Journal Title
Title of Journal: Mar Biol
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Abbravation: Marine Biology
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Publisher
Springer Berlin Heidelberg
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Authors: JeanMarc Gagnon Luc Beaudin Norman Silverberg Anne Mauviel
Publish Date: 2013/05/23
Volume: 160, Issue: 10, Pages: 2687-2697
Abstract
In vivo observations in laboratory mesocosms and aquaria accompanied with in situ photographic surveys have shown that the burrowing shrimp Calocaris templemani has a significant impact on bottom sediment dynamics and geochemistry in the St Lawrence Estuary This burrowing shrimp establishes and maintains complex semipermanent burrows made up of several interconnected ‘Ushaped’ galleries with generally four or more openings to the sediment surface In the Estuary at 345 m depth Calocaris average density was estimated at 34 individuals m−2 Observed individual burrows reached a maximum volume of 054 L C templemani displaces this volume of mostly anoxic sediments from the subsurface layers down to 15 cm to the sediment surface thereby obscuring some of the natural stratification patterns With an estimated turnover rate of about 8 L m−2 year−1 of sediment our calculations suggest that over a period of about 1875 years all the sediment to a depth of 15 cm will have been reworked by C templemani aloneThis study was made possible through financial support for postdoctoral research to the first author Département d’océanographie Université du Québec à Rimouski Institut MauriceLamontagne Fisheries and Oceans Canada MontJoli financial and logistical support to N Silverberg by the Institut MauriceLamontagne and a research grant Programme d’actions structurantes Université du Québec à Rimouski to A Mauviel We are grateful for the assistance received from the crew of the research vessel Fogo Isle this project would not have been possible without their hard work We are very thankful for the support and/or constructive suggestions provided by Bjorn Sundby Deborah Steele and Bernard Chenard Richard Larocque Denis Guay and Steve Trottier to name only a few of the devoted staff of Institut MauriceLamontagne that contributed to the Benthocosm Project and this study Finally we gratefully acknowledge the many helpful comments and suggestions received from Drs Eunice H Pinn and R James A Atkinson and two anonymous reviewers the completion of this paper has benefited substantially from their comments
Keywords:
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