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@ARTICLE{Smith:20813,
author = {Smith, M. and Conte, P. and Berns, A.E. and Thomson, J.R.
and Cavagnaro, T.R.},
title = {{S}patial patterns of, and environmental controls on, soil
properties at a riparian-padock interface},
journal = {Soil biology $\&$ biochemistry},
volume = {49},
issn = {0038-0717},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-20813},
pages = {38 - 45},
year = {2012},
note = {The authors wish to thank the landholder and the Riparian
Restoration Experiment team for access to the field site. We
particularly wish to thank A/Prof. Tony Patti for his
valuable advice and helping to bring the authors together.
We also thank Ms. Leesa Hughes for lab assistance, and
members of the "Cav-Lab" for valuable discussions. PC
acknowledges Forschungszentrum Julich GmbH (Germany) for
having financed him as visiting scientist at the NMR center
of the IBG-3: Agrosphere, Institute of Bio- and Geosciences.
Financial assistance for this research was provided by the
School of Biological Sciences, Monash University and the
Murray Darling Basin Authority. TRC also thanks the Monash
Research Accelerator Program for supporting these
activities.},
abstract = {Riparian zones are prominent features of agricultural
landscapes because they are the last point to intercept
nutrients and sediments before they enter water bodies. We
investigated the soil properties, nutrient dynamics and
vegetation composition at the riparian agriculture
interface. Soil physicochemical and vegetation properties
were spatially heterogeneous along the transition from the
grazed paddock into the un-grazed and revegetated riparian
zone. Soil C stocks varied considerably across the site,
with values ranging from $2\%$ in the paddock to $5\%$ in
the riparian zone. Using Bayesian model selection, a
predictive model for total soil carbon was developed. By
including soil moisture content and canopy cover in the
model, it was possible to predict total soil carbon with
$80\%$ accuracy at the site level and $87\%$ at the transect
level. This opens up the potential for total soil carbon
levels to be estimated by the quantification of easily
measured ecosystem properties. Analysis of the chemical
nature of the carbon in theses soils by solid state C-13 NMR
spectroscopy, showed the presence of more recalcitrant forms
of carbon in the revegetated riparian zone compared to the
grazed paddock. Spatial patterns of soil mineral N pools
were highly variable (NO4+ - N ranged from 1 to 5 mu g/g dry
soil; NO3- - N ranged from 0.4 to 2.2 mu g/g dry soil);
however, clear patterns in potentially mineralizable N (PMN)
were observed, with rates of PMN in the paddock being less
than half of those adjacent to the stream in the riparian
zone. Results are discussed in the context of the dynamic
nature of soil processes at the agriculture - riparian
interface, and the potential to develop models to predict
soil carbon using easily measurable vegetation and soil
properties. (c) 2012 Elsevier Ltd. All rights reserved.},
keywords = {J (WoSType)},
cin = {IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Soil Science},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000303423400006},
doi = {10.1016/j.soilbio.2012.02.007},
url = {https://juser.fz-juelich.de/record/20813},
}