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Understanding Evolvability
Understanding Evolvability
Understanding Evolvability

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자료유형  
 학위논문 서양
최종처리일시  
20250211152819
ISBN  
9798384025771
DDC  
100
저자명  
Deaven, Katherine Janina.
서명/저자  
Understanding Evolvability
발행사항  
[Sl] : The University of Wisconsin - Madison, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
165 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Sober, Elliott;Clatterbuck, Hayley.
학위논문주기  
Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
초록/해제  
요약Over the past thirty years, evolvability has garnered significant interest in evolutionary biology and the philosophy of biology. Broadly defined, evolvability pertains to the evolutionary options available to a given biological entity at a particular time. Champions of the emerging concept maintain that it holds considerable explanatory promise, shedding light on differences in evolutionary outcomes across the Tree of Life and the complex network of factors that influence the amount, bias in direction, and kind of phenotypic variation that could arise within a given population. In doing so, evolvability unifies many seemingly disparate and perplexing physical and biological properties at different levels of organization.Moreover, proponents argue that the emerging concept will revolutionize research in evolutionary biology and our understanding of adaptation. While selection and the other canonical evolutionary factors undoubtedly play a role in producing the many adaptations we see today, proponents argue that evolvability explains how adaptive traits continue to arise despite the tremendous increase in organismal complexity from a strain of bacteria to a human being. Consequently, advocates argue that evolvability fills a significant explanatory gap in evolutionary theorizing. However, as the literature on this new posit has grown, evolvability has only become more opaque, with little consensus on what it is, what it is supposed to explain, and consequently, what the bearers of-and contributors to-evolvability are.In my dissertation, Understanding Evolvability, I seek to answer these questions concerning evolvability's explanatory and ontological status. Ultimately, I argue that, like selection and drift, evolvability is a cause of evolution. To develop this account, I begin by outlining the conceptual disagreements about evolvability in Chapter 1. While there is near consensus that evolvability is a kind of disposition, the nature of the disposition and its physical bases are highly disputed. This has led some philosophers of biology to embrace a pluralist account of evolvability. I argue that there are limitations to this view and motivate the need for a unified account of evolvability.In Chapter 2, I outline the nearer and more distant origins of evolvability research and two unearth two candidates for developing a unified account of evolvability. I defend the evolvability concept with the narrower scope as being the more promising candidate. I defend this view based on the extent each candidate: satisfies the historical motivations for researching evolvability, captures the nature of potentiality associated with evolvability, and yields a projectible account of evolvability.In Chapter 3, I develop an extended analogy I explore an extended analogy between treating evolvability as a dispositional property of populations and the propensity interpretation of fitness (PIF). According to PIF, fitness is a property that describes how probable it is that an organism will produce no offspring, one offspring, etc., given the environment it lives in and its traits. PIF has significant explanatory virtues and resolves challenges with earlier definitions of fitness, but it also faces new ones. I argue that the motivations for adopting PIF, as well as the contemporary challenges it faces, provide insight for constructing a view of evolvability akin to PIF. There are benefits that come with thinking about evolvability in this way. By putting evolvability on the same footing as fitness, we can better answer the challenge I outlined above: Should evolvability be considered a central explanatory concept-like fitness-in evolutionary theory? Further, this analogy goes both ways: developing this account of evolvability can also shed light on the contemporary debates about fitness.In Chapter 4, co-authored with Pierrick Bourrat and Cristina Villegas and reproduced with permission from Springer Nature, I consider whether evolvability is better captured within Pence and Ramsey's new foundation, a conception of PIF which describes fitness as a probability distribution that encompasses all possible lineages the organism may give rise to, including how the organism's traits might change and all possible environments the organism might encounter. This long-term definition of fitness is general enough to avoid counterexamples that other mathematical conceptions face. However, there seem to be downsides to generality: the ecological role of fitness involves describing the degree of adaptedness between an organism and the specific environment it inhabits. When all possible changes in traits and all possible environments are included in the concept, it becomes hard to see how fitness can fulfill this role. We argue that this is a feature of this view of fitness, rather than a bug: long-term fitness accommodates evolvability considerations, which concern the role that variation plays in evolutionary processes and provides a more accurate accounting of long-term evolutionary success.In Chapter 5, co-authored with Hayley Clatterbuck, we consider whether evolvability can be suitably captured within the framework of forces. According to Sober's (1984) force model of evolution, evolutionary factors (e.g., selection and drift) are analogous to forces in Newtonian mechanics. Some biologists and philosophers have recently proposed a new evolutionary factor: evolvability. We consider whether evolvability ought to be seen as an evolutionary force, arguing that evolvability satisfies the key criteria for force-hood: it is a cause, has magnitude and direction, is distinct from other forces of evolution, combines with other forces, and unifies biological theorizing. However, the concept of evolvability is in flux. We conclude that if evolvability theorists want it to resemble canonical evolutionary forces, there are features a settled account of evolvability should emphasize.
일반주제명  
Philosophy
일반주제명  
Biology
일반주제명  
Evolution & development
키워드  
Causation
키워드  
Disposition
키워드  
Evolvability
키워드  
Force
키워드  
Evolutionary biology
키워드  
Propensity interpretation of fitness
기타저자  
The University of Wisconsin - Madison Philosophy
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

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■5021  ▼aThesis  (Ph.D.)--The  University  of  Wisconsin  -  Madison,  2024.
■520    ▼aOver  the  past  thirty  years,  evolvability  has  garnered  significant  interest  in  evolutionary  biology  and  the  philosophy  of  biology.  Broadly  defined,  evolvability  pertains  to  the  evolutionary  options  available  to  a  given  biological  entity  at  a  particular  time.  Champions  of  the  emerging  concept  maintain  that  it  holds  considerable  explanatory  promise,  shedding  light  on  differences  in  evolutionary  outcomes  across  the  Tree  of  Life  and  the  complex  network  of  factors  that  influence  the  amount,  bias  in  direction,  and  kind  of  phenotypic  variation  that  could  arise  within  a  given  population.  In  doing  so,  evolvability  unifies  many  seemingly  disparate  and  perplexing  physical  and  biological  properties  at  different  levels  of  organization.Moreover,  proponents  argue  that  the  emerging  concept  will  revolutionize  research  in  evolutionary  biology  and  our  understanding  of  adaptation.  While  selection  and  the  other  canonical  evolutionary  factors  undoubtedly  play  a  role  in  producing  the  many  adaptations  we  see  today,  proponents  argue  that  evolvability  explains  how  adaptive  traits  continue  to  arise  despite  the  tremendous  increase  in  organismal  complexity  from  a  strain  of  bacteria  to  a  human  being.  Consequently,  advocates  argue  that  evolvability  fills  a  significant  explanatory  gap  in  evolutionary  theorizing.  However,  as  the  literature  on  this  new  posit  has  grown,  evolvability  has  only  become  more  opaque,  with  little  consensus  on  what  it  is,  what  it  is  supposed  to  explain,  and  consequently,  what  the  bearers  of-and  contributors  to-evolvability  are.In  my  dissertation,  Understanding  Evolvability,  I  seek  to  answer  these  questions  concerning  evolvability's  explanatory  and  ontological  status.  Ultimately,  I  argue  that,  like  selection  and  drift,  evolvability  is  a  cause  of  evolution.  To  develop  this  account,  I  begin  by  outlining  the  conceptual  disagreements  about  evolvability  in  Chapter  1.  While  there  is  near  consensus  that  evolvability  is  a  kind  of  disposition,  the  nature  of  the  disposition  and  its  physical  bases  are  highly  disputed.  This  has  led  some  philosophers  of  biology  to  embrace  a  pluralist  account  of  evolvability.  I  argue  that  there  are  limitations  to  this  view  and  motivate  the  need  for  a  unified  account  of  evolvability.In  Chapter  2,  I  outline  the  nearer  and  more  distant  origins  of  evolvability  research  and  two  unearth  two  candidates  for  developing  a  unified  account  of  evolvability.  I  defend  the  evolvability  concept  with  the  narrower  scope  as  being  the  more  promising  candidate.  I  defend  this  view  based  on  the  extent  each  candidate:  satisfies  the  historical  motivations  for  researching  evolvability,  captures  the  nature  of  potentiality  associated  with  evolvability,  and  yields  a  projectible  account  of  evolvability.In  Chapter  3,  I  develop  an  extended  analogy  I  explore  an  extended  analogy  between  treating  evolvability  as  a  dispositional  property  of  populations  and  the  propensity  interpretation  of  fitness  (PIF).  According  to  PIF,  fitness  is  a  property  that  describes  how  probable  it  is  that  an  organism  will  produce  no  offspring,  one  offspring,  etc.,  given  the  environment  it  lives  in  and  its  traits.  PIF  has  significant  explanatory  virtues  and  resolves  challenges  with  earlier  definitions  of  fitness,  but  it  also  faces  new  ones.  I  argue  that  the  motivations  for  adopting  PIF,  as  well  as  the  contemporary  challenges  it  faces,  provide  insight  for  constructing  a  view  of  evolvability  akin  to  PIF.  There  are  benefits  that  come  with  thinking  about  evolvability  in  this  way.  By  putting  evolvability  on  the  same  footing  as  fitness,  we  can  better  answer  the  challenge  I  outlined  above:  Should  evolvability  be  considered  a  central  explanatory  concept-like  fitness-in  evolutionary  theory?  Further,  this  analogy  goes  both  ways:  developing  this  account  of  evolvability  can  also  shed  light  on  the  contemporary  debates  about  fitness.In  Chapter  4,  co-authored  with  Pierrick  Bourrat  and  Cristina  Villegas  and  reproduced  with  permission  from  Springer  Nature,  I  consider  whether  evolvability  is  better  captured  within  Pence  and  Ramsey's  new  foundation,  a  conception  of  PIF  which  describes  fitness  as  a  probability  distribution  that  encompasses  all  possible  lineages  the  organism  may  give  rise  to,  including  how  the  organism's  traits  might  change  and  all  possible  environments  the  organism  might  encounter.  This  long-term  definition  of  fitness  is  general  enough  to  avoid  counterexamples  that  other  mathematical  conceptions  face.  However,  there  seem  to  be  downsides  to  generality:  the  ecological  role  of  fitness  involves  describing  the  degree  of  adaptedness  between  an  organism  and  the  specific  environment  it  inhabits.  When  all  possible  changes  in  traits  and  all  possible  environments  are  included  in  the  concept,  it  becomes  hard  to  see  how  fitness  can  fulfill  this  role.  We  argue  that  this  is  a  feature  of  this  view  of  fitness,  rather  than  a  bug:  long-term  fitness  accommodates  evolvability  considerations,  which  concern  the  role  that  variation  plays  in  evolutionary  processes  and  provides  a  more  accurate  accounting  of  long-term  evolutionary  success.In  Chapter  5,  co-authored  with  Hayley  Clatterbuck,  we  consider  whether  evolvability  can  be  suitably  captured  within  the  framework  of  forces.  According  to  Sober's  (1984)  force  model  of  evolution,  evolutionary  factors  (e.g.,  selection  and  drift)  are  analogous  to  forces  in  Newtonian  mechanics.  Some  biologists  and  philosophers  have  recently  proposed  a  new  evolutionary  factor:  evolvability.  We  consider  whether  evolvability  ought  to  be  seen  as  an  evolutionary  force,  arguing  that  evolvability  satisfies  the  key  criteria  for  force-hood:  it  is  a  cause,  has  magnitude  and  direction,  is  distinct  from  other  forces  of  evolution,  combines  with  other  forces,  and  unifies  biological  theorizing.  However,  the  concept  of  evolvability  is  in  flux.  We  conclude  that  if  evolvability  theorists  want  it  to  resemble  canonical  evolutionary  forces,  there  are  features  a  settled  account  of  evolvability  should  emphasize.
■590    ▼aSchool  code:  0262.
■650  4▼aPhilosophy
■650  4▼aBiology
■650  4▼aEvolution  &  development
■653    ▼aCausation
■653    ▼aDisposition
■653    ▼aEvolvability
■653    ▼aForce
■653    ▼aEvolutionary  biology
■653    ▼aPropensity  interpretation  of  fitness
■690    ▼a0422
■690    ▼a0412
■690    ▼a0306
■71020▼aThe  University  of  Wisconsin  -  Madison▼bPhilosophy.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a0262
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164001▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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