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1. A review on the geochemistry of lakes in Victoria Land (Antarctica)

Author:
Porcino, Nunziatina; Cosenza, Alessandro; Azzaro, Maurizio
Source:
Chemosphere 2020 v.251 pp. 126229
ISSN:
0045-6535
Subject:
biogeochemistry,   etc   ; chemometrics; lakes; ponds; Antarctic region; Antarctica;     Show all 6 Subjects
Abstract:
... This paper reports briefly the concentrations of major elements of 3116 samples of lakes in the Victoria Land region. The data obtained by different works were processed through multivariate chemometric techniques to gain insight into the biogeochemical processes taking place in the lacustrine systems. Antarctic ice-free areas contain lakes and ponds that have interesting chemical features and are ...
DOI:
10.1016/j.chemosphere.2020.126229

2. Offshore transport of organic carbon by upwelling filaments in the Canary Current System

Author:
Santana-Falcón, Yeray; Mason, Evan; Arístegui, Javier
Source:
Progress in oceanography 2020 pp. 102322
ISSN:
0079-6611
Subject:
biogeochemistry,   etc   ; autumn; seasonal variation; spring; summer; total organic carbon;     Show all 6 Subjects
Abstract:
... A coupled physical-biogeochemical model (ROMS-PISCES) forced by climatological fields is used to examine the role of upwelling filaments in the offshore exchange of particulate (POC) and dissolved (DOC) organic carbon in the Canary Current eastern boundary upwelling system (CanC EBUS). In this region, mesoscale filaments at Capes Ghir (∼30.5 °N) and Juby (∼27.5 °N) have been frequently described u ...
DOI:
10.1016/j.pocean.2020.102322

3. Assessing connectivity between the river channel and floodplains during high flows using hydrodynamic modeling and particle tracking analysis

Author:
Chen, Xiaobing; Chen, Li; Stone, Mark C.; Acharya, Kumud
Source:
Journal of hydrology 2020 v.583 pp. 124609
ISSN:
0022-1694
Subject:
biogeochemistry,   etc   ; floodplains; floods; hydrograph; hydrologic models; rivers; Nevada;     Show all 7 Subjects
Abstract:
... River-floodplain connectivity is vital to hydrological and biogeochemical processes in river corridors over multiple spatiotemporal scales. In the present study, an approach of particle tracking in conjunction with two-dimensional hydrodynamic modeling was developed to study the dynamics of river-floodplain connectivity during flood periods and applied to the study of McCarran Ranch in the lower T ...
DOI:
10.1016/j.jhydrol.2020.124609

4. Facets and scales in river restoration: Nestedness and interdependence of hydrological, geomorphic, ecological, and biogeochemical processes

Author:
Polvi, Lina E.; Lind, Lovisa; Persson, Henrik; Miranda-Melo, Aneliza; Pilotto, Francesca; Su, Xiaolei; Nilsson, Christer
Source:
Journal of environmental management 2020 v.265 pp. 110288
ISSN:
0301-4797
Subject:
biogeochemistry,   etc   ; anthropogenic activities; ecological communities; ecological restoration; ecoregions; geomorphology; government agencies; hydrology; nestedness; rivers; watersheds; Sweden;     Show all 12 Subjects
Abstract:
... Although river restoration has increased rapidly, observations of successful ecological recovery are rare, mostly due to a discrepancy in the spatial scale of the impact and the restoration. Rivers and their ecological communities are a product of four river facets—hydrology, geomorphology, ecology and biogeochemistry—that act and interact on several spatial scales, from the sub-reach to the reach ...
DOI:
10.1016/j.jenvman.2020.110288

5. Factors regulating the coastal nutrient filter in the Baltic Sea

Author:
Carstensen, Jacob; Conley, Daniel J.; Almroth-Rosell, Elin; Asmala, Eero; Bonsdorff, Erik; Fleming-Lehtinen, Vivi; Gustafsson, Bo G.; Gustafsson, Camilla; Heiskanen, Anna-Stiina; Janas, Urzsula; Norkko, Alf; Slomp, Caroline; Villnäs, Anna; Voss, Maren; Zilius, Mindaugas
Source:
Ambio 2020 v.49 no.6 pp. 1194-1210
ISSN:
0044-7447
Subject:
biogeochemistry,   etc   ; coastal ecosystems; coasts; denitrification; eutrophication; fauna; nitrates; nitrogen; nutrients; organic matter; phosphorus; vegetation; Baltic Sea;     Show all 13 Subjects
Abstract:
... The coastal zone of the Baltic Sea is diverse with strong regional differences in the physico-chemical setting. This diversity is also reflected in the importance of different biogeochemical processes altering nutrient and organic matter fluxes on the passage from land to sea. This review investigates the most important processes for removal of nutrients and organic matter, and the factors that re ...
DOI:
10.1007/s13280-019-01282-y
PubMed:
31707582
PubMed Central:
PMC7128010

6. Analysis of surfactant-associated bacteria in the sea surface microlayer using deoxyribonucleic acid sequencing and synthetic aperture radar

Author:
Parks, Georgia; Dean, Cayla W.; Kluge, John A.; Soloviev, Alexander V.; Shivji, Mahmood; Tartar, Aurelien; Howe, Kathryn L.; Lehner, Susanne; Schwarz, Egbert; Shen, Hui; Perrie, William; Schuler, Paul
Source:
International journal of remote sensing 2020 v.41 no.10 pp. 3886-3901
ISSN:
1366-5901
Subject:
biogeochemistry,   etc   ; DNA; bacteria; oils; remote sensing; space and time; surface tension; surfactants; synthetic aperture radar;     Show all 9 Subjects
Abstract:
... The sea surface microlayer (SML) is the upper 1 mm of the ocean, where Earth’s biogeochemical processes occur between the ocean and atmosphere. It is physicochemically distinct from the water below and highly variable in space and time due to changing physical conditions. Some microorganisms influence the composition of the SML by producing surfactants for biological functions that accumulate on t ...
DOI:
10.1080/01431161.2019.1708508

7. A new colorimetric DET technique for determining mm-resolution sulfide porewater distributions and allowing improved interpretation of iron(II) co-distributions

Author:
Kankanamge, Nadeeka Rathnayake; Bennett, William W.; Teasdale, Peter R.; Huang, Jianyin; Welsh, David T.
Source:
Chemosphere 2020 v.244 pp. 125388
ISSN:
0045-6535
Subject:
biogeochemistry,   etc   ; Zostera; burrows; coastal sediments; colorimetry; computers; densitometry; films (materials); image analysis; iron; methylene blue; seagrasses;     Show all 12 Subjects
Abstract:
... Measurement of sulfide in pore waters is critical for understanding biogeochemical processes, especially within coastal sediments. Here we report the development of a new colorimetric DET (diffusive equilibration in thin films) technique for determining mm-resolution, two-dimensional sulfide distributions in sediment pore waters. This colorimetric sulfide DET method was based on the standard spect ...
DOI:
10.1016/j.chemosphere.2019.125388

8. Tolerance of testate amoeba species to rising sea levels under laboratory conditions and in the South Pacific

Author:
Wanner, Manfred; Birkhofer, Klaus; Puppe, Daniel; Shimano, Satoshi D.; Shimizu, Miki
Source:
Pedobiologia 2020 v.79 pp. 150610
ISSN:
0031-4056
Subject:
biogeochemistry,   etc   ; climate change; culture media; habitats; microorganisms; salinity; silicon; soil; Tuvalu;     Show all 9 Subjects
Abstract:
... Testate amoebae are ubiquitous unicellular eukaryotic micro-organisms. They occur in high abundances in terrestrial habitats and contribute to important ecological and biogeochemical processes like silicon cycling. Little is known about the growth of testate amoeba populations under hyperosmotic stress, as caused by salinity pulses due to coastal flooding. Given the increasing sea-levels in respon ...
DOI:
10.1016/j.pedobi.2019.150610

9. Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA)

Author:
Jones, Colleen P.; Amacher, Michael C.; Grossl, Paul R.; Jacobson, Astrid R.
Source:
Applied geochemistry 2020 v.113 pp. 104517
ISSN:
0883-2927
Subject:
biogeochemistry,   etc   ; aquatic ecosystems; bioaccumulation; fauna; flora; lakes; sediments; selenium; sorption; volatilization; wetlands; Utah;     Show all 12 Subjects
Abstract:
... Selenium (Se) has potentially deleterious impacts on flora and fauna of aquatic ecosystems. As Se moves through a wetlands system, various processes such as sorption onto sediments, plant uptake, and volatilization into the atmosphere can attenuate Se resulting in its storage in the wetlands. A comparison of inlet and outlet Se fluxes can be used to determine the mass of Se stored in a wetlands sy ...
DOI:
10.1016/j.apgeochem.2019.104517

10. An approach for retrieval of horizontal and vertical distribution of total suspended matter concentration from GOCI data over Lake Hongze

Author:
Lei, Shaohua; Xu, Jie; Li, Yunmei; Du, Chenggong; Liu, Ge; Zheng, Zhubin; Xu, Yifan; Lyu, Heng; Mu, Meng; Miao, Song; Zeng, Shuai; Xu, Jiafeng; Li, Lingling
Source:
The Science of the total environment 2020 v.700 pp. 134524
ISSN:
0048-9697
Subject:
biogeochemistry,   etc   ; color; lakes; models; prediction; regression analysis; spatial distribution; spring; wind speed; winter; China;     Show all 11 Subjects
Abstract:
... There are a few studies working on the vertical distribution of TSM, however, understanding the underwater profile of TSM is of great benefit to the study of biogeochemical processes in the water column that still require further research. In this study, three data-gathering expeditions were conducted in Lake Hongze (HZL), China, between 2016 and 2018. Based on the in situ optical and biological d ...
DOI:
10.1016/j.scitotenv.2019.134524

11. A Review on the Distribution and Cycling of Mercury in the Pacific Ocean

Author:
Chen, Lufeng; Li, Yanbin
Source:
Bulletin of environmental contamination and toxicology 2019 v.102 no.5 pp. 665-671
ISSN:
0007-4861
Subject:
biogeochemistry,   etc   ; ecosystems; mercury; pollution; sediments; Pacific Ocean;     Show all 6 Subjects
Abstract:
... With the rapid development of economy in surrounding land, the Pacific Ocean is facing a number of serious environmental challenges, including mercury (Hg) pollution. Over the past several decades, a number of studies have been conducted on investigating the cycling of Hg in this ecosystem. This review summarizes recent studies on the distribution of Hg species in the water, sediment, and biota an ...
DOI:
10.1007/s00128-019-02560-x

12. Concept of microbial gatekeepers: Positive guys?

Author:
Dai, Wenfang; Chen, Jiong; Xiong, Jinbo
Source:
Applied microbiology and biotechnology 2019 v.103 no.2 pp. 633-641
ISSN:
0175-7598
Subject:
biogeochemistry,   etc   ; diagnostic techniques; microbial communities; microorganisms;     Show all 4 Subjects
Abstract:
... Microorganisms contribute diverse and fundamental roles in biogeochemical processes. In a given microbial community, individuals interact with one another to form complex regulatory networks in which gatekeepers contribute disproportional roles in sustaining stability, dynamics, and function. Owing to the ecological and functional importance of microbial gatekeeper, this review provides an overvie ...
DOI:
10.1007/s00253-018-9522-3

13. Decrease in bioavailability of soil heavy metals caused by the presence of microplastics varies across aggregate levels

Author:
Yu, Hong; Hou, Junhua; Dang, Qiuling; Cui, Dongyu; Xi, Beidou; Tan, Wenbing
Source:
Journal of hazardous materials 2020 v.395 pp. 122690
ISSN:
0304-3894
Subject:
biogeochemistry,   etc   ; adsorption; bioavailability; chemical speciation; chromium; copper; heavy metals; iron; manganese; microplastics; nickel; particle size; pollution; soil aggregates; soil separates;     Show all 15 Subjects
Abstract:
... Microplastics can alter the physicochemical and biogeochemical processes in soil, but whether these alterations have further the effects on the transformation of soil heavy metal speciation, and if so, whether these effects vary across soil aggregate levels remain unknown. Herein, long-term soil culture experiments and soil fractionation are combined to investigate the effects of microplastics on ...
DOI:
10.1016/j.jhazmat.2020.122690

14. High resolution evidence of iron-phosphorus-sulfur mobility at hypoxic sediment water interface: An insight to phosphorus remobilization using DGT-induced fluxes in sediments model

Author:
Norgbey, Eyram; Li, Yiping; Ya, Zhu; Li, Ronghui; Nwankwegu, Amechi S.; Takyi-Annan, Georgina Esi; Luo, Fan; Jin, Wei; Huang, Yanan; Sarpong, Linda
Source:
The Science of the total environment 2020 v.724 pp. 138204
ISSN:
0048-9697
Subject:
biogeochemistry,   etc   ; coprecipitation; densitometry; dialysis; eutrophication; films (materials); hypoxia; image analysis; iron; models; phosphorus; pyrite; sediment-water interface; sediments; sulfates; China;     Show all 16 Subjects
Abstract:
... The deterioration of reservoirs in southern China due to the kinetics of Iron (Fe), Phosphorus (P) and sulphide (S) at the sediment-water interface (SWI) is a major problem that needs urgent attention. Studies on the biogeochemistry of Fe, P, and S using high-resolution profile techniques in reservoirs in this region are limited. The diffusive gradient in thin films (DGT) technique, high-resolutio ...
DOI:
10.1016/j.scitotenv.2020.138204

15. A hydrologic feature detection algorithm to quantify seasonal components of flow regimes

Author:
Patterson, Noelle K.; Lane, Belize A.; Sandoval-Solis, Samuel; Pasternack, Gregory B.; Yarnell, Sarah M.; Qiu, Yexuan
Source:
Journal of hydrology 2020 v.585 pp. 124787
ISSN:
0022-1694
Subject:
biogeochemistry,   etc   ; algorithms; climatic factors; landscapes; life history; rivers; stream flow; streams; time series analysis; water management; California;     Show all 11 Subjects
Abstract:
... Seasonal flow transitions between wet and dry conditions are a primary control on river conditions, including biogeochemical processes and aquatic life-history strategies. In regions like California with highly seasonal flow patterns and immense interannual variability, a rigorous approach is needed to accurately identify and quantify seasonal flow transitions from the annual flow regime. Drawing ...
DOI:
10.1016/j.jhydrol.2020.124787

16. The Long-Term Relationship between Microbial Metabolism and Greenhouse Gases

Author:
Stein, Lisa Y.
Source:
Trends in microbiology 2020 v.28 no.6 pp. 500-511
ISSN:
0966-842X
Subject:
biogeochemistry,   etc   ; climate change; ecosystems; enzymology; gases; greenhouse gas emissions; greenhouse gases; metabolism; metals; methane; microorganisms; nitrous oxide; nitrous oxide production;     Show all 13 Subjects
Abstract:
... The production and consumption of the potent greenhouse gases, nitrous oxide and methane, are largely controlled by microorganisms that have long been assigned to defined functional guilds. However, our understanding of how microbial and biogeochemical processes interact to control the flux of these gases has expanded in recent years. The consumption and production of nitrous oxide and methane are ...
DOI:
10.1016/j.tim.2020.01.006

17. Review on protozoic silica and its role in silicon cycling

Author:
Puppe, Daniel
Source:
Geoderma 2020 v.365 pp. 114224
ISSN:
0016-7061
Subject:
biogeochemistry,   etc   ; abiotic stress; agricultural soils; aquatic ecosystems; bioavailability; biotic stress; carbon; crops; land use; plant growth; silica; silicon; terrestrial ecosystems;     Show all 13 Subjects
Abstract:
... Biogenic silicon (BSi) has been found to play a fundamental role in the link between global Si and carbon cycles, because it represents a key factor in the control of Si fluxes from terrestrial to aquatic ecosystems. Furthermore, various beneficial effects of Si accumulation in plants have been revealed, i.e., increased plant growth and resistance against abiotic and biotic stresses. Due to intens ...
DOI:
10.1016/j.geoderma.2020.114224

18. Assessment of coupled hydrologic and biogeochemical Hg cycles in a temperate forestry watershed using SWAT-Hg

Author:
Jeong, Jaehak; Yang, Jisook; Han, Seunghee; Seo, Yong-Seok; Hong, Yongseok
Source:
Environmental modelling & software 2020 v.126 pp. 104644
ISSN:
1364-8152
Subject:
biogeochemistry,   etc   ; Soil and Water Assessment Tool model; base flow; forestry; forests; mercury; simulation models; soil; soil erosion; surface water; watersheds;     Show all 11 Subjects
Abstract:
... Terrestrial and aquatic mercury biogeochemical processes are integrated into the Soil and Water Assessment Tool (SWAT) to simulate the watershed scale Hg behaviors. The SWAT-Hg was successfully calibrated and validated with the data obtained from the Jang-Sung Dam (JSD) watershed. The largest Hg storage in the watershed was found in soil (93%), however, soil erosion was not the largest Hg source f ...
DOI:
10.1016/j.envsoft.2020.104644

19. Mercury stable isotopes for monitoring the effectiveness of the Minamata Convention on Mercury

Author:
Kwon, Sae Yun; Blum, Joel D.; Yin, Runsheng; Tsui, Martin Tsz-Ki; Yang, Yo Han; Choi, Jong Woo
Source:
Earth-science reviews 2020 v.203 pp. 103111
ISSN:
0012-8252
Subject:
biogeochemistry,   etc   ; atmospheric deposition; data collection; ecosystems; fish; isotope fractionation; leaves; mercury; models; sediments; stable isotopes; tracer techniques;     Show all 12 Subjects
Abstract:
... The Minamata Convention on Mercury (MC) includes provisions for a global monitoring program (GMP) and effectiveness evaluation (EE) to provide information on changes in mercury sources in various environmental media. While conventional measurement and modeling techniques have limitations in explaining the changes in mercury concentrations, the measurements of natural abundances of mercury stable i ...
DOI:
10.1016/j.earscirev.2020.103111

20. Maize straw biochar addition inhibited pentachlorophenol dechlorination by strengthening the predominant soil reduction processes in flooded soil

Author:
Zhu, Min; Lv, Xiaofei; Franks, Ashley E.; Brookes, Philip C.; Xu, Jianming; He, Yan
Source:
Journal of hazardous materials 2020 v.386 pp. 122002
ISSN:
0304-3894
Subject:
biogeochemistry,   etc   ; Clostridium; Desulfuromonas; Dethiobacter; Methanosarcina; biochar; corn straw; dechlorination; iron; methane; pentachlorophenol; pollutants; polluted soils; remediation; soil amendments; sulfates;     Show all 16 Subjects
Abstract:
... Biochar has received increasing attention for its multifunctional applications as a soil amendment. The dual effect of biochar on reductive organic pollutants and soil biogeochemical processes under anaerobic environments in parallel has yet to be fully explored. In this study, anaerobic batch experiments were conducted to examine the effect of biochar on both reductive transformation of pentachlo ...
DOI:
10.1016/j.jhazmat.2019.122002