The tumbleweed dispersal strategies are unusual among plants; most species disperse their seeds by other mechanisms. Many tumbleweeds (though by no means all) are ruderal species, opportunistic agricultural weeds. Tumbleweeds have been recorded in the following plant families:
The most obvious is temperature. If the air temperature is above 32Â°F snow and ice will start to melt, at or below 32Â° and it will remain frozen. Think about a popsicleâ¦ inside the freezer it stays frozen, outside it starts to melt. The amount of sunshine plays a big factor.
The reason the ice in the Antarctica does not melt away when sunlight shines upon it is because the whiteness of the ice reflects most of the light back into space. But as a r â¦ esult of global warming, much more ice are being melted now than before. And thus without the ice, more sea will appear.pproximately 100 cubic kilometers (24 cubic miles) of ice melts in Antarctica every year (NASA's Grace satellite). East Antarctica is a high, cold, desert plateau. Satelli â¦ te data show a little mass loss at the edges, but this is counterbalanced by a buildup of snow in the centre.