Liming upland grassland; the effects on earthworm communities and the chemical characteristics of carbon in casts

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doi: 10.1111/j.1365-2389.2007.01009.x
Authors:Bishop, H. O.; Grieve, I. C.; Chudek, J. A.; Hopkins, D. W.
Author Affiliations:Primary:
University of Stirling, School of Biological and Environmental Sciences, Stirling, United Kingdom
University of Dundee, United Kingdom
Volume Title:European Journal of Soil Science
Source:European Journal of Soil Science, 59(3), p.526-531. Publisher: Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, Oxford, United Kingdom. ISSN: 1351-0754
Publication Date:2008
Note:In English. 26 refs.; illus., incl. 3 tables
Summary:Different earthworm species have different tolerances of acid soil conditions, and the application of lime to upland grassland to improve the grazing quality may therefore alter the size and diversity of the earthworm community. Altering soil properties may also affect the chemical characteristics of organic C in earthworm casts. The earthworm community of upland grassland in S Scotland was surveyed at the outset of annual lime applications, and after 3 years, using 13C NMR spectroscopy to assess the distribution of C between different functional groups in the organic matter. In addition, soil was incubated for 8 weeks with several earthworm species in the presence or absence of lime, and the earthworm casts were subsequently analysed by 13C NMR spectroscopy. Liming did not significantly affect earthworm abundance or species diversity, but it did affect the chemical composition of the casts. Casts from earthworms incubated in unlimed soil had greater ratios of alkyl-C to O-alkyl-C, indicative of more decomposed, recalcitrant C, and spectra from litter-feeding species had the greatest intensities of O-alkyl-C signals. In limed soil, the largest O-alkyl-C signal intensities were not restricted to litter-feeding species, indicating an increase in the quality of organic matter ingested by geophagous species. [G.L.B.]
Subsections:Organic geochemistry; Petrology; weathering; soils
Subjects:Biogenic processes; Biota; Carbon; Casts; Chemical composition; Chemical properties; Communities; Ecology; Grasslands; Lime; Organic carbon; Organic compounds; Uplands; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Acid soils; Geophagus taxa; Sourhope Research Station; Southern Scotland
Coordinates:N553000 N553000 W0021500 W0021500
Abstract Numbers:08M/2287
Record ID:2016108132
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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