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1. 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

2. Heterotrophic bacterial production measured on soil microaggregates sampled using a Biological Laser Printer

Author:
Montgomery, Michael T.; Fulmer, Preston A.; Gaston, Joel D.; Pirlo, Russell K.; Ringeisen, Bradley R.
Source:
Soil biology & biochemistry 2019 v.131 pp. 176-181
ISSN:
0038-0717
Subject:
biogeochemistry,   etc   ; climate change; metabolism; microaggregates; rain; terrestrial ecosystems;     Show all 6 Subjects
Abstract:
... Although routinely measured in aquatic systems over the last 30 years, heterotrophic bacterial production (3H-leucine method) has only more recently been measured in terrestrial ecosystems to elucidate the role of soil biogeochemical processes in global carbon cycles and climate change. Studying bacterial metabolism at the microaggregate scale (100–300 μm) may unmask important microscale biogeoche ...
DOI:
10.1016/j.soilbio.2019.01.003

3. Parallel implementation of a data assimilation scheme for operational oceanography: The case of the MedBFM model system

Author:
Teruzzi, A.; Di Cerbo, P.; Cossarini, G.; Pascolo, E.; Salon, S.
Source:
Computers & geosciences 2019 v.124 pp. 103-114
ISSN:
0098-3004
Subject:
biogeochemistry,   etc   ; algorithms; compliance; computer software; computers; models; oceanography; Mediterranean Sea;     Show all 8 Subjects
Abstract:
... The MedBFM model system provides forecasts and reanalysis of the Mediterranean Sea biogeochemistry for the European Copernicus Services. The system integrates model and observations through a 3D variational assimilation scheme, whose performance capitalizes on present HPC systems and ensures compliance with the service requirements. Domain decomposition with message passing paradigm was implemente ...
DOI:
10.1016/j.cageo.2019.01.003

4. Introducing the Atacama Desert

Author:
Bull, Alan T.; Andrews, Barbara A.; Dorador, Cristina; Goodfellow, Michael
Source:
Antonie van Leeuwenhoek 2018 v.111 no.8 pp. 1269-1272
ISSN:
0003-6072
Subject:
biogeochemistry,   etc   ; applied research; ecology; microbiology;     Show all 4 Subjects
Abstract:
... This brief introduction is intended to orientate the reader with respect to the principal environmental and historical features of the Atacama Desert, the oldest and continuously driest non-polar temperate desert on Earth. Exploration of its microbiology is relatively recent but both fundamental and applied research activities have grown dramatically in recent years reflecting the substantial inte ...
DOI:
10.1007/s10482-018-1100-2

5. The potential of biomarker proxies to trace climate, vegetation, and biogeochemical processes in peat: A review

Author:
Naafs, B.D.A.; Inglis, G.N.; Blewett, J.; McClymont, E.L.; Lauretano, V.; Xie, S.; Evershed, R.P.; Pancost, R.D.
Source:
Global and planetary change 2019 v.179 pp. 57-79
ISSN:
0921-8181
Subject:
biogeochemistry,   etc   ; biomarkers; climate; environmental factors; fossils; lignite; microorganisms; pH; paleoecology; peat; temperature; vegetation;     Show all 12 Subjects
Abstract:
... Molecular fossils (biomarkers) are abundant in organic rich natural archives such as peats and lignites (fossilized peat), where their distribution is governed by their biological source, environmental factors, such as temperature and pH, and diagenetic reactions. As a result, biomarkers in peat have become an important tool to study past variations in vegetation, environment and climate in terres ...
DOI:
10.1016/j.gloplacha.2019.05.006

6. Prediction of soil thicknesses in a headwater hillslope with constrained sampling data

Author:
Liu, Jintao; Han, Xiaole; Chen, Xi; He, Ruimin; Wu, Pengfei
Source:
Catena 2019 v.177 pp. 101-113
ISSN:
0341-8162
Subject:
biogeochemistry,   etc   ; data collection; diffusivity; highlands; linear models; prediction; soil depth; topographic slope; water; watersheds; China;     Show all 11 Subjects
Abstract:
... The spatial distribution of soil thickness plays a critical role in upland hydrological and biogeochemical processes. Process-based models are thought to have great potentials for predicting soil thickness. However, applications of process-based approaches have been greatly limited by parameter estimation, which typically requires specialized laboratories. In this study, on the basis of field work ...
DOI:
10.1016/j.catena.2019.02.009

7. A simulation of the seasonal variation of decabromodiphenyl ether in a bay adjacent to the Yellow Sea

Author:
Wang, Aobo; Guo, Xinyu; Shi, Jie; Luo, Chongxin; Gao, Huiwang
Source:
The Science of the total environment 2019 v.664 pp. 522-535
ISSN:
0048-9697
Subject:
biogeochemistry,   etc   ; advection; biomass; models; mortality; particulates; phytoplankton; rivers; seasonal variation; seawater; summer; water temperature; Yellow Sea;     Show all 13 Subjects
Abstract:
... A three-dimensional transport-ecosystem-POP coupled model is configured to simulate the seasonal variation and budget of decabromodiphenyl ether (BDE-209) in a semi-enclosed bay adjacent to the Yellow Sea. The model includes five types of BDE-209 (gaseous, dissolved, phytoplankton-bound, detritus-bound, and suspended particulate matter (SPM)-bound) and related physical and biogeochemical processes ...
DOI:
10.1016/j.scitotenv.2019.01.385

8. Deriving inherent optical properties from decomposition of hyperspectral non-water absorption

Author:
Grunert, Brice K.; Mouw, Colleen B.; Ciochetto, Audrey B.
Source:
Remote sensing of environment 2019 v.225 pp. 193-206
ISSN:
0034-4257
Subject:
biogeochemistry,   etc   ; absorption; algorithms; color; models; phytoplankton; reflectance; remote sensing; satellites; spectral analysis; uncertainty;     Show all 11 Subjects
Abstract:
... Semi-analytical algorithms (SAAs) developed for multispectral ocean color sensors have benefited from a variety of approaches for retrieving the magnitude and spectral shape of inherent optical properties (IOPs). SAAs generally follow two approaches: 1) simultaneous retrieval of all IOPs, resulting in pre-defined bio-optical models and spectral dependence between IOPs and 2) retrieval of bulk IOPs ...
DOI:
10.1016/j.rse.2019.03.004

9. Effect of nitrogen addition on the decomposition and release of compounds from fine roots with different diameters: the importance of initial substrate chemistry

Author:
Jing, Hang; Zhang, Peng; Li, Jingjing; Yao, Xu; Liu, Guobin; Wang, Guoliang
Source:
Plant and soil 2019 v.438 no.1-2 pp. 281-296
ISSN:
0032-079X
Subject:
biogeochemistry,   etc   ; Pinus tabuliformis; carbon; cellulose; fine roots; forest ecosystems; lignin; nitrogen; phosphorus; physicochemical properties; starch;     Show all 11 Subjects
Abstract:
... AIMS: Initial substrate chemical characteristics are the most important factor in the regulation of fine root decomposition. However, it remains unclear how nitrogen (N) deposition changes the decomposition process by affecting initial substrate chemical characteristics with different fine root diameter sizes. METHODS: We compared the root decomposition processes across three diameter sizes (very ...
DOI:
10.1007/s11104-019-04017-w

10. Modeling electrokinetic transport and biogeochemical reactions in porous media: A multidimensional Nernst–Planck–Poisson approach with PHREEQC coupling

Author:
Sprocati, Riccardo; Masi, Matteo; Muniruzzaman, Muhammad; Rolle, Massimo
Source:
Advances in water resources 2019 v.127 pp. 134-147
ISSN:
0309-1708
Subject:
biogeochemistry,   etc   ; computer software; electroosmosis; electrostatic interactions; engineering; mathematical models; porous media; solutes; water resources;     Show all 9 Subjects
Abstract:
... Electrokinetic techniques (EK) have been proposed and applied in different fields of science and engineering to enhance solute transport and species mobility in subsurface porous media. Modeling of EK requires a comprehensive approach allowing the description of the complex interplay between physical, chemical and biogeochemical processes occurring in EK applications. We propose a multidimensional ...
DOI:
10.1016/j.advwatres.2019.03.011

11. Identification and mapping of riverbed sediment facies in the Columbia River through integration of field observations and numerical simulations

Author:
Hou, Zhangshuan; Scheibe, Timothy D.; Murray, Christopher J.; Perkins, William A.; Arntzen, Evan V.; Ren, Huiying; Mackley, Robert D.; Richmond, Marshall C.
Source:
Hydrological processes 2019 v.33 no.8 pp. 1245-1259
ISSN:
0885-6087
Subject:
biogeochemistry,   etc   ; alluvium; aquifers; groundwater; hydrodynamics; mathematical models; rivers; stream channels; surface water; texture; Columbia River;     Show all 11 Subjects
Abstract:
... In the Hanford Reach of the Columbia River, a thin layer of recent alluvium overlies the sedimentary formations that comprise the unconfined groundwater aquifer. Experimental and modelling studies have demonstrated that this alluvial layer exerts significant control on the exchange of groundwater and surface water (hydrologic exchange flux), and is associated with elevated levels of biogeochemical ...
DOI:
10.1002/hyp.13396

12. Interactions of trace elements and organic ligands in seawater and implications for quantifying biogeochemical dynamics: A review

Author:
Zhang, Jing; Kattner, Gerhard; Koch, Boris P.
Source:
Earth-science reviews 2019
ISSN:
0012-8252
Subject:
biogeochemistry,   etc   ; climate; climate change; ligands; mathematical models; organic matter; primary productivity; seawater; surface water; trace elements;     Show all 10 Subjects
Abstract:
... Interactions between dissolved trace elements and organic ligands in seawater play an important role in ocean biogeochemistry, ranging from regulating primary production in surface waters to element cycling on basin-wide scale, with strong feedbacks to climate variability. In this study, we review different aspects in the field of marine trace elements and their organic ligands: recent instrumenta ...
DOI:
10.1016/j.earscirev.2019.03.007

13. Trends in ecology: shifts in ecological research themes over the past four decades

Author:
McCallen, Emily; Knott, Jonathan; Nunez‐Mir, Gabriela; Taylor, Benjamin; Jo, Insu; Fei, Songlin
Source:
Frontiers in ecology and the environment 2019 v.17 no.2 pp. 109-116
ISSN:
1540-9295
Subject:
biogeochemistry,   etc   ; artificial intelligence; automation; funding; genetics; issues and policy; microbial ecology;     Show all 7 Subjects
Abstract:
... As ecology enters a critical era, more comprehensive studies are needed to improve our understanding of the key themes, major trends, and potential gaps within the discipline. However, as the number of published scientific papers continues to grow, tracking the ever‐expanding body of work becomes increasingly challenging. To identify trends in ecological research, we used recently developed machin ...
DOI:
10.1002/fee.1993

14. Impact of drill core contamination on compound-specific carbon and hydrogen isotopic signatures

Author:
Schinteie, Richard; Colangelo-Lillis, Jesse R.; Hope, Janet M.; Chen, Junhong; Nelson, Daniel B.; Jarrett, Amber J.M.; Brocks, Jochen J.
Source:
Organic geochemistry 2019 v.128 pp. 161-171
ISSN:
0146-6380
Subject:
biogeochemistry,   etc   ; Precambrian time; alkanes; carbon; hydrogen; mixing; organic matter; provenance; stable isotopes;     Show all 9 Subjects
Abstract:
... Compound-specific carbon and hydrogen isotope ratios are routinely measured on extractable organic matter to decipher biogeochemical processes and events in Earth history. To deliver accurate interpretations, it is paramount that isotopic values are derived from indigenous compounds and are not the result of contamination. However, distinguishing between compounds from these different provenances ...
DOI:
10.1016/j.orggeochem.2019.01.003

15. Non-redfieldian mesopelagic nutrient remineralization in the eastern North Atlantic subtropical gyre

Author:
Fernández-Castro, Bieito; Mouriño-Carballido, Beatriz; Álvarez-Salgado, Xosé Antón
Source:
Progress in oceanography 2019 v.171 pp. 136-153
ISSN:
0079-6611
Subject:
biogeochemistry,   etc   ; autotrophs; models; nitrates; nitrogen; nutrients; oceans; organic carbon; oxygen; phosphates; phosphorus; surface water;     Show all 12 Subjects
Abstract:
... The eastern boundary of the North Atlantic subtropical gyre (NASTG) receives organic materials produced in the nearby Canary upwelling system (CanUS), which has important implications for the metabolic balance of the region. Here we computed absolute geostrophic, Ekman and eddy diffusive transports and net budgets of oxygen, nitrate, and phosphate, with an inverse model applied to annual climatolo ...
DOI:
10.1016/j.pocean.2018.12.001

16. On the separation between inorganic and organic fractions of suspended matter in a marine coastal environment

Author:
Schartau, M.; Riethmüller, R.; Flöser, G.; van Beusekom, J.E.E.; Krasemann, H.; Hofmeister, R.; Wirtz, K.
Source:
Progress in oceanography 2019 v.171 pp. 231-250
ISSN:
0079-6611
Subject:
biogeochemistry,   etc   ; coasts; estuaries; littoral zone; models; nutrients; particulate organic matter; particulates; spatial data; North Sea;     Show all 10 Subjects
Abstract:
... A central aspect of coastal biogeochemistry is to determine how nutrients, lithogenic and organic matter are distributed and transformed within coastal and estuarine environments. Analyses of the spatio-temporal changes of total suspended matter (TSM) concentration indicate strong and variable linkages between intertidal fringes and pelagic regions. In particular, knowledge about the organic fract ...
DOI:
10.1016/j.pocean.2018.12.011

17. The effect of the physicochemical conditions variations on the behavior of heavy metals trapped in polluted fluvial system sediments: the case of Oued Sebou, Morocco

Author:
Hassimi, H.; Taleb, A.; Bouezmarni, M.; Karzazi, O.; Taleb, M.; Kherbeche, A.; Debbaut, V.
Source:
Applied water science 2019 v.9 no.1 pp. 17
ISSN:
2190-5487
Subject:
biogeochemistry,   etc   ; chromium; heavy metals; human health; iron; manganese; physicochemical properties; risk; rivers; sediments; Morocco;     Show all 11 Subjects
Abstract:
... This study was an attempt to understand the factors influencing the heavy metal distribution in polluted fluvial system sediments. Various biogeochemical processes and anthropogenic factors were playing an important role in altering the concentration of heavy metals in the sediments. This paper has two objectives: The first one is to investigate the effect of the variation in the physicochemical c ...
DOI:
10.1007/s13201-019-0891-2

18. The response of metabolically active Clostridium community to initial pH shift is closely correlated with microbial Fe(III) reduction in flooded paddy soils

Author:
Li, Lina; Qu, Zhi; Wang, Baoli; Jia, Rong; Qu, Dong
Source:
Journal of soils and sediments 2019 v.19 no.2 pp. 522-532
ISSN:
1439-0108
Subject:
biogeochemistry,   etc   ; Clostridium; hydrogen; hydrogen production; iron; microorganisms; paddy soils; soil pH;     Show all 8 Subjects
Abstract:
... PURPOSE: Soil pH could be greatly affected by agriculture practices in paddy soils, in which microbial Fe(III) reduction is a prevalent and important biogeochemical process. There is increasing evidence that microbial fermentative processes can play an important role in Fe(III) reduction. In this study, the response of metabolically active Clostridium community to initial pH adjustment was investi ...
DOI:
10.1007/s11368-018-2053-9

19. Towards a global model for wetlands ecosystem services

Author:
Janse, Jan H.; van Dam, Anne A.; Hes, Edwin M.A.; de Klein, Jeroen J.M.; Finlayson, C. Max; Janssen, Annette B.G.; van Wijk, Dianneke; Mooij, Wolf M.; Verhoeven, Jos T.A.
Source:
Current opinion in environmental sustainability 2019 v.36 pp. 11-19
ISSN:
1877-3435
Subject:
biogeochemistry,   etc   ; biodiversity; climate; climate change; climate models; databases; ecosystem services; hydrology; land use change; vegetation; wetlands;     Show all 11 Subjects
Abstract:
... Wetlands play an important role in the provision of important ecosystem services like the provision of clean water to the world, adaptation to climate change, and support for biodiversity; although they are sometimes also associated with adverse climate effects. Wetlands are, however, currently grossly underrepresented in global environmental models. In this paper, we explore the required function ...
DOI:
10.1016/j.cosust.2018.09.002

20. Novel fluid–fluid interface domains in geologic media

Author:
Araújo, Juliana B.; Brusseau, Mark L.
Source:
Environmental science 2019 v.21 no.1 pp. 145-154
ISSN:
2050-7895
Subject:
biogeochemistry,   etc   ; environmental science; liquid-air interface; micro-computed tomography; models; processing technology; sand; soil;     Show all 8 Subjects
Abstract:
... Pore-scale fluid processes in geological media are critical for numerous applications in several fields. Continued improvement of high-resolution image acquisition and processing methods has provided a means to directly characterize pore-scale fluid processes for natural geomedia, and to test the representativeness of theoretical and computational models developed to simulate them. High-resolution ...
DOI:
10.1039/c8em00343b