Dataset: urchin density
Deployment: Sebens_lab

Urchin density from removal expts. in rocky intertidal Marine Protected Areas, San Juan Islands
Principal Investigator: 
Kenneth Sebens (University of Washington, FHL)
BCO-DMO Data Manager: 
Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)
Current State: 
Final no updates expected
Version: 
2013-12-10
Version Date: 
2013-12-10
Description

In this study, we tested the hypothesis that red urchins (Strongylocentrotus franciscanus) and lined chitons (Tonicella spp.) are redundant in the maintenance of available space, defined here as encrusting algae and bare rock. In a factorial field experiment replicated at three sites, we reduced the densities of urchins and chitons for nine months. The effects of grazers were interpreted in the context of natural temporal variation by monitoring the benthic community one year before, during, and after grazer removal.

These data were published in Elahi & Sebens (2013).

Physical data - temperature, salinity, conductivity - can also be viewed online at http://nvs.nanoos.org/Explorer and http://depts.washington.edu/fhl/wx.html

Associated physical underwater and weather data:

See http://140.142.199.7/vdv/VV_Frame.php

More information about this dataset deployment