Linking top-down forces to the pleistocene megafaunal extinctions Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/vq27zp216

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Humans, in conjunction with natural top-down processes and through a sequence of cascading trophic interactions, may have contributed to the Pleistocene megafaunal extinctions. The arrival of the first humans, as hunters and scavengers, through top-down forcing, could have triggered a population collapse of large herbivores and their predators. We present evidence that the large mammalian herbivores of the North American Pleistocene were primarily predator limited and at low densities, and therefore highly susceptible to extinction when humans were added to the predator guild. Our empirical evidence comes from data on carnivore dental attrition, proboscidean age structure, life history, tusk growth rates, and stable isotopes from the fossil record. We suggest a research agenda for further testing of this hypothesis that will provide a more detailed comprehension of late Pleistocene megafaunal ecology, and thereby allow us to better understand and manage remaining megafauna
Resource Type
DOI
Date Available
Date Issued
Citation
  • Ripple, W. J., & Van Valkenburgh, B. (2010, July/August). Linking top-down forces to the pleistocene megafanal extinctions. BioScience, 60(7), 516-526. doi:10.1525/bio.2010.60.7.7
Series
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2011-07-27T18:07:47Z (GMT) No. of bitstreams: 1 bio.2010.60.7.pdf: 356342 bytes, checksum: 1849c9a09d50de7a7528c9ef9d73204d (MD5)
  • description.provenance : Submitted by Mary Phan (mpscanner@gmail.com) on 2011-06-09T16:32:07Z No. of bitstreams: 1 bio.2010.60.7.pdf: 356342 bytes, checksum: 1849c9a09d50de7a7528c9ef9d73204d (MD5)
  • description.provenance : Made available in DSpace on 2011-07-27T18:07:47Z (GMT). No. of bitstreams: 1 bio.2010.60.7.pdf: 356342 bytes, checksum: 1849c9a09d50de7a7528c9ef9d73204d (MD5) Previous issue date: 2010-07

Relationships

In Administrative Set:
Last modified: 07/11/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items