A model of trophic evolutionary pathways Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2514nn97c

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Calow (1983) realized that differences between parasites and their free-living relatives can be explained by the differences in nutrient richness. I propose a model that is based on Calow's idea which identifies the relative position of different trophic strategies (e.g. predation, grazing, parasitism and others) based on (1) the differences by which consumers arrive at their intrinsic rate of growth, and (2) the ecological impact they inflict on their hosts. I hypothesize that trophic interactions can be clarified if a parameter is included that takes into account the host's/prey's fate in the interaction. Moreover, this model suggests specific trophic evolutionary pathways (TEPs) between each strategy, and suggests that some pathways are more likely than others. In particular, parasitoidism is believed to be a highly derived strategy, and the TEPs presented in the model suggest parasitoidism could have arisen from either a predator-like or a typical-parasitic ancestor. Though the trophic categories determined by the model seem intuitive, this approach does provide, apparently for the first time, an objective, mathematically and ecologically useful basis for classifying animal trophic relationships.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2012-09-24T21:06:09Z No. of bitstreams: 1 MorrisAKimo1998.pdf: 5041057 bytes, checksum: 19144fb233586938af5536418c88f452 (MD5)
  • description.provenance : Made available in DSpace on 2012-09-25T17:27:42Z (GMT). No. of bitstreams: 1 MorrisAKimo1998.pdf: 5041057 bytes, checksum: 19144fb233586938af5536418c88f452 (MD5) Previous issue date: 1997-05-30
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-09-25T17:27:42Z (GMT) No. of bitstreams: 1 MorrisAKimo1998.pdf: 5041057 bytes, checksum: 19144fb233586938af5536418c88f452 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-09-25T17:26:09Z (GMT) No. of bitstreams: 1 MorrisAKimo1998.pdf: 5041057 bytes, checksum: 19144fb233586938af5536418c88f452 (MD5)

Relationships

In Administrative Set:
Last modified: 08/03/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items