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dc.date.accessioned2021-02-16T08:29:06Z
dc.date.available2021-02-16T08:29:06Z
dc.date.issued2021-01-18
dc.identifierdoi:10.17170/kobra-202101283074
dc.identifier.urihttp://hdl.handle.net/123456789/12513
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.language.isoengeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectagroecologyeng
dc.subjectecosystem serviceseng
dc.subjectenvironmental scienceseng
dc.subjectgrassland ecologyeng
dc.subjectmicrobiologyeng
dc.subject.ddc570
dc.subject.ddc580
dc.titleSoil microbial properties of subalpine steppe soils at different grazing intensities in the Chinese Altai Mountainseng
dc.typeAufsatz
dcterms.abstractLong-term provision of ecosystem services by grasslands is threatened by increasing stocking densities. The functions of grassland ecosystems depend on a mutual relationship between aboveground and belowground biota. While the effects of increasing stocking density on plant biomass are well studied, little is known about its impact on soil microbial properties. To fill this knowledge gap a grazing experiment was conducted on a summer pasture in the Chinese Altai Mountains during the summers of 2014 and 2015 using a randomized block design with stocking densities of 0, 8, 16, and 24 sheep ha−1 replicated four times. After two summer grazing periods (each 56 days), topsoil samples (1–7 cm) were taken in September 2015 and analyzed for major physical, chemical, and microbial soil properties. Except for the metabolic quotient (qCO2; p < 0.05), the examined soil properties remained unaffected by the increasing stocking densities, likely due to high spatial variability. The qCO2 declined from 13.5 mg CO2–C g−1 microbial biomass C d−1 at zero grazing to 12.2 mg CO2–C g−1 microbial biomass C d−1 at a stocking density of 24 sheep ha−1. Low values of qCO2 indicate an aged and dormant microbial community that diverts less soil organic carbon (SOC) to catabolic processes within their cells, characteristic for C limiting conditions. The aboveground biomass affected by grazing intensity correlated positively with SOC (rs = 0.60, p = 0.015) and ergosterol (rs = 0.76, p = 0.001) pointing indirectly to the effect of stocking density. Additionally to the relatively high values of qCO2, highest values of SOC (39.2 mg g−1 soil), ergosterol (6.01 µg g−1 soil), and basal respiration (10.7 µg g−1 soil d−1) were observed at a stocking density of 8 sheep ha−1 indicating that a low grazing intensity is recommendable to avoid soil degradation.eng
dcterms.accessRightsopen access
dcterms.creatorGönster-Jordan, Sven
dcterms.creatorIngold, Mariko
dcterms.creatorJannoura, Ramia
dcterms.creatorBürkert, Andreas
dcterms.creatorJörgensen, Rainer Georg
dc.relation.doidoi:10.1038/s41598-021-81120-y
dc.subject.swdAgrarökologieger
dc.subject.swdÖkosystemdienstleistungger
dc.subject.swdUmweltwissenschaftenger
dc.subject.swdGrünlandger
dc.subject.swdMikrobiologieger
dc.type.versionpublishedVersion
dcterms.source.identifierEISSN 2045-2322
dcterms.source.journalScientific Reportseng
dcterms.source.volumeVolume 11
kup.iskupfalse
dcterms.source.articlenumber1653


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Namensnennung 4.0 International
Except where otherwise noted, this item's license is described as Namensnennung 4.0 International