Edge gradients provide evidence of ecological interactions in planktonic thin layers Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/73666605j

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Physical, optical, and acoustical data from Monterey Bay, California, USA, describing the distributions of phytoplankton, zooplankton, and small fish as well as gradients in the physical habitat were used to examine the interactions between vertically compressed plankton structures (thin layers), their consumers, and the local physical forces they experience. The relationship between upper and lower edge gradients of a layer were used to define layer ‘shape’. The steepness of the vertical gradient on the top vs. the bottom of the plankton layer was correlated to the difference in the relative abundance of consumers above and below the layer. Phytoplankton layer gradients were steeper when more zooplankton were present on one side of the layer vs. the other while zooplankton layers were more diffuse when a greater number of fish were adjacent to one side of the layer than the other. Both layer types showed nearly symmetrical gradients when predators were in low abundance or absent. Predator-associated differences in phytoplankton and zooplankton layer shape were not correlated with vertical gradients in shear or mixing potential surrounding layers. In the absence of strong physical gradients, grazers can play an important role in structuring plankton thin layers. These observations likely represent one end of a continuum of biological and physical forcing responsible for formation and maintenance of thin plankton layers.
Resource Type
Date Available
Date Issued
Citation
  • Limnol. Oceanogr., 54(4), 2009, 1382–1392
Table of Contents
  • Methods Results Discussion
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Kelly Benoit-Bird(kbenoit@coas.oregonstate.edu) on 2009-09-24T17:21:53Z (GMT) No. of bitstreams: 1 LimnolOceanogr_2009_ThinLayers.pdf: 1273211 bytes, checksum: 0f27453e9c3468765d92243f49fdc3b1 (MD5)
  • description.provenance : Made available in DSpace on 2009-09-24T17:21:53Z (GMT). No. of bitstreams: 1 LimnolOceanogr_2009_ThinLayers.pdf: 1273211 bytes, checksum: 0f27453e9c3468765d92243f49fdc3b1 (MD5) Previous issue date: 2009-04
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2009-09-24T17:20:53Z No. of bitstreams: 1 LimnolOceanogr_2009_ThinLayers.pdf: 1273211 bytes, checksum: 0f27453e9c3468765d92243f49fdc3b1 (MD5)
ISSN
  • 0024-3590

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items