High stability of autochthonous dissolved organic matter in karst aquatic ecosystems: Evidence from fluorescence

Xia, F.; Liu, Zaihua; Zhao, Min; Li, Qiang; Liu, Dong; Cao, Wenfang; Zeng, Chaoliu; Hu, Yundi; Chen, Bin; Bao, Qing; Zhang, Yi; He, Qing; Lai, Chaowei; He, Xuejun; Ma, Zhen; Han, Yongqiang; He, Haibo

doi:10.1016/j.watres.2022.118723

Cited by 32 publications

(18 citation statements)

References 90 publications

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“…DO and nitrogen availability (e.g., TN and NO 3 – ) were responsible for N 2 O production, as found in previous studies. , The GDP per capita elicited a dominant promoting effect on N 2 O production ( p < 0.05), which might have been due to an increased input of nitrogen-containing wastewater by anthropogenic disturbances as GDP increased. N 2 O production was positively influenced by the FI, a spectral indicator of the origin of DOM . The microbial degradation of DOM also provided electrons for denitrification by reducing the O 2 content , and regulated the production of N 2 O.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Specifically, urban development and agricultural practices can influence DOM bioavailability and biodiversity of rivers by increasing the N and P levels in adjacent riverine systems. , Furthermore, mineral weathering is accelerated by agricultural activities and then affects the fate of microbes and DOM by regulating microbial activity as well as OM bioavailability in aquatic environments. − Heterotrophic decomposition is the primary mechanism by which terrestrially derived OM is assimilated into aquatic ecosystems. , A higher proportion of bioavailable DOM results in greater bacterial growth efficiency and an increase in carbon emitted to the atmosphere . Great efforts have been made to investigate the complexity of DOM and its consumption by microbial communities, , as well as the coupling between DOM composition and GHGs in aquatic environments. , However, the linkages among DOM bioavailability, microbial metabolism, and GHGs have been poorly investigated on a large scale in rivers.…”

Section: Introductionmentioning

confidence: 99%

“…22,23 A higher proportion of bioavailable DOM results in greater bacterial growth efficiency and an increase in carbon emitted to the atmosphere. 24 Great efforts have been made to investigate the complexity of DOM and its consumption by microbial communities, 23,25 as well as the coupling between DOM composition and GHGs in aquatic environments. 26,27 How-ever, the linkages among DOM bioavailability, microbial metabolism, and GHGs have been poorly investigated on a large scale in rivers.…”

Section: ■ Introductionmentioning

confidence: 99%

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DOM Associates with Greenhouse Gas Emissions in Chinese Rivers under Diverse Land Uses

Kang,

Hu,

Feng

et al. 2023

Environ. Sci. Technol.

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Growing evidence indicates that rivers are hotspots of greenhouse gas (GHG) emissions and play multiple roles in the global carbon budget. However, the roles of terrestrial carbon from land use in river GHG emissions remain largely unknown. We studied the microbial composition, dissolved organic matter (DOM) properties, and GHG emission responses to different landcovers in rivers (n = 100). The bacterial community was mainly constrained by land-use intensity, whereas the fungal community was mainly controlled by DOM chemical composition (e.g., terrestrial DOM with high photoreactivity). Anthropogenic stressors (e.g., land-use intensity, gross regional domestic product, and total population) were the main factors affecting chromophoric DOM (CDOM). DOM biodegradability exhibited a positive correlation with CDOM and contributed to microbial activity for DOM transformation. Variations in CO 2 and CH 4 emissions were governed by the biodegradation or photomineralization of dissolved organic carbon derived from autotrophic DOM and were indirectly affected by land use via changes in DOM properties and water chemistry. Because the GHG emissions of rivers offset some of the climatic benefits of terrestrial carbon (or ocean) sinks, intensified urban land use inevitably alters carbon cycling and changes the regional microclimate.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DOM Associates with Greenhouse Gas Emissions in Chinese Rivers under Diverse Land Uses

Kang,

Hu,

Feng

et al. 2023

Environ. Sci. Technol.

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“…To ensure the health and safety of underground workers and safe production, the ventilation rate must meet the relevant requirements, resulting in a huge amount of gas being directly discharged into the air. However, under the existing technical conditions, effectively using such low-concentration ventilation gas is difficult (Figure 4) [22][23][24][25][26][27][28].…”

Section: Methane Emitted From Coal Mines and Its Characteristicsmentioning

confidence: 99%

A Habitable Earth and Carbon Neutrality: Mission and Challenges Facing Resources and the Environment in China—An Overview

Zhang

Yan

et al. 2023

IJERPH

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Since the Industrial Revolution, the impacts of human activities have changed the global climate system, and climate warming has had rapid and widespread effects on the planet. At present, the world is experiencing a series of natural disasters, such as climate change, environmental pollution, biodiversity loss, and sea level rise, which pose a serious threat to the livability of the Earth. An international consensus has been reached that achieving carbon neutrality is the key to tackling climate change; it is also crucial to building a livable planet. To achieve carbon neutrality, energy is the main aspect, for which technology regarding resources and the environment is essential. In this context, we collected data, performed an in-depth analysis of the basic and structural characteristics of the development of the coal industry and environmental remediation, studied and judged the trends in regional economic development and demand growth, and closely examined the requirements of China’s development strategy, which focuses on the ideas of carbon peak and carbon neutralization in line with local development trends and economic system characteristics. We must build a livable Earth, promote the green and low-carbon transformation of regional energy, promote high-quality economic development, and ensure the safe supply of energy.

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“…Generally, the soil carbon sink capacity of different ecosystems from large to small is forest > grassland > wetland > farmland > unused land and construction land. When human activities cause land use/land cover change (LUCC), on the one hand, this directly changes the ecosystem type, thereby affecting the net primary productivity of the ecosystem and the input of soil organic carbon; on the other hand, this indirectly changes the biological, physical and chemical properties of the soil, thereby affecting the soil respiration and the intensity of soil carbon output( Figure 4 ) [ 19 , 20 , 21 , 22 ].…”

Section: Literature Review Of Soil Carbon Sequestrationmentioning

confidence: 99%

Exploration of the Implementation of Carbon Neutralization in the Field of Natural Resources under the Background of Sustainable Development—An Overview

Zhang

Yang

et al. 2022

IJERPH

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On 15 March 2021, Chinese President Xi Jinping pointed out that “achieving carbon peak and carbon neutrality is a broad and profound economic and social systemic change” and called for “putting energy and resources conservation in the first place”. Natural resources are the material basis, space carrier and energy source of high-quality development. The source of carbon emissions is resource utilization, and carbon reduction and removal also depend on resources. The improvement of carbon sink capacity is inseparable from natural resources. To achieve the goal of “double carbon”, it is necessary to consolidate the carbon sink capacity of the ecosystem, as well as enhancing its carbon sink increment. Among natural resources, forest carbon sinks, soil carbon sinks and karst carbon sinks have significant emission reduction potential and cost advantages, representing important means to deal with climate change. This paper reviews the relevant research results at home and abroad, summarizes the carbon sink estimation, carbon sink potential, carbon sink influencing factors, ecological compensation mechanism and other aspects, analyzes the path selection of establishing carbon sink green development, and puts forward corresponding policies and suggestions, providing a theoretical reference for the achievement of the carbon neutrality goal in the field of natural resources in China.

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High stability of autochthonous dissolved organic matter in karst aquatic ecosystems: Evidence from fluorescence

Cited by 32 publications

References 90 publications

DOM Associates with Greenhouse Gas Emissions in Chinese Rivers under Diverse Land Uses

DOM Associates with Greenhouse Gas Emissions in Chinese Rivers under Diverse Land Uses

A Habitable Earth and Carbon Neutrality: Mission and Challenges Facing Resources and the Environment in China—An Overview

Exploration of the Implementation of Carbon Neutralization in the Field of Natural Resources under the Background of Sustainable Development—An Overview

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