Atmospheric Nitrogen Deposition Associated with the Eutrophication of Taihu Lake

Chen, Xi; Wang, Yanhua; Ye, Chun; Zhou, Wei; Cai, Zucong; Xiao, Han

doi:10.1155/2018/4017107

Cited by 24 publications

(14 citation statements)

References 27 publications

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“…Atmospheric precipitation is an important source of nutrients for freshwater ecosystems (Russell et al, 1998;Zhai et al, 2009;Chen et al, 2018), especially when the water masses are limited by poor mobility and mixing; thus, they are sensitive to atmospheric nutrient inputs (Zheng et al, 2019). The fluctuations in abundance of microalgae and dinoflagellates in Lake Baikal, which were especially significant in April 2018 (Fig.…”

Section: Atmospheric Recipitation As An Important Source Of Nutrientsmentioning

confidence: 99%

The role of atmospheric precipitation in the under-ice blooming of endemic dinoflagellate Gymnodinium baicalense var. minor Antipova in Lake Baikal

Оболкин

Volkova

Ohira

et al. 2019

LFWB

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The mass development of the phototrophic under-ice community is an interesting phenomenon known for the Arctic Ocean as well as for some rivers and freshwater lakes, including Lake Baikal. Species composition and productive characteristics of the under-ice phytoplankton in Lake Baikal are well studied. During the under-ice blooming, an endemic dinoflagellate Gymnodinium baicalense var. minor Antipova can have more than half of the annual primary phytoplankton production. However, there are still many questions to be answered regarding the factors limiting abundance and proliferation of the under-ice phytoplankton as well as mechanisms facilitating it to persist in Lake Baikal under conditions of the low salinity and low temperature. In present work, we studied the development dynamics of dinoflagellates and microalgae under the ice cover in Listvennichny Bay of Lake Baikal from February to April 2018. Simultaneously, the dynamics of the chemical composition and concentration of atmospheric precipitation were analysed. We observed the under-ice community with the domination of endemic dinoflagellate Gymnodinium baicalense var. minor in April. The biomass of this species considerably varied on different days from 0.04 to 10.0 x 10 3 mg/m 3. The results of this study indicated that nutrient supply from precipitation could be an important source of nutrition for organisms developing under the ice, in particular, Gymnodinium baicalense var. minor, and could be one of the factors causing the fluctuations in its biomass. We suggested that abrupt significant increases in abundance of G. baicalense var. minor could be a result of their active migration to the area with elevated concentration of nitrogen from atmospheric precipitation. Such an ability may help this species to prosper under the ice of Lake Baikal.

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Section: Atmospheric Recipitation As An Important Source Of Nutrientsmentioning

confidence: 99%

The role of atmospheric precipitation in the under-ice blooming of endemic dinoflagellate Gymnodinium baicalense var. minor Antipova in Lake Baikal

Оболкин

Volkova

Ohira

et al. 2019

LFWB

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“…) areas, eutrophication of waterways (Chen et al . ), and elevated emissions of climate‐forcing greenhouse gases (Xie et al . ), which also impair air quality (Mushinski et al .…”

mentioning

confidence: 99%

Hotspots of nitrogen deposition in the world's urban areas: a global data synthesis

Decina

Hutyra

Templer

2019

Frontiers in Ecol & Environ

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Human activities have altered the global nitrogen (N) cycle, elevating rates of atmospheric N deposition up to tenfold above pre‐industrial levels, with consequences for ecosystem function and human health. To date, most N deposition studies have been carried out in rural areas; however, there has been a recent surge of N deposition studies conducted in urban ecosystems due to the increased recognition that humans are greatly altering the N cycle in these environments. We synthesized data from 174 publications over a period of 40 years that examined rates of N deposition in urban and nearby rural areas worldwide. Results of this meta‐analysis help to quantify urban N deposition, demonstrate that total N deposition in cities is predominately composed of chemically reduced – as opposed to oxidized – forms of N like ammonia, and identify regional hotspots of urban N deposition, particularly in China. These findings highlight the need to examine and address the N cycle in cities as the world continues to urbanize.

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“…Due to established limnological paradigms, management of P is often seen as the most effective strategy in controlling water quality issues stemming from excess phytoplankton growth. However, recent evidence suggests N deposition from avariety of sources can lead to eutrophication issues and reductions in ecosystem services provided by lakes (Bergström et al 2005; Bergström and Jansson 2006; Chen et al 2018). Our results add to the growing body of literature identifying strong relationships between N loads and productivity, suggesting lake metabolic rates scale with N availability (Bogard et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Highest primary production achieved at high nitrogen levels despite strong stoichiometric imbalances with phosphorus in hypereutrophic experimental systems

Kelly

Taylor

Andersen

et al. 2021

Limnology & Oceanography

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Lakes in human‐dominated landscapes often face high loads of nutrients that may alter ecosystem function. High N loads relative to P are especially common in agricultural watersheds, where nitrate (NO3) in particular is elevated due to fertilizer application and runoff. While past research has focused extensively on the impact of nutrient loads on reductions in water quality, we still lack assessment of the impact of high N loading and extreme stoichiometric imbalance on ecosystem process rates, specifically measurements of gross primary production (GPP), ecosystem respiration (ER), and net ecosystem productivity (NEP). We used open‐bottomed experimental mesocosms (limnocorrals) to establish four treatments of increasing N : P by increasing N loads while leaving P loads consistent, and measured chlorophyll concentration and metabolic rates. We observed significant differences in productivity among treatments, with higher biomass and GPP in the highest two N : P treatments and a unimodal pattern between GPP and N concentrations. Declines in GPP at high N may have been due to limitation by P or light. In contrast to other studies, we did not observe any significant differences in ER with fertilization, potentially from a lack of dissolved organic carbon loading often associated with higher nutrient concentrations in those lakes. Maximum GPP and NEP observed here was far above commonly cited thresholds for likely P limitation at a molar N : P of approximately 330. Our results highlight the potential for high productivity despite stoichiometric imbalance that is common in agricultural systems, suggesting N management may be important in reducing primary production in hypereutrophic lakes.

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Atmospheric Nitrogen Deposition Associated with the Eutrophication of Taihu Lake

Cited by 24 publications

References 27 publications

The role of atmospheric precipitation in the under-ice blooming of endemic dinoflagellate Gymnodinium baicalense var. minor Antipova in Lake Baikal

The role of atmospheric precipitation in the under-ice blooming of endemic dinoflagellate Gymnodinium baicalense var. minor Antipova in Lake Baikal

Hotspots of nitrogen deposition in the world's urban areas: a global data synthesis

Highest primary production achieved at high nitrogen levels despite strong stoichiometric imbalances with phosphorus in hypereutrophic experimental systems

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