본문

서브메뉴

Dead or Alive: Fungal Controls on Decomposition and Soil Carbon Storage in Northern Temperate Forests
Dead or Alive: Fungal Controls on Decomposition and Soil Carbon Storage in Northern Temper...
Dead or Alive: Fungal Controls on Decomposition and Soil Carbon Storage in Northern Temperate Forests

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202104839
ISBN  
9798293868544
DDC  
574.5
저자명  
DeLancey, Lang Carl.
서명/저자  
Dead or Alive: Fungal Controls on Decomposition and Soil Carbon Storage in Northern Temperate Forests
발행사항  
[Sl] : University of Minnesota, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
142 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Hobbie, Sarah E.;Kennedy, Peter G.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2025.
초록/해제  
요약Soils store more carbon (C) than living vegetation and the atmosphere combined. Therefore, understanding the factors that regulate soil C storage and loss (decomposition) will be critical in understanding C cycling under ongoing climate change. Fungi play key roles in decomposition and C storage in forests by being the primary decomposers (saprotrophs) and acting as plant mutualists (ectomycorrhizal fungi; ECM). It has been hypothesized that these ECM fungi, which receive C from their host plant, can outcompete saprotrophs for nitrogen (N), reducing decomposition. However, it is unclear a) whether this suppressive effect of ECM fungi on decomposition leads to increased C storage and b) how widespread it is among temperate pine forests. Further, recent research has found a majority of soil C and N is made up of dead fungal hyphae (necromass), yet the chemical controls on C and N loss from necromass during decomposition and how these interact with global change factors like N addition, are poorly understood. The goals of this dissertation are therefore to elucidate the consequences and variation of ECM-saprotroph interactions and to clarify how N fertilization impacts fungal necromass decomposition. In chapter 1 I found that the presence of ECM fungi decreased the decomposition of belowground tissues and increased soil C stocks by 10%. This latter effect was strongest in the top 5 cm of soil and in fast-cycling, unprotected soil C. In chapter 2 I found that ECM suppression of leaf litter decomposition is not as widespread across temperate pine forests as previously theorized. Rather, ECM fungi either increase or do not affect pine litter decomposition in pine forests in California, Minnesota, and Florida. In chapter 3 I found that necromass C loss, N loss, and responses to fertilization varied with necromass chemistry. Specifically, N addition inhibited late stage necromass decomposition, but this effect was weakest in melanin-rich necromass, contrary to hypotheses based on plant litter. Together, these results add to our understanding of how fungi, dead and alive, influence soil C and N cycling and highlight the diversity and importance of fungal chemistry and interguild interactions.
일반주제명  
Ecology
일반주제명  
Biogeochemistry
일반주제명  
Forestry
일반주제명  
Biochemistry
일반주제명  
Climate change
키워드  
Carbon
키워드  
Decomposition
키워드  
Fungi
키워드  
Necromass
키워드  
Nitrogen
키워드  
Soil organic matter
기타저자  
University of Minnesota Ecology Evolution and Behavior
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017359132
■00520260202104839
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798293868544
■035    ▼a(MiAaPQ)AAI32172367
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574.5
■1001  ▼aDeLancey,  Lang  Carl.
■24510▼aDead  or  Alive:  Fungal  Controls  on  Decomposition  and  Soil  Carbon  Storage  in  Northern  Temperate  Forests
■260    ▼a[Sl]▼bUniversity  of  Minnesota▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a142  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Hobbie,  Sarah  E.;Kennedy,  Peter  G.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2025.
■520    ▼aSoils  store  more  carbon  (C)  than  living  vegetation  and  the  atmosphere  combined.  Therefore,  understanding  the  factors  that  regulate  soil  C  storage  and  loss  (decomposition)  will  be  critical  in  understanding  C  cycling  under  ongoing  climate  change.  Fungi  play  key  roles  in  decomposition  and  C  storage  in  forests  by  being  the  primary  decomposers  (saprotrophs)  and  acting  as  plant  mutualists  (ectomycorrhizal  fungi;  ECM).  It  has  been  hypothesized  that  these  ECM  fungi,  which  receive  C  from  their  host  plant,  can  outcompete  saprotrophs  for  nitrogen  (N),  reducing  decomposition.  However,  it  is  unclear  a)  whether  this  suppressive  effect  of  ECM  fungi  on  decomposition  leads  to  increased  C  storage  and  b)  how  widespread  it  is  among  temperate  pine  forests.  Further,  recent  research  has  found  a  majority  of  soil  C  and  N  is  made  up  of  dead  fungal  hyphae  (necromass),  yet  the  chemical  controls  on  C  and  N  loss  from  necromass  during  decomposition  and  how  these  interact  with  global  change  factors  like  N  addition,  are  poorly  understood.  The  goals  of  this  dissertation  are  therefore  to  elucidate  the  consequences  and  variation  of  ECM-saprotroph  interactions  and  to  clarify  how  N  fertilization  impacts  fungal  necromass  decomposition.  In  chapter  1  I  found  that  the  presence  of  ECM  fungi  decreased  the  decomposition  of  belowground  tissues  and  increased  soil  C  stocks  by  10%.  This  latter  effect  was  strongest  in  the  top  5  cm  of  soil  and  in  fast-cycling,  unprotected  soil  C.  In  chapter  2  I  found  that  ECM  suppression  of  leaf  litter  decomposition  is  not  as  widespread  across  temperate  pine  forests  as  previously  theorized.  Rather,  ECM  fungi  either  increase  or  do  not  affect  pine  litter  decomposition  in  pine  forests  in  California,  Minnesota,  and  Florida.  In  chapter  3  I  found  that  necromass  C  loss,  N  loss,  and  responses  to  fertilization  varied  with  necromass  chemistry.  Specifically, N  addition  inhibited  late  stage  necromass  decomposition,  but  this  effect  was  weakest  in  melanin-rich  necromass,  contrary  to  hypotheses  based  on  plant  litter.  Together,  these  results  add  to  our  understanding  of  how  fungi,  dead  and  alive,  influence  soil  C  and  N  cycling  and  highlight  the  diversity  and  importance  of  fungal  chemistry  and  interguild  interactions.
■590    ▼aSchool  code:  0130.
■650  4▼aEcology
■650  4▼aBiogeochemistry
■650  4▼aForestry
■650  4▼aBiochemistry
■650  4▼aClimate  change
■653    ▼aCarbon
■653    ▼aDecomposition
■653    ▼aFungi
■653    ▼aNecromass
■653    ▼aNitrogen
■653    ▼aSoil  organic  matter
■690    ▼a0329
■690    ▼a0425
■690    ▼a0478
■690    ▼a0487
■690    ▼a0404
■71020▼aUniversity  of  Minnesota▼bEcology,  Evolution  and  Behavior.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359132▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF17621 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.