TY  - JOUR
AU  - Temperton, V.M.
AU  - Märtin, L.L.A.
AU  - Röder, D.
AU  - Lücke, A.
AU  - Kiehl, K.
TI  - Effects of four different restoration treatments on the natural abundance of 15N stable isotopes in plants
JO  - Frontiers in plant science: FPLS
VL  - 3
SN  - 1664-462X
CY  - Lausanne
PB  - Frontiers Media
M1  - PreJuSER-21191
SP  - 70
PY  - 2012
N1  - Record converted from VDB: 12.11.2012
AB  - δ(15)N signals in plant and soil material integrate over a number of biogeochemical processes related to nitrogen (N) and therefore provide information on net effects of multiple processes on N dynamics. In general little is known in many grassland restoration projects on soil-plant N dynamics in relation to the restoration treatments. In particular, δ(15)N signals may be a useful tool to assess whether abiotic restoration treatments have produced the desired result. In this study we used the range of abiotic and biotic conditions provided by a restoration experiment to assess to whether the restoration treatments and/or plant functional identity and legume neighborhood affected plant δ(15)N signals. The restoration treatments consisted of hay transfer and topsoil removal, thus representing increasing restoration effort, from no restoration measures, through biotic manipulation to major abiotic manipulation. We measured δ(15)N and %N in six different plant species (two non-legumes and four legumes) across the restoration treatments. We found that restoration treatments were clearly reflected in δ(15)N of the non-legume species, with very depleted δ(15)N associated with low soil N, and our results suggest this may be linked to uptake of ammonium (rather than nitrate). The two non-legume species differed considerably in their δ(15)N signals, which may be related to the two species forming different kinds of mycorrhizal symbioses. Plant δ(15)N signals could clearly separate legumes from non-legumes, but our results did not allow for an assessment of legume neighborhood effects on non-legume δ(15)N signals. We discuss our results in the light of what the δ(15)N signals may be telling us about plant-soil N dynamics and their potential value as an indicator for N dynamics in restoration.
LB  - PUB:(DE-HGF)16
C6  - pmid:22645597
C2  - pmc:PMC3355755
UR  - <Go to ISI:>//WOS:000208837900071
DO  - DOI:10.3389/fpls.2012.00070
UR  - https://juser.fz-juelich.de/record/21191
ER  -