Effects of aquatic phototrophs on seasonal hydrochemical, inorganic, and organic carbon variations in a typical karst basin, Southwest China

Sun, Ping-An; He, Siming; Yuan, Yaqiong; Shi, Yu; Cheng, Zhongqi

doi:10.1007/s11356-019-06374-6

Cited by 14 publications

(2 citation statements)

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“…DO ranged from 1.88 to 9.93 mg/L, and TOC ranged from 1.09 to 30.63 mg/L. Ca 2+ and HCO 3 − were the major cation and anion due to the abundant carbonate rocks in the study area ( Sun et al, 2019 ). For carbonate rock weathering involving only carbonic acid, the equivalent ratio of [Ca 2+ +Mg 2+ ]/[HCO 3 − ] is typically around 1.…”

Section: Resultsmentioning

confidence: 99%

“…The water cycle was rapid in the karst system because of its underground-surface double-layered structure and high hydraulic conductivity ( Torres et al, 2018 ). Due to the uneven distribution of karst aquifer fissures and tubes, rapid discharge, and significant seasonal flow velocity variation, the hydrological processes and hydrochemical characteristics exhibit substantial spatial and temporal variability ( He et al, 2018 ; Sun et al, 2019 , 2021 ). Karst water provided drinking water for about 25% of the global population ( Dodgen et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal variations of microbial community structure, assembly processes, and influencing factors in karst river

Guan

Zhang

et al. 2023

Front. Microbiol.

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The physicochemical properties and microbial communities have significant annual and seasonal changes in karst aquifers. To explore the changes of microbial community and their relationships with environmental factors, water samples were collected from a typical karst river. Microbial communities in winter (Jan-2017 and Jan-2019) were stable with high similarity in spite of the 2 years sampling interval, but the microbial communities in Aug-2017 was different from that in Aug-2018. In four sampling times, there were 275 shared genera, whose average relative abundance ranging from 89.04 to 96.27%. The winter and summer specific genera were mainly from the recharge of tributary site K6 and discharge of waste water treatment plant (K2 and K3), respectively. The deterministic processes had a more significant effect on the microbial community assembly in winter than that in summer, which was affected by environmental pressure from pollution. Furthermore, antibiotics and inorganic nitrogen pollution affected element cycles of nitrogen and sulfur indirectly through microbial ecological modules in karst river, and the denitrification and desulfurization processes were potentially inhibited. These findings contributed to understand the changes and its assembly mechanism of microbial community, as well as the feedback to environment in polluted karst river.

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Section: Resultsmentioning

confidence: 99%