Effects of light intensity on litter decomposition in a subtropical region
Effects of light intensity on litter decomposition in a subtropical region
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亚热带地区光强对凋落物分解的影响
DOI：
10.1002/ecs2.1770
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发表时间：
2017-04-01
期刊：
影响因子：
2.7
通讯作者：
Tan, Bo
中科院分区：
文献类型：
--
作者：
Ma, Zhiliang;Yang, Wanqin;Tan, Bo
太阳光作为陆地生态系统过程的主要驱动力，不仅运行着合成过程，也运行着分解过程。在自然界中，土壤表面可能暴露在不同的光照强度下，但光照强度对土壤分解的影响尚不清楚。通过遮荫试验，研究了不同光照强度对西部亚热带地区落叶分解的影响。在2年的培养过程中，凋落物质量损失率因树种和光照强度的不同而不同，为54.46-100%，其中37.21-80.58%发生在雨季。光照强度对凋落物质量损失有显著影响，但其影响因树种和季节而异。遮荫处理促进了枯落物在旱季的分解，但抑制了枯落物在雨季的分解。光照强度、树种及其交互作用是影响亚热带地区凋落物分解的主要因子。
Sunlight, as a main driver of terrestrial ecosystem process, not only runs the synthesis, but also the decomposition. In nature, soil surface might be exposed to different light intensities, but the decomposition as affected by light intensity remains unknown. A shading experiment was conducted to simulate the effects of different light intensities on decomposition of foliar litter in a subtropical region of western China. Over two-year incubation, foliar litter mass lost 54.46–100% depending on tree species and light intensities, and 37.21–80.58% of mass losses occurred in rainy seasons. Light intensity gave strong effects on litter mass loss, but the effects varied with tree species and season. Shading treatments promoted the litter decomposition in the dry seasons, but inhibited the decomposition in the rainy seasons. Light intensity, tree species, and their interactions are the main factors regulating litter decomposition in subtropical regions.