Predators indirectly induce stronger prey through a trophic cascade

Proceedings. Biological Sciences
Arie J P SpyksmaRichard B Taylor

Abstract

Many prey species induce defences in direct response to predation cues. However, prey defences could also be enhanced by predators indirectly via mechanisms that increase resource availability to prey, e.g. trophic cascades. We evaluated the relative impacts of these direct and indirect effects on the mechanical strength of the New Zealand sea urchin Evechinus chloroticus We measured crush-resistance of sea urchin tests (skeletons) in (i) two marine reserves, where predators of sea urchins are relatively common and have initiated a trophic cascade resulting in abundant food for surviving urchins in the form of kelp, and (ii) two adjacent fished areas where predators and kelps are rare. Sea urchins inhabiting protected rocky reefs with abundant predators and food had more crush-resistant tests than individuals on nearby fished reefs where predators and food were relatively rare. A six-month long mesocosm experiment showed that while both food supply and predator cues increased crush-resistance, the positive effect of food supply on crush-resistance was greater. Our results demonstrate a novel mechanism whereby a putative morphological defence in a prey species is indirectly strengthened by predators via cascading predator effect...Continue Reading

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References

Aug 1, 1987·Nurse Education Today·J M Chavasse
Mar 1, 1969·Journal of Ultrastructure Research·J WeberR Roy
Jul 17, 1999·Trends in Ecology & Evolution·T FukamiJ A Drake
Nov 5, 1999·Trends in Ecology & Evolution·M L PaceJ F Kitchell
Aug 1, 2002·Proceedings of the National Academy of Sciences of the United States of America·Brian Reed Silliman, Mark D Bertness
Apr 18, 2006·Proceedings. Biological Sciences·Jens AnderssonTony Söderlund
May 17, 2006·Trends in Ecology & Evolution·Benjamin G MinerRick A Relyea
Mar 7, 2009·Ecological Applications : a Publication of the Ecological Society of America·Nick T ShearsAnne K Salomon
Oct 23, 2009·Proceedings. Biological Sciences·Paul E Bourdeau
Jan 29, 2011·Journal of Evolutionary Biology·C E GrueberI G Jamieson
Feb 7, 2014·Proceedings. Biological Sciences·Thomas A EbertSabrina Clemente

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