IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Top-down control in a neritic plankton system by Aurelia aurita medusae - a summary
Schneider, G.; Behrends, G. (1998). Top-down control in a neritic plankton system by Aurelia aurita medusae - a summary. Ophelia 48(2): 771-82. hdl.handle.net/10.1080/00785236.1998.10428677
In: Ophelia: International Journal of Marine Biology. Ophelia Publications: Helsingør. ISSN 0078-5326, more
Peer reviewed article  

Available in Authors 

Keyword
    Aurelia aurita (Linnaeus, 1758) [WoRMS]

Authors  Top 
  • Schneider, G.
  • Behrends, G.

Abstract
    This paper summarizes earlier published results obtained for the scyphomedusa Aurelia aurita to elucidate the role of this species in the pelagic system of the Kiel Bight (western Baltic Sea). With the data now existing, it appears that the standing stocks of various plankton components are regulated by the medusae. Comparisons between different years show that increasing densities of A. aurita are associated with a sharp decline of mesozooplankton, a shift in species composition, and a pronounced increase of chlorophyll a and ultraplankton (< 15 pm) abundance. No changes were, however, observed for microphytoplankton (diatoms and dinoflagellates). A. aurita seems, therefore, to exert top-clown control over the plankton community and is considerably more important than previously supposed. The medusae influence, as a result of trophic cascading, the abundance and composition of both the secondary and the primary producers. Mass occurrence of medusae leads, however, to scanty food for themselves, smaller body size and another reproduction strategy compared with years poor in medusae.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors