Vegetation Mediates Soil Temperature and Moisture in Arctic-Alpine Environments
Vegetation Mediates Soil Temperature and Moisture in Arctic-Alpine Environments
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DOI：
10.1657/1938-4246-45.4.429
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发表时间：
2013-11-01
影响因子：
2
通讯作者：
Luoto, Miska
中科院分区：
文献类型：
--
作者：
Aalto, Juha;le Roux, Peter C.;Luoto, Miska
土壤温度和水分是决定北极高寒地区非生物和生物过程的关键因素。它们是了解气候变化下复杂生态系统动态的重要环节。本研究的目的是（1）量化细尺度土壤温度和土壤水分的变化，（2）评估植被对土壤温度和水分模式的影响，在北方欧洲北极高山环境。列入植被变量显着改善模型的土壤温度和湿度，尽管非生物变量（当地地形和土壤特性）是最有影响力的预测。在很短的距离（>= 1米）内，温度变化>= 5摄氏度，湿度变化>= 50%（体积含水量），反映了这些系统中热量和水文条件的极端空间异质性。因此，这些结果突出了非生物条件下的变化的生物调解，显示植被如何强烈影响当地的栖息地条件在北极高山环境中的精细空间尺度。
Soil temperature and moisture are key determinants of abiotic and biotic processes in arctic-alpine regions. They are important links to understanding complex ecosystem dynamics under changing climate. The aims of this study were to (1) quantify fine-scale soil temperature and soil moisture variation, and (2) assess the influence of vegetation on soil temperature and moisture patterns in a northern European arctic-alpine environment. Inclusion of vegetation variables significantly improved models of soil temperature and moisture, despite abiotic variables (local topography and soil properties) being the most influential predictors. Temperature varied by >= 5 degrees C and moisture by >= 50% (volumetric water content) over very short distances (>= 1 m), reflecting the extreme spatial heterogeneity of thermal and hydrological conditions in these systems. These results thus highlight the biotic mediation of changes in abiotic conditions, showing how vegetation can strongly affect local habitat conditions at fine spatial scales in arctic-alpine environments.