Show simple item record

dc.contributor.authorLiu Peng
dc.contributor.authorZha Tianshan
dc.contributor.authorJia Xin
dc.contributor.authorWang Ben
dc.contributor.authorGuo Xiaonan
dc.contributor.authorZhang Yuqing
dc.contributor.authorWu Bin
dc.contributor.authorYang Qiang
dc.contributor.authorPeltola Heli
dc.date.accessioned2018-02-26T09:38:31Z
dc.date.available2018-02-26T09:38:31Z
dc.date.issued2016
dc.identifier.urihttps://erepo.uef.fi/handle/123456789/6162
dc.description.abstractWinter soil respiration (Rs) is becoming a significant component of annual carbon budgets with more warming in winter than summer. However, little is known about the controlling mechanisms of winter Rs in dryland. We made continuous measurements of Rs in four microsites (non-crust (BS), lichen (LC), moss (MC), and a mixture of moss and lichen (ML)) in a desert shrub-land ecosystem northern China, to investigate the causes of Rs dynamics in winter. The mean winter Rs ranged from 0.10 to 0.17 µmol CO2 m−2·s−1 across microsites, with the highest value in BS. Winter Q10 (known as the increase in respiration rate per 10 °C increase in temperature) values (2.8–19) were much higher than those from the growing season (1.5). Rs and Q10 were greatly enhanced in freeze-thaw cycles compared to frozen days. Diurnal patterns of Rs between freeze-thaw and frozen days differed. Although the freeze-thaw period was relatively short, its cumulative Rs contributed significantly to winter Rs. The presence of biocrust might induce lower temperature, thus having fewer freeze-thaw cycles relative to bare soil, leading to the lower Rs for microsites with biocrusts. In conclusion, winter Rs in drylands was sensitive to soil temperature (Ts) and Ts-induced freeze-thaw cycles. The temperature impact on Rs varied among soil cover types. Winter Rs in drylands may become more important as the climate is continuously getting warmer.en
dc.language.isoENen
dc.publisherMDPI AGen
dc.relation.ispartofseriesForestsen
dc.relation.urihttp://dx.doi.org/10.3390/f7080161en
dc.rightsCC BY http://creativecommons.org/licenses/by/4.0/en
dc.subjectwinter soil respirationen
dc.subjectsoil crusten
dc.subjectfrozenen
dc.subjectfreeze-thaw cyclesen
dc.subjectQ10en
dc.titleDiurnal Freeze-Thaw Cycles Modify Winter Soil Respiration in a Desert Shrub-Land Ecosystemen
dc.description.versionpublished versionen
dc.contributor.departmentSchool of Forest Sciences, activitiesen
uef.solecris.id44076910en
dc.type.publicationinfo:eu-repo/semantics/articleen
dc.rights.accessrights© Authorsen
dc.relation.doi10.3390/f7080161en
dc.description.reviewstatuspeerRevieweden
dc.relation.articlenumber161en
dc.relation.issn1999-4907en
dc.relation.issue8en
dc.relation.volume7en
dc.rights.accesslevelopenAccessen
dc.type.okmA1en
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
uef.solecris.openaccessOpen access -julkaisukanavassa ilmestynyt julkaisu


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record