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Marine Biology

, 164:76 | Cite as

Articulated coralline algae provide a spatial refuge to juvenile sea urchins from predatory crabs

  • Dara S. Yiu
  • Colette J. FeehanEmail author
SHORT NOTES

Abstract

Coralline algae provide settlement cues, food, and biotic structure for benthic marine invertebrates in intertidal and subtidal habitats. Here, we present evidence from laboratory experiments that juvenile sea urchins Strongylocentrotus droebachiensis (1.0–3.0 mm test diameter) are chemically attracted to articulated coralline algae Corallina vancouveriensis in the San Juan Archipelago (Washington, USA), resulting in movement of sea urchins into the algae. This behavior significantly reduced sea urchin mortality in the presence of predatory crabs Pagurus spp. and Cancer oregonensis as compared to treatments with no algae. In addition, we tested predation rates of various benthic predators from intertidal and subtidal habitats, and found that crabs were the most voracious predators of juvenile sea urchins. Our results indicate that C. vancouveriensis provides a spatial refuge to juvenile sea urchins from predatory crabs, and may facilitate recruitment into sea urchin populations by enhancing juvenile survival.

Keywords

Hermit Crab Coralline Alga Test Diameter Benthic Marine Invertebrate Spatial Refuge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We thank K. Dobkowski, M. Dethier, and T. Mumford for assistance with the collection of experimental organisms, A. Summers for providing laboratory facilities for experiments with O. maculatus, M. Van de Brooke and J. Huie for laboratory assistance, and Friday Harbor Laboratories for facilities access and logistical support. J. Ching provided the illustration in Fig. 1b. T. Carrier, K. Filbee-Dexter and 2 anonymous reviewers provided helpful comments on the manuscript. DSY received funding from the Mary Gates Endowment. CJF was supported by a Friday Harbor Laboratories Postdoctoral Fellowship.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest, that all animals have been sampled and treated according to national legislation, and that all required permissions have been obtained.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Friday Harbor LaboratoriesUniversity of WashingtonFriday HarborUSA
  2. 2.Department of Marine and Coastal SciencesRutgers UniversityNew BrunswickUSA

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