Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity

Zhang, Daoyong; Lin, Qinghua; Xue, Nana; Zhu, Pengfeng; Zhang, Fan; Ge, Chunhua; Ma, Chaojie; Pan, Xiangliang

doi:10.1016/j.scitotenv.2019.01.370

Cited by 14 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, in different seasons and different parts of the bay, according to calculations, the oxygen concentration should be 20-50% lower than before the start of the salinity increase. An increase in salinity, as well as changes in other physical and chemical parameters, shift the geochemical background of the lagoon ecosystem, including the solubility of various salts, as well as direction and character of some reactions [35][36][37][38]. All this may often increase the concentration of toxic substances adding more extremality to the environment.…”

Section: Discussionmentioning

confidence: 99%

Human-Induced Sharp Salinity Changes in the World’s Largest Hypersaline Lagoon Bay Sivash (Crimea) and Their Effects on the Ecosystem

Anufriieva

Колесникова

Revkova

et al. 2022

Water

View full text Add to dashboard Cite

Lakes and lagoons play an important role worldwide, and salinity fluctuations significantly affect their ecosystems. Bay Sivash, the world’s largest hypersaline water body, underwent a sharp change in salinity, induced by the closing of the North Crimean Canal. To monitor a shift in the ecosystem, a study was carried out from 2014 to 2020 at 15 sites of the lagoon. Since the closure of the canal, the average salinity increased from 22 g L−1 (2013) to 94 g L−1 (2020). Suspended solids and dissolved organic matter also increased. When salinity increased above 50 g L−1, the number of taxa significantly decreased; this was a negative linear relation. The increase in salinity significantly changed the structure of zooplankton and benthos. The most dramatic changes occurred with the salinity increase from 25 to 70 g L−1. Chironomidae larvae numbers began to increase greatly in the ecosystem of the bay, and since 2014, they have rapidly increased their contribution to the abundance of benthos and plankton. The concentration of benthic–planktonic species increased in plankton, in particular, in Harpacticoida and Chironomidae. At salinity above 80–90 g L−1, nauplii and adult brine shrimp appeared to become abundant in plankton and benthos. The transit of the ecosystem to a new alternative state occurred.

show abstract

Section: Discussionmentioning

confidence: 99%

Human-Induced Sharp Salinity Changes in the World’s Largest Hypersaline Lagoon Bay Sivash (Crimea) and Their Effects on the Ecosystem

Anufriieva

Колесникова

Revkova

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…37 It should be noted that the salinity may more or less affect the spectroscopic characteristics of DOM, such as fluorescence intensity. 38 Therefore, we analyzed the variations in spectroscopic characteristics of DOM in brackish lakes before and after adding salts (2.4 g NaCl, the dominating cation in saline lakes) into brackish lake samples (30 mL) to match the salinity of brine lakes. The preliminary results showed that the effects of salinity on most spectroscopic characteristics were lower than 10% (Figure S1).…”

Section: Site Description and Field Water Samplingmentioning

confidence: 99%

Dissolved Organic Matter Characteristics and Composition of Saline Lakes in the Badain Jaran Desert, China

Zhang,

Wang,

Zhang

et al. 2023

ACS Earth Space Chem.

View full text Add to dashboard Cite

Elucidating the characteristics and molecular composition of dissolved organic matter (DOM) is critical to understanding carbon cycling in increasingly saline lakes in arid and hyperarid areas; however, the molecular signatures of DOM in these widely distributed saline lakes remain poorly understood. Here, variations in DOM characteristics and ages with salinity were investigated across 10 small saline lakes within the Badain Jaran Desert based on absorption and fluorescence spectroscopy, Fourier transform ion cyclotron resonance mass spectrometry, and 14 Cisotopic analysis. The results showed that dissolved organic carbon (DOC) significantly increased with salinity, and the 14 C age of solid-phase extracted DOM ranging 385−3935 years before present did not correlate with salinity across lakes. With increasing salinity, the DOM aromaticity, DOC-specific abundances of fluorescent components, and relative abundance of lignin-like components all decreased, whereas the relative abundance of lipid-like components increased. Regarding halogen-containing DOM, the brine lakes showed higher relative abundances of chlorine-containing lignin-and lipid-like components but comparable relative abundances of bromine-containing components, supporting preferential chlorination over bromination. This study demonstrates the strong impacts of salinization on DOM accumulation and chlorination in inland saline lakes and highlights the critical role of brine lakes as a persistent carbon pool.

show abstract

Photocatalytic degradation of dissolved organic matter in landfill leachate by heterostructural ZnO-rGO composite catalysts

Lin

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity

Cited by 14 publications

References 31 publications

Human-Induced Sharp Salinity Changes in the World’s Largest Hypersaline Lagoon Bay Sivash (Crimea) and Their Effects on the Ecosystem

Human-Induced Sharp Salinity Changes in the World’s Largest Hypersaline Lagoon Bay Sivash (Crimea) and Their Effects on the Ecosystem

Dissolved Organic Matter Characteristics and Composition of Saline Lakes in the Badain Jaran Desert, China

Photocatalytic degradation of dissolved organic matter in landfill leachate by heterostructural ZnO-rGO composite catalysts

Contact Info

Product

Resources

About