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Pedogenesis & carbon dynamics across...

Heckman, Katherine Ann.

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Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine./
Author:	Heckman, Katherine Ann.
Description:	234 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-12, Section: B, page: 7308.
Contained By:	Dissertation Abstracts International71-12B.
Subject:	Biogeochemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3427633
ISBN:	9781124321929

Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine.
Heckman, Katherine Ann.

Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine. - 234 p.

Source: Dissertation Abstracts International, Volume: 71-12, Section: B, page: 7308.

Thesis (Ph.D.)--The University of Arizona, 2010.

Three studies were completed to investigate the influence of mineral assemblage on soil organic carbon (SOC) cycling and pedogenesis in forest soils. Two studies utilized a lithosequence of four parent materials (rhyolite, granite, basalt, limestone/volcanic cinders) under Pinus ponderosa, to explicitly quantify the contribution of parent material mineral assemblage to the character of the resulting soil. The first study explored variation in pedogenesis and elemental mass loss as a product of parent material through a combination of quantitative X-ray diffraction and elemental mass balance. Results indicated significant differences in degree of soil development, profile characteristics, and mass flux according to parent material.

ISBN: 9781124321929Subjects--Topical Terms:

545717
Biogeochemistry.

Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine.
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008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124321929
035 $a (UMI)AAI3427633
035 $a AAI3427633
040 $a UMI $c UMI
100 1 $a Heckman, Katherine Ann. $3 1678666
245 1 0 $a Pedogenesis & carbon dynamics across a lithosequence under ponderosa pine.
300 $a 234 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-12, Section: B, page: 7308.
500 $a Adviser: Craig Rasmussen.
502 $a Thesis (Ph.D.)--The University of Arizona, 2010.
520 $a Three studies were completed to investigate the influence of mineral assemblage on soil organic carbon (SOC) cycling and pedogenesis in forest soils. Two studies utilized a lithosequence of four parent materials (rhyolite, granite, basalt, limestone/volcanic cinders) under Pinus ponderosa, to explicitly quantify the contribution of parent material mineral assemblage to the character of the resulting soil. The first study explored variation in pedogenesis and elemental mass loss as a product of parent material through a combination of quantitative X-ray diffraction and elemental mass balance. Results indicated significant differences in degree of soil development, profile characteristics, and mass flux according to parent material.
520 $a The second study utilized the same lithosequence of soils, but focused on organic C cycling. This study explored variation in SOC content among soils of differing mineralogy and correlations among soil physiochemical variables, SOC content, soil microbial community composition and respiration rates. Metal-humus complex and Fe-oxyhydroxide content emerged as important predictors of SOC dynamics across all parent materials, showing significant correlation with both SOC content and bacterial community composition. Results indicated that within a specific ecosystem, SOC dynamics and microbial community vary predictably with soil physicochemical variables directly related to mineralogical differences among soil parent materials.
520 $a The third study focused specifically on the influence of goethite and gibbsite on dissolved organic matter characteristics and microbial communities which utilize DOM as a growth substrate. Iron and aluminum oxides were selected for this study due to their wide spread occurrence in soils and their abundance of reactive surface area, qualities which enable them to have a significant effect on SOC transported through forest soils. Results indicated that exposure to goethite and gibbsite surfaces induces significant differences in DOM quality, including changes in thermal properties, molecular structure, and concentrations of P and N. Investigation of the decomposer communities indicated that exposure to goethite and gibbsite surfaces caused significant differences in microbial community structure.
520 $a These investigations emphasize the important role of mineral assemblage in shaping soil characteristics and regulating the cycling of C in soils, from the molecular scale to the pedon scale.
590 $a School code: 0009.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Environmental Sciences. $3 676987
690 $a 0425
690 $a 0481
690 $a 0768
710 2 $a The University of Arizona. $b Soil, Water & Environmental Science. $3 1021772
773 0 $t Dissertation Abstracts International $g 71-12B.
790 1 0 $a Rasmussen, Craig, $e advisor
790 1 0 $a Chorover, Jon $e committee member
790 1 0 $a Schwartz, Egbert $e committee member
790 1 0 $a Maier, Raina $e committee member
790 1 0 $a Silvertooth, Jeffrey $e committee member
790 $a 0009
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3427633