Lethal and nonlethal predator effects on an herbivore guild mediated by system productivity

Ecology
Earl E Werner, Scott D Peacor

Abstract

Indirect effects propagated through intervening species in a food web have important effects on community properties. Traditionally, these indirect effects have been conceptualized as mediated through density changes of the intervening species, but it is becoming increasingly apparent that those mediated through trait (phenotypic) responses also can be very important. Because density- and trait-mediated indirect effects have different properties, it is critical that we understand the mechanisms of transmission in order to predict how they will interact, and when or where they will be important. In this study, we examined the mechanisms and consequences of the lethal (density-mediated) and nonlethal (trait-mediated) effects of a larval odonate predator on a guild of four herbivore species (a larval anuran and three species of snails) and their resources. We also manipulated system productivity in order to explore the effects of environmental context on the transmission of these two types of indirect effects. We show that trait-mediated effects arising from the predator can be very strong relative to density-mediated effects on both the competing herbivores and the species composition and production of their resources. A number o...Continue Reading

References

Mar 22, 2001·Proceedings of the National Academy of Sciences of the United States of America·S D Peacor, E E Werner

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Citations

Oct 31, 2009·Oecologia·Renée P Prasad, William E Snyder
Jun 16, 2009·Experimental & Applied Acarology·Yasuyuki ChohJunji Takabayashi
May 15, 2010·Journal of Chemical Ecology·Yasuyuki Choh, Junji Takabayashi
Aug 31, 2013·PloS One·Rahmat Naddafi, Lars G Rudstam
Oct 9, 2015·Global Change Biology·Elizabeth M P MadinRobert R Warner
Oct 31, 2008·Ecology·Geoffrey C TrussellCatherine M Matassa
Mar 1, 2008·Trends in Ecology & Evolution·Michael R HeithausBoris Worm
Nov 30, 2013·The Journal of Animal Ecology·Nabil MajdiAntoine Lecerf
Oct 13, 2012·Scientific Reports·Yasuyuki ChohArne Janssen
Mar 9, 2011·Environmental Toxicology and Chemistry·Manuel E Ortiz-SantaliestraAdolfo Marco
Mar 28, 2020·The Journal of Animal Ecology·Michael J SheriffMaria Thaker
Mar 16, 2007·Ecology Letters·Toshinori Okuyama, Benjamin M Bolker
Apr 10, 2019·Proceedings. Biological Sciences·Ana L NunesJohn Measey
Jun 9, 2019·The Journal of Animal Ecology·Samantha J GallagherJason T Hoverman
Jul 22, 2019·Oecologia·Brittany M Jellison, Brian Gaylord
Feb 13, 2019·Trends in Ecology & Evolution·Kaitlyn M GaynorJustin S Brashares
Mar 24, 2021·American Journal of Primatology·Priscila SusckePatrícia Izar

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