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Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling./
作者:	See, Craig Robert.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	139 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
標題:	Biogeochemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28541307
ISBN:	9798534688504

Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling.
See, Craig Robert.

Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 139 p.

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--University of Minnesota, 2021.

This item must not be sold to any third party vendors.

Globally, soils contain more carbon (C) than vegetation and the atmosphere combined. Despite clear importance to the global C budget, estimates of C fluxes into and out of soils remain highly uncertain. Decomposition is the dominant process by which C is lost from soil, but most of what is known about the controls of this process comes from studies of leaf litter at the soil surface. My first two chapters explore factors affecting the decomposition of two common belowground litter types. Chapter one is a global meta-analysis of the drivers of fine root decomposition, and is the first to explore the effects of species-level traits in addition to climate and substrate chemistry. My second chapter describes an experiment characterizing the dynamics and chemical drivers of fungal necromass decomposition, an important and understudied flux of soil C. My final chapter focuses on the role of soil fungi in the formation of "stabilized" soil C in the form of mineral associated organic matter (MAOM). Here, I call into question the current assumption that new MAOM formation in soil occurs in close proximity to root surfaces. Using quantitative estimates of fungal exploration, I put forth the hypothesis that fungal hyphae play an underappreciated role in distributing C through soil, and that hyphal contact with minerals encourages the formation of MAOM. This work suggests that current potential for MAOM formation in soils is significantly underestimated by not accounting for the impact of fungi.

ISBN: 9798534688504Subjects--Topical Terms:

545717
Biogeochemistry.
Subjects--Index Terms:

Root

Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling.
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245 1 0 $a Drivers of Root and Fungal Litter Decomposition: Implications for Soil Carbon Cycling.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 139 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
500 $a Advisor: Hobbie, Sarah E.;Kennedy, Peter G.
502 $a Thesis (Ph.D.)--University of Minnesota, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Globally, soils contain more carbon (C) than vegetation and the atmosphere combined. Despite clear importance to the global C budget, estimates of C fluxes into and out of soils remain highly uncertain. Decomposition is the dominant process by which C is lost from soil, but most of what is known about the controls of this process comes from studies of leaf litter at the soil surface. My first two chapters explore factors affecting the decomposition of two common belowground litter types. Chapter one is a global meta-analysis of the drivers of fine root decomposition, and is the first to explore the effects of species-level traits in addition to climate and substrate chemistry. My second chapter describes an experiment characterizing the dynamics and chemical drivers of fungal necromass decomposition, an important and understudied flux of soil C. My final chapter focuses on the role of soil fungi in the formation of "stabilized" soil C in the form of mineral associated organic matter (MAOM). Here, I call into question the current assumption that new MAOM formation in soil occurs in close proximity to root surfaces. Using quantitative estimates of fungal exploration, I put forth the hypothesis that fungal hyphae play an underappreciated role in distributing C through soil, and that hyphal contact with minerals encourages the formation of MAOM. This work suggests that current potential for MAOM formation in soils is significantly underestimated by not accounting for the impact of fungi.
590 $a School code: 0130.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Ecology. $3 516476
650 4 $a Soil sciences. $3 2122699
650 4 $a Datasets. $3 3541416
650 4 $a Flowers & plants. $3 3564028
650 4 $a Lignin. $3 1097216
650 4 $a Carbon. $3 604057
650 4 $a Variables. $3 3548259
650 4 $a Chemistry. $3 516420
650 4 $a Decomposition. $3 3561186
650 4 $a Nutrients. $3 3562665
650 4 $a Confidence intervals. $3 566017
650 4 $a Plant growth. $3 3540341
650 4 $a Enzymes. $3 520899
650 4 $a Ecosystems. $3 595401
653 $a Root
653 $a Fungal
653 $a Litter decomposition
653 $a Soil carbon cycling
690 $a 0425
690 $a 0329
690 $a 0481
690 $a 0485
710 2 $a University of Minnesota. $b Ecology, Evolution and Behavior. $3 1018645
773 0 $t Dissertations Abstracts International $g 83-02B.
790 $a 0130
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28541307