Experimentally increased snow depth affects high Arctic microarthropods inconsistently over two consecutive winters

Climate change induced alterations to winter conditions may affect decomposer organisms controlling the vast carbon stores in northern soils. Soil microarthropods are particularly abundant decomposers in Arctic ecosystems. We studied whether increased snow depth affected microarthropods, and if effe...

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Vydané v:	Scientific reports Ročník 12; číslo 1; s. 18049 - 12
Hlavní autori:	Krab, Eveline J., Lundin, Erik J., Coulson, Stephen J., Dorrepaal, Ellen, Cooper, Elisabeth J.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	London Nature Publishing Group UK 27.10.2022 Nature Publishing Group Nature Portfolio
Predmet:	631/158/2165 631/158/2445 631/158/670 704/106/694/2739 Arctic Regions Climate Change Climate Research Climatic conditions Collembola Ecology Ecosystem Ekologi Humanities and Social Sciences Klimatforskning multidisciplinary Science Science (multidisciplinary) Seasons Snow Snow accumulation Snow cover Snow depth Snowmelt Soil Soil fauna Soil temperature Soils Winter Arctic Regions Arctic region
ISSN:	2045-2322, 2045-2322
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Shrnutí:	Climate change induced alterations to winter conditions may affect decomposer organisms controlling the vast carbon stores in northern soils. Soil microarthropods are particularly abundant decomposers in Arctic ecosystems. We studied whether increased snow depth affected microarthropods, and if effects were consistent over two consecutive winters. We sampled Collembola and soil mites from a snow accumulation experiment at Svalbard in early summer and used soil microclimatic data to explore to which aspects of winter climate microarthropods are most sensitive. Community densities differed substantially between years and increased snow depth had inconsistent effects. Deeper snow hardly affected microarthropods in 2015, but decreased densities and altered relative abundances of microarthropods and Collembola species after a milder winter in 2016. Although increased snow depth increased soil temperatures by 3.2 °C throughout the snow cover periods, the best microclimatic predictors of microarthropod density changes were spring soil temperature and snowmelt day. Our study shows that extrapolation of observations of decomposer responses to altered winter climate conditions to future scenarios should be avoided when communities are only sampled on a single occasion, since effects of longer-term gradual changes in winter climate may be obscured by inter-annual weather variability and natural variability in population sizes.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	2045-2322 2045-2322
DOI:	10.1038/s41598-022-22591-5