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

Consumption of drift kelp by intertidal populations of the sea urchin Tetrapygus niger on the central Chilean coast: possible consequences at different ecological levels
Rodríguez, S.R. (2003). Consumption of drift kelp by intertidal populations of the sea urchin Tetrapygus niger on the central Chilean coast: possible consequences at different ecological levels. Mar. Ecol. Prog. Ser. 251: 141-151
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630, more
Peer reviewed article  

Available in Author 

Keyword
    Marine

Author  Top 
  • Rodríguez, S.R., more

Abstract
    Drift algae are an important food resource for many intertidal marine invertebrates. This study quantifies the arrival rate of drift kelp on the intertidal zone of central Chile and analyses its nutritional role in maintaining populations of the sea urchin Tetrapygus niger. The analysis was based on stomach contents and on stable isotope ratios of the food and the sea urchin. Gonad development was also evaluated. Lessonia nigrescens was the kelp most commonly observed, and its arrival pattern showed both temporal and spatial variation. The highest levels of drift kelp occurred in late spring, early summer and part of the autumn. Lessonia spp. were the most important food of T. niger, comprising 68% of the diet, and most of the assimilated carbon came from this source. The availability of drift kelp influenced gonad development. Trophic subsidies such as drift kelp are clearly important to intertidal animals of temperate ecosystems and have effects at different levels of biological organization. Two alternative scenarios of community organization are proposed for tidepools, depending on drift kelp availability.

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