Dispersal processes have important effects on plant distribution
and abundance. Although adaptations to long range dispersal
(telechory) are by no means rare in desert plants, many desert
plant species do not possess any features to promote dispersal
(atelechory), while others have structures that hamper dispersal
(antitelechory). The high frequency with which atelechorous and
antitelechorous mechanisms are present in plants inhabiting arid
areas indicates the importance of these adaptations. Among the
benefits derived from these adaptations are the spreading of
germination over time, the provision of suitable conditions for
germination and subsequent seedling establishment, and the
maintenance of a reservoir of available seeds (seed bank). This
book describes the ways and means - anatomical, morphological and
ecological - by which dispersal in desert plants has evolved to
ensure the survival of these species in their harsh and
unpredictable environment.
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