The effect of temperature on leaching and subsequent decomposition of dissolved carbon from inundated floodplain litter: implications for the generation of hypoxic blackwater in lowland floodplain rivers

Whitworth, K. L., Baldwin, D. S. and Kerr, J. L. (2014) The effect of temperature on leaching and subsequent decomposition of dissolved carbon from inundated floodplain litter: implications for the generation of hypoxic blackwater in lowland floodplain rivers. Chemistry and Ecology, 30 6: 491-500. doi:10.1080/02757540.2014.885019


Author Whitworth, K. L.
Baldwin, D. S.
Kerr, J. L.
Title The effect of temperature on leaching and subsequent decomposition of dissolved carbon from inundated floodplain litter: implications for the generation of hypoxic blackwater in lowland floodplain rivers
Journal name Chemistry and Ecology   Check publisher's open access policy
ISSN 0275-7540
1029-0370
Publication date 2014
Sub-type Article (original research)
DOI 10.1080/02757540.2014.885019
Open Access Status
Volume 30
Issue 6
Start page 491
End page 500
Total pages 11
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2015
Language eng
Abstract Dissolved organic carbon export from floodplain litter during flood events is an important energy subsidy for lowland rivers. Temperature affects both the release and decomposition of dissolved organic carbon from floodplain plant litter. Unseasonally warm flood conditions have resulted in the release and consumption of carbon at a rate so rapid that water column oxygen has been depleted, causing the death of aquatic organisms upon exposure to this 'hypoxic blackwater'. To date, there has not been a systematic investigation of the role of temperature on hypoxic blackwater dynamics. In a series of laboratory experiments, we investigated the temperature dependence of both leaching and decomposition of carbon from a common floodplain litter component in south-eastern Australia - the leaves of the river red gum Eucalyptus camaldulensis. The leaching rate increased with temperature and approximated Arrhenius kinetics. Additionally, the solubility of the leaf carbon increased substantially at temperatures above ∼25°C. The rate of organic carbon respiration also increased with temperature, and the relationship with temperature was approximately linear. These data can be used to improve models for the prediction of hypoxic blackwater risk.
Keyword Bioavailability
Eucalyptus camaldulensis
Leaf litter
River red gum
Modelling
Subsidies
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Mined Land Rehabilitation Publications
Non HERDC
 
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 18 Mar 2014, 16:17:56 EST by Janice Kerr on behalf of Centre For Mined Land Rehabilitation