To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Copepods drive large-scal… - University of Gothenburg, Sweden Till startsida
Sitemap
To content Read more about how we use cookies on gu.se

Copepods drive large-scale trait-mediated effects in marine plankton

Journal article
Authors Erik Selander
E Carina Berglund
Pia Engström
Fredrik Berggren
Johan Eklund
S. Harðardóttir
N. Lundholm
Wiebke Grebner
Mats X. Andersson
Published in Science Advances
Volume 5
Publication year 2019
Published at Department of marine sciences
The Sven Lovén Centre for Marine Sciences
Department of Biological and Environmental Sciences
Language en
Links doi.org/10.1126/sciadv.aat5096
Subject categories Marine ecology

Abstract

Copyright © 2019 The Authors. Fear of predation may influence food webs more than actual predation. However, the mechanisms and magnitude of nonconsumptive predator effects are largely unknown in unicellular-dominated food webs such as marine plankton. We report a general mechanism of chemically induced predator effects in marine plankton. Copepods, the most abundant zooplankton in the oceans, imprint seawater with unique polar lipids—copepodamides—which trigger toxin production and bioluminescence in harmful dinoflagellates. We show that copepodamides also elicit defensive traits in other phytoplankton, inducing the harmful algal bloom-forming diatom Pseudo-nitzschia seriata to produce 10 times more toxins, and colony-forming diatoms to decrease colony size by half. A 1-year study in the northeast Atlantic revealed that natural copepodamide concentrations are high enough to induce harmful algal toxins and size reduction in dominant primary producers when copepods are abundant. We conclude that copepodamides will structure marine plankton toward smaller, more defended life forms on basin-wide scales.

Page Manager: Webmaster|Last update: 9/11/2012
Share:

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?