Structural characteristics of Abies mariesii saplings in a snowy subalpine parkland in central Japan.
Structural characteristics of Abies mariesii saplings in a snowy subalpine parkland in central Japan.
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日本中部亚高山雪地公园内冷杉树苗的结构特征。
DOI：
10.1093/treephys/27.1.141
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发表时间：
2007
期刊：
影响因子：
4
通讯作者：
Shigeaki F. Hasegawa
中科院分区：
文献类型：
--
作者：
A. Mori;Shigeaki F. Hasegawa
冷杉的结构特征桅杆。对日本中部白雪皑皑的亚高山公园里在阳光和阴凉处生长的树苗进行了评估，以推断树苗如何适应针叶树丛中较大个体的抑制以及极端多雪的条件。日照树苗和遮荫树苗产生结构不同的当年枝条，并将生物量分配给针叶和茎。与向阳树苗相比，遮荫树苗的单位枝条尺寸的针叶质量较低，这表明针叶堆积密度较低，并且通过避免针叶之间的相互遮蔽，可以更有效地利用有限的可用光线。向阳树苗和荫荫树苗侧枝内的生物量分配也不同。与阳树苗相比，遮荫树苗的针叶质量占枝条总质量的比例较小，尽管遮荫树苗保留针叶的时间较长，从而在一定程度上补偿了其针叶年产量较低的情况。因此，遮荫树苗需要付出高昂的机械成本来支撑其在这个白雪皑皑的栖息地中适应低光、明显扁平的树冠。抑制的树苗是白雪皑皑的亚高山公园中持久存在的针叶树丛的重要组成部分。观察到的 A. mariesii 树苗的结构特征确保了高耐荫性和耐雪性，有助于该物种在日本本州多雪的亚高山地区占据主导地位。
Structural characteristics of Abies mariesii M.T. Mast. saplings growing in sun and shade in a snowy subalpine parkland in central Japan were assessed to infer how saplings acclimate to suppression by larger individuals in a conifer clump and to extremely snowy conditions. Sun and shade saplings produced structurally different current-year shoots, and allocated biomass to needles and stem differently. Compared with sun saplings, shoots of shade saplings had lower needle mass per unit shoot size, which indicates less dense needle packing and more effective use of the limited available light by avoiding mutual shading among needles. Biomass allocation within lateral branches also differed between sun and shade saplings. Compared with sun saplings, needle mass was a smaller proportion of total branch mass in shade saplings although shade saplings retained needles for longer, thereby compensating, in part, for their lower annual production of needles. Thus shade saplings incur a high mechanical cost to support their low-light acclimated, conspicuously flattened crowns in this snowy habitat. Suppressed saplings are an important component of the persistent conifer clumps in snowy subalpine parklands. The observed structural characteristics of A. mariesii saplings, which ensure high shade- and snow-tolerance, contribute to the dominance of the species in snowy subalpine regions in Honshu, Japan.
影响因子：
3.7
作者：
A. Mori;H. Takeda
通讯作者：
A. Mori;H. Takeda
与冷杉和冷杉成熟冠层树冠内垂直位置相关的枝条特性的变化
DOI：
--
发表时间：
2005
期刊：
Forest Ecology and Management 10
影响因子：
--
作者：
Akira Mori
通讯作者：
Akira Mori