Baseline isotope data for Spirodela sp.: nutrient differentiation in aquatic systems

Hill, Jaclyn M; Kaehler, Sven; Hill, Martin P

Title: Baseline isotope data for Spirodela sp.: nutrient differentiation in aquatic systems
Creator: Hill, Jaclyn M
Creator: Kaehler, Sven
Creator: Hill, Martin P
Subject: To be catalogued
Date Issued: 2012
Date: 2012
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/444502
Identifier: vital:74246
Identifier: https://doi.org/10.1016/j.watres.2012.03.063
Description: The excessive addition of nitrogen to watersheds is recognized as one of the main causes of the global deterioration of aquatic ecosystems and an increasing number of studies have shown that δ15N signatures of macrophytes may reflect the N-loading of the system under investigation. This study investigated isotopic equilibration rates and concentration level effects of KNO3 and cow manure nutrient solutions on the δ15N and δ13C signatures, C/N ratios, % N and % C of Spirodela sp. over time, to determine the feasibility of their use in monitoring anthropogenic N-loading in freshwater systems. Spirodela δ15N signatures clearly distinguished between nutrient types within 2 days of introduction, with plants grown in KNO3 showing extremely depleted δ15N values (−15.00 to −12.00‰) compared to those growing in cow manure (14.00–18.00‰). Isotopic equilibration rates could not be determined with certainty, but plant isotopic differentiation between nutrient regimes became apparent after 2 days and started to equilibrate by day 4. Concentration level effects were also apparent, with Spirodela tissue displaying more depleted and enriched δ15N values in higher concentrations of KNO3 and cow manure respectively.
Format: 10 pages
Format: pdf
Language: English
Relation: Water Research
Relation: Hill, J.M., Kaehler, S. and Hill, M.P., 2012. Baseline isotope data for Spirodela sp.: nutrient differentiation in aquatic systems. Water Research, 46(11), pp.3553-3562
Relation: Water Research volume 46 number 11 3553 3562 2012 0043-1354
Rights: Publisher
Rights: Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)

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Hill, Jaclyn Marie (Ms)

Kaehler, Sven (Dr)

RU DST/NRF SARChI for Insects in Sustainable Agricultural Ecosystems

Hill, Martin Patrick (Distinguished Professor)

RU Department of Botany

SDG 15. Life On Land

RU Department of Zoology and Entomology

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