Skip Navigation



JPR Advance Access published online on April 25, 2007
Journal of Plankton Research, doi:10.1093/plankt/fbm033
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
29/6/515    most recent
fbm033v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Manca, M. M.
Right arrow Articles by Brown, M. E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Manca, M. M.
Right arrow Articles by Brown, M. E.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2007. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Shifts in phenology of Bythotrephes longimanus and its modern success in Lake Maggiore as a result of changes in climate and trophy

Marina M. Manca1,§, Magda Portogallo1 and Meghan E. Brown2

1 CNR ISTITUTO PER LO STUDIO DEGLI ECOSISTEMI, LARGO TONOLLI 52 28922 VERBANIA (VB) ITALY 2 HOBART & WILLIAM SMITH COLLEGES, DEPARTMENT OF BIOLOGY, GENEVA, NY 14456 USA

§ CORRESPONDING AUTHOR: e-mail: m.manca{at}ise.cnr.it

Received on December 14, 2006; revised on March 1, 2007; accepted on April 16, 2007


  Abstract

In Lake Maggiore, the density of the invertebrate predator Bythotrephes longimanus increased following lake re-oligotrophication in the late 1980s. This "invasion" was followed by dramatic changes in the pelagic food web, consistent with those that followed the establishment of B. longimanus in North American lakes where it is not native. In this contribution, we explore the modern success of B. longimanus in Lake Maggiore by investigating its phenology and population density, and their correlations with abiotic and biotic factors during the period from 1981-2003. A ten-fold increase in the abundance of B. longimanus followed an earlier start and longer duration of annual population growth. Increased prey resources and decreased predation pressure were not observed during the B. longimanus density increase. Instead, a rise in lake temperature may have altered the reproductive cycle of this species. Furthermore, the depth and duration of a refuge from visually-orienting fish predators increased during these twenty years, as a result of changes in the thermal stratification regime of the lake. This case study provides a timely example of how climatic changes may interact with biotic drivers (e.g. fish predation) to influence the density and phenology of an invertebrate predator.

Communicating Editor: R.P. Harris


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Phil Trans R Soc BHome page
B. Keller, J. Wolinska, M. Manca, and P. Spaak
Spatial, environmental and anthropogenic effects on the taxon composition of hybridizing Daphnia
Phil Trans R Soc B, September 12, 2008; 363(1505): 2943 - 2952.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.