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1. Relative influence of forest and cropland on fluvial transport of soil organic carbon and nitrogen in the Nen River basin, northeastern China

Author:
Wang, Sen; Wang, Xiaoyuan; He, Bin; Yuan, Wenping
Source:
Journal of hydrology 2020 v.582 pp. 124526
ISSN:
0022-1694
Subject:
total dissolved nitrogen,   etc   ; aquatic ecosystems; basins; cropland; dissolved organic carbon; ecological function; forests; hydrology; land cover; land use change; nitrogen; rivers; soil organic carbon; watersheds; China;     Show all 15 Subjects
Abstract:
... Riverine transport of carbon and nitrogen strongly impacts terrestrial and aquatic ecosystem functions but is itself affected by changes in land cover and land use. China’s Nen River basin has experienced widespread conversion from forest to cropland in the past century, making it representative of similar global land use changes. We assessed organic carbon and nitrogen transport in this basin dur ...
DOI:
10.1016/j.jhydrol.2019.124526

2. Water quality, nutrients, and stable isotopic signatures of particulates and vegetation in a mangrove ecosystem exposed to past anthropogenic perturbations

Author:
Valiela, Ivan; Juman, Rahanna; Asmath, Hamish; Hanacek, Daniella; Lloret, Javier; Elmstrom, Elizabeth; Chenoweth, Kelsey; Jack Brookshire, E.N.
Source:
Regional studies in marine science 2020 v.35 pp. 101208
ISSN:
2352-4855
Subject:
total dissolved nitrogen,   etc   ; ammonium; ecosystem management; estuaries; land use; mangrove ecosystems; nitrogen; nitrogen retention; nutrients; oxygen; particulates; pollution load; swamps; tourists; vegetation; water quality; watersheds; Trinidad and Tobago;     Show all 18 Subjects
Abstract:
... Water quality in mangrove estuaries within Caroni Swamp, Trinidad is impaired by a combination of recent increases in nitrogen loads and lingering effects of a series of reclamation efforts that reduced tidal exchanges and fostered low oxygen and high ammonium concentrations, conditions that are relatively unusual for estuaries. Concentrations of available nitrogen diminish down-estuary, with an o ...
DOI:
10.1016/j.rsma.2020.101208

3. Organic and inorganic nitrogen deposition on the red pine forests at the northern foot of Mt. Fuji, Japan

Author:
Matsumoto, Kiyoshi; Ogawa, Takuya; Ishikawa, Manami; Hirai, Aki; Watanabe, Yuuya; Nakano, Takashi
Source:
Atmospheric environment 2020 v.237 pp. 117676
ISSN:
1352-2310
Subject:
total dissolved nitrogen,   etc   ; Pinus; aerosols; ammonium nitrogen; atmospheric chemistry; bioavailability; coniferous forests; dry deposition; forest canopy; forest ecosystems; forest litter; gases; leaching; models; nitrate nitrogen; nitrite nitrogen; nitrogen compounds; organic nitrogen; rain; stemflow; throughfall; trees; water solubility; wet deposition; Japan;     Show all 25 Subjects
Abstract:
... In order to clarify the deposition amounts and processes of bioavailable nitrogen species including organic forms on forests, a simultaneous observation of rainfall, throughfall, stemflow, aerosols, and their precursor gases was conducted for a two-year period at a forested site on the northern foot of Mt. Fuji in Japan. About 80–90% of the rainfall waters reached the forest floor via the throughf ...
DOI:
10.1016/j.atmosenv.2020.117676

4. Combined Cultivation Pattern Reduces Soil Erosion and Nutrient Loss from Sloping Farmland on Red Soil in Southwestern China

Author:
Mao, Yan-Ting; Hu, Wei; Chau, Henry Wai; Lei, Bao-Kun; Di, Hong-Jie; Chen, An-Qiang; Hou, Mei-Ting; Whitley, Samuel
Source:
Agronomy 2020 v.10 no.8
ISSN:
2073-4395
Subject:
total dissolved nitrogen,   etc   ; Nicotiana tabacum; agricultural land; ammonium nitrogen; cash crops; eutrophication; fertilizer application; field experimentation; land degradation; mountains; nitrate nitrogen; nitrogen; phosphorus; rain; runoff; sediment transport; sediments; soil erosion; soil pH; topographic slope; total dissolved phosphorus; China;     Show all 22 Subjects
Abstract:
... Crops are usually planted on sloping land in mountainous areas due to limited suitable land area. This results in serious soil erosion and loss of nitrogen (N) and phosphorus (P) to land degradation and water eutrophication. It is important to adopt appropriate cultivation practices to change this situation. However, few long-term in situ measurements are available to assess the magnitude of effec ...
DOI:
10.3390/agronomy10081071

5. Characterization, sources and transport of dissolved organic carbon and nitrogen from a glacier in the Central Asia

Author:
Gao, Tanguang; Kang, Shichang; Zhang, Yulan; Sprenger, Michael; Wang, Feiteng; Du, Wentao; Wang, Xiaoming; Wang, Xiaoxiang
Source:
The Science of the total environment 2020 v.725 pp. 138346
ISSN:
0048-9697
Subject:
total dissolved nitrogen,   etc   ; bioavailability; biomass burning; carbon nitrogen ratio; dissolved organic carbon; dust; glaciers; hydrologic cycle; melting; nitrogen; radiative forcing; snow; snowmelt; water stress; Central Asia; China; Polar Regions;     Show all 17 Subjects
Abstract:
... Glacier melting represents an important flux of carbon and nitrogen (N) and affects the hydrological cycle. In this study, we presented the features of dissolved organic carbon (DOC) and N concentrations, their potential sources and export from the Muz Taw glacier in Central Asia. The average DOC and total dissolved nitrogen concentrations were 1.12 ± 1.66 and 0.62 ± 0.59 mg L⁻¹ in surface snow an ...
DOI:
10.1016/j.scitotenv.2020.138346

6. Fluorescent compounds retained by ultrafiltration membranes for water reuse

Author:
Alexandra Sanchez, Anita; Mladenov, Natalie; Wasswa, Joseph
Source:
Journal of membrane science 2020 v.600 pp. 117867
ISSN:
0376-7388
Subject:
total dissolved nitrogen,   etc   ; artificial membranes; biodegradability; biofilm; cleaning; dissolved organic carbon; energy; factor analysis; filters; fluorescence; fluorescence emission spectroscopy; fluorescent substances; fouling; microorganisms; models; molecular weight; organic compounds; porosity; total suspended solids; ultrafiltration; wastewater; water reuse; water treatment;     Show all 23 Subjects
Abstract:
... Ultrafiltration (UF) membranes are increasingly being applied in water treatment and reuse processes because they provide effective removal of microorganisms, suspended solids, and high molecular weight compounds. However, membrane fouling necessitates backwashing and periodic chemical cleaning and, as a result, causes an increase in the amount of energy and overall cost for operation. Dissolved o ...
DOI:
10.1016/j.memsci.2020.117867

7. Hydrological fluxes of dissolved organic carbon and total dissolved nitrogen in subtropical forests at three restoration stages in southern China

Author:
You, Yuyu; Xiang, Wenhua; Ouyang, Shuai; Zhao, Zhonghui; Chen, Liang; Zeng, Yelin; Lei, Pifeng; Deng, Xiangwen; Wang, Jiurong; Wang, Keling
Source:
Journal of hydrology 2020 v.583 pp. 124656
ISSN:
0022-1694
Subject:
total dissolved nitrogen,   etc   ; Lithocarpus; Pinus massoniana; Quercus; absorption; biogeochemical cycles; coniferous forests; deciduous forests; dissolved organic carbon; forest restoration; leaching; plant litter; rain; runoff; secondary forests; soil organic matter; stemflow; throughfall; trees; tropical forests; China;     Show all 21 Subjects
Abstract:
... In the restoration of subtropical forests, the hydrological fluxes of dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) have not been fully investigated in different stages dominated by different tree species. The concentrations of DOC and TDN in rainfall, throughfall, stemflow, and surface runoff were measured for two years in each of the three forests at different restoration sta ...
DOI:
10.1016/j.jhydrol.2020.124656

8. Large contribution of non-aquaculture period fluxes to the annual N2O emissions from aquaculture ponds in Southeast China

Author:
Yang, Ping; Yang, Hong; Lai, Derrick Y.F.; Guo, Qianqian; Zhang, Yifei; Tong, Chuan; Xu, Chaobin; Li, Xiaofei
Source:
Journal of hydrology 2020 v.582 pp. 124550
ISSN:
0022-1694
Subject:
total dissolved nitrogen,   etc   ; ammonium nitrogen; aquaculture systems; biogeochemical cycles; carbon dioxide; denitrifying bacteria; estuaries; global warming potential; greenhouse gas emissions; greenhouse gases; hydrology; mariculture; nitrous oxide; ponds; rivers; shrimp; shrimp culture; temporal variation; uncertainty; China;     Show all 20 Subjects
Abstract:
... Nitrous oxide (N₂O) is one of major potent long-lived atmospheric greenhouse gases (GHGs) with a global warming potential of approximately 300 times that of carbon dioxide (CO₂) over a 100-year timespan. To date, only several studies have explored the contribution of N₂O emission from aquaculture systems to global emission, but with large uncertainty. In this study, the spatiotemporal distribution ...
DOI:
10.1016/j.jhydrol.2020.124550

9. Seasonal performance of stormwater biofiltration system under tropical conditions

Author:
Hermawan, Andreas Aditya; Talei, Amin; Salamatinia, Babak; Chua, Lloyd H.C.
Source:
Ecological engineering 2020 v.143 pp. 105676
ISSN:
0925-8574
Subject:
total dissolved nitrogen,   etc   ; Cordyline fruticosa; Cyperus alternifolius; biofiltration; developing countries; drying; heavy metals; plants (botany); pollutants; pollution; rain intensity; stormwater; stormwater management; total dissolved phosphorus; tropics; urban runoff; urbanization; water quality standards; water table; weather; wet-dry cycles; Malaysia;     Show all 22 Subjects
Abstract:
... Urbanization rates are increasing in developing countries such as Malaysia. In the tropics, flooding is a major concern, due to high rainfall intensities. In addition to flooding, pollution caused by contaminants contained in urban runoff are also of concern. Biofiltration system as one of the technologies in on-site stormwater treatment, has gained its popularity as part of Water Sensitive Urban ...
DOI:
10.1016/j.ecoleng.2019.105676

10. Optimization method for Microcystis bloom mitigation by hydrogen peroxide and its stimulative effects on growth of chlorophytes

Author:
Wang, Binliang; Song, Qingyang; Long, Jijian; Song, Gaofei; Mi, Wujuan; Bi, Yonghong
Source:
Chemosphere 2019 v.228 pp. 503-512
ISSN:
0045-6535
Subject:
total dissolved nitrogen,   etc   ; Chlamydomonas; Microcystis aeruginosa; algicides; dissolved organic matter; dominant species; hydrogen peroxide; nutrients; organic carbon; phosphates; system optimization;     Show all 11 Subjects
Abstract:
... Hydrogen peroxide (HP) is a feasible algicide to control cyanobacterial blooms, but its application in the waters with strong reductive power is still a problem. The rapid decomposition rate of HP results in a short residence time in the waters, which renders the failure of bloom mitigation. In this study, the damage of Microcystis aeruginosa (M. aeruginosa) by HP, the optimization method for Micr ...
DOI:
10.1016/j.chemosphere.2019.04.138

11. Short-term warming shifts microbial nutrient limitation without changing the bacterial community structure in an alpine timberline of the eastern Tibetan Plateau

Author:
Zheng, Haifeng; Liu, Yang; Chen, Yamei; Zhang, Jian; Li, Hongjie; Wang, Lifeng; Chen, Qianmei
Source:
Geoderma 2020 v.360 pp. 113985
ISSN:
0016-7061
Subject:
total dissolved nitrogen,   etc   ; bacterial communities; beta-glucosidase; biogeochemical cycles; community structure; dissolved organic carbon; ecotones; global warming; growing season; microbial carbon; mineral soils; nutrient content; organic horizons; organic soils; peroxidase; soil bacteria; soil heating; soil organic carbon; soil pH; soil physical properties; species diversity; stoichiometry; temperature; treeline; water content; China;     Show all 26 Subjects
Abstract:
... The forest-alpine ecotone is consideredsusceptible to climate change. Addressing the effects of climate warming on the structure and function of the soil microbial community will provide insights into carbon (C) and nutrient cycling under climate change. A short-term open-top chamber (OTC) experiment was conducted in the alpine timberline of the eastern Tibetan Plateau to test the effects of exper ...
DOI:
10.1016/j.geoderma.2019.113985

12. Nutrient inputs from the leaf decay of Cynodon dactylon (L.) Pers in the water level fluctuation zone of a Three Gorges tributary

Author:
Chen, Xi; Zhang, Shuai; Liu, Dan; Yu, Zhiguo; Zhou, Shuang; Li, Ruijuan; Liu, Zhengxue; Lin, Junjie
Source:
The Science of the total environment 2019 v.688 pp. 718-723
ISSN:
0048-9697
Subject:
total dissolved nitrogen,   etc   ; Cynodon dactylon; altitude; biodegradation; biomass; equations; eutrophication; leaves; municipal wastewater; nutrients; pollutants; risk; total dissolved phosphorus; wastewater treatment; China;     Show all 15 Subjects
Abstract:
... Cynodon dactylon (L.) Pers (C. dactylon) is one of the dominant plants in the water level fluctuation (WLF) zone of the Three Gorges Reservoir (TGR) tributaries. However, the leaves of C. dactylon can decay to increase the inputs of nutrients under flood inundation, increasing the risk of eutrophication in the TGR tributaries. Nutrient inputs from the leaf decay of C. dactylon in three interfaces, ...
DOI:
10.1016/j.scitotenv.2019.06.357

13. Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau

Author:
Gao, Tanguang; Kang, Shichang; Chen, Rensheng; Zhang, Taigang; Zhang, Tingjun; Han, Chuntan; Tripathee, Lekhendra; Sillanpää, Mika; Zhang, Yulan
Source:
The Science of the total environment 2019 v.686 pp. 370-381
ISSN:
0048-9697
Subject:
total dissolved nitrogen,   etc   ; absorbance; aromatic compounds; basins; climate change; dissolved organic carbon; drainage; permafrost; rivers; snowpack; spring; summer; watersheds; Arctic region; China;     Show all 15 Subjects
Abstract:
... Riverine dissolved organic carbon (DOC) and its optical properties were investigated in two sub-river basins (Yeniugou and Hulugou river) of the Upper Heihe river basin in the northern Tibetan Plateau. The results showed that DOC concentrations ranged from 0.25 to 12.2 and 0.18–1.04 mg L−1 for Yeniugou and Hulugou river basin with an average of 0.82 and 0.33 mg L−1, respectively. Export of DOC fro ...
DOI:
10.1016/j.scitotenv.2019.05.478

14. Excess nutrient loads to Lake Taihu: Opportunities for nutrient reduction

Author:
Wang, Mengru; Strokal, Maryna; Burek, Peter; Kroeze, Carolien; Ma, Lin; Janssen, Annette B.G.
Source:
The Science of the total environment 2019 v.664 pp. 865-873
ISSN:
0048-9697
Subject:
total dissolved nitrogen,   etc   ; anthropogenic activities; chlorophyll; critical load; eutrophication; intensive farming; lakes; mineral fertilizers; models; nitrogen; nutrient use efficiency; nutrients; phosphorus; rivers; sewage systems; urbanization; wastewater treatment;     Show all 17 Subjects
Abstract:
... Intensive agriculture and rapid urbanization have increased nutrient inputs to Lake Taihu in recent decades. This resulted in eutrophication. We aim to better understand the sources of river export of total dissolved nitrogen (TDN) and phosphorus (TDP) to Lake Taihu in relation to critical nutrient loads. We implemented the MARINA-Lake (Model to Assess River Inputs of Nutrients to seAs) model for ...
DOI:
10.1016/j.scitotenv.2019.02.051

15. The nutrient footprint of a submerged‐cage offshore aquaculture facility located in the tropical Caribbean

Author:
Welch, Aaron W.; Knapp, Angela N.; El Tourky, Sharein; Daughtery, Zachary; Hitchcock, Gary; Benetti, Daniel
Source:
Journal of the World Aquaculture Society 2019 v.50 no.2 pp. 299-316
ISSN:
0893-8849
Subject:
total dissolved nitrogen,   etc   ; chlorophyll; dissolved oxygen; farms; fish culture; nitrates; nitrites; nutrients; organic nitrogen; particulate organic carbon; sediments; stakeholders; Caribbean; United States;     Show all 14 Subjects
Abstract:
... The effect of effluent generated by a commercially scaled offshore (~13 km) finfish aquaculture facility in the tropical Caribbean on the water column and benthic nutrients and chlorophyll‐a is described. Water column samples were collected up‐ and downstream of the site at various times between 2012 and 2018. Typically, no significant difference in dissolved oxygen, chlorophyll‐a, particulate org ...
DOI:
10.1111/jwas.12593

16. Urban wastewater photobiotreatment with microalgae in a continuously operated photobioreactor: growth, nutrient removal kinetics and biomass coagulation–flocculation

Author:
Mennaa, Fatima Zahra; Arbib, Zouhayr; Perales, José Antonio
Source:
Environmental technology 2019 v.40 no.3 pp. 342-355
ISSN:
1479-487X
Subject:
total dissolved nitrogen,   etc   ; aluminum sulfate; biomass; carbon dioxide; coagulants; environmental technology; ferric chloride; ferric sulfate; flocculants; harvesting; microalgae; pH; phosphorus; photobioreactors; polymers; wastewater;     Show all 16 Subjects
Abstract:
... The aim of this study was to investigate the growth, nutrient removal and harvesting of a natural microalgae bloom cultivated in urban wastewater in a bubble column photobioreactor. Batch and continuous mode experiments were carried out with and without pH control by means of CO₂ dosage. Four coagulants (aluminium sulphate, ferric sulphate, ferric chloride and polyaluminium chloride (PAC)) and fiv ...
DOI:
10.1080/09593330.2017.1393011

17. Dissolved carbon, greenhouse gases, and δ13C dynamics in four estuaries across a land use gradient

Author:
Looman, Arun; Santos, Isaac R.; Tait, Douglas R.; Webb, Jackie; Holloway, Ceylena; Maher, Damien T.
Source:
Aquatic sciences 2019 v.81 no.1 pp. 22
ISSN:
1015-1621
Subject:
total dissolved nitrogen,   etc   ; carbon cycle; carbon dioxide; dissolved organic carbon; estuaries; greenhouse gases; hydrology; land use; methane; nutrient availability; nutrients; phosphorus; stable isotopes; streams; watersheds;     Show all 15 Subjects
Abstract:
... Land use is a well known driver of nutrient dynamics in estuaries, however less is known about how land use may influence the coastal carbon (C) cycle. Here, we report dissolved carbon concentrations, δ¹³C isotopic signatures, and water–air CO₂ and CH₄ fluxes for four Australian estuaries with contrasting catchment land use ranging from 9 to 72% natural. Water samples were collected during dry and ...
DOI:
10.1007/s00027-018-0617-9

18. Correction to: Influence of Biochar from Slow Pyrolysis on Dissolved Organic Carbon and Total Dissolved Nitrogen Levels of Urban Storm-Water Runoff

Author:
Mancinelli, Enrico; Baltrėnaitė, Edita; Baltrėnas, Pranas; Grubliauskas, Raimondas; Marčiulaitienė, Eglė; Passerini, Giorgio; Pranskevičius, Mantas
Source:
Water, air, and soil pollution 2018 v.229 no.8 pp. 265
ISSN:
0049-6979
Subject:
total dissolved nitrogen,   etc   ; biochar; dissolved organic carbon; pyrolysis; runoff; statistical analysis;     Show all 6 Subjects
Abstract:
... In the original publication, the numbers 289 and 290 were added in Table 1 footnote. The table footnote should read “Flow-rates are shown as the mean value (n = 5) ± standard deviation. USWR urban storm-water runoff”. ...
DOI:
10.1007/s11270-018-3927-6

19. Synergy of carbon and nitrogen removal of a co-culture of two aerobic denitrifying bacterial strains, Acinetobacter sp. GA and Pseudomonas sp. GP

Author:
Guo, Yan; Yang, Ruili; Zhang, Zhaoji; Wang, Xiaojun; Ye, Xin; Chen, Shaohua
Source:
RSC advances 2018 v.8 no.38 pp. 21558-21565
ISSN:
2046-2069
Subject:
total dissolved nitrogen,   etc   ; Acinetobacter; Pseudomonas; bacteria; coculture; denitrification; denitrifying microorganisms; nitrogen; pollution control; total organic carbon;     Show all 10 Subjects
Abstract:
... Two newly isolated aerobic denitrifying bacterial strains (Acinetobacter sp. GA and Pseudomonas sp. GP) were co-cultured to investigate the synergy of carbon and nitrogen removal of different functional bacteria. The co-culture showed higher efficiency for removing total organic carbon (TOC) and total dissolved nitrogen (TDN) than strain GA or GP cultured separately. The inoculation ratio of 50 (s ...
DOI:
10.1039/c8ra02721h

20. Simultaneous determination of total dissolved nitrogen and total dissolved phosphorus in natural waters with an on-line UV and thermal digestion

Author:
Lin, Kunning; Pei, Junxian; Li, Peicong; Ma, Jian; Li, Quanlong; Yuan, Dongxing
Source:
Talanta 2018 v.185 pp. 419-426
ISSN:
0039-9140
Subject:
total dissolved nitrogen,   etc   ; colorimetry; detection limit; experimental design; models; monitoring; nitrates; nitrogen; phosphates; phosphorus; total dissolved phosphorus;     Show all 11 Subjects
Abstract:
... A flow injection method combined with an on-line UV and thermal digestion for simultaneous determination of total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP) in natural waters was established in this study. A novel flow manifold made the proposed system compact and automatic. The conversion rates of various nitrogen and phosphorus compounds to their nitrate and phosphate forms wi ...
DOI:
10.1016/j.talanta.2018.03.085