Phytoplankton and photosynthetic light response in the coastal transition zone off northern California in June 1987 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/kh04dr21j

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • In June 1987 the geostropic flow in the coastal transition zone off northern California (between 50 and 150 km off the coast from Point Reyes to just north of Cape Mendocino) was dominated by a well-defined, southward-meandering current. Three vertical sections are presented that show the hydrographic structure of the current down to 100 m and its relationship to the distribution of phytoplankton biomass. The sections show that the geostrophic adjustment brought cold, saline, deep water up to the surface on the low steric height, or cold side of the flow, and that this upwelled water supported a relatively large diatom biomass (chlorophyll-a concentrations between 1 and 10 mg m-3). We present particle size spectra and photomicrographs of the phytoplankton that show that the diatom biomass was dominated by chain-forming species (e.g., Skeletonema costatum, Chaetoceros spp., Thalassiosira spp., and Rhizosolenia alata, but also a single-celled Actinocyclus sp.). Photosynthetic light response measurements reveal that these diatom communities were capable of high photosynthetic rates (Pmax between 5 and 25 mg C mg Chla-1 h-1). Although most of the diatoms were located in cold, slow-moving water on the low side of the current, some were being carried downstream. High chlorophyll concentrations were observed at depths > 75 m in and along the cold edge of the flow in all of our sections; we show evidence that in tow out of three cases this was the result of water mass subduction.
Resource Type
Date Available
Date Issued
Citation
  • Hood, R.R., Mark R. Abbott, and Adriana Huyer, 1991, Phytoplankton and photosynthetic light response in the coastal transition zone off northern California in June 1987, J. Geophys. Res., 96, 14,769–14,780.
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Language
Replaces
Additional Information
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-04-14T00:30:59Z No. of bitstreams: 1 Hood Abbott Huyer JGR 1991.pdf: 3564826 bytes, checksum: 88d0b0d29b4aa922c7bb17e7be54157f (MD5)
  • description.provenance : Approved for entry into archive by Mark Abbott(mark@coas.oregonstate.edu) on 2010-04-14T00:49:23Z (GMT) No. of bitstreams: 1 Hood Abbott Huyer JGR 1991.pdf: 3564826 bytes, checksum: 88d0b0d29b4aa922c7bb17e7be54157f (MD5)
  • description.provenance : Made available in DSpace on 2010-04-14T00:49:23Z (GMT). No. of bitstreams: 1 Hood Abbott Huyer JGR 1991.pdf: 3564826 bytes, checksum: 88d0b0d29b4aa922c7bb17e7be54157f (MD5) Previous issue date: 1991
ISSN
  • 0148-0227

Relationships

In Administrative Set:
Last modified: 07/24/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items