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Victoria Orphan
Office: 109A North Mudd (Seeley W. Mudd Lab) (23)
Phone: 626-395-1786
Email: [email protected]
Mail Code: MC 100-23
Administrative Assistant
Name: Kacey N. Gibson
Email: [email protected]
Phone: 626-395-6921
link Research Website
link Personal Website
Home  /  People  /  Victoria J. Orphan

Victoria J. Orphan

James Irvine Professor of Environmental Science and Geobiology; Allen V. C. Davis and Lenabelle Davis Leadership Chair, Center for Environmental Microbial Interactions; Director, Center for Environmental Microbial Interactions
B.A., University of California (Santa Barbara), 1994; Ph.D., 2002. Assistant Professor, Caltech, 2004-2010; Associate Professor, 2010; Professor, 2010-16; James Irvine Professor, 2016-; Davis Leadership Chair, 2020-; Director, 2020-.
  • Profile
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Research Summary
Molecular microbial ecology of anaerobic communities involved in carbon and sulfur cycling; application and development of combined molecular and isotopic methods for relating uncultured microorganisms to biogeochemical processes and understanding interspecies interactions. Specific research interests include microbial community structure and function in deep subsurface habitats, marine sediments, oil and gas seeps, and early Earth analog environments.

Research Options

Environmental Science and Engineering;  Geobiology; 

Research Areas

Isotope Biogeochemistry;  Molecular Microbial Ecology; 

Profile

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Publications

For a complete publications list, see feeds.library.caltech.edu
Bi/Ge/ESE 105. Evolution. 12 units (3-4-5); second term, 2022-23. Prerequisites: Completion of Core Curriculum Courses. Maximum enrollment: 15, by application only. The theory of evolution is arguably biology’s greatest idea and serves as the overarching framework for thinking about the diversity and relationships between organisms. This course will present a broad picture of evolution starting with discussions of the insights of the great naturalists, the study of the genetic basis of variation, and an introduction to the key driving forces of evolution. Following these foundations, we will then focus on a number of case studies including the following: evolution of oxygenic photosynthesis, origin of eukaryotes, multicellularity, influence of symbiosis, the emergence of life from the water (i.e. fins to limbs), the return of life to the water (i.e. limbs to fins), diversity following major extinction events, the discovery of Archaea, insights into evolution that have emerged from sequence analysis, and finally human evolution and the impact of humans on evolution (including examples such as antibiotic resistance). A specific focus for considering these issues will be the island biogeography of the Galapagos. Given in alternate years; not offered 2022-23.
Instructors: Phillips, Orphan
Ge/ESE/Bi 178. Microbial Ecology. 9 units (3-2-4); second term, 2022-23. Prerequisites: either ESE/Bi 166 or ESE/Bi 168 recommended. Structural, phylogenetic, and metabolic diversity of microorganisms in nature. The course explores microbial interactions, relationships between diversity and physiology in modern and ancient environments, and influence of microbial community structure on biogeochemical cycles. Introduction to ecological principles and molecular approaches used in microbial ecology and geobiological investigations. Given in alternate years; offered 2022-23.
Instructor: Orphan
Ge/Bi/ESE 246. Molecular Geobiology Seminar. 6 units (2-0-4); first term, 2022-23. Critical reviews and discussion of classic papers and current research in microbiology and geomicrobiology. As the topics will vary from year to year, it may be taken multiple times. Not offered 2022-23.
Instructor: Orphan
Ge/ESE/Bi 248. Environmental Justice. 6 units (2-0-4); first term, 2022-23. This seminar course will explore and discuss the unique intersection of environmental racism, environmental justice, and academia. Course material will primarily feature readings and videos on a case study-like basis and focus on bringing conversations typically had in humanities, social sciences and activism to the bio and geosciences. Topics will center around two primary approaches: an "outward-facing" component that looks at environmental racism through the lens of various activisms, and an "inward-facing" component addressing the biases/malpractices broadly employed in the biological and geosciences, as well as the apparent moral dilemmas of decisions involving multiple stakeholders. Out of class work will largely be based on assigned readings, some multimedia presentations, and occasional writings and thought exercises. This course is taught concurrently with Hum 61 and can only be taken once, as Ge/ESE/Bi 248 or Hum 61.
Instructor: Orphan
Bi/Ge/ESE 105. Evolution. 12 units (3-4-5); second term, 2021-22. Prerequisites: Completion of Core Curriculum Courses. Maximum enrollment: 15, by application only. The theory of evolution is arguably biology’s greatest idea and serves as the overarching framework for thinking about the diversity and relationships between organisms. This course will present a broad picture of evolution starting with discussions of the insights of the great naturalists, the study of the genetic basis of variation, and an introduction to the key driving forces of evolution. Following these foundations, we will then focus on a number of case studies including the following: evolution of oxygenic photosynthesis, origin of eukaryotes, multicellularity, influence of symbiosis, the emergence of life from the water (i.e. fins to limbs), the return of life to the water (i.e. limbs to fins), diversity following major extinction events, the discovery of Archaea, insights into evolution that have emerged from sequence analysis, and finally human evolution and the impact of humans on evolution (including examples such as antibiotic resistance). A specific focus for considering these issues will be the island biogeography of the Galapagos. Given in alternate years; offered 2021–22.
Instructors: Phillips, Orphan
Ge/Bi/ESE 246. Molecular Geobiology Seminar. 6 units (2-0-4); first term, 2021-22. Critical reviews and discussion of classic papers and current research in microbiology and geomicrobiology. As the topics will vary from year to year, it may be taken multiple times. Not offered 2021-2022.
Instructor: Orphan
Ge/ESE/Bi 178. Microbial Ecology. 9 units (3-2-4); second term, 2020-21. Prerequisites: Either ESE/Bi 166 or ESE/Bi 168. Structural, phylogenetic, and metabolic diversity of microorganisms in nature. The course explores microbial interactions, relationships between diversity and physiology in modern and ancient environments, and influence of microbial community structure on biogeochemical cycles. Introduction to ecological principles and molecular approaches used in microbial ecology and geobiological investigations. Offered in alternate years; offered 2020-21.
Instructor: Orphan
Ge/Bi/ESE 246. Molecular Geobiology Seminar. 6 units (2-0-4); first term, 2020-21. Critical reviews and discussion of classic papers and current research in microbiology and geomicrobiology. As the topics will vary from year to year, it may be taken multiple times.
Instructor: Orphan
Bi/Ge/ESE 105. Evolution. 12 units (3-4-5); second term, 2019-20. Prerequisites: Completion of Core Curriculum Courses. Maximum enrollment: 15, by application only. The theory of evolution is arguably biology's greatest idea and serves as the overarching framework for thinking about the diversity and relationships between organisms. This course will present a broad picture of evolution starting with discussions of the insights of the great naturalists, the study of the genetic basis of variation, and an introduction to the key driving forces of evolution. Following these foundations, we will then focus on a number of case studies including the following: evolution of oxygenic photosynthesis, origin of eukaryotes, multicellularity, influence of symbiosis, the emergence of life from the water (i.e. fins to limbs), the return of life to the water (i.e. limbs to fins), diversity following major extinction events, the discovery of Archaea, insights into evolution that have emerged from sequence analysis, and finally human evolution and the impact of humans on evolution (including examples such as antibiotic resistance). A specific focus for considering these issues will be the island biogeography of the Galapagos. Given in alternate years; offered 2019-20.
Instructors: Phillips, Orphan
Ge/Bi/ESE 246. Molecular Geobiology Seminar. 6 units (2-0-4); second term, 2019-20. Critical reviews and discussion of classic papers and current research in microbiology and geomicrobiology. As the topics will vary from year to year, it may be taken multiple times.
Instructor: Orphan
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