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Measuring submerged macrophyte standing crop in shallow rivers: a test of methodology

Wood, Kevin A.; Stillman, Richard A.; Clarke, Ralph T.; Daunt, Francis; O’Hare, Matthew T.. 2012 Measuring submerged macrophyte standing crop in shallow rivers: a test of methodology. Aquatic Botany, 102. 28-33. 10.1016/j.aquabot.2012.04.006

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Abstract/Summary

High natural variability in space and time can make accurate measurements of macrophyte standing crop difficult. Accuracy of such measurements could be improved by quantifying the relationships between the different methods of measuring standing crop which are available to researchers. In this study we compare cover, volume, and biomass as measures of standing crop. Percentage cover, percentage volume, and dry weight biomass estimates were positively related (R2(adj) range = 54–96%), but these relationships were significantly different between sites, and to a lesser extent between months. Biomass was related (R2(adj) range = 18–73%) to stand height. Furthermore, cover, volume and biomass indicated different seasonal trends in standing crop at the two study sites. Our study presents a suite of standing crop measures that exhibit close congruence, can be measured efficiently and minimise destructive sampling in situ, attributes which will aid in the design and implementation of future macrophyte measurement protocols for shallow rivers.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.aquabot.2012.04.006
Programmes: CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 2 - Ecohydrological Processes
CEH Sections: Watt
ISSN: 0304-3770
Additional Information. Not used in RCUK Gateway to Research.: The attached document is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published Aquatic Botany, 102. 28-33. 10.1016/j.aquabot.2012.04.006 www.elsevier.com/
Additional Keywords: hydrophyte biomass, Ranunculus cover, plant volume index, submerged aquatic vegetation, chalk stream
NORA Subject Terms: Ecology and Environment
Hydrology
Botany
Date made live: 15 Jan 2013 13:03 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/21134

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