Formation Mechanisms of Community Boundaries in Subalpine Coniferous Forests

亚高山针叶林群落边界的形成机制

• 批准号: 10640605
• 负责人: KOHYAMA Takashi
• 金额: $ 1.6万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640605/
• 关键词: coniferous forest; community boundary; model; regeneration patch; mosaic; demography; disturbance; Picea glehnii; 群衆境界; ライントランセクト

This study was carried out to examine the formation and dynamics of the mosaic landscape of forest stand types with clear boundaries in subalpine forests of Hokkaido, northern Japan.Main research site was set on the western slope of Mount On'nebetsu of Shiretoko Peninsula, eastern Hokkaido. The mosaic landscape made by pure stands of Picea glehnii, and mixed stands of Abies sachalinensis, P. glehnii and Betula ermanii was described. Detailed census of core of, and margin between these two stand types showed that the discontinuous stand boundaries were not related to the edaphic conditions that changed gradually along the boundaries. Dynamic sequence around boundaries was from Picea -pure stands to mixed stands. The replacement process was hypothesized to be related to species difference in tolerance against aggravation by snow deposit on crown together with wind. Another site investigated was a successional landscape on the slope of Mount Komagatake in southern Hokkaido. The dynamic pattern of the invasion of Larix kampferi was analysed using sequential aerial photographs.As a generalized modelling tool, a new simulator was proposed through this study. The model is based on the geographically extended model of stand-level tree size structure (Kohyama and Shigesada 1995) and on the shifting patch mosaic model of stands with tree size structure in gap-dynamic landscape of forest (Kohyama 1993). The response of latitudinal forest zonation was re-examined using the new simulator. Compared to the case without patch mosaic (I.e. Kohyama and Shigesada), the forest boundaries made by competitive interaction was predicted to move slightly faster, while still millennia time lag was the case after centennial global warming.

进行了这项研究以检查森林林木林类型的镶嵌景观的形成和动力学，在日本北部北海道的亚高山森林中具有明显的边界。描述了由Picea Glehnii纯净的镶嵌景观，以及Abies Sachalinensis，P。Glehnii和Betula Ermanii的混合林。核心的详细人口普查以及这两种林分类型之间的边缘表明，不连续的支架边界与沿边界逐渐变化的边缘条件无关。边界周围的动态序列是从picea -pure架到混合架。假设替代过程与风与风一起在皇冠上的雪矿床加重的耐受性差异有关。调查的另一个地点是北海道南部科马加塔克山的斜坡上的一个继任景观。使用顺序的空中照片分析了Larix Kampferi入侵的动态模式。作为一种广义的建模工具，通过这项研究提出了一种新的模拟器。该模型基于独立树大小结构的地理扩展模型（Kohyama and Shigesada，1995年），以及在森林间间隙动态景观中具有树大小结构的转换斑块镶嵌模型（Kohyama 1993）。使用新的模拟器对纬度森林分区的响应进行了重新检查。与没有斑块镶嵌的情况相比，竞争互动所产生的森林边界的移动速度稍快，而在百年全球变暖后仍然存在千年的时间滞后。

项目成果

TOSHIHIRO KONDO: "Natural regeneration patterns of the introduced larch,Larix kaempferi(Pinaceae),on the volcano Mount Koma,northern Japan"Diversity and Distributions. (in press). (1999)

Toshihiro KONDO：“日本北部科马火山上引入的落叶松、落叶松（松科）的自然再生模式”多样性和分布。

Takahashi, Koichi: "Size-structure dynamics of two conifers in relation to understorey dwarf bamboo : A simulation study."Journal of Vegetation Science. Vol.10. 833-842 (1999)

Takahashi, Koichi：“两种针叶树与下层矮竹的尺寸结构动态：模拟研究。”植被科学杂志。

Kondo, Toshihiro: "Natural regeneration patterns of the introduced larch, Larix kaempferi (Pinaceae), on the volcano Mount Koma, northern Japan"Diversity and Distributions. (in press). (1999)

Kondo Toshihiro：“日本北部科马火山上引入的落叶松、落叶松（松科）的自然再生模式”多样性和分布。

TOSHIRO KONDO: "Natural regeneration patterns of the introduced larch, Larix kaempferi (Pinaceae), on the volcano Mount Koma, northern Japan"Diversity and Distributions. 8. (1999)

TOSHIRO KONDO：“日本北部科马火山上引入的落叶松、落叶松（松科）的自然再生模式”多样性和分布。

Takahashi Koichi: "Size-structure dynamics of two conifers in relation to understoreydwarf bamboo : A simulation study"Journal of Vegetation Science. 10. 833-842 (1999)

高桥光一：“两种针叶树与下层矮竹的尺寸结构动态：模拟研究”植被科学杂志。