Predator‐induced Plasticity

Abstract

Predator‐induced plasticity is an important mechanism enabling prey survival in complex environments. Prey alter a diversity of traits including behaviour, morphology and life history in response to predators to reduce their risk of predation. However, predator‐induced plasticity has associated costs including reduced competitive ability. To maximise fitness, prey modulate their phenotypic responses to the level of predation risk in the environment. Prey detect differences in predator densities or predators consuming more prey and track temporal variation in predation risk. Prey also detect different predator species in the environment and form predator‐specific defences. In aquatic systems, prey possess sophisticated sensory systems that enable the detection of chemical cues released by damaged prey and predators. Predator‐induced plasticity also influences interactions within larger communities and can lead to trophic cascades.

Key Concepts:

  • Phenotypic plasticity is one mechanism organisms use to cope with environmental heterogeneity.

  • Environmental heterogeneity in predation risk favours the evolution of predator‐induced plasticity in a diversity of prey species.

  • Prey that express predator‐induced plasticity in behavioural, morphological and life history traits can reduce their likelihood of predation, but the responses have associated costs.

  • To maximise fitness, prey fine‐tune their defences based on predator species identity, predator density, amount of prey consumed by predators and the prey species being consumed.

  • The expression of predator‐induced plasticity can impact species interactions throughout food webs.

Keywords: inducible defences; environmental variation; developmental plasticity; multiple predators; costs; survival; trophic cascade; kairomones

Figure 1.

Predator‐induced plasticity. Typical (upper row) and predator‐induced (lower row) phenotypes of various organisms. The numbers beneath each column represent the percentage of organisms surviving predation when both induced and uninduced individuals are exposed to lethal predators (in various assays). Data from Adler and Harvell and references cited therein.

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References

Adler FR and Harvell CD (1980) Inducible defences, phenotypic variability, and biotic environments. Trends in Ecology and Evolution 5: 407–410.

Arnqvist G and Johansson F (1998) Ontogenetic reaction norms of predator‐induced defensive morphology in dragonfly larvae. Ecology 79: 1847–1858.

Benard MF (2006) Survival trade‐offs between two predator‐induced phenotypes in Pacific treefrogs (Pseudacris regilla). Ecology 87: 340–346.

Brönmark C and Hansson LA (2000) Chemical communication in aquatic systems: an introduction. Oikos 88: 103–109.

Brönmark C and Miner JG (1992) Predator‐induced phenotypical change in body morphology in Crucian Carp. Science 258: 1348–1350.

Chalcraft DR and Resetarits WJ (2003) Predator identity and ecological impacts: functional redundancy or functional diversity? Ecology 84: 2407–2418.

Creel S, Winnie J, Maxwell B, Hamlin K and Creel M (2005) Elk alter habitat selection as an antipredator response to wolves. Ecology 86: 3387–3397.

Gabriel W, Luttbeg B, Sih A and Tollrian R (2005) Environmental tolerance, heterogeneity, and the evolution of reversible plastic responses. American Naturalist 166: 339–353.

Hoverman JT, Auld JR and Relyea RA (2005) Putting prey back together again: integrating predator‐induced behavior, morphology, and life history. Oecologia 144: 481–491.

Hoverman JT and Relyea RA (2007a) How flexible is phenotypic plasticity? Developmental windows for trait induction and reversal. Ecology 88: 693–705.

Hoverman JT and Relyea RA (2007b) The rules of engagement: how to defend against combinations of predators. Oecologia 154: 551.

Hoverman JT and Relyea RA (2009) Survival trade‐offs associated with inducible defences in snails: the roles of multiple predators and developmental plasticity. Functional Ecology 23: 1179–1188.

Lass S and Spaak P (2003) Chemically induced anti‐predator defences in plankton: a review. Hydrobiologia 491: 221–239.

Loose CJ and Dawidowicz P (1994) Trade‐offs in diel vertical migration by zooplankton: the costs of predator avoidance. Ecology 75: 2255–2263.

McIntosh AR and Peckarsky BL (1999) Criteria determining behavioural responses to multiple predators by a stream mayfly. Oikos 85: 554–564.

Nilsson PA, Bronmark C and Pettersson LB (1995) Benefits of a predator‐induced morphology in Crucian Carp. Oecologia 104: 291–296.

Relyea RA (2001) Morphological and behavioral plasticity of larval anurans in response to different predators. Ecology 82: 523–540.

Relyea RA (2003a) How prey respond to combined predators: a review and an empirical test. Ecology 84: 1827–1839.

Relyea RA (2003b) Predators come and predators go: the reversibility of predator‐induced traits. Ecology 84: 1840–1848.

Relyea RA and Auld JR (2004) Having the guts to compete: how intestinal plasticity explains costs of inducible defences. Ecology Letters 7: 869–875.

Roff DA (1996) The evolution of threshold traits in animals. Quarterly Review of Biology 71: 3–35.

Schmitz OJ, Beckerman AP and Obrien KM (1997) Behaviorally mediated trophic cascades: effects of predation risk on food web interactions. Ecology 78: 1388–1399.

Schmitz OJ, Krivan V and Ovadia O (2004) Trophic cascades: the primacy of trait‐mediated indirect interactions. Ecology Letters 7: 153–163.

Schoeppner NM and Relyea RA (2005) Damage, digestion, and defence: the roles of alarm cues and kairomones for inducing prey defences. Ecology Letters 8: 505–512.

Schoeppner NM and Relyea RA (2008) Detecting small environmental differences: risk‐response curves for predator‐induced behavior and morphology. Oecologia 154: 743–754.

Tollrian R (1993) Neckteeth formation in Daphnia pulex as an example of continuous phenotypic plasticity: morphological effects of Chaoborus kairomone concentration and their quantification. Journal of Plankton Research 15: 1309–1318.

Tollrian R and Dodson SI (1999) Inducible defenses in cladocera: constraints, costs, and multipredator environments. In: Tollrian R and Harvell CD (eds) The Ecology and Evolution of Inducible Defenses, pp. 177–202. Princeton, NJ: Princeton University Press.

Trussell GC and Nicklin MO (2002) Cue sensitivity, inducible defense, and trade‐offs in a marine snail. Ecology 83: 1635–1647.

Van Buskirk J, Anderwald P, Lupold S, Reinhardt L and Schuler H (2003) The lure effect, tadpole tail shape, and the target of dragonfly strikes. Journal of Herpetology 37: 420–424.

Van Buskirk J and Relyea RA (1998) Selection for phenotypic plasticity in Rana sylvatica tadpoles. Biological Journal of the Linnean Society 65: 301–328.

Werner EE and Peacor SD (2003) A review of trait‐mediated indirect interactions in ecological communities. Ecology 84: 1083–1100.

Further Reading

Dewitt TJ and Scheiner SM (2004) Phenotypic Plasticity: Functional and Conceptual Approaches. New York: Oxford University Press.

Dodson SI (1989) Predator‐induced reaction norms. BioScience 39: 447–452.

Karban R and Baldwin IT (1997) Induced Responses to Herbivory. Chicago, IL: University of Chicago Press.

Relyea RA (2004) Integrating phenotypic plasticity when death is on the line: insights from predator‐prey systems. In: Pigliucci M and Preston K (eds) The Evolutionary Biology of Complex Phenotypes, pp. 176–194. New York: Oxford University Press.

Schlichting CD and Pigliucci M (1998) Phenotypic Evolution: A Reaction Norm Perspective. Sunderland, MA: Sinauer.

Tollrian R and Harvell D (1999) The Ecology and Evolution of Inducible Defenses. Princeton, NJ: Princeton University Press.

West‐Eberhard MJ (2003) Developmental Plasticity and Evolution. New York: Oxford University Press.

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How to Cite close
Hoverman, Jason T(Oct 2010) Predator‐induced Plasticity. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1002/9780470015902.a0003305.pub2]