Gap dynamics in climaxFagus crenata forests
Gap dynamics in climaxFagus crenata forests
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顶峰水青冈森林的间隙动态
DOI：
10.1007/bf02488116
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Shin‐ichi Yamamoto
中科院分区：
文献类型：
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作者：
Shin‐ichi Yamamoto
研究了日本几种顶极毛茛林的林隙特征和林隙更新。共发现278个缺口。缺口占20.05公顷土地总面积的12%。林隙密度为每公顷13.9个林隙，平均林隙面积为92.0平方米。较小的差距比较大的差距更频繁。大于400平方米的差距是罕见的。大部分的空隙是由单棵树的死亡造成的。冠层树木死亡更经常站立或折断树干比连根拔起，虽然连根拔起的树木相对丰富的网站与土壤排水不良，在网站上的上坡。不同树种林隙更新行为存在差异。crenata在林隙中的更新是从林隙形成前的幼树开始的，它不仅可以取代自己的林隙，而且可以取代其他物种的林隙。除F. crenata和Magnolia obovata不能在各自的林隙中更新。F.尽管在很宽的林隙范围内都能更新，但在小于200 m2的林隙中也能发生。而F.冠层中的crenata似乎阻止了它的成功更新。其他物种的间隙再生没有明显依赖于一个物种特异性的间隙大小。
Gap characteristics and gap regeneration were studied in several climaxFagus crenata forests in Japan. 278 gaps were observed. Gaps covered 12% of the total land area of 20.05 ha. Gap density was 13.9 gaps per ha and, mean gap size was 92.0 m2. Smaller gaps were much more frequent than larger ones. Gaps larger than 400 m2 were rare. Most gaps were created by the death of single trees. Canopy trees died more often standing or with broken trunks than by uprooting, although uprooted trees were relatively abundant in the site with poor soil drainage and in the site on upper slope. Differences of gap regeneration behaviour were recognized among tree species.F. crenata regenerates in gaps from saplings recruited before gap creation and can replace not only its own gaps but also gaps of other species. Most species other thanF. crenata andMagnolia obovata could not regenerate in their own gaps. More successful regeneration ofF. crenata may occur in gaps smaller than 200 m2, althought it regenerated in a wide range of gap size. However, increased relative density ofF. crenata in the canopy layer seems to prevent its successful regeneration. Gap regeneration of other species did not clearly depend on a species-specific gap size.