纵向和横向的光异质性沿着冷和温暖气温森林中二次继承的梯度
Tomonari Matsuo1,2, Tsutom Hiura3, Yusuke Onoda2
1Forest Ecology and Forest Management Group Wageningen University Wageningen The Netherlands.
概括
森林光的异质性随着年龄的增长而变化,在早期的继承中光线减弱更为,在晚期的继承中水平变化更为明显. 这些模式影响着森林结构和物种共存.
科学领域:
- 森林生态 森林生态
- 植物社区动态 植物社区动态
- 灯光环境研究 环境研究
背景情况:
- 光的可用性对森林生态系统至关重要,表现出显著的垂直和水平变化.
- 垂直光异质性与光竞争有关,而水平异质性可能表明利基分割.
- 森林结构,年龄和光异质性之间的相互作用仍未得到充分研究.
研究的目的:
- 在不同年龄和类型的森林中全面比较垂直和水平的光异质性.
- 调查森林结构与光异质性模式之间的关联.
主要方法:
- 在日本的17个森林 (冷温和热温) 中,从底层到树冠间隔1米测量了垂直光线配置文件.
- 在各台的量化水平光异质性.
- 记录主要树木的结构参数,包括胸高直径,高度和冠状尺寸.
主要成果:
- 纵向和水平的光异质性都在连续的梯度上系统地发生了变化.
- 较的垂直光衰减发生在早期的继承中,在晚期的继承中变得更加渐进.
- 在早期继承过程中,水平光异质性是最小的,在晚期继承过程中显著增加.
- 低温森林由于较短,较密集的树冠而表现出更明显的光衰减.
结论:
- 早期相继的更的光衰减可能会导致强烈的光竞争和自我稀释.
- 晚期继承的空间光异质性增加可能会通过光区分来促进物种共存.
- 了解光的异质性是理解森林动态和生物多样性的关键.
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