentioning

confidence: 99%

Potential Health Risk Assessment for Nitrate Contamination in the Groundwater of Mersin Province, Türkiye

Özbay

2024

Journal of Agricultural Production

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Though groundwater is one of the most significant natural water sources, its quality is deteriorating due to the anthropogenic pressures that poses health risks for people. In this study, potential health risk assessment for nitrate pollution in groundwater of Mersin Province was determined by commonly using health indices. Study findings indicated that the calculated Hazard Index (HI) values varied between 0.001 and 17.89 for the adults whilst the HI values ranging from 0.001 to 29.87 for the children. The HI values in the groundwater of Erdemli, Göksu and Anamur regions showed low chronic health risk for the adults and children (HI≤1). However, the calculated health risk indices indicated significant health hazards for the children inhabited between Tarsus and Çeşmeli regions (HI≥4.00) due to severe nitrate contamination originated from terrestrial sources. The findings of this study performed in the Mersin Province showed the sustainable management of groundwater policies is needed to reduce nitrate contamination and potential health hazards of the groundwater of studied and other regions in Türkiye.

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Section: Resultsmentioning

confidence: 99%

Potential Health Risk Assessment for Nitrate Contamination in the Groundwater of Mersin Province, Türkiye

Özbay

2024

Journal of Agricultural Production

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“…The study findings with the previously reported riverine nutrients data showed that nutrient concentrations and fluxes of the Seyhan and Ceyhan Rivers were greater than recorded in the other regional rivers flowing into the NE Mediterranean coastal region as these rivers pass through highly populated urban areas hosting local industrial and domestic wastewater treatment facilities that discharge to these rivers (Kılıç et al 2018). Higher concentrations of nutrients carried by the regional rivers have led to development of coastal eutrophication in the NE Mediterranean coastal waters (Tugrul et al 2019, Akcay et al 2022) (Figure 2). The calculated molar ratios from total nitrogen (TN) and phosphorus (TP) fluxes ranged from 13 in the Göksu River to 22 in the Berdan River (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Nutrient inputs from two major rivers into the cilician basin of the north-eastern Mediterranean Sea

Türkeri,

Marankoz,

Özbay

et al. 2023

OandHS

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In this study, dissolved nutrients concentrations were measured monthly at downstream points of the two regional rivers (the Berdan and Göksu rivers) flowing into the Cilician Basin of the North-eastern (NE) Mediterranean Sea.The dissolved nutrients data obtained between September 2021 and August 2022 were used to determine riverine nutrient fluxes. This study showed that spatial and temporal variations were recorded in nutrients concentrations of the two regional rivers with the maximum values consistently recorded in the Berdan River having lower volume fluxes.The annual nutrient inputs of the two regional rivers indicated that higher amounts of dissolved nutrients were carried by the Göksu River due to its higher volume fluxrate. The calculated molar ratios from total nitrogen (TN)and phosphorus (TP) fluxes ranged from 13 in the Göksu River to 22 in the Berdan River. The higher TN/TP molar ratio compared to the classic Redfield Ratio of N/P in the Berdan River is very likely to modify nutrient dynamics leading to further eutrophication in the shelf waters of the NE Mediterranean Sea.

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“…However, the behavior of OM in estuaries and coastal bays is complicated due to the OM is supplied from multiple sources, including terrestrial plant detritus, soils, in-situ aquatic production and exogenous offshore marine environments sources (Ke et al, 2020;Samantaray and Sanyal, 2022;Akcay et al, 2022). Moreover, due to the complex hydrological conditions in the estuaries and bays, the OM dynamics in estuaries and bays are subject to high spatial and temporal variability (Liu et al, 2020a;Chen et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Interactions between particulate organic matter and dissolved organic matter in a weak dynamic bay revealed by stable isotopes and optical properties

Lü

Wang²,

Lao³

et al. 2023

Front. Mar. Sci.

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Few studies have incorporated the tools of stable isotopes and optical properties to study the biogeochemical process of organic matter (OM), including particulate organic matter (POM) and dissolved organic matter (DOM), which prevents our comprehension of the interactions between POM and DOM in the marine environment. In this study, the origin, distribution, and fate of POM and DOM in Tieshangang Bay, a weak dynamic bay were investigated by measuring δ13C and δ15N of POM, dissolved organic carbon (DOC), and absorption and fluorescence of DOM (CDOM and FDOM). In the upper bay, POM source was mainly originated from terrestrial discharge, whereas the high fluorescence index (FI) indicated that external aquatic organism activity dominated DOM sources. In contrast, in the outer bay, the slightly increased δ13C and enriched δ15N of POM and enhanced fluorescence intensities of protein-like DOM components indicated the considerable contributions of the in situ biological activities to OM. A net addition of DOC and optical components of DOM occurred in both the upper and outer bays. The decomposition of terrestrial POM was responsible for the addition of DOM due to the weak dynamics in the upper bay, whereas the enhanced primary production and the strong decomposition of freshly produced POM jointly contributed to the addition of DOM in the outer bay. Our study suggests that hydrodynamics regulate the biogeochemistry and interactions of POM and DOM in the weak dynamic bay.

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Effects of river inputs on particulate organic matter composition and distributions in surface waters and sediments of the Mersin Bay, Northeastern Mediterranean Sea

Cited by 10 publications

References 38 publications

Potential Health Risk Assessment for Nitrate Contamination in the Groundwater of Mersin Province, Türkiye

Potential Health Risk Assessment for Nitrate Contamination in the Groundwater of Mersin Province, Türkiye

Nutrient inputs from two major rivers into the cilician basin of the north-eastern Mediterranean Sea

Interactions between particulate organic matter and dissolved organic matter in a weak dynamic bay revealed by stable isotopes and optical properties

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