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1. Calcium carbonate in termite galleries - biomineralization or upward transport

Author:
Liu, X.; Monger, H. C.; Whitford, W. G.
Source:
Biogeochemistry 2007 v.82 no.3 pp. 241-250
ISSN:
0168-2563
Subject:
C3 plants,   etc   ; C4 plants; Isoptera; X-radiation; X-ray diffraction; biomineralization; calcite; calcium carbonate; carbon; carbon dioxide; carbon sequestration; digestive system; methane production; opal; organic matter; scanning electron microscopy; semiarid soils; stable isotopes;     Show all 18 Subjects
Abstract:
... Termites and soil calcium carbonate are major factors in the global carbon cycle: termites by their role in decomposition of organic matter and methane production, and soil calcium carbonate by its storage of atmospheric carbon dioxide. In arid and semiarid soils, these two factors potentially come together by means of biomineralization of calcium carbonate by termites. In this study, we evaluated ...
DOI:
10.1007/s10533-006-9067-x

2. Density fractionation and ¹³C reveal changes in soil carbon following woody encroachment in a desert ecosystem

Author:
Throop, Heather L.; Lajtha, Kate; Kramer, Marc
Source:
Biogeochemistry 2013 v.112 no.1-3 pp. 409-422
ISSN:
0168-2563
Subject:
C3 plants,   etc   ; C4 plants; Larrea tridentata; Prosopis; arid lands; carbon; carbon sinks; carbonates; ecological invasion; ecosystems; fractionation; grassland soils; grasslands; land cover; models; organic matter; shrubs; soil nutrient dynamics; stable isotopes; Chihuahuan Desert;     Show all 20 Subjects
Abstract:
... Woody encroachment has dramatically changed land cover patterns in arid and semiarid systems (drylands) worldwide over the past 150 years. This change is known to influence bulk soil carbon (C) pools, but the implications for dynamics and stability of these pools are not well understood. Working in a Chihuahuan Desert C₄ grassland encroached by C₃ creosote bush (Larrea tridentata), we used two den ...
DOI:
10.1007/s10533-012-9735-y

3. Mediation of soil C decomposition by arbuscular mycorrizhal fungi in grass rhizospheres under elevated CO2

Author:
Carrillo, Yolima; Dijkstra, Feike A.; LeCain, Dan; Pendall, Elise
Source:
Biogeochemistry 2016 v.127 no.1 pp. 45-55
ISSN:
0168-2563
Subject:
C3 plants,   etc   ; carbon; carbon dioxide; carbon sequestration; carbon sinks; ecosystems; fungi; grasses; nutrients; plant residues; rhizosphere; soil; soil organic matter; soil stabilization; stable isotopes; vesicular arbuscular mycorrhizae;     Show all 16 Subjects
Abstract:
... Arbuscular mycorrhizal (AMF) function has mostly been studied from the plant perspective, but there is a shortage of empirical assessments of their ecosystem level impacts on soil carbon (C). Our understanding of the role of AMF on C processing belowground has been restricted mostly to fresh plant residues, not stabilized soil organic matter. The mechanisms by which elevated CO₂ (eCO₂) alter soil ...
DOI:
10.1007/s10533-015-0159-3

4. Soil microbial communities and their carbon assimilation are affected by soil properties and season but not by plants differing in their photosynthetic pathways (C3 vs. C4)

Author:
Mellado-Vázquez, Perla Griselle; Lange, Markus; Gleixner, Gerd
Source:
Biogeochemistry 2019 v.142 no.2 pp. 175-187
ISSN:
0168-2563
Subject:
C3 plants,   etc   ; C4 plants; carbon; carbon dioxide fixation; community structure; microbial biomass; microbial communities; phenology; phospholipid fatty acids; photosynthesis; seasonal variation; soil microorganisms; soil sampling; soil texture; soil types; stable isotopes; texture; vegetation;     Show all 18 Subjects
Abstract:
... This study investigates the influence of C3 and C4 plants, soil texture and seasonal changes on the structure and assimilation of plant-derived C of soil microbial communities. In 2012 we collected soil samples in the growing and non-growing season from a vegetation change experiment cropping herbaceous C3 and C4 plants for 6 years on two soils differing in their texture. Phospholipid fatty acids ...
DOI:
10.1007/s10533-018-0528-9