Variability in δ15N natural abundance of basal resources in fluvial ecosystems: a meta-analysis

2012 ◽  
Vol 31 (3) ◽  
pp. 1003-1015 ◽  
Author(s):  
Marc Peipoch ◽  
Eugènia Martí ◽  
Esperança Gacia
Keyword(s):  
Meta Analysis ◽  
Natural Abundance ◽  
Basal Resources ◽  
Δ15n Natural Abundance ◽  
Fluvial Ecosystems

δ15N natural abundance may directly disclose perturbed soil when related to C:N ratio

2013 ◽  
Vol 27 (10) ◽  
pp. 1101-1104 ◽  
Author(s):  
Franz Conen ◽  
Mikhail V. Yakutin ◽  
Nina Carle ◽  
Christine Alewell
Keyword(s):  
C:N Ratio ◽  
Natural Abundance ◽  
Δ15n Natural Abundance

Soil nitrogen status and turnover in subtropical leucaena-grass pastures as quantified by δ15N natural abundance

Geoderma ◽  
2018 ◽  
Vol 313 ◽  
pp. 126-134 ◽  
Author(s):  
Kathryn A. Conrad ◽  
Ram C. Dalal ◽  
Scott A. Dalzell ◽  
Diane E. Allen ◽  
Ryosuke Fujinuma ◽  
...  
Keyword(s):  
Soil Nitrogen ◽  
Natural Abundance ◽  
Nitrogen Status ◽  
Δ15n Natural Abundance

Long-term changes of the δ15N natural abundance of plants and soil in a temperate grassland

2009 ◽  
Vol 325 (1-2) ◽  
pp. 157-169 ◽  
Author(s):  
Melanie Kriszan ◽  
Wulf Amelung ◽  
Jürgen Schellberg ◽  
Thomas Gebbing ◽  
Walter Kühbauch
Keyword(s):  
Temperate Grassland ◽  
Natural Abundance ◽  
Long Term Changes ◽  
Δ15n Natural Abundance

scholarly journals Interspecific variation and impact of clear-cutting on natural 15N abundance and N concentration in the needle-to-soil continuum of a boreal conifer forest

2008 ◽  
Vol 53 (No. 8) ◽  
pp. 329-339 ◽  
Author(s):  
S.P. Sah ◽  
H. Ilvesniemi
Keyword(s):  
Interspecific Variation ◽  
Natural Forest ◽  
Natural Abundance ◽  
Pine Needles ◽  
Organic Layer ◽  
Clear Cut ◽  
Clear Cutting ◽  
Mature Forest ◽  
Δ15n Natural Abundance ◽  
Spruce Needles

The primary objective of this paper is to study the interspecific variation of <sup>15</sup>N natural abundance in two dominant conifer tree species, Scot pine (<i>Pinus sylvestris</i> L.) and Norway spruce (<i>Picea abies</i> L. Karst) in a N-limited mixed boreal coniferous forest in southern Finland. Both a mature tree stand (a natural forest stand) and a stand of seedlings in a clear-cut area were considered. We analyzed %N and δ15N natural abundance in needles, branches, litter and soil of the both above-mentioned stands. Pine needles had higher N concentrations than spruce needles, both in mature forest (pine = 1.09%, SE ± 0.02 and spruce = 0.79%, SE ± 0.02) and in the clear-cut area (pine = 1.01%, SE ± 0.07 and spruce = 0.74%, SE ± 0.04). Furthermore, pine needles were significantly more depleted in δ15N natural abundance than the spruce needles, both in the mature forest (pine = –5.6‰, SE ± 0.1‰ and spruce = –4.0‰, SE ± 0.2‰) and in the clear-cut sites (pine = –2.8‰, SE ± 0.2‰ and spruce = –2.1‰, SE ± 0.3‰). The more pronounced depletion of <sup>15</sup>N in the pine foliage might be connected to its different fungal associates in the roots compared to spruce roots. We assume that the mycorrhizal N-uptake is very prominent at the N-limited site. After clear-cutting, needles of the seedlings and the uppermost part of soil organic layer were found to be more 15N-enriched than at the natural forest site. This was attributed to an increased level of nitrification in the clear-cut site soil.

The effects of low-ratio n-6/n-3 PUFA on biomarkers of inflammation: a systematic review and meta-analysis

2021 ◽  
Author(s):  
Yali Wei ◽  
Yan Meng ◽  
Na Li ◽  
Qian Wang ◽  
Liyong Chen
Keyword(s):  
Systematic Review ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acid ◽  
Meta Analysis ◽  
Chain Polyunsaturated Fatty Acid ◽  
Inflammation Markers ◽  
Pufa Supplementation ◽  
Long Chain

The purpose of the systematic review and meta-analysis was to determine if low-ratio n-6/n-3 long-chain polyunsaturated fatty acid (PUFA) supplementation affects serum inflammation markers based on current studies.

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