Dataset: Ascidian coverage change from removal experiments in rocky intertidal Marine Protected Areas in the San Juan Islands from 2008-2011

Final no updates expectedVersion 2013-12-10 (2013-12-10)Dataset Type:Unknown

Principal Investigator: Kenneth Sebens (University of Washington Friday Harbor Laboratories)

BCO-DMO Data Manager: Nancy Copley (Woods Hole Oceanographic Institution)


Project: Effects of Marine Preserves on Rocky Subtidal Communities (Subtidal Preserves)

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


Related Datasets

No Related Datasets

Related Publications

Results

Elahi, R., & Sebens, K. P. (2013). Experimental Removal and Recovery of Subtidal Grazers Highlights the Importance of Functional Redundancy and Temporal Context. PLoS ONE, 8(11), e78969. https://doi.org/10.1371/journal.pone.0078969
Software

Bates, D., Maechler, M., & Bolker, B. (2013). lme4: Linear mixed-effects models using S4 classes. R package version 0.999999-2.