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Shrub expansion modulates belowground impacts of changing snow conditions in alpine grasslands
Ecology Letters ( IF 7.6 ) Pub Date : 2021-10-27 , DOI: 10.1111/ele.13903 Arthur A D Broadbent 1 , Michael Bahn 2 , William J Pritchard 1 , Lindsay K Newbold 3 , Tim Goodall 3 , Andrew Guinta 2 , Helen S K Snell 1 , Irene Cordero 1 , Antonios Michas 4, 5 , Helen K Grant 6 , David X Soto 6 , Rüdiger Kaufmann 2 , Michael Schloter 4, 5 , Robert I Griffiths 7 , Richard D Bardgett 1
Ecology Letters ( IF 7.6 ) Pub Date : 2021-10-27 , DOI: 10.1111/ele.13903 Arthur A D Broadbent 1 , Michael Bahn 2 , William J Pritchard 1 , Lindsay K Newbold 3 , Tim Goodall 3 , Andrew Guinta 2 , Helen S K Snell 1 , Irene Cordero 1 , Antonios Michas 4, 5 , Helen K Grant 6 , David X Soto 6 , Rüdiger Kaufmann 2 , Michael Schloter 4, 5 , Robert I Griffiths 7 , Richard D Bardgett 1
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Climate change is disproportionately impacting mountain ecosystems, leading to large reductions in winter snow cover, earlier spring snowmelt and widespread shrub expansion into alpine grasslands. Yet, the combined effects of shrub expansion and changing snow conditions on abiotic and biotic soil properties remains poorly understood. We used complementary field experiments to show that reduced snow cover and earlier snowmelt have effects on soil microbial communities and functioning that persist into summer. However, ericaceous shrub expansion modulates a number of these impacts and has stronger belowground effects than changing snow conditions. Ericaceous shrub expansion did not alter snow depth or snowmelt timing but did increase the abundance of ericoid mycorrhizal fungi and oligotrophic bacteria, which was linked to decreased soil respiration and nitrogen availability. Our findings suggest that changing winter snow conditions have cross-seasonal impacts on soil properties, but shifts in vegetation can modulate belowground effects of future alpine climate change.
中文翻译：
灌木扩张调节高山草原雪况变化对地下的影响
气候变化对山区生态系统产生了不成比例的影响，导致冬季积雪大量减少、春季融雪提前以及灌木广泛扩展到高山草原。然而，灌木扩张和雪况变化对非生物和生物土壤特性的综合影响仍然知之甚少。我们使用互补的田间试验表明，积雪减少和融雪提前对土壤微生物群落和功能产生影响，并持续到夏季。然而，与变化的雪况相比，金银花灌木的扩张调节了许多这些影响，并且具有更强的地下效应。艾瑞科灌木的扩张并没有改变积雪深度或融雪时间，但确实增加了艾瑞克菌根真菌和贫营养细菌的丰度，这与土壤呼吸和氮的有效性降低有关。我们的研究结果表明，冬季降雪条件的变化对土壤特性具有跨季节影响，但植被的变化可以调节未来高山气候变化的地下效应。
更新日期：2021-12-10
中文翻译：
灌木扩张调节高山草原雪况变化对地下的影响
气候变化对山区生态系统产生了不成比例的影响，导致冬季积雪大量减少、春季融雪提前以及灌木广泛扩展到高山草原。然而，灌木扩张和雪况变化对非生物和生物土壤特性的综合影响仍然知之甚少。我们使用互补的田间试验表明，积雪减少和融雪提前对土壤微生物群落和功能产生影响，并持续到夏季。然而，与变化的雪况相比，金银花灌木的扩张调节了许多这些影响，并且具有更强的地下效应。艾瑞科灌木的扩张并没有改变积雪深度或融雪时间，但确实增加了艾瑞克菌根真菌和贫营养细菌的丰度，这与土壤呼吸和氮的有效性降低有关。我们的研究结果表明，冬季降雪条件的变化对土壤特性具有跨季节影响，但植被的变化可以调节未来高山气候变化的地下效应。
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