About

Page Chamberlain is a Professor of Earth and Planetary Sciences and of Earth System Science at Stanford University. He holds a Ph.D. in Geology and Geophysics from Harvard University, obtained in 1985, along with a Master of Arts in Earth Sciences from Dartmouth College in 1981 and a Bachelor of Science in Earth Sciences from Syracuse University in 1979. His academic and research focus is within the fields of Earth and Planetary Sciences, contributing to the understanding of terrestrial paleoclimate and related Earth system processes. He is actively involved in the department's academic community, engaging in research, teaching, and mentorship.

Research topics

• Computer Science
• Geography
• Biology
• Ecology
• Oceanography
• World Wide Web
• Library science
• Agroforestry
• Chemistry
• Geochemistry
• Paleontology
• Geology
• Environmental science
• Physical geography

Selected publications

• Using stable isotopes to measure the dietary responses of Costa Rican forest birds to agricultural countryside

  Frontiers in Ecology and Evolution · 2023 · 2 citations

  • Ecology
  • Agroforestry
  • Geography

  How human modification of native habitats changes the feeding patterns and nutritional ecology of tropical birds is critical to conserving avian biodiversity, but tropical bird diets are laborious to investigate using the traditional methods of diet analysis. Stable isotope analysis provides a cost-effective and efficient proxy to identify general foraging patterns, especially when dietary shifts spanning multiple trophic levels have occurred due to ecosystem disturbance or transformation. To characterize the diets of forest bird species that persist in tropical agricultural countryside, we compared feather carbon (δ 13 C) and nitrogen (δ 15 N) isotope values of four species caught and radio-tracked in a 270 hectare forest reserve, smaller forest remnants (including mature forest, secondary forest, and riparian strips), and coffee plantations in mid-elevation ( ca. 800–1,400 m) southern Costa Rica. Bird habitat choice had a significant effect on diet composition as revealed by δ 13 C and δ 15 N values. Three of the four species studied showed evidence of significantly reduced consumption of invertebrates in coffee plantations, with the isotope values of two species ( Tangara icterocephala and Mionectes oleaginous ) indicating, by comparison, nearly a doubling of invertebrate consumption in forest remnants. Our results suggest that coffee plantations are deficient in invertebrates preferred by forest generalist birds that forage in both native forest remnants and coffee plantations. In this region, typical of mountainous American tropics, small forest remnants and a larger forest reserve provide critical dietary resources for native forest birds that utilize the agricultural countryside.

  PublisherOA PDFDOI

• Drier winters drove Cenozoic open habitat expansion in North America

  2021 · 4 citations

  Senior authorCorresponding
  • Environmental science
  • Geology
  • Physical geography

  The shift from denser forests to open, grass-dominated vegetation in west-central North America between 26 and 15 million years ago is a major ecological transition with no clear driving force. This open habitat transition (OHT) is considered by some to be evidence for drier summers, more seasonal precipitation, or a cooler climate, but others have proposed that wetter conditions and/or warming initiated the OHT. Here, we use published (n=2065) and new (n=173) oxygen isotope measurements (δ18O) in authigenic clays and soil carbonates to test the hypothesis that the OHT is linked to increasing wintertime aridity. Oxygen isotope ratios in meteoric water (δ18Op) vary seasonally, and clays and carbonates often form at different times of the year. Therefore, a change in precipitation seasonality can be recorded differently in each mineral. We find that oxygen isotope ratios of clay minerals increase across the OHT while carbonate oxygen isotope ratios show no change or decrease. This result cannot be explained solely by changes in global temperature or a shift to drier summers. Instead, it is consistent with a decrease in winter precipitation that increases annual mean δ18Op (and clay δ18O) but has a smaller or negligible effect on soil carbonates that primarily form in warmer months. We suggest that forest communities in west-central North America were adapted to a wet-winter precipitation regime for most of the Cenozoic, and they subsequently struggled to meet water demands when winters became drier, resulting in the observed open habitat expansion.

  DOI

• Terrestrial climate in mid-latitude East Asia from the latest Cretaceous to the earliest Paleogene: A multiproxy record from the Songliao Basin in northeastern China

  Earth-Science Reviews · 2021 · 56 citations

  • Geology
  • Paleontology
  • Earth science
  PublisherDOI

• Drier winters drove Cenozoic open habitat expansion in North America

  2021

  Senior authorCorresponding
  • Computer Science
  • World Wide Web
  • Library science

  Earth and Space Science Open Archive This work has been accepted for publication in AGU Advances. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v2]Drier winters drove Cenozoic open habitat expansion in North AmericaAuthorsTylerKuklaiDJeremyCaves RugensteiniDDaniel EnriqueIbarraMatthewWinnickiDCaroline AEStrömbergiDPageChamberlainSee all authors Tyler KuklaiDCorresponding Author• Submitting AuthorStanford UniversityiDhttps://orcid.org/0000-0002-3413-0925view email addressThe email was not providedcopy email addressJeremy Caves RugensteiniDColorado State UniversityiDhttps://orcid.org/0000-0003-4123-3305view email addressThe email was not providedcopy email addressDaniel Enrique IbarraBrown Universityview email addressThe email was not providedcopy email addressMatthew WinnickiDUniversity of Massachusetts AmherstiDhttps://orcid.org/0000-0003-4237-9402view email addressThe email was not providedcopy email addressCaroline AE StrömbergiDDepartment of Biology and Burke Museum of Natural History and Culture, University of WashingtoniDhttps://orcid.org/0000-0003-0612-0305view email addressThe email was not providedcopy email addressPage ChamberlainStanford Universityview email addressThe email was not providedcopy email address

  DOI

Frequent coauthors

• Caroline A.E. Strömberg

  14 shared

• Jeremy K. Caves Rugenstein

  9 shared

• Daniel Ibarra

  Brown University

  7 shared

• Matthew Winnick

  University of Massachusetts Amherst

  5 shared

• Andreas Mulch

  Goethe University Frankfurt

  5 shared

• Tyler Kukla

  New Mexico Consortium

  5 shared

• Katharina Methner

  Leipzig University

  4 shared

• Çağan H. Şekercioğlu

  Koç University

  3 shared

Labs

• Vice Provost for Student AffairsPI

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