Environmental significance of atmospheric nitrogen deposition in the transition zone between the Tibetan Plateau and arid region

Zhang, Baijuan; Li, Zongxing; Qi, Feng; Juan, Gui; Zhao, Yue; Baiting, Zhang

doi:10.1016/j.chemosphere.2022.136096

Cited by 3 publications

(4 citation statements)

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“…Atmospheric nitrogen (N) deposition is an important component of the global N cycle and a key source of biologically available N, and it contributes substantially to the nutrient pool of an ecosystem . Its impact on the ecological environment has attracted extensive attention from scholars worldwide . However, in aquatic ecosystems, atmospheric N deposition is often overlooked since it is normally believed that it contributes less to lake N input than does runoff, and lake primary production is limited by phosphorus (P), rather than N .…”

Section: Introductionmentioning

confidence: 99%

“…1 Its impact on the ecological environment has attracted extensive attention from scholars worldwide. 2 However, in aquatic ecosystems, atmospheric N deposition is often overlooked since it is normally believed that it contributes less to lake N input than does runoff, and lake primary production is limited by phosphorus (P), rather than N. 3 Recent studies of alpine lakes with less anthropogenic influence in the United States found that atmospheric deposition is a significant source of N for these lakes. 4−6 In some lakes, atmospheric deposition may contribute >20% of the total N input, which is higher than that of domestic sewage.…”

Section: Introductionmentioning

confidence: 99%

“…High N deposition that exceeds the natural threshold and resilience can affect the ecosystem, therefore causing a series of adverse impacts, − and it might also affect climate change. , In particular, excessive N loading might lead to eutrophication and cyanobacterial blooms in lakes . Other ecological effects of N loading on lakes include acidification, decreased lake clarity, and phytoplankton community changes caused by increased relative abundances of diatom taxa indicative of moderate nutrient enrichment …”

Section: Introductionmentioning

confidence: 99%

“…Large amounts of N emissions have made Western Europe, China, and North America the three major hotspots for global N deposition . Atmospheric N deposition increased from 31.6 to 195.0 Tg N/yr globally and from 13.2 to 21.0 kg N/(ha yr) in China during the 1980s and 2000s. , To alleviate the negative effects of atmospheric N pollution, many countries have begun to control N emissions.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Reactive Nitrogen Deposition from 2010 to 2021 in Lake Taihu and the Effects on Phytoplankton

Deng

Nie

Huang

et al. 2023

Environ. Sci. Technol.

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The effects of nitrogen deposition reduction on nutrient loading in freshwaters have been widely studied, especially in remote regions. However, understanding of the ecological effects is still rather limited. Herein, we re-estimated nitrogen deposition, both of wet and dry deposition, in Lake Taihu with monthly monitoring data from 2010 to 2021. Our results showed that the atmospheric deposition of reactive nitrogen (namely NH4 + and NO3 –) in Lake Taihu was 4.94–11.49 kton/yr, which equaled 13.9%–27.3% of the riverine loading. Dry deposition of NH4 + and NO3 – contributed 53.1% of the bulk deposition in Lake Taihu. Ammonium was the main component of both wet and dry deposition, which may have been due to the strong agriculture-related activities around Lake Taihu. Nitrogen deposition explained 24.9% of the variation in phytoplankton community succession from 2010 to 2021 and was the highest among all the environmental factors. Atmospheric deposition offset the effects of external nitrogen reduction during the early years and delayed the emergence of nitrogen-fixing cyanobacterial dominance in Lake Taihu. Our results implied that a decrease in nitrogen deposition due to a reduction in fertilizer use, especially a decrease in NH4 + deposition, could limit diatoms and promote non-nitrogen-fixing cyanobacterial dominance, followed by nitrogen-fixing taxa. This result was also applied to other shallow eutrophic lakes around the middle and lower reaches of the Yangtze River, where significant reduction of fertilizer use recorded during the last decades.

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Section: Introductionmentioning

confidence: 99%