Interception by plant canopies during wind dispersal can affect the final destination of diaspores. However, how the interaction of wind speed, canopy type and diaspore attributes affects interception of diaspores by the plant canopy has rarely been studied. We investigated canopy interception for 29 species with different diaspore attributes, six canopy types and six wind speeds in controlled experiments in a wind tunnel. Shrub canopy interception of diaspores were controlled by wind speed and diaspore attributes, but the latter had a greater influence on canopy interception than the former. At low wind speed, diaspore wing loading had a large influence on canopy interception, whereas at high wind speed, diaspore projection area had a large influence. The chance of canopy interception at a particular wind speed was additionally affected by the type of canopy. This study increases our knowledge of the dispersal process, corrects the previous understanding of diaspore dispersal potential and improves the theoretical basis for predicting spatial pattern and dynamics of plant populations.

中文翻译：

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灌木冠层截留被风吹散的水铝石

在风吹散过程中被植物冠层截获会影响水散生的最终目的地。然而，很少有人研究风速、冠层类型和水铝石属性的相互作用如何影响植物冠层对水铝石的拦截。我们在风洞的受控实验中研究了 29 种具有不同水铝石属性、6 种树冠类型和 6 种风速的树冠拦截。灌木冠层截留水铝石受风速和水铝石属性控制，但后者对树冠截留的影响大于前者。在低风速下，水铝石翼载荷对冠层截留影响较大，而在高风速下，水铝石投影面积影响较大。在特定风速下树冠拦截的机会还受树冠类型的影响。本研究增加了我们对扩散过程的认识，纠正了以往对水铝石扩散潜力的认识，提高了预测植物种群空间格局和动态的理论基础。