Journal
JOURNAL OF SEA RESEARCH
Volume 50, Issue 1, Pages 77-83Publisher
ELSEVIER
DOI: 10.1016/S1385-1101(03)00040-6
Keywords
Arctica islandica; malacochronology; long-term growth; copepods; Continuous Plankton Recorder (CPR); northern North Sea; dendrochronology; time-series
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From samples collected in 1983, 1991 and 2000, a long-term growth record for the bivalve Arctica islandica from the northern North Sea was constructed with methods derived from dendrochronology. Subsequent response-function analyses demonstrated that shell growth was mainly influenced by the abundance of copepods as recorded by the CPR survey. In years with dense copepod populations a major part of the downward flux of food particles is intercepted by the copepods before it reaches the seafloor. This may lead to a shortage of food for A. islandica resulting in a depression of shell growth. Although the abundance of copepods in the northern North Sea is linked to climate there is only a weak statistical relation between shell growth and climate. (C) 2003 Elsevier B.V. All rights reserved.
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