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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004645naa a2200505 4500
001oai:DiVA.org:su-171692
003SwePub
008190819s2019 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1716922 URI
0247 a https://doi.org/10.1016/j.soilbio.2019.05.0022 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Fuchslueger, Lucia4 aut
2451 0a Microbial carbon and nitrogen cycling responses to drought and temperature in differently managed mountain grasslands
264 1b Elsevier BV,c 2019
338 a print2 rdacarrier
520 a Grassland management can modify soil microbial carbon (C) and nitrogen (N) cycling, affecting the resistance to extreme weather events, which are predicted to increase in frequency and magnitude in the near future. However, effects of grassland management on microbial C and N cycling and their responses to extreme weather events, such as droughts and heatwaves, have rarely been tested in a combined approach. We therefore investigated whether grassland management affects microbial C and N cycling responses to drought and temperature manipulation. We collected soils from in situ drought experiments conducted in an extensively managed and an abandoned mountain grassland and incubated them at two temperature levels. We measured microbial respiration and substrate incorporation, as well as gross rates of organic and inorganic N cycling to estimate microbial C and N use efficiencies (CUE and NUE). The managed grassland was characterized by lower microbial biomass, lower fungi to bacteria ratio, and higher microbial CUE, but only slightly different microbial NUE. At both sites drought induced a shift in microbial community composition driven by an increase in Gram-positive bacterial abundance. Drought significantly reduced C substrate respiration and incorporation by microbes at both sites, while microbial CUE remained constant. In contrast, drought increased gross rates of N mineralization at both sites, whereas gross amino acid uptake rates only marginally changed. We observed a significant direct, as well as interactive effect between land management and drought on microbial NUE. Increased temperatures significantly stimulated microbial respiration and reduced microbial CUE independent of drought or land management. Although microbial N processing rates showed no clear response, microbial NUE significantly decreased at higher temperatures. In summary in our study, microbial CUE, in particular respiration, is more responsive to temperature changes. Although N processing rates were stronger responding to drought than to temperature microbial NUE was affected by both drought and temperature increase. We conclude that direct effects of drought and heatwaves can induce different responses in soil microbial C and N cycling similarly in the studied land management systems.
650 7a LANTBRUKSVETENSKAPERx Lantbruksvetenskap, skogsbruk och fiskex Markvetenskap0 (SwePub)401062 hsv//swe
650 7a AGRICULTURAL SCIENCESx Agriculture, Forestry and Fisheriesx Soil Science0 (SwePub)401062 hsv//eng
650 7a NATURVETENSKAPx Biologix Mikrobiologi0 (SwePub)106062 hsv//swe
650 7a NATURAL SCIENCESx Biological Sciencesx Microbiology0 (SwePub)106062 hsv//eng
650 7a NATURVETENSKAPx Biologix Ekologi0 (SwePub)106112 hsv//swe
650 7a NATURAL SCIENCESx Biological Sciencesx Ecology0 (SwePub)106112 hsv//eng
653 a Microbial metabolism
653 a Microbial carbon use efficiency
653 a Microbial nitrogen use efficiency
653 a Grassland
653 a Drought
653 a Temperature response
7001 a Wild, Birgitu Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi,University of Vienna, Austria4 aut0 (Swepub:su)bwild
7001 a Mooshammer, Maria4 aut
7001 a Takriti, Mounir4 aut
7001 a Kienzl, Sandra4 aut
7001 a Knoltsch, Anna4 aut
7001 a Hofhansl, Florian4 aut
7001 a Bahn, Michael4 aut
7001 a Richter, Andreas4 aut
7102 a Stockholms universitetb Institutionen för miljövetenskap och analytisk kemi4 org
7730 t Soil Biology and Biochemistryd : Elsevier BVg 135, s. 144-153q 135<144-153x 0038-0717x 1879-3428
8564 u http://pure.iiasa.ac.at/id/eprint/15896/1/1-s2.0-S0038071719301361-main.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-171692
8564 8u https://doi.org/10.1016/j.soilbio.2019.05.002

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