Stocks and dynamics of soil organic carbon and coarse woody debris in three managed and unmanaged temperate forests
Stocks and dynamics of soil organic carbon and coarse woody debris in three managed and unmanaged temperate forests
复制标题
三种管理和非管理温带森林土壤有机碳和粗木本碎片的储量和动态
DOI：
10.1007/s10342-016-1013-4
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发表时间：
2017
影响因子：
2.8
通讯作者：
W. Borken
中科院分区：
文献类型：
--
作者：
Inken Krueger;Christopher Schulz;W. Borken
森林保护对温带森林土壤有机碳(C)储量的影响很难研究。粗木质碎屑(CWD)是森林中重要的碳库，也是土壤碳输入的潜在来源。在此，我们在德国巴伐利亚州不同地质和气候地区的三个未经管理的森林和三个相邻的管理森林的林分水平上比较了CWD和土壤C的储量。CWD经过40-100年的积累，在未经管理的云杉林中获得了110万毫克/公顷的C-−1，在两个未经管理的山毛榉-栎林中分别获得了23和30毫克的C/C/−1。有机层的C储量在山毛榉林中较小(8和19 mg/hA−1)，而在云杉林中较大(36 0 mg/C/ha−1)。地上CWD储量的增加与未管理森林的有机层和矿物土壤中更多的C储量并不一致。然而，未经管理的和经管理的山毛榉-栎林的Oe和Oa地平线的放射性碳特征有所不同。我们将这些差异归因于部分较快的有机碳周转，这是受到未管理森林中更多的CWD投入的刺激。另一方面，由于间伐后凋落物质量较低或树种组成不同，管理森林中有机C的周转较慢。表层矿物土壤中水可提取的溶解有机碳(DOC)的放射性碳特征表明，CWD是有效的DOC来源。我们的结果表明，40-100年的森林保护年限太短，不能在林分水平上对森林土壤的碳储量和放射性碳特征产生显着变化。
The effect of forest conservation on the organic carbon (C) stock of temperate forest soils is hardly investigated. Coarse woody debris (CWD) represents an important C reservoir in unmanaged forests and potential source of C input to soils. Here, we compared aboveground CWD and soil C stocks at the stand level of three unmanaged and three adjacent managed forests in different geological and climatic regions of Bavaria, Germany. CWD accumulated over 40–100 years and yielded C stocks of 11 Mg C ha−1 in the unmanaged spruce forest and 23 and 30 Mg C ha−1 in the two unmanaged beech–oak forests. C stocks of the organic layer were smaller in the beech–oak forests (8 and 19 Mg C ha−1) and greater in the spruce forest (36 Mg C ha−1) than the C stock of CWD. Elevated aboveground CWD stocks did not coincide with greater C stocks in the organic layers and the mineral soils of the unmanaged forests. However, radiocarbon signatures of the Oe and Oa horizons differed among unmanaged and managed beech–oak forests. We attributed these differences to partly faster turnover of organic C, stimulated by greater CWD input in the unmanaged forest. Alternatively, the slower turnover of organic C in the managed forests resulted from lower litter quality following thinning or different tree species composition. Radiocarbon signatures of water-extractable dissolved organic carbon (DOC) from the top mineral soils point to CWD as potent DOC source. Our results suggest that 40–100 years of forest protection is too short to generate significant changes in C stocks and radiocarbon signatures of forest soils at the stand level.
影响因子：
4
作者：
Miltner, Anja;Bombach, Petra;Kaestner, Matthias
通讯作者：
Kaestner, Matthias