Higher predation risk for insect prey at low latitudes and elevations

TitleHigher predation risk for insect prey at low latitudes and elevations
Publication TypeJournal Article
Year of Publication2017
AuthorsRoslin, T, Hardwick, B, Novotny, V, Petry, WK, Andrew, NR, Asmus, A, Barrio, IC, Basset, Y, Boesing, ALarissa, Bonebrake, TC, Cameron, EK, Dáttilo, W, Donoso, DA, Drozd, P, Gray, CL, Hik, DS, Hill, SJ, Hopkins, T, Huang, S, Koane, B, Laird-Hopkins, B, Laukkanen, L, Lewis, OT, Milne, S, Mwesige, I, Nakamura, A, Nell, CS, Nichols, E, Prokurat, A, Sam, K, Schmidt, NM, Slade, A, Slade, V, Suchanková, A, Teder, T, van Nouhuys, S, Vandvik, V, Weissflog, A, Zhukovich, V, Slade, EM
JournalScience
Volume356382336741
Issue6339
Pagination742 - 744
Date PublishedJul-05-2018
ISSN0036-8075
Abstract

Biotic interactions underlie ecosystem structure and function, but predicting interaction outcomes is difficult. We tested the hypothesis that biotic interaction strength increases toward the equator, using a global experiment with model caterpillars to measure predation risk. Across an 11,660-kilometer latitudinal gradient spanning six continents, we found increasing predation toward the equator, with a parallel pattern of increasing predation toward lower elevations. Patterns across both latitude and elevation were driven by arthropod predators, with no systematic trend in attack rates by birds or mammals. These matching gradients at global and regional scales suggest consistent drivers of biotic interaction strength, a finding that needs to be integrated into general theories of herbivory, community organization, and life-history evolution.

URLhttp://www.sciencemag.org/lookup/doi/10.1126/science.aaj1631
DOI10.1126/science.aaj1631
Short TitleScience