Plant diaspore dispersal is a fundamental process affecting the development of forest
vegetation and its natural regeneration, especially with regard to typical woodland
species, which spread slowly and form short-term soil seed banks. Most of
these species have poor seed dispersal mechanisms, which is the major cause of
their very slow expansion.
The following questions were asked: (i) is there a relationship between the age of
a woodland and the presence of forest vascular plant species representing different
seed dispersal types; (ii) how do the proportions change between species representing
different seed dispersal types in relation to the age of woodland; (iii) what
factors determine the presence of species representing a given seed dispersal type;
(iv) which factors affect the presence and which ones influence the abundance of
selected woodland species? A multiple regression models were developed based
on data obtained from 144 woodland patches designated for the study. A probit
regression analysis was performed for selected species exhibiting various seed dispersal
models.
Woodland plants of all seed dispersal types show a significant relationship with
the age of woodland, starting from the strongest linkage: anemochores, myrmecochores,
endozoochores, epizoochores, barochores, autochores. As the woodland
ages, the proportion of forest myrmecochores and anemochores grows, whilst the
proportion of autochores, epizoochores and endozoochores shrinks. Results obtained
indicate that the direct proximity of ancient woodland has a major effect
on the occurrence of more poorly dispersing plants in recent woodlands, such as
myrmecochores and heavy anemochores.
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