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The Photosynthetic Process Will Shape How Tree Species from the Boreal-Temperate Ecotone Will Fare in the Future Climate- [electronic resource]
The Photosynthetic Process Will Shape How Tree Species from the Boreal-Temperate Ecotone W...
The Photosynthetic Process Will Shape How Tree Species from the Boreal-Temperate Ecotone Will Fare in the Future Climate- [electronic resource]

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자료유형  
 학위논문파일 국외
최종처리일시  
20240214095837
ISBN  
9798380391641
DDC  
634
저자명  
Stefanski, Artur.
서명/저자  
The Photosynthetic Process Will Shape How Tree Species from the Boreal-Temperate Ecotone Will Fare in the Future Climate - [electronic resource]
발행사항  
[S.l.]: : University of Minnesota., 2021
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2021
형태사항  
1 online resource(180 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Reich, Peter B.;Montgomery, Rebecca A.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2021.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Photosynthesis is a physiological process, without which, life as we know it would not be possible-period. Photosynthesis allows plants to harvest and store energy in carbon bonds; however, like any biological process, it is constrained by several abiotic and biotic conditions. This dissertation was inspired by my fascination with the process of photosynthesis, as I sought insights into: i) its complexity and whether and how the fast pace of changing climate might affect it, and ii) understanding whether signals of plant responses to an ecologically realistic in situ warming and reduced rainfall experiment are consistent across multiple years with varying climatic conditions (e.g., wet vs. dry and hot vs. cold years) warranting confidence and generalization of findings.Leveraging the B4WarmED (Boreal Forest Warming at an Ecotone in Danger) experiment, my collaborators and I investigated whether and how the photosynthetic process of tree species from the boreal-temperate ecotone-as a whole and its subcomponents-will be affected by future climate. B4WarmED is an experimental platform that implements ecologically realistic open-air warming and summer rainfall reduction in juvenile tree species native to the boreal-temperate ecotone in North America. My dissertation is in three parts, i.e., three chapters. First, I show that juvenile tree species reveal a surprising lack of sensitivity of the biochemical limitation of the photosynthetic process in response to warming and water limitation. Second, I demonstrate that stomatal behavior changes under warming such that plants become more prolific water users but only when water is ample. The stomatal behavior becomes more conservative when water becomes more limiting and marginal water cost of carbon gain increases due to either rainfall reduction or an increase of evaporative demand caused by warming. Moreover, the weak effect of elevated temperatures becomes detectable, but only when thermal effects are separated from indirect effects of warming on soil water content. Third, I examine a complex set of interactions that act together to shape carbon assimilation, including its component processes and climatic variables on a long-time scale. As a result, I demonstrate that carbon assimilation of tree species from the boreal-temperate ecotone will be affected by future climate change where temperate species will have a primarily positive response while the boreal will have a negative response. This change in carbon assimilation will be dictated by the alleviating effect that warming will have on photosynthetic enzymes especially, for temperate species, and reduction of stomatal conductance that reduces water loss resulting in increased water use efficiency in all species. Further, I also show that the effects are directionally consistent within species across years and vary in magnitude on an intra and interannual scale due to realized climatic conditions. Together, this dissertation research adds to our understanding of when and how climatic change-in terms of elevated temperatures and altered precipitation-will affect the photosynthetic process and its components. This provides additional insight to basic plant physiology, carbon cycle modeling in response to climate change, and demonstrates how tree species from the boreal-temperate forests will fare in the future climate.
일반주제명  
Forestry.
일반주제명  
Plant sciences.
일반주제명  
Physiology.
키워드  
Photosynthesis
키워드  
Boreal-temperate ecotone
키워드  
Biochemical limitation
기타저자  
University of Minnesota Natural Resources Science and Management
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

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■020    ▼a9798380391641
■035    ▼a(MiAaPQ)AAI28411988
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a634
■1001  ▼aStefanski,  Artur.
■24510▼aThe  Photosynthetic  Process  Will  Shape  How  Tree  Species  from  the  Boreal-Temperate  Ecotone  Will  Fare  in  the  Future  Climate▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  Minnesota.  ▼c2021
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2021
■300    ▼a1  online  resource(180  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Reich,  Peter  B.;Montgomery,  Rebecca  A.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2021.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aPhotosynthesis  is  a  physiological  process,  without  which,  life  as  we  know  it  would  not  be  possible-period.  Photosynthesis  allows  plants  to  harvest  and  store  energy  in  carbon  bonds;  however,  like  any  biological  process,  it  is  constrained  by  several  abiotic  and  biotic  conditions.  This  dissertation  was  inspired  by  my  fascination  with  the  process  of  photosynthesis,  as  I  sought  insights  into:  i)  its  complexity  and  whether  and  how  the  fast  pace  of  changing  climate  might  affect  it,  and  ii)  understanding  whether  signals  of  plant  responses  to  an  ecologically  realistic  in  situ  warming  and  reduced  rainfall  experiment  are  consistent  across  multiple  years  with  varying  climatic  conditions  (e.g.,  wet  vs.  dry  and  hot  vs.  cold  years)  warranting  confidence  and  generalization  of  findings.Leveraging  the  B4WarmED  (Boreal  Forest  Warming  at  an  Ecotone  in  Danger)  experiment,  my  collaborators  and  I  investigated  whether  and  how  the  photosynthetic  process  of  tree  species  from  the  boreal-temperate  ecotone-as  a  whole  and  its  subcomponents-will  be  affected  by  future  climate.  B4WarmED  is  an  experimental  platform  that  implements  ecologically  realistic  open-air  warming  and  summer  rainfall  reduction  in  juvenile  tree  species  native  to  the  boreal-temperate  ecotone  in  North  America.  My  dissertation  is  in  three  parts,  i.e.,  three  chapters.  First,  I  show  that  juvenile  tree  species  reveal  a  surprising  lack  of  sensitivity  of  the  biochemical  limitation  of  the  photosynthetic  process  in  response  to  warming  and  water  limitation.  Second,  I  demonstrate  that  stomatal  behavior  changes  under  warming  such  that  plants  become  more  prolific  water  users  but  only  when  water  is  ample.  The  stomatal  behavior  becomes  more  conservative  when  water  becomes  more  limiting  and  marginal  water  cost  of  carbon  gain  increases  due  to  either  rainfall  reduction  or  an  increase  of  evaporative  demand  caused  by  warming.  Moreover,  the  weak  effect  of  elevated  temperatures  becomes  detectable,  but  only  when  thermal  effects  are  separated  from  indirect  effects  of  warming  on  soil  water  content.  Third,  I  examine  a  complex  set  of  interactions  that  act  together  to  shape  carbon  assimilation,  including  its  component  processes  and  climatic  variables  on  a  long-time  scale.  As  a  result,  I  demonstrate  that  carbon  assimilation  of  tree  species  from  the  boreal-temperate  ecotone  will  be  affected  by  future  climate  change  where  temperate  species  will  have  a  primarily  positive  response  while  the  boreal  will  have  a  negative  response.  This  change  in  carbon  assimilation  will  be  dictated  by  the  alleviating  effect  that  warming  will  have  on  photosynthetic  enzymes  especially,  for  temperate  species,  and  reduction  of  stomatal  conductance  that  reduces  water  loss  resulting  in  increased  water  use  efficiency  in  all  species.  Further,  I  also  show  that  the  effects  are  directionally  consistent  within  species  across  years  and  vary  in  magnitude  on  an  intra  and  interannual  scale  due  to  realized  climatic  conditions.  Together,  this  dissertation  research  adds  to  our  understanding  of  when  and  how  climatic  change-in  terms  of  elevated  temperatures  and  altered  precipitation-will  affect  the  photosynthetic  process  and  its  components.  This  provides  additional  insight  to  basic  plant  physiology,  carbon  cycle  modeling  in  response  to  climate  change,  and  demonstrates  how  tree  species  from  the  boreal-temperate  forests  will  fare  in  the  future  climate.
■590    ▼aSchool  code:  0130.
■650  4▼aForestry.
■650  4▼aPlant  sciences.
■650  4▼aPhysiology.
■653    ▼aPhotosynthesis
■653    ▼aBoreal-temperate  ecotone
■653    ▼aBiochemical  limitation
■690    ▼a0478
■690    ▼a0479
■690    ▼a0719
■71020▼aUniversity  of  Minnesota▼bNatural  Resources  Science  and  Management.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2021
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16930932▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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