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RECORD NUMBER: 126 OF 445

OLS Field Name OLS Field Data
Main Title Effect of Feeding by 'Yoldia limatula' on Bioturbation.
Author Bender, K. ; Davis, W. R. ;
CORP Author Environmental Research Lab., Narragansett, RI. ;Miljoestyrelsen, Copenhagen (Denmark).
Year Published 1984
Report Number ERLN-749 ;EPA/600/J-84/395;
Stock Number PB87-176988
Additional Subjects Feeding(Supplying) ; Clams ; Arctic Ocean ; Sediments ; Water temperature ; Suspended sediments ; Solids ; Reprints ; Yoldia limatula ; Bioturbation ; Deposit feeders
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB87-176988 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 16p
Abstract
Yoldia limatulais dominant bivalve in shallow soft bottoms of boreal arctic seas of North America and Europe. This species is a subsurface and surface deposit-feeder. Yoldia's feeding activities result in sediment resuspension through expulsion of loose pseudofaeces directly into the water column. Expelled solids ranging between 10-200 times its body weight daily contain the finer fraction of sediment as pseudofaeces and elongate faeces. Thus feeding results in a fine sediment suspension, a pelletized sediment interface (unstable) and a coarse-grained subsurface. The amount of sediment resuspended was proportional to body size for Yoldia up to 18 mm. Larger animals still expelled greater quantities of sediment per expulsion, however, the frequency of expulsions decreased. The quantity of resuspended sediment was also positively correlated with water temperature above the feeding threshold of 6-8C.