U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "eutrophication" Remove constraint Subject: "eutrophication"
Start Over

Search

13,358  Search Results

« Previous | 1 - 20 of 13,358 |
Number of results to display per page

Search Results

1. Effect of dissolved oxygen on methane production from bottom sediment in a eutrophic stratified lake

Author:
Yasuyuki Maruya; Keisuke Nakayama; Masafumi Sasaki; Katsuaki Komai
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 61-72
ISSN:
1001-0742
Subject:
eutrophication,   etc   ; cold; dissolved oxygen; lakes; mathematical models; methane; methane production; sediments; sulfates; uncertainty; China;     Show all 11 Subjects
Abstract:
... Clarifying the role of sulfate and dissolved oxygen (DO) in methane production may allow for precise and accurate modeling of methane emissions in eutrophic lakes. We conducted field observations of sulfate, methane, and DO concentrations in Lake Abashiri, a typical brackish and eutrophic lake in a cold region, to develop a DO-based method for quantitively estimating methane production in a eutrop ...
DOI:
10.1016/j.jes.2022.01.025

2. Phosphorus supply chain for sustainable food production will have mitigated environmental pressure with region-specific phosphorus management

Author:
Haiqing Gong; Jiechen Wu; Gu Feng; Xiaoqiang Jiao
Source:
Resources, conservation, and recycling 2023 v.188 pp. 106686
ISSN:
0921-3449
Subject:
eutrophication,   etc   ; agroecology; crop production; fertilizer application; food security; phosphorus; phosphorus fertilizers; supply chain; sustainable agriculture; China;     Show all 10 Subjects
Abstract:
... Achieving synergy between food security and phosphorus (P) resource sustainability has been a major challenge for sustainable agriculture. However, addressing this challenge by linking region-specific and whole-process P management strategies has not been investigated. In this study, data collected from field experiments throughout China's major agroecological zones were used to explore potential ...
DOI:
10.1016/j.resconrec.2022.106686

3. Changes of DOM and its correlation with internal nutrient release during cyanobacterial growth and decline in Lake Chaohu, China

Author:
Yan Bao; Tao Huang; Chengwu Ning; Tingting Sun; Pengliang Tao; Jie Wang; Qingye Sun
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 769-781
ISSN:
1001-0742
Subject:
eutrophication,   etc   ; algae; dissolved organic matter; fluorescence; humification; lakes; ligands; mineralization; molecular weight; phosphorus; temperature; total phosphorus; China;     Show all 13 Subjects
Abstract:
... The seasonal changes in dissolved organic matter (DOM), and its correlation with the release of internal nutrients during the annual cycle of cyanobacteria in the eutrophic Lake Chaohu, China, were investigated from four sampling periods between November 2020 and July 2021. The DOM fluorescence components were identified as protein-like C1, microbial humic-like C2, and terrestrial humic-like C3. T ...
DOI:
10.1016/j.jes.2022.02.019

4. Ex-ante life cycle assessment framework and application to a nano-reinforced biopolymer film based on mango kernel

Author:
Jade Müller-Carneiro; Maria Cléa Brito de Figueirêdo; Carla Rodrigues; Henriette Monteiro Cordeiro de Azeredo; Fausto Freire
Source:
Resources, conservation, and recycling 2023 v.188 no. pp. 106637
ISSN:
0921-3449
Subject:
eutrophication,   etc   ; acidification; biopolymers; climate change; economic valuation; feedstocks; freshwater; life cycle assessment; mangoes; models; nanocrystals; nonrenewable resources; polyethylene; seeds; starch; sustainable technology;     Show all 16 Subjects
Abstract:
... This article proposes a framework for ex-ante life cycle assessment (LCA) of biopolymers at low TRL, including: (i) scale-up; (ii) scenarios for processes and modelling choices; (iii) comparison with a fossil-based polymer, considering material substitution factors. The framework was applied to analyse a mango kernel starch (MKS) film and compare it with low-density polyethylene (LDPE). Mango seed ...
DOI:
10.1016/j.resconrec.2022.106637

5. Towards the outwelling hypothesis in a Patagonian estuary: First support from lipid markers and bacterial communities

Author:
Germán A. Kopprio; Ana Martínez; Anna Fricke; Michael Hupfer; Rubén J. Lara; Martin Graeve; Astrid Gärdes
Source:
Science of the total environment 2023 v.854 pp. 158670
ISSN:
0048-9697
Subject:
eutrophication,   etc   ; Actinobacteria; Bacteroidia; Desulfobacterales; Rhodobacterales; bacterial communities; biodiversity; biogeography; community structure; environment; estuaries; fatty acids; gamma-Proteobacteria; microalgae; organic matter; particulates; sulfates; wetlands; Argentina;     Show all 19 Subjects
Abstract:
... Biogeochemical markers in combination with bacterial community composition were studied at two contrasting stations at the Río Negro (RN) estuary to assess the outwelling hypothesis in the Argentinian Patagonia. Inorganic nutrients and dissolved organic matter were exported clearly during the last hours of the ebb at the station Wetland. Moreover, a considerable outwelling of polyunsaturated fatty ...
DOI:
10.1016/j.scitotenv.2022.158670

6. Benchmarking environmental impacts of power groups used in a designed UAV: Hybrid hydrogen fuel cell system versus lithium-polymer battery drive system

Author:
Duran Çalışır; Selcuk Ekici; Adnan Midilli; T. Hikmet Karakoc
Source:
Energy 2023 v.262 pp. 125543
ISSN:
0360-5442
Subject:
eutrophication,   etc   ; acidification; batteries; clean energy; computer software; databases; ecotoxicology; electric motors; energy; environmental assessment; environmental impact; fuels; hybrids; hydrogen fuel cells; inventories; life cycle assessment; lithium; oxidation; ozonosphere; photochemistry; polymers; propellers;     Show all 22 Subjects
Abstract:
... This study investigates the environmental impacts of using two different power groups in a fixed-wing Unmanned Aerial Vehicle (UAV). The first power group consists of a conventional electric motor, a lithium polymer battery and a propeller. The second power group is the hybrid power group formed by adding the Proton Exchange Membrane (PEM) fuel cell. The life cycle assessment (LCA) method is appli ...
DOI:
10.1016/j.energy.2022.125543

7. Liming shifts the chemical properties and microbial community structures of peanut soils with different initial pH values

Author:
Ya Lu; Hongcui Dai; Kazem Zamanian; Qiqi Sun; Caibin Wang; Zhengfeng Wu; Yongmei Zheng; Lin Li; Shubo Wan; Tianyi Yu
Source:
Applied soil ecology 2023 v.181 pp. 104665
ISSN:
0929-1393
Subject:
eutrophication,   etc   ; Acidobacteria; Arachis hypogaea; Chloroflexi; Nitrospirae; Verrucomicrobia; bacterial communities; calcium; calcium deficiency; calcium oxide; community structure; denitrification; exchangeable calcium; exchangeable potassium; metabolism; nitrification; nitrogen; nitrogen fixation; pH; pathogens; peanuts; phosphorus; soil; soil ecology; total nitrogen; China;     Show all 26 Subjects
Abstract:
... Peanut (Arachis hypogaea) yield is often reduced by calcium (Ca) deficiency. Ca deficiency of peanut plants is likely to occur in most acidified soils (ASs, pH < 5.5) and some neutral soils (NSs, pH 6.5–7.5) in China. Liming is widely used to supply Ca and increase peanut yield. Nevertheless, the effects of liming on the chemical and microbial properties of peanut soils are still unclear, particul ...
DOI:
10.1016/j.apsoil.2022.104665

8. A step towards sustainable aquaculture: Multiobjective feed formulation reduces environmental impacts at feed and farm levels for rainbow trout

Author:
Aurélie Wilfart; Florence Garcia-Launay; Frederic Terrier; Espoir Soudé; Pierre Aguirre; Sandrine Skiba-Cassy
Source:
Aquaculture 2023 v.562 pp. 738826
ISSN:
0044-8486
Subject:
eutrophication,   etc   ; Oncorhynchus mykiss; acidification; animal growth; aquaculture; body weight changes; climate change; coproducts; diet; digestibility; ecological footprint; environmental impact; faba beans; farms; feed formulation; feed intake; fish meal; fish oils; fish production; gluten; land use; nonrenewable resources; prices; rapeseed oil; trout;     Show all 25 Subjects
Abstract:
... Aquaculture is growing to meet the increasing demand for aquaculture products but is not free of environmental impacts. One solution is to improve how feed are formulated, limiting the environmental impact of fish production. Multiobjective (MO) formulation, which aims for a compromise between lower cost and lower environmental impacts, appears to be a promising solution to reduce the environmenta ...
DOI:
10.1016/j.aquaculture.2022.738826

9. The annual excursion of the Nordic Bryological Society (NBS) and the Finnish Bryophyte Expert Group to Finnish Lapland in 2019

Author:
Kati Pihlaja; Riikka Juutinen; Tapani Sallantaus; Kimmo Syrjänen; Rudi Zielman; Michael Lüth; Esa Ervasti; Tuomo Kuitunen; Kristian Hassel; Kjell Ivar Flatberg; Richard Åkesson; Eva Mikulášková; Pia Kangas; Antje Neumann
Source:
Lindbergia 2022 v.2020 no.1 pp. linbg.01158
ISSN:
0105-0761
Subject:
eutrophication,   etc   ; Sphagnum; fens; geographical distribution; Finland; Lapland;     Show all 6 Subjects
Abstract:
... The Nordic Bryological Society held its Annual meeting and excursion from 5 to 9 August 2019 in Sodankylä, Kittilä and Kolari in northern Finland. The excursion was attended by twenty-one participants. Special emphasis was given to boreal aapa mires and their Sphagnum species. A multitude of Sphagnum species typical to the area was encountered. Also, Red Listed species of meso- and eutrophic flark ...
DOI:
10.25227/linbg.01158

10. Validation and Assessment of Diffusive Gradients in Thin-Films (DGT) Technique for Measuring Nutrients in Taihu Lake Water with Algae Bloom

Author:
Danxing Yang; Haiyi Chen; Haitao Sun; Jun Luo; Yanying Li
Source:
Bulletin of environmental contamination and toxicology 2022 v.108 no.5 pp. 943-948
ISSN:
0007-4861
Subject:
eutrophication,   etc   ; bioavailability; lakes; nitrogen; phosphorus; pollution; toxicology;     Show all 7 Subjects
Abstract:
... DGT (diffusive gradients in thin films) technique has been developed for measuring nitrogen in freshwaters and applied to assess the bioavailability of phosphorus in soils/sediments. These two elements are the main nutrients causing algae bloom, but DGT has never been used in the field water conditions with algae bloom. In our study, a pair of DGT devices were used in comparison with grab sampling ...
DOI:
10.1007/s00128-022-03470-1

11. Dominance of evaporation on lacustrine groundwater discharge to regulate lake nutrient state and algal blooms

Author:
Xiaoyan Shi; Xin Luo; Jiu Jimmy Jiao; Jinchao Zuo
Source:
Water research 2022 v.219 pp. 118620
ISSN:
0043-1354
Subject:
eutrophication,   etc   ; evaporation; freshwater; groundwater; poisonous algae; research;     Show all 6 Subjects
Abstract:
... As global threats to freshwater lakes, eutrophication and harmful algal blooms (HABs) are governed by various biogeochemical, climatological and anthropogenic processes. Groundwater is key to join these processes in regulating HABs, but the underlying mechanisms remain unclear. Here, we leveraged basin-wide field data of Lake Taihu (China's largest eutrophic lake) and global archives, and demonstr ...
DOI:
10.1016/j.watres.2022.118620

12. Sand-capping stabilizes muddy sediment and improves benthic light conditions in eutrophic estuaries: Laboratory verification and the potential for recovery of eelgrass (Zostera marina)

Author:
Mogens R. Flindt; Nele S. Oncken; Kadri Kuusemäe; Troels Lange; Nicolaj Aaskoven; Sonja Winter; Ana I. Sousa; Erik K. Rasmussen; Paula Canal-Verges; Rod M. Connolly; Erik Kristensen
Source:
Journal of sea research 2022 v.181 pp. 102177
ISSN:
1385-1101
Subject:
eutrophication,   etc   ; Zostera marina; research; sand; turbidity; vegetation;     Show all 6 Subjects
Abstract:
... Decades of eutrophication have increased water turbidity in Danish estuaries and led to light limitation of eelgrass (Zostera marina) growth. Former eelgrass areas are now denuded and consist of organic-rich muddy sediment with frequent resuspension events that maintain a high turbidity state. In addition, low anchoring capacity of eelgrass in the soft organic-rich sediments has contributed to eel ...
DOI:
10.1016/j.seares.2022.102177

13. Anthropogenic pressures enhance the deleterious effects of extreme storms on rocky shore communities

Author:
Carlos Sanz-Lazaro; Nuria Casado-Coy; Aitor Navarro-Ortín; Marc Terradas-Fernández
Source:
Science of the total environment 2022 v.817 pp. 152917
ISSN:
0048-9697
Subject:
eutrophication,   etc   ; anthropogenic activities; climate change; littoral zone; storms;     Show all 5 Subjects
Abstract:
... Climate change is not only changing the mean values of environmental parameters that modulate ecosystems, but also the regime of disturbances. Among them, extreme events have a key role in structuring biological communities. Ecosystems are frequently suffering multiple anthropogenic pressures which can cause effects that are not additive. Thus, the effects of extreme events need to be studied in c ...
DOI:
10.1016/j.scitotenv.2022.152917

14. Dynamic chamber as a more reliable technique for measuring methane emissions from aquatic ecosystems

Author:
Jichun Mu; Jing Qi; Hongwei Yu; Chengzhi Hu; Yujing Mu; Jiuhui Qu
Source:
Science of the total environment 2022 v.851 pp. 158147
ISSN:
0048-9697
Subject:
eutrophication,   etc   ; air; environment; greenhouses; methane; surface water; uncertainty;     Show all 7 Subjects
Abstract:
... Aquatic ecosystems are the largest natural source of atmospheric methane (“CH₄”) worldwide. However, the current estimation of CH₄ emissions from aquatic ecosystems still has extensive uncertainty due to large spatiotemporal variations in CH₄ emissions as well as significant uncertainty in measurement methods. In this study, we initially investigated CH₄ fluxes from a simulated eutrophic water bod ...
DOI:
10.1016/j.scitotenv.2022.158147

15. Immunoassay technology: Research progress in microcystin-LR detection in water samples

Author:
Huixia Zhang; Bingyan Li; Yipeng Liu; Huiyan Chuan; Yong Liu; Ping Xie
Source:
Journal of hazardous materials 2022 v.424 pp. 127406
ISSN:
0304-3894
Subject:
eutrophication,   etc   ; Cyanobacteria; antibodies; antigens; death; freshwater; microcystin-LR;     Show all 7 Subjects
Abstract:
... Increasing global warming and eutrophication have led to frequent outbreaks of cyanobacteria blooms in freshwater. Cyanobacteria blooms cause the death of aquatic and terrestrial organisms and have attracted considerable attention since the 19th century. Microcystin-LR (MC-LR) is one of the most typical cyanobacterial toxins. Therefore, the fast, sensitive, and accurate determination of MC-LR play ...
DOI:
10.1016/j.jhazmat.2021.127406

16. Water Quality Chl-a Inversion Based on Spatio-Temporal Fusion and Convolutional Neural Network

Author:
Haibo Yang; Yao Du; Hongling Zhao; Fei Chen
Source:
Remote Sensing 2022 v.14 no.5 pp. -
ISSN:
2072-4292
Subject:
eutrophication,   etc   ; Landsat; algorithms; lakes; neural networks; water quality;     Show all 6 Subjects
Abstract:
... The combination of remote sensing technology and traditional field sampling provides a convenient way to monitor inland water. However, limited by the resolution of remote sensing images and cloud contamination, the current water quality inversion products do not provide both high temporal resolution and high spatial resolution. By using the spatio-temporal fusion (STF) method, high spatial resolu ...
DOI:
10.3390/rs14051267

17. Analysis of oxygen isotopes of inorganic phosphate (δ18Op) in freshwater: A detailed method description for obtaining oxygen isotopes of inorganic phosphate in environmental water samples

Author:
Catharina S. Nisbeth; Federica Tamburini; Jacob Kidmose; Søren Jessen; David W. O'Connell
Source:
MethodsX 2022 v.9 pp. 101706
ISSN:
2215-0161
Subject:
eutrophication,   etc   ; freshwater; orthophosphates; oxygen; oxygen isotopes; phosphorus; silver;     Show all 7 Subjects
Abstract:
... The ability to identify the origin of phosphorus and understand processes controlling P cycling is essential for designing effective mitigation and restoration of eutrophic freshwater ecosystems. The oxygen isotope composition of orthophosphate (δ¹⁸Oₚ) has significant potential as a tracer for P entering freshwater ecosystems. However, methods of analysis of δ¹⁸Oₚ are still in their preliminary st ...
DOI:
10.1016/j.mex.2022.101706

18. Simulations and interpretations of cumulative trophic theory

Author:
Jason S. Link; Fabio Pranovi; Simone Libralato
Source:
Ecological modelling 2022 v.463 pp. 109800
ISSN:
0304-3800
Subject:
eutrophication,   etc   ; biomass; equations; marine ecosystems; mortality; trophic levels;     Show all 6 Subjects
Abstract:
... Examining marine ecosystems in a distinct way can produce new ecological, theoretical and applied insights. The common “S” and “hockey stick” -shaped curves, which result from examining the cumulative biomass and trophic level and the cumulative production and cumulative biomass curves of marine ecosystems, have strong potential to elucidate the mechanisms of marine food webs. These curves are bas ...
DOI:
10.1016/j.ecolmodel.2021.109800

19. Water Quality Retrieval from Landsat-9 (OLI-2) Imagery and Comparison to Sentinel-2

Author:
Milad Niroumand-Jadidi; Francesca Bovolo; Mariano Bresciani; Peter Gege; Claudia Giardino
Source:
Remote Sensing 2022 v.14 no.18 pp. -
ISSN:
2072-4292
Subject:
eutrophication,   etc   ; Landsat; chlorophyll; radiometry; regression analysis; water quality;     Show all 6 Subjects
Abstract:
... The Landsat series has marked the history of Earth observation by performing the longest continuous imaging program from space. The recent Landsat-9 carrying Operational Land Imager 2 (OLI-2) captures a higher dynamic range than sensors aboard Landsat-8 or Sentinel-2 (14-bit vs. 12-bit) that can potentially push forward the frontiers of aquatic remote sensing. This potential stems from the enhance ...
DOI:
10.3390/rs14184596

20. The crucial influence of trophic status on the relative requirement of nitrogen to phosphorus for phytoplankton growth

Author:
Mengqi Jiang; Shin-ichi Nakano
Source:
Water research 2022 v.222 pp. 118868
ISSN:
0043-1354
Subject:
eutrophication,   etc   ; nitrogen; nutrient availability; phosphorus; phytoplankton; research; water;     Show all 7 Subjects
Abstract:
... Clarifying the pattern of relative nitrogen (N)-to-phosphorus (P) requirements for phytoplankton growth is of great significance for eutrophication mitigation and aquatic system management. The relative N-to-P requirement for phytoplankton growth is considered an essential trait determining species dominance within ecosystems and explaining phytoplankton response to nutrient availability. These re ...
DOI:
10.1016/j.watres.2022.118868