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You searched for: Journal name Biogeochemistry Remove constraint Journal name: Biogeochemistry Publication year rev 7986-2014 Remove constraint Publication year rev: 7986-2014 Source 2014 v.121 no.2 Remove constraint Source: 2014 v.121 no.2
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1. Chronic nitrogen additions suppress decomposition and sequester soil carbon in temperate forests

Author:
S. D. Frey; S. Ollinger; K. Nadelhoffer; R. Bowden; E. Brzostek; A. Burton; B. A. Caldwell; S. Crow; C. L. Goodale; A. S. Grandy; A. Finzi; M. G. Kramer; K. Lajtha; J. LeMoine; M. Martin; W. H. McDowell; R. Minocha; J. J. Sadowsky; P. H. Templer; K. Wickings
Source:
Biogeochemistry 2014 v.121 no.2 pp. 305-316
ISSN:
0168-2563
Subject:
biosphere; carbon; carbon dioxide; carbon sequestration; carbon sinks; climate; ecosystems; emissions; forest soils; fungi; greenhouse gases; hardwood; lignin; microbial biomass; microbial communities; nitrogen; organic matter; temperate forests; trees
Abstract:
... The terrestrial biosphere sequesters up to a third of annual anthropogenic carbon dioxide emissions, offsetting a substantial portion of greenhouse gas forcing of the climate system. Although a number of factors are responsible for this terrestrial carbon sink, atmospheric nitrogen deposition contributes by enhancing tree productivity and promoting carbon storage in tree biomass. Forest soils also ...
DOI:
10.1007/s10533-014-0004-0

2. Do “hot moments” become hotter under climate change? Soil nitrogen dynamics from a climate manipulation experiment in a post-harvest forest

Author:
M. D. McDaniel; J. P. Kaye; M. W. Kaye
Source:
Biogeochemistry 2014 v.121 no.2 pp. 339-354
ISSN:
0168-2563
Subject:
harvesting; ion exchange resins; soil minerals; nitrous oxide; nitrogen; microclimate; heat; leaching; soil; climate change; temperature; forests
Abstract:
... Whole-tree forest harvest can increase soil nitrous oxide (N₂O) effluxes and leaching of nitrogen (N) from soils. These altered N dynamics are often linked to harvesting effects on microclimate, suggesting that this “hot moment” for N cycling may become hotter with climate change. We hypothesized that increases in temperature and precipitation during this post-harvest period would increase availab ...
DOI:
10.1007/s10533-014-0001-3

3. Extracellular enzyme kinetics scale with resource availability

Author:
Robert L. Sinsabaugh; Jayne Belnap; Stuart G. Findlay; Jennifer J. Follstad Shah; Brian H. Hill; Kevin A. Kuehn; Cheryl R. Kuske; Marcy E. Litvak; Noelle G. Martinez; Daryl L. Moorhead; Daniel D. Warnock
Source:
Biogeochemistry 2014 v.121 no.2 pp. 287-304
ISSN:
0168-2563
Subject:
binding sites; carbon; digestion; ecosystems; elasticities; enzymatic reactions; enzyme kinetics; habitats; homeostasis; hydrolases; metabolism; metabolomics; microbial communities; nitrogen; organic matter; oxidoreductases; phosphorus; regression analysis; stoichiometry
Abstract:
... Microbial community metabolism relies on external digestion, mediated by extracellular enzymes that break down complex organic matter into molecules small enough for cells to assimilate. We analyzed the kinetics of 40 extracellular enzymes that mediate the degradation and assimilation of carbon, nitrogen and phosphorus by diverse aquatic and terrestrial microbial communities (1160 cases). Regressi ...
DOI:
10.1007/s10533-014-0030-y

4. Long-term nitrate removal in a stream riparian zone

Author:
Alan R. Hill; Kevin J. Devito; Philippe G. Vidon
Source:
Biogeochemistry 2014 v.121 no.2 pp. 425-439
ISSN:
0168-2563
Subject:
aquifers; carbon; denitrification; floodplains; groundwater; groundwater flow; nitrates; peat; riparian areas; rivers; sand; streams
Abstract:
... The long-term capacity of riparian zones in regulating groundwater nitrate fluxes is not well understood. This study analyses patterns of nitrate removal for the period 1994–2012 at two sites in a river floodplain that have received high groundwater nitrate loading from a large upland aquifer for over 32 years. During the study, mean NO₃ ⁻–N concentrations entering the riparian zone varied between ...
DOI:
10.1007/s10533-014-0010-2

5. Process-based isotope partitioning of winter soil respiration in a subalpine ecosystem reveals importance of rhizospheric respiration

Author:
Colin L. Tucker; Jessica M. Young; David G. Williams; Kiona Ogle
Source:
Biogeochemistry 2014 v.121 no.2 pp. 389-408
ISSN:
0168-2563
Subject:
carbon; carbon dioxide; ecosystems; forests; freezing; meadows; prediction; respiratory rate; rhizosphere; roots; snow; snowpack; soil; soil respiration; spring; stable isotopes; statistical models; summer; wind; winter
Abstract:
... Deep snow in sub-alpine ecosystems may reduce or eliminate soil freezing, thus contributing to the potential for winter soil respiration to account for a significant fraction of annual CO₂ efflux to the atmosphere. Quantification of carbon loss from soils requires separation of respiration produced by roots and rhizosphere organisms from that produced by heterotrophic, decomposer organisms because ...
DOI:
10.1007/s10533-014-0008-9

6. Rocks create nitrogen hotspots and N:P heterogeneity by funnelling rain

Author:
Hans Göransson; Peter J. Edwards; Kristel Perreijn; Rienk H. Smittenberg; Harry Olde Venterink
Source:
Biogeochemistry 2014 v.121 no.2 pp. 329-338
ISSN:
0168-2563
Subject:
Agrostis gigantea; Rumex; adsorption; bags; ion exchange; niches; nitrogen; nitrogen content; nitrogen dioxide; nutrients; phosphorus; rain; rocks; soil; stoichiometry; Switzerland
Abstract:
... We postulated that soil nutrient heterogeneity arises not only through physical and biological processes in the soil, but also through emergent rocks diverting precipitation containing nutrients to the surrounding soil. To test this idea—which we call the ‘funnelling effect’ of such rocks—we placed ion-exchange resin in small boxes beside rocks and in open soil on a pristine glacial forefield site ...
DOI:
10.1007/s10533-014-0031-x

7. Similar composition but differential stability of mineral retained organic matter across four classes of clay minerals

Author:
Jonathan Sanderman; Todd Maddern; Jeffrey Baldock
Source:
Biogeochemistry 2014 v.121 no.2 pp. 409-424
ISSN:
0168-2563
Subject:
nuclear magnetic resonance spectroscopy; Eucalyptus; organic compounds; wheat; clay; soil; illite; metals; dissolved organic carbon; allophane; oxides; smectite; adsorption
Abstract:
... Adsorption of dissolved organic compounds onto mineral surfaces is increasingly recognized as a significant, if not dominant, carbon stabilisation mechanism in many soils. By utilising carbon-13 enriched dissolved organic carbon (DOC) source materials in a repeated leaching-sorption-incubation study, we show here that the biochemical composition of mineral-retained organic matter (OM) is similar a ...
DOI:
10.1007/s10533-014-0009-8

8. Spatio-temporal variations of sea surface halocarbon concentrations and fluxes from southern Yellow Sea

Author:
Gui-Peng Yang; Bin Yang; Xiao-Lan Lu; Hai-Bing Ding; Zhen He
Source:
Biogeochemistry 2014 v.121 no.2 pp. 369-388
ISSN:
0168-2563
Subject:
anthropogenic activities; chloroform; equations; rivers; spatial variation; summer; temporal variation; trichloroethylene; Yellow Sea
Abstract:
... Temporal and spatial distributions of five volatile halogenated organic compounds (VHOC), including chloroform (CHCl₃), trichloroethylene (C₂HCl₃), bromodichloromethane (CHBrCl₂), chlorodibromomethane (CHBr₂Cl), and bromoform (CHBr₃), were determined in the southern Yellow Sea (SYS) during four cruises from July 2008 to May 2009. The five VHOC distributed in the study area were affected by river i ...
DOI:
10.1007/s10533-014-0007-x

9. Testing the long-term stability of marine isoscapes in shelf seas using jellyfish tissues

Author:
K. M. MacKenzie; C. Longmore; C. Preece; C. H. Lucas; C. N. Trueman
Source:
Biogeochemistry 2014 v.121 no.2 pp. 441-454
ISSN:
0168-2563
Subject:
Scyphozoa; bones; carbon; cod (fish); ecosystems; hydrodynamics; land use change; life history; models; nitrogen; stable isotopes; trophic relationships; North Sea
Abstract:
... Maps of the spatial distribution of stable isotope ratios across wide geographic areas (isoscapes) are increasingly used to study mechanisms of nutrient flux, movements of animals, and to improve trophic information derived from stable isotope analyses. Isoscapes are usually constructed from reference samples collected from known geographic positions, a time consuming and costly process. In this s ...
DOI:
10.1007/s10533-014-0011-1

10. Controls on soil nitrification and stream nitrate export at two forested catchments

Author:
Nora J. Casson; M. Catherine Eimers; Shaun A. Watmough
Source:
Biogeochemistry 2014 v.121 no.2 pp. 355-368
ISSN:
0168-2563
Subject:
base flow; bedrock; forested watersheds; forests; leaching; melting; mineralization; nitrates; nitrification; nitrogen; nitrogen content; rain; seasonal variation; snow; soil water; spring; streams; summer; temperature; winter; Ontario
Abstract:
... Dormant season inorganic nitrogen (N) leaching varies considerably among forested catchments with similar bedrock, forest cover and deposition history. Recent work has highlighted the importance of winter rain-on-snow (ROS) events as a source of winter nitrate (NO₃-N) export, but differences among streams are likely due to differences in baseflow NO₃-N concentrations, and thus soil N processes. Th ...
DOI:
10.1007/s10533-014-0006-y

11. N₂-fixation by methanotrophs sustains carbon and nitrogen accumulation in pristine peatlands

Author:
Melanie A. Vile; R. Kelman Wieder; Tatjana Živković; Kimberli D. Scott; Dale H. Vitt; Jeremy A. Hartsock; Christine L. Iosue; James C. Quinn; Meaghan Petix; Hope M. Fillingim; Jacqueline M. A. Popma; Katherine A. Dynarski; Todd R. Jackman; Cara M. Albright; Dennis D. Wykoff
Source:
Biogeochemistry 2014 v.121 no.2 pp. 317-328
ISSN:
0168-2563
Subject:
Sphagnum; biomass production; bogs; carbon; carbon sinks; climate change; ecosystems; field experimentation; gene expression; greenhouse gases; hosts; methane production; methanotrophs; mosses and liverworts; nitrogen; peatlands; prokaryotic cells; ribosomal RNA; soil; symbiosis; Canada
Abstract:
... Symbiotic relationships between N₂-fixing prokaryotes and their autotrophic hosts are essential in nitrogen (N)-limited ecosystems, yet the importance of this association in pristine boreal peatlands, which store 25 % of the world’s soil (C), has been overlooked. External inputs of N to bogs are predominantly atmospheric, and given that regions of boreal Canada anchor some of the lowest rates foun ...
DOI:
10.1007/s10533-014-0019-6