caa a22 4500 606218327 CHVBK 20210128101112.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11104-014-2317-0 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2317-0 Soil microbial C and N turnover under Cupressus lusitanica and natural forests in southern Ethiopia assessed by decomposition of 13C- and 15 N-labelled litter under field conditions [Elektronische Daten] [Marianne Benesch, Bruno Glaser, Michaela Dippold, Wolfgang Zech] Aims: Natural forests in Ethiopia are frequently replaced by Cupressus lusitanica plantations, but little is known about consequences of this land use change for soil C and N dynamics. The objectives of the study were: (i) quantification of microbial incorporation of litter-derived C and N under field conditions, (ii) identification of forest management effects on microbial incorporation of litter-derived C and N and (iii) elucidation of soil moisture effects on microbial utilization of litter-derived C and N. Methods: Natural litter in the Munessa forest was replaced by 13C and 15 N labelled litter and its degradation was studied over 2years. Microbial incorporation of litter-derived C and N was measured by chloroform fumigation extraction and stable isotope analysis. Results: Most of the 13C and 15 N tracer remained in the litter or was incorporated into bulk soil, whereas soil microbial biomass showed minor incorporation. Silvicultural management practices influenced microbial litter-derived C utilization with increased microbial incorporation under wet soil conditions under plantations. Thinning of Cupressus trees led to increased litter decomposition during dry soil conditions. Conclusion: Soil humidity is the main influencing factor for microbial turnover of litter-derived C in this ecosystem. Fast-growing tree plantations had no negative effects on microbial C and N turnover when compared to natural forests. Springer International Publishing Switzerland, 2014 Forest management nationallicence Soil microbial biomass nationallicence Stable isotope labelling nationallicence Tropical forestry nationallicence C and N cycling nationallicence Soil organic matter nationallicence Silvicultural management practices nationallicence Benesch Marianne Soil Physics Department, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut Glaser Bruno Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 3, D- 06120, Halle, Germany aut Dippold Michaela Department of Agroecosystem Research, BAYCEER, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut Zech Wolfgang Soil Science and Soil Geography, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 133-146 0032-079X 388:1-2<133 2015 388 11104 https://doi.org/10.1007/s11104-014-2317-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2317-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Benesch Marianne Soil Physics Department, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut NATIONALLICENCE 700 1- Glaser Bruno Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 3, D- 06120, Halle, Germany aut NATIONALLICENCE 700 1- Dippold Michaela Department of Agroecosystem Research, BAYCEER, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut NATIONALLICENCE 700 1- Zech Wolfgang Soil Science and Soil Geography, University of Bayreuth, Universitätsstraße 30, D- 95440, Bayreuth, Germany aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 133-146 0032-079X 388:1-2<133 2015 388 11104