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Landscape Genetics, in 4D: Exploring the Influence of Spatiotemporal Phenomena on Microevolutionary Dynamics- [electronic resource]
Landscape Genetics, in 4D: Exploring the Influence of Spatiotemporal Phenomena on Microevo...
Landscape Genetics, in 4D: Exploring the Influence of Spatiotemporal Phenomena on Microevolutionary Dynamics- [electronic resource]

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자료유형  
 학위논문(국외)
자관 청구기호  
기본표목-개인명  
표제와 책임표시사항  
Landscape Genetics, in 4D: Exploring the Influence of Spatiotemporal Phenomena on Microevolutionary Dynamics - [electronic resource] / Drew Ellison Terasaki Hart
발행, 배포, 간사 사항  
발행, 배포, 간사 사항  
Ann Arbor : ProQuest Dissertations & Theses , 2022
    형태사항  
    1 online resource(p.162 )
    일반주기  
    Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
    일반주기  
    Advisor: Wang, Ian J.
    학위논문주기  
    Thesis (Ph.D.)--University of California, Berkeley, 2022.
    이용제한주기  
    This item must not be sold to any third party vendors.
    요약 등 주기  
    요약A major goal of landscape genomics is to understand how spatiotemporal variability in complex environments influences evolutionary dynamics, and consequently geographic patterns of genomic diversity, in natural populations. Recent computational advances enable this spatiotemporal complexity to be described and analyzed in unprecedented detail. One such advance is the improvement of forward-time landscape genomic simulation, allowing arbitrarily complex evolutionary scenarios that mimic real-world systems to be created and studied in silico. In chapter 1, I present Geonomics, a new, user-friendly Python package for performing complex, spatially explicit, landscape genomic simulations on changing landscapes and with full spatial pedigrees. I describe the structure and function of Geonomics in detail, show that its results are consistent with expectations for a variety of validation tests based on classical population genetics, then demonstrate its utility and flexibility with example scenarios featuring polygenic selection, selection on multiple traits, and non-stationary environmental change on realistic landscapes. Taken together, these tests and demonstrations establish Geonomics as a robust platform for population genomic simulations that incorporate complex spatiotemporal dynamics.In chapter 2, I apply the software developed in chapter 1 to one of the major areas of theoretical and applied interest in landscape genomics: the evolutionary consequences of climate change. I model climate change realistically, as the decoupling of historical environmental gradients that generates novel multivariate selective environments. I then simulate evolutionary responses to that climate change event across a range of genomic architectures, defined as the full factorial crossing of discretized levels of three key architectural components: the number of genes per trait (polygenicity), the recombination rate between neighboring genes (linkage), and the number of distinct genotypes generating identical phenotypes (genotypic redundancy). I use the results to test a series of hypotheses about the influence of polygenicity, linkage, and redundancy on gene flow, maladaptation, and demographic decline. Results show that a commonly assumed mechanism of evolutionary rescue, adaptive gene flow from populations whose current climates approximate future projection, can be less effective than in situ adaptation under some architectures, likely because of maladaptive introgression caused by the decoupling of environmental gradients. I also find that high polygenicity aggravates maladaptation and demographic decline, a concerning result given the likely polygenic nature of many climate-adapted traits, but that higher genotypic redundancy increases adaptive capacity across all scenarios, adding to the growing recognition of its importance. Overall, this chapter shows that genomic architecture, though it is often ignored, can exert large influence over the effectiveness and relative magnitudes of adaptive gene flow and in situ adaptation in a spatially distributed population subjected to climate change.Another major computational advance facilitating the study of spatiotemporal evolutionary dynamics is the advent of massive and distributed geocomputation. In chapter 3, I use this tool set to study, in unprecedented detail, global geographic variability in the seasonality of terrestrial plant productivity - i.e., land surface phenology (LSP). Not only does the geography of LSP convey critical information about environmental controls on plant function and carbon cycling, but it has important implications for evolutionary biogeography: spatial asynchrony in LSP can indicate the potential for spatial asynchrony in reproductive phenology, and thus for increased genetic isolation and divergence between conspecific populations. Thus, whereas chapter 2 provides an example of the spatial nature of an evolving system influencing its temporal dynamics, this chapter provides an example of the less-appreciated inverse situation: the potential for a system's temporal complexity to influence its evolutionary dynamics. Despite its importance, LSP research lacks mapping methodologies that can characterize the full diversity of terrestrial phenologies, and LSP asynchrony mapping is even less developed. Here, I develop a multivariate, generalized, and robustly-validated LSP mapping methodology, based on simple harmonic regression, then apply it to a 10-year, 0.05° dataset of MODIS near-infrared reflectance of vegetation (NIRV, a proxy of plant productivity). This produces a global LSP map that reveals surprising diversity, including both regional patterns of heterogeneity that are corroborated by prior research and intercontinental patterns of convergence that recapitulate major bioclimatic and biogeographic gradients. Next, I calculate and present a global map of LSP asynchrony, and use machine learning to explore regional variability in its potential climatic and physiographic drivers. I describe LSP asynchrony hotspots in the world's five Mediterranean climate regions, where asynchrony appears driven by precipitation asynchrony and spatial variability in vegetation structure, and in tropical montane regions, where minimum temperature asynchrony and precipitation asynchrony appear to be interacting drivers. Lastly, I use an ensemble of regressions within global high-asynchrony regions to demonstrate that phenological asynchrony between climatically similar sites is most frequent at lower latitudes, supporting the notion that phenological asynchrony is most likely to cause allochrony and consequent evolutionary divergence in the tropics.
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    부출표목-단체명  
    University of California Berkeley Environmental Science Policy & Management
      기본자료저록  
      Dissertations Abstracts International. 85-04B.
      기본자료저록  
      Dissertation Abstract International
      전자적 위치 및 접속  
       원문정보보기
      소장사항  
      202402 2024

      MARC

       008240306s2022        s  |          s        0000c|  eng  d
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      ■035    ▼a(MiAaPQ)AAI30243131
      ■040    ▼aMiAaPQ▼cMiAaPQ
      ■08204▼a574.5
      ■090    ▼a전자도서(박사논문)
      ■1001  ▼aTerasaki  Hart,  Drew  Ellison.
      ■24510▼aLandscape  Genetics,  in  4D:  Exploring  the  Influence  of  Spatiotemporal  Phenomena  on  Microevolutionary  Dynamics▼h[electronic  resource]▼cDrew  Ellison  Terasaki  Hart
      ■260    ▼a[S.l.]▼bUniversity  of  California,  Berkeley.  ▼c2022
      ■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
      ■300    ▼a1  online  resource(p.162  )
      ■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-04,  Section:  B.
      ■500    ▼aAdvisor:  Wang,  Ian  J.
      ■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2022.
      ■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
      ■520    ▼aA  major  goal  of  landscape  genomics  is  to  understand  how  spatiotemporal  variability  in  complex  environments  influences  evolutionary  dynamics,  and  consequently  geographic  patterns  of  genomic  diversity,  in  natural  populations.  Recent  computational  advances  enable  this  spatiotemporal  complexity  to  be  described  and  analyzed  in  unprecedented  detail.  One  such  advance  is  the  improvement  of  forward-time  landscape  genomic  simulation,  allowing  arbitrarily  complex  evolutionary  scenarios  that  mimic  real-world  systems  to  be  created  and  studied  in  silico.  In  chapter  1,  I  present  Geonomics,  a  new,  user-friendly  Python  package  for  performing  complex,  spatially  explicit,  landscape  genomic  simulations  on  changing  landscapes  and  with  full  spatial  pedigrees.  I  describe  the  structure  and  function  of  Geonomics  in  detail,  show  that  its  results  are  consistent  with  expectations  for  a  variety  of  validation  tests  based  on  classical  population  genetics,  then  demonstrate  its  utility  and  flexibility  with  example  scenarios  featuring  polygenic  selection,  selection  on  multiple  traits,  and  non-stationary  environmental  change  on  realistic  landscapes.  Taken  together,  these  tests  and  demonstrations  establish  Geonomics  as  a  robust  platform  for  population  genomic  simulations  that  incorporate  complex  spatiotemporal  dynamics.In  chapter  2,  I  apply  the  software  developed  in  chapter  1  to  one  of  the  major  areas  of  theoretical  and  applied  interest  in  landscape  genomics:  the  evolutionary  consequences  of  climate  change.  I  model  climate  change  realistically,  as  the  decoupling  of  historical  environmental  gradients  that  generates  novel  multivariate  selective  environments.  I  then  simulate  evolutionary  responses  to  that  climate  change  event  across  a  range  of  genomic  architectures,  defined  as  the  full  factorial  crossing  of  discretized  levels  of  three  key  architectural  components:  the  number  of  genes  per  trait  (polygenicity),  the  recombination  rate  between  neighboring  genes  (linkage),  and  the  number  of  distinct  genotypes  generating  identical  phenotypes  (genotypic  redundancy).  I  use  the  results  to  test  a  series  of  hypotheses  about  the  influence  of  polygenicity,  linkage,  and  redundancy  on  gene  flow,  maladaptation,  and  demographic  decline.  Results  show  that  a  commonly  assumed  mechanism  of  evolutionary  rescue,  adaptive  gene  flow  from  populations  whose  current  climates  approximate  future  projection,  can  be  less  effective  than  in  situ  adaptation  under  some  architectures,  likely  because  of  maladaptive  introgression  caused  by  the  decoupling  of  environmental  gradients.  I  also  find  that  high  polygenicity  aggravates  maladaptation  and  demographic  decline,  a  concerning  result  given  the  likely  polygenic  nature  of  many  climate-adapted  traits,  but  that  higher  genotypic  redundancy  increases  adaptive  capacity  across  all  scenarios,  adding  to  the  growing  recognition  of  its  importance.  Overall,  this  chapter  shows  that  genomic  architecture,  though  it  is  often  ignored,  can  exert  large  influence  over  the  effectiveness  and  relative  magnitudes  of  adaptive  gene  flow  and  in  situ  adaptation  in  a  spatially  distributed  population  subjected  to  climate  change.Another  major  computational  advance  facilitating  the  study  of  spatiotemporal  evolutionary  dynamics  is  the  advent  of  massive  and  distributed  geocomputation.  In  chapter  3,  I  use  this  tool  set  to  study,  in  unprecedented  detail,  global  geographic  variability  in  the  seasonality  of  terrestrial  plant  productivity  -  i.e.,  land  surface  phenology  (LSP).  Not  only  does  the  geography  of  LSP  convey  critical  information  about  environmental  controls  on  plant  function  and  carbon  cycling,  but  it  has  important  implications  for  evolutionary  biogeography:  spatial  asynchrony  in  LSP  can  indicate  the  potential  for  spatial  asynchrony  in  reproductive  phenology,  and  thus  for  increased  genetic  isolation  and  divergence  between  conspecific  populations.  Thus,  whereas  chapter  2  provides  an  example  of  the  spatial  nature  of  an  evolving  system  influencing  its  temporal  dynamics,  this  chapter  provides  an  example  of  the  less-appreciated  inverse  situation:  the  potential  for  a  system's  temporal  complexity  to  influence  its  evolutionary  dynamics.  Despite  its  importance,  LSP  research  lacks  mapping  methodologies  that  can  characterize  the  full  diversity  of  terrestrial  phenologies,  and  LSP  asynchrony  mapping  is  even  less  developed.  Here,  I  develop  a  multivariate,  generalized,  and  robustly-validated  LSP  mapping  methodology,  based  on  simple  harmonic  regression,  then  apply  it  to  a  10-year,  0.05°  dataset  of  MODIS  near-infrared  reflectance  of  vegetation  (NIRV,  a  proxy  of  plant  productivity).  This  produces  a  global  LSP  map  that  reveals  surprising  diversity,  including  both  regional  patterns  of  heterogeneity  that  are  corroborated  by  prior  research  and  intercontinental  patterns  of  convergence  that  recapitulate  major  bioclimatic  and  biogeographic  gradients.  Next,  I  calculate  and  present  a  global  map  of  LSP  asynchrony,  and  use  machine  learning  to  explore  regional  variability  in  its  potential  climatic  and  physiographic  drivers.  I  describe  LSP  asynchrony  hotspots  in  the  world's  five  Mediterranean  climate  regions,  where  asynchrony  appears  driven  by  precipitation  asynchrony  and  spatial  variability  in  vegetation  structure,  and  in  tropical  montane  regions,  where  minimum  temperature  asynchrony  and  precipitation  asynchrony  appear  to  be  interacting  drivers.  Lastly,  I  use  an  ensemble  of  regressions  within  global  high-asynchrony  regions  to  demonstrate  that  phenological  asynchrony  between  climatically  similar  sites  is  most  frequent  at  lower  latitudes,  supporting  the  notion  that  phenological  asynchrony  is  most  likely  to  cause  allochrony  and  consequent  evolutionary  divergence  in  the  tropics.
      ■590    ▼aSchool  code:  0028.
      ■650  4▼aEcology.
      ■650  4▼aGenetics.
      ■650  4▼aClimate  change.
      ■650  4▼aRemote  sensing.
      ■653    ▼aGenetic  architecture
      ■653    ▼aLandscape  genomics
      ■653    ▼aLocal  adaptation
      ■653    ▼aPhenology
      ■653    ▼aSimulation  modeling
      ■690    ▼a0329
      ■690    ▼a0369
      ■690    ▼a0404
      ■690    ▼a0799
      ■690    ▼a0474
      ■71020▼aUniversity  of  California,  Berkeley▼bEnvironmental  Science,  Policy,  &  Management.
      ■7730  ▼tDissertations  Abstracts  International▼g85-04B.
      ■773    ▼tDissertation  Abstract  International
      ■790    ▼a0028
      ■791    ▼aPh.D.
      ■792    ▼a2022
      ■793    ▼aEnglish
      ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931245▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
      ■980    ▼a202402▼f2024

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