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: Journal name Biogeochemistry Remove constraint Journal name: Biogeochemistry Subject term biogeochemistry Remove constraint Subject term: biogeochemistry
Start Over

Search

578  Search Results

« Previous | 1 - 20 of 578 |
Number of results to display per page

Search Results

1. Further investigations into the use of tree rings as archives of atmospheric mercury concentrations

Author:
Mae Sexauer Gustin; Benjamin Ingle; Sarrah M. Dunham-Cheatham
Source:
Biogeochemistry 2022 v.158 no.2 pp. 167-180
ISSN:
0168-2563
Subject:
Pinus; air; biogeochemistry; dewpoint; growth rings; mercury; mountains; relative humidity; temperature; trees; California
Abstract:
... Because there are limited locations where atmospheric mercury (Hg) measurements are made, a method is needed for characterizing air concentrations locally, regionally and globally. Research has shown growth rings of some tree species may be used as archives that record concentrations of gaseous elemental Hg. However, there are still questions regarding the most appropriate sampling method(s), whic ...
DOI:
10.1007/s10533-022-00892-1

2. Potentiometric redox measurements in the environment: a novel perspective on method powers and limitations

Author:
David Yalin; Moshe Shenker
Source:
Biogeochemistry 2022 v.158 no.3 pp. 327-343
ISSN:
0168-2563
Subject:
biogeochemistry; orchards; oxygen; slurries; soil
Abstract:
... A decades-long debate exists regarding the possibility of quantifying the redox state of ecosystems using potentiometric redox measurements (PRM). Currently, evidence of non-Nernstian response and poor reproducibility, have led many to regard PRM as a qualitative measure. Here we aim to re-open this debate by shedding light on the reproducibility of PRM in soil systems and in controlled lab experi ...
DOI:
10.1007/s10533-022-00901-3

3. Quantifying biological processes producing nitrous oxide in soil using a mechanistic model

Author:
Baoxuan Chang; Zhifeng Yan; Xiaotang Ju; Xiaotong Song; Yawei Li; Siliang Li; Pingqing Fu; Xia Zhu-Barker
Source:
Biogeochemistry 2022 v.159 no.1 pp. 1-14
ISSN:
0168-2563
Subject:
biogeochemistry; climate change; denitrification; greenhouse gases; mechanistic models; nitrification; nitrous oxide; oxygen
Abstract:
... Soil nitrous oxide (N₂O) is an important greenhouse gas contributing to climate change. Many processes produce N₂O in soil and the production rate of each process is affected by climatic-edaphic factors, making the soil-to-atmosphere N₂O flux extremely dynamic. Experimental approaches, including natural and enriched isotopic methods, have been developed to separate and quantify the N₂O production ...
DOI:
10.1007/s10533-022-00912-0

4. Shifts in microbial stoichiometry upon nutrient addition do not capture growth-limiting nutrients for soil microorganisms in two subtropical soils

Author:
Christoph Rosinger; Katharina M. Keiblinger; Johannes Rousk; Hans Sandén
Source:
Biogeochemistry 2022 v.159 no.1 pp. 33-43
ISSN:
0168-2563
Subject:
biogeochemistry; community structure; enzymes; forest soils; grassland soils; grasslands; microbial biomass; microbial communities; microbial growth; stoichiometry
Abstract:
... Microbial stoichiometry has become a key aspect in ecological research as shifts in microbial C:N, C:P and N:P ratios upon nutrient addition are presumed to give insight into relative nutrient limitations for soil microorganisms–with far-reaching implications for biogeochemical processes. However, this expectation has never been tested against direct methods of microbial growth responses to nutrie ...
DOI:
10.1007/s10533-022-00911-1

5. Spatial and temporal patterns of urea content in a eutrophic stream continuum on the Northern Great Plains

Author:
Vanessa J. Swarbrick; Nathanael T. Bergbusch; Peter R. Leavitt
Source:
Biogeochemistry 2022 v.157 no.2 pp. 171-191
ISSN:
0168-2563
Subject:
Fabaceae; biogeochemistry; eutrophication; exports; forage; hyporheic zone; landscapes; lotic systems; nutrient content; oilseeds; phytoplankton; spring; streams; summer; temperature; temporal variation; toxicity; transportation; urea; water quality
Abstract:
... Urea can degrade water quality and stimulate toxic phytoplankton in P-rich lakes, yet little is known of its sources, abundance, or transportation in lotic systems, particularly within the Northern Great Plains. We measured physico-chemical parameters biweekly during May–September 2010–2012 at 16 stations along a 250 km lotic continuum to quantify spatial and temporal variation in urea concentrati ...
DOI:
10.1007/s10533-021-00868-7

6. A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity–ecosystem function relationships

Author:
Jessica G. Ernakovich; Jeff Baldock; Courtney Creamer; Jonathan Sanderman; Karsten Kalbitz; Mark Farrell
Source:
Biogeochemistry 2021 v.153 no.1 pp. 1-15
ISSN:
0168-2563
Subject:
biogeochemistry; carbon dioxide; detritus; ecosystems; forest soils; land cover; microbial communities; microbial physiology; mineralization; nuclear magnetic resonance spectroscopy; pastures; soil organic carbon; soil structure; species richness; stable isotopes
Abstract:
... While soil organic carbon (C) is the foundation of productive and healthy ecosystems, the impact of the ecology of microorganisms on C-cycling remains unknown. We manipulated the diversity, applied here as species richness, of the microbial community present in similar soils on two contrasting land-covers—an adjacent pasture and forest—and observed the transformations of plant detritus and soil or ...
DOI:
10.1007/s10533-020-00736-w

7. Assessing thermal acclimation of soil microbial respiration using macromolecular rate theory

Author:
Charlotte J. Alster; Jasmine M. Robinson; Vickery L. Arcus; Louis A. Schipper
Source:
Biogeochemistry 2022 v.158 no.1 pp. 131-141
ISSN:
0168-2563
Subject:
acclimation; biogeochemistry; carbon; heat; soil; soil carbon; soil respiration; temperature
Abstract:
... Soil heterotrophic respiration is strongly controlled by temperature. Thus, understanding how soil microbial respiration will acclimate to global warming is important for accurate predictions of soil carbon loss. Thermal acclimation of soil respiration has typically been measured using the Q₁₀ temperature coefficient or comparing absolute rates of respiration with varying conclusions. Discrepancie ...
DOI:
10.1007/s10533-021-00885-6

8. Bark controls tree branch-leached dissolved organic matter production and bioavailability in a subtropical forest

Author:
Jia-Wen Xu; Na Yang; Fu-Xi Shi; Yun Zhang; Songze Wan; Rong Mao
Source:
Biogeochemistry 2022 v.158 no.3 pp. 345-355
ISSN:
0168-2563
Subject:
bark; bioavailability; biogeochemistry; broadleaved trees; debarking; dissolved organic carbon; total nitrogen; total phosphorus; tropical forests; China
Abstract:
... Bark is an essential component of tree branches, yet its role in controlling branch-leached dissolved organic matter (DOM) characteristics remains unknown in forests. Here, we collected branches (about 1.5 cm in diameter) of two evergreen coniferous trees, two deciduous broadleaf trees, and three evergreen broadleaf trees from a subtropical forest in southern China, and subsequently used a bark re ...
DOI:
10.1007/s10533-022-00902-2

9. Beyond total carbon: conversion of amazon forest to pasture alters indicators of soil C cycling

Author:
Ademir Durrer; Andrew J. Margenot; Lucas C. R. Silva; Brendan J. M. Bohannan; Klaus Nusslein; Joost van Haren; Fernando D. Andreote; Sanjai J. Parikh; Jorge L. Mazza Rodrigues
Source:
Biogeochemistry 2021 v.152 no.2-3 pp. 179-194
ISSN:
0168-2563
Subject:
basins; biogeochemistry; chronosequences; deforestation; enzyme activity; forest succession; land use change; pastures; reflectance; secondary forests; soil organic carbon; soil quality; topsoil; Amazonia
Abstract:
... It is well established that land use change (LUC) can impact soil organic carbon (SOC) in tropical regions, but the long-term effects of LUC on soil quality and C cycling remain unclear. Here, we evaluated how LUC affects soil C cycling in the Amazon region using a 100-year observational chronosequence spanning primary forest-to-pasture conversion and subsequent secondary forest succession. We fou ...
DOI:
10.1007/s10533-020-00743-x

10. Biogeochemical feedbacks may amplify ongoing and future ocean deoxygenation: a case study from the Peruvian oxygen minimum zone

Author:
Klaus Wallmann; Yonss S. José; Mark J. Hopwood; Christopher J. Somes; Andrew W. Dale; Florian Scholz; Eric P. Achterberg; Andreas Oschlies
Source:
Biogeochemistry 2022 v.159 no.1 pp. 45-67
ISSN:
0168-2563
Subject:
ammonium; biogeochemistry; case studies; fish; fisheries; iron; models; nitrogen fixation; organic nitrogen; oxidation; oxygen; phytoplankton; primary productivity; sulfides; toxicity
Abstract:
... A new box model is employed to simulate the oxygen-dependent cycling of nutrients in the Peruvian oxygen minimum zone (OMZ). Model results and data for the present state of the OMZ indicate that dissolved iron is the limiting nutrient for primary production and is provided by the release of dissolved ferrous iron from shelf and slope sediments. Most of the removal of reactive nitrogen occurs by an ...
DOI:
10.1007/s10533-022-00908-w

11. Biogeochemistry of selenium compounds in the water column of warm monomictic Lake Kinneret

Author:
Y. Be’eri-Shlevin; M. Bueno; E. Tessier; A. Romero-Rama; A. Sukenik; T. Zohary; D. Amouroux
Source:
Biogeochemistry 2022 v.157 no.3 pp. 291-311
ISSN:
0168-2563
Subject:
biogeochemistry; chlorophyll; estuaries; inventories; lakes; phytoplankton; primary productivity; seasonal variation; selenium; spatial distribution; spring; summer; volatilization; Israel
Abstract:
... The biogeochemistry of dissolved selenium (Se) was investigated over 3 years (2015–2017) in the subtropical, warm monomictic and meso-eutrophic Lake Kinneret (Sea of Galilee, Israel). We monitored seasonal variation and vertical distribution of dissolved total Se (T.Se), inorganic oxyanions (Se(IV) & Se(VI)), reduced Se fraction (Red.Se), organic (Org.Se) and volatile Se compounds. T.Se varied bet ...
DOI:
10.1007/s10533-021-00877-6

12. Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks

Author:
Anna Neubeck; Magnus Ivarsson; Curt Broman; Jonathan Lima-Zaloumis; Wolfgang Bach; Martin Whitehouse
Source:
Biogeochemistry 2021 v.154 no.3 pp. 525-536
ISSN:
0168-2563
Subject:
Raman spectroscopy; biogeochemistry; carbon; carbonates; manganese; mass spectrometry; microbial activity
Abstract:
... Micrometer sized stromatolitic structures called Frutexites are features observed in samples from the deep subsurface, and hot-spring environments. These structures are comprised of fine laminations, columnar morphology, and commonly consist of iron oxides, manganese oxides, and/or carbonates. Although a biological origin is commonly invoked, few reports have shown direct evidence of their associa ...
DOI:
10.1007/s10533-021-00806-7

13. Contribution of invasive bivalves (Dreissena spp.) to element distribution: phase interaction, regional and seasonal comparison in a large shallow lake

Author:
Csilla Balogh; Jarosław Kobak; Zsófia Kovács; József Serfőző; Nóra Faragó; Zoltán Serfőző
Source:
Biogeochemistry 2022 v.158 no.1 pp. 91-111
ISSN:
0168-2563
Subject:
Dreissena; autumn; basins; biochemical pathways; biogeochemistry; biomarkers; ecosystems; lakes; metallothionein; mussels; organic matter; peptides; seasonal variation; sediments; shorelines; spring; tissues; urbanization; Central European region
Abstract:
... After introduction, the invasive bivalve dreissenids became key species in the biota of Lake Balaton, the largest shallow lake in Central Europe. The contribution of dreissenid soft tissue and shell, as biotic phases, in element distribution and its interaction with the water and upper sediment phases were examined in two basins with different trophic conditions in spring and autumn. Six metals (B ...
DOI:
10.1007/s10533-022-00887-y

14. Decomposition of carbon adsorbed on iron (III)-treated clays and their effect on the stability of soil organic carbon and external carbon inputs

Author:
Mengyang You; Xia Zhu-Barker; Timothy A. Doane; William R. Horwath
Source:
Biogeochemistry 2022 v.157 no.2 pp. 259-271
ISSN:
0168-2563
Subject:
Lolium; Luvisols; adsorption; biogeochemistry; carbon dioxide; clay; dissolved organic carbon; iron; kaolinite; mineralization; montmorillonite; plant residues; soil organic carbon
Abstract:
... The interaction of organic carbon (OC) with clay and metals stabilizes soil carbon (C), but the influence of specific clay-metal-OC assemblages (flocs) needs further evaluation. This study aimed to investigate the stability of flocs in soil as affected by external C inputs. Flocs representing OC-mineral soil fractions were synthesized using dissolved organic C (DOC) combined with kaolinite (1:1 la ...
DOI:
10.1007/s10533-021-00873-w

15. Divergent controls on carbon concentration and persistence between forests and grasslands of the conterminous US

Author:
K. A. Heckman; L. E. Nave; M. Bowman; A. Gallo; J. A. Hatten; L. M. Matosziuk; A. R. Possinger; M. SanClements; B. D. Strahm; T. L. Weiglein; C. Rasmussen; C. W. Swanston
Source:
Biogeochemistry 2021 v.156 no.1 pp. 41-56
ISSN:
0168-2563
Subject:
biogeochemistry; carbonates; exchangeable calcium; soil organic carbon; soil pH
Abstract:
... Variation in soil organic C (%OC) concentration has been associated with the concentration of reactive Fe- and Al-oxyhydroxide phases and exchangeable Ca, with the relative importance of these two stabilizing components shifting as soil pH moves from acid to alkaline. However, it is currently unknown if this pattern is similar or different with regard to measures of soil C persistence. We sampled ...
DOI:
10.1007/s10533-020-00725-z

16. Divergent roles of iron and aluminum in sediment organic matter association at the terrestrial–aquatic interface

Author:
Kai Nils Nitzsche; Zachary E. Kayler; Katrin Premke; Arthur Gessler; Rota Wagai
Source:
Biogeochemistry 2022 v.157 no.3 pp. 355-378
ISSN:
0168-2563
Subject:
aluminum; ascorbic acid; biogeochemistry; carbon nitrogen ratio; iron; ligands; organic matter; pH; sediments; Germany
Abstract:
... Organic matter (OM) can be protected from abiotic and biotic breakdown via its association with iron (Fe) and aluminum (Al) in both terrestrial and aquatic ecosystems. We hypothesized that the natural variation in sediment redox and pH regime govern how the two metals interact with OM in near-surface mineral sediments of 40 kettle holes of varying hydroperiod in NE Germany. Sediments were separate ...
DOI:
10.1007/s10533-021-00878-5

17. Drivers of greenhouse gas emissions from standing dead trees in ghost forests

Author:
Melinda Martinez; Marcelo Ardón
Source:
Biogeochemistry 2021 v.154 no.3 pp. 471-488
ISSN:
0168-2563
Subject:
biogeochemistry; carbon; coasts; ecosystems; freshwater; greenhouse gases; greenhouses; marshes; salinity; soil; trees; North Carolina
Abstract:
... Coastal freshwater forested wetlands are rapidly transitioning from forest to marsh, leaving behind many standing dead trees (snags) in areas often called ‘ghost forests’. Snags can act as conduits for soil produced greenhouse gases (GHG) and can also be sources as they decompose. Thus, snags have the potential to contribute GHGs to the atmosphere, but emissions are not well understood. We assesse ...
DOI:
10.1007/s10533-021-00797-5

18. Effectiveness of phosphorus control under extreme heatwaves: implications for sediment nutrient releases and greenhouse gas emissions

Author:
Qing Zhan; Cleo N. Stratmann; Harm G. van der Geest; Annelies J. Veraart; Kristof Brenzinger; Miquel Lürling; Lisette N. de Senerpont Domis
Source:
Biogeochemistry 2021 v.156 no.3 pp. 421-436
ISSN:
0168-2563
Subject:
algae; ammonium; bentonite; biogeochemistry; carbon dioxide; climate; eutrophication; fish; greenhouse gases; mineralization; nitrification; nitrogen; nitrous oxide; oxidation; phosphorus; sediments; temperature; water quality; watershed management
Abstract:
... Eutrophication has been identified as the primary cause of water quality deterioration in inland waters worldwide, often associated with algal blooms or fish kills. Eutrophication can be controlled through watershed management and in-lake measures. An extreme heatwave event, through its impact on mineralization rates and internal nutrient loading (phosphorus—P, and nitrogen—N), could counteract eu ...
DOI:
10.1007/s10533-021-00854-z

19. Elevated salinity and water table drawdown significantly affect greenhouse gas emissions in soils from contrasting land-use practices in the prairie pothole region

Author:
Shayeb Shahariar; Richard Farrell; Raju Soolanayakanahally; Angela Bedard-Haughn
Source:
Biogeochemistry 2021 v.155 no.1 pp. 127-146
ISSN:
0168-2563
Subject:
annuals; biogeochemistry; carbon dioxide; climate; drawdown; greenhouse gases; groundwater; land use; pastures; soil water; water salinity; water table; Prairie Pothole region
Abstract:
... Land-use practices can alter shallow groundwater and salinity, further impacting greenhouse gas (GHG) emissions, particularly in the hydrologically dynamic riparian zones of wetlands. Emissions of CO₂, CH₄, and N₂O were estimated in soil cores collected from two prairie pothole region (PPR) sites with three adjacent land-use practices (i.e., annual crop = AC, pasture = PA, and short rotation willo ...
DOI:
10.1007/s10533-021-00818-3

20. Increased soil-derived N2O production following a simulated fall-freeze–thaw cycle: effects of fall urea addition, soil moisture, and history of manure applications

Author:
Sisi Lin; Guillermo Hernandez-Ramirez
Source:
Biogeochemistry 2022 v.157 no.3 pp. 379-398
ISSN:
0168-2563
Subject:
biogeochemistry; denitrification; freeze-thaw cycles; nitrogen; nitrous oxide; nitrous oxide production; soil water; urea
Abstract:
... Adding nitrogen fertilizers to soils can induce short-term changes in soil N pools, and consequently cause extra release of nitrous oxide (N₂O) emissions that are sourced directly from soils rather than from added N – a response termed the ‘priming effect’. However, it is unknown how priming effects on nitrous oxide (N₂O) emissions can be altered following a strong freeze–thaw cycle. A mesocosm (p ...
DOI:
10.1007/s10533-021-00880-x