A Model of Mesodinium Rubrum Blooms in the Columbia River Estuary Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/4b29b781n

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Every year in the late summer, patches of the Columbia River estuary begin to turn red. These patches are blooms of mixotrophic ciliates (Myrionecta rubra or Mesodinium rubrum/major) (MR) that ingest the chloroplast of their prey, the cryptophytes (CR) Teleaulax amphioxeia (Peterson et al., 2013), and use the acquired organs to photosynthesize. The ecological cues that trigger this bloom and its impact on the estuary biogeochemistry are not fully understood. A one-dimensional five-component ecosystem model was applied and tested in a MATLAB framework. This paper describes sensitivity analyses of the model with respect to nitrate advection, MR and CR maximum uptake and mortality rates, and the rate of MR photosynthesis. The impact of vertical migration and the importance of the seed population were also considered. A set of parameters was selected to produce an optimal surface bloom of MR and CR comparable to the one observed in the chlorophyll-a and phycoerythrin measured at the south channel endurance station, SATURN 03, in 2010. Most of the parameters are positively correlated with the MR and CR bloom timing, duration, and peak. Due to the MR photoautotrophy dependence on their prey, parameters related to CR have the strongest impact on the MR bloom.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Advisor
Non-Academic Affiliation
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2015-06-09T13:43:55Z (GMT). No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) SherryElisabethJ2015.pdf: 2237722 bytes, checksum: e5146a593fb329036d4e3c284474098c (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2015-06-09T13:43:55Z (GMT) No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) SherryElisabethJ2015.pdf: 2237722 bytes, checksum: e5146a593fb329036d4e3c284474098c (MD5)
  • description.provenance : Submitted by Elisabeth Sherry (sherrye@onid.orst.edu) on 2015-06-09T00:00:33Z No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) SherryElisabethJ2015.pdf: 2237722 bytes, checksum: e5146a593fb329036d4e3c284474098c (MD5)

Relationships

In Administrative Set:
Last modified: 07/27/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items