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Reality Checks on Microbial Food Web Interactions in Dilution Experiments: Responses to the Comments of Dolan and McKeon : Volume 1, Issue 1 (29/12/2004)

By Landry, M. R.

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Book Id: WPLBN0004020699
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Reality Checks on Microbial Food Web Interactions in Dilution Experiments: Responses to the Comments of Dolan and McKeon : Volume 1, Issue 1 (29/12/2004)  
Author: Landry, M. R.
Volume: Vol. 1, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2004
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Calbet, A., & Landry, M. R. (2004). Reality Checks on Microbial Food Web Interactions in Dilution Experiments: Responses to the Comments of Dolan and McKeon : Volume 1, Issue 1 (29/12/2004). Retrieved from http://www.ebooklibrary.org/


Description
Description: Integrative Oceanography Division, Scripps Institution of Oceanography, University of California at San Diego, 9500 Gilman Dr., La Jolla, California 92093-0227, USA. Microzooplankton grazing rate estimates by the dilution approach have recently been criticized as systematically biased in the direction of being overestimates of actual rates in nature, and particularly in the open oceans. This argument is based on observed mortality responses of ciliated protozoa to reduced food in several coastal experiments and a global extrapolation which assumes that all grazing in all ocean systems scales to the abundance of ciliates. We suggest that these conclusions are unrealistic on several counts: they do not account for community differences in open ocean and coastal systems; they ignore experimental direct evidence supporting dilution rate estimates in the open oceans, and they discount dilution effects on mortality as well as growth in multi-layered, open-ocean food webs. High microzooplankton grazing rates in open-ocean systems are consistent with current views on export fluxes and trophic transfers. More importantly, significantly lower rates would fail to account for the efficient nutrient recycling requirements of these resource-limited and rapid-turnover communities.

Summary
Reality checks on microbial food web interactions in dilution experiments: Responses to the comments of Dolan and McKeon

 

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