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Wing loading, not terminal velocity, is the best parameter to predict capacity of diaspores for secondary wind dispersal.

Abstract：

:Lift-off velocity may be the most useful surrogate to measure the secondary dispersal capacity of diaspores. However, the most important diaspore attribute determining diaspore lift-off velocity is unclear. Furthermore, it is not known whether terminal velocity used to characterize the primary dispersal capacity of diaspores can also be used to predict their secondary wind dispersal capacity. Here, we investigate how diaspore attributes are related to lift-off velocity. Thirty-six species with diaspores differing in mass, shape index, projected area, wing loading, and terminal velocity were used in a wind tunnel to determine the relationship between diaspore attributes and lift-off velocity. We found that diaspore attributes largely explained the variation in lift-off velocity, and wing loading, not terminal velocity, was the best parameter for predicting lift-off velocity of diaspores during secondary wind dispersal. The relative importance of diaspore attributes in determining lift-off velocity was modified by both upwind and downwind slope directions and type of diaspore appendage. These findings allow us to predict diaspore dispersal behaviors using readily available diaspore functional attributes, and they indicate that wing loading is the best proxy for estimating the capacity for secondary dispersal by wind.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Liang W,Liu Z,Liu M,Qin X,Baskin CC,Baskin JM,Xin Z,Wang Z,Su Z,Zhou Q

doi

10.1093/jxb/eraa170

subject

Has Abstract

pub_date

2020-07-06 00:00:00

pages

4298-4307

issue

14

eissn

0022-0957

issn

1460-2431

pii

5815327

journal_volume

71

pub_type

杂志文章

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