Compensatory growth in an aquatic plant mediates exploitative competition between seasonally tied herbivores Hidding, Bert, Nolet, Bart A., de Boer, Thijs, de Vries, Peter P. and Klaassen, Marcel 2009, Compensatory growth in an aquatic plant mediates exploitative competition between seasonally tied herbivores, Ecology, vol. 90, no. 7, pp. 1891-1899, doi: 10.1890/08-1218.1. Attached Files Name Description MIMEType Size Downloads Title Compensatory growth in an aquatic plant mediates exploitative competition between seasonally tied herbivores Author(s) Hidding, Bert Nolet, Bart A. de Boer, Thijs de Vries, Peter P. Klaassen, Marcel orcid.org/0000-0003-3907-9599 Journal name Ecology Volume number 90 Issue number 7 Start page 1891 End page 1899 Total pages 9 Publisher Ecological Society of America Place of publication Ithaca, N.Y. Publication date 2009-07 ISSN 0012-9658 1939-9170 Keyword(s) above- and belowground herbivory aquatic macrophytes Bewick's Swan compensation Cygnus columbianus bewickii exploitative competition herbivore tolerance Potamogeton pectinatus sago pondweed sequential density dependence The Netherlands waterfowl Summary The degree to which vertebrate herbivores exploitatively compete for the same food plant may depend on the level of compensatory plant growth. Such compensation is higher when there is reduced density-dependent competition in plants after herbivore damage. Whether there is relief from competition may largely be determined by the life-history stage of plants under herbivory. Such stage-specific compensation may apply to seasonal herbivory on the clonal aquatic plant sago pondweed (Potamogeton pectinatus L.). It winters in sediments of shallow lakes as tubers that are foraged upon by Bewick's Swans (Cygnus columbianus bewickii Yarrell), whereas aboveground biomass in summer is mostly consumed by ducks, coots, and Mute Swans. Here, tuber predation may be compensated due to diminished negative density dependence in the next growth season. However, we expected lower compensation to summer herbivory by waterfowl and fish as density of aboveground biomass in summer is closely related to photosynthetic carbon fixation. In a factorial exclosure study we simultaneously investigated (1) the effect of summer herbivory on aboveground biomass and autumn tuber biomass and (2) the effect of tuber predation in autumn on aboveground biomass and tuber biomass a year later. Summer herbivory strongly influenced belowground tuber biomass in autumn, limiting food availability to Bewick's Swans. In contrast, tuber predation in autumn by Bewick's Swans had a limited and variable effect on P. pectinatus biomass in the following growth season. Whereas relief from negative density dependence largely eliminates effects of belowground herbivory by swans, aboveground herbivory in summer limits both above- and belowground plant biomass. Hence, there was an asymmetry in exploitative competition, with herbivores in summer reducing food availability for belowground herbivores in autumn, but not the other way around. Language eng DOI 10.1890/08-1218.1 Field of Research 060202 Community Ecology (excl Invasive Species Ecology) Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2009, Ecological Society of America Persistent URL http://hdl.handle.net/10536/DRO/DU:30035086 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Life and Environmental Sciences Centre for Integrative Ecology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 30 May 2011, 10:59:22 EST Thu, 21 Jul 2011, 14:24:30 EST Thu, 21 Jul 2011, 14:26:29 EST Mon, 16 Jun 2014, 18:06:18 EST Thu, 11 Dec 2014, 17:05:58 EST Filtered Full Citation counts:   Cited 24 times in TR Web of Science Cited 24 times in Scopus Search Google Scholar Access Statistics: 607 Abstract Views, 1 File Downloads  -  Detailed Statistics Created: Mon, 30 May 2011, 10:59:21 EST

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