The spatial pattern and canopy-understory association of trees in a cool temperate, mixed forest in western Japan
The spatial pattern and canopy-understory association of trees in a cool temperate, mixed forest in western Japan
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日本西部凉温带混交林树木的空间格局和冠层-林下关联
DOI：
10.1007/bf02347788
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发表时间：
1996
影响因子：
2
通讯作者：
N. Akashi
中科院分区：
文献类型：
--
作者：
N. Akashi
以日本西部Ohdaigahara寒温带混交林的树冠分布为例，研究了林木的空间分布格局以及树冠与林下个体之间的关联性。在不同的空间尺度上，采用线样带和接触抽样的方法来检验这种格局。这些方法对于在大范围的研究区域内检测模式很有用。在陡峭的斜坡上形成大的斑块的优势种表明，该物种的分布是滑坡的结果。林下水曲柳呈丛生分布，其相对盖度在林隙内大于封闭林冠下。同龄冷杉林下个体与乔木下限呈正相关。与同种冠层个体呈负相关。这些模式表明，如果。龙须草在树冠缝隙中再生，并被一种植物取代。同性恋。这两个物种的动态与林隙动态过程是一致的。为了了解斑块形成的机制和森林树种的共存，必须对小尺度和大尺度干扰的影响进行评估。
The spatial distribution pattern of trees and the association between canopy and understory individuals were examined with reference to the distribution of tree crowns in a cool temperate, mixed forest in Ohdaigahara, western Japan. Line transect and contact sampling methods were used to examine the pattern over various spatial scales. These methods are useful to detect patterns over a large study area. The dominance ofChamaecyparis obtusaon steep slopes forming large patches suggested that the distribution of this species is a consequence of landslides. UnderstoryFagus crenatashowed a clumped distribution, and the relative coverage of this species was larger in canopy gaps than under a closed canopy. Understory individuals ofAbies homolepisshowed a positive association with canopy trees ofF. crenatabut a negative association with conspecific canopy individuals. These patterns suggested thatF. crenataregenerates in canopy gaps and is replaced byA. homolepis. The dynamics of these two species are consistent with the process of gap dynamics. The effects of both small- and large-scale disturbance must be evaluated to understand the mechanisms of patch formation and the coexistence of forest tree species.