I see you are once again using this forum on social media to advance your personal cause. I have googled you and this is an example of your technique. you take a small piece from the scientific literature out of context and use it to make an unsuportable claim.
• FROM SUEONMULL
• For information this is a quote from THE ECOLOGY OF RAGWORT (SENECIO JACOBAEA L.) - A REVIEW, the New Zealand paper often referred to:
"No study has yet investigated the influence of strong
winds on the long-distance disperal of ragwort seeds,
yet such winds, even if occasional, could still be highly
important. At Arthurs Pass and near Cass, isolated
ragwort plants may have been derived from seed
blown by strong north-west winds from the Westland
side of the main divide, possibly many kilometres (C.
Burrows, pers. comm.). Sheldon and Burrows (1973)
concluded that long distance dispersal of disc achenes
would occur only if the dispersal unit was carried high
into the atmosphere by convection currents."
There are other accepted seed dispersal mechanisms, specifically water courses and animals.
• JeanPaulDubois IN REPLY TO SUEONMULL
3 Aug 2014 16:51
3 4
But it is not fair to make an argument like this. The paragraph before the one you choose. It said.
"While large numbers of seeds are usually produced,
they appear to exhibit relatively poor disperal. Wind is
probably the major dispersal agent. An experiment
conducted by Poole and Cairns (1940) at Piopio,
which involved trays being set out at various distances
from a patch of ragwort plants to trap seed, found
that 60% of the seeds produced were released from
the seedhead, presumably by wind. The majority of
these were dispersed downwind from the prevailing
(north-easterly) direction, and mostly within a few
metres. An almost insignificant minority were
dispersed as far as 36.6 metres. The data show that
the dispersal pattern of ragwort seeds in space is
approximately elliptical, with the centre of the ellipse
a few metres downwind from the source of the seeds."
It is a New Zealand study. The plant there it is not native so any spread might be highly important because the invader is carried to new places. Here in Europe it is a natural plant. Some small number of seeds carried high by convection currents is invisible in effect. It is not to be thought of.
I search "quote mining" and I find it is what you do here. It is the tactic of the creationists, who take something small from something big to make it seem that they are right.
The other pages of that paper also say the seeds do not go far.
You do not use the context properly.
I find this good quote,
"Pseudoscientists often reveal themselves by their handling of the scientific literature. Their idea of doing scientific research is simply to read scientific periodicals and monographs. They focus on words, not on the underlying facts and reasoning."
All the underlying facts and reasoning in that paper says seeds do not normally go far by the wind.