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Re: Extinction scenarios



this does sound a little extreme.  With much of the large herbiverous
seed dispersers gone, how do you rehabitat medium and large-sized
fruiting plants such as roses, berry bushes, dates, and figs (were these
present both sides of the KT?)  Bird and small mammal action alone?

Some arborial plants such as in rainforests would seem to have NO
chances of survival if ALL trees are felled.  Orchids are notoriuosly
fussy about habitats.

-Betty Cunningham

Augustus T. White wrote:
> extinct.  With most vegetation killed off initially, and nothing to hold it
> in place, the soil has sorted by elevation, according to particle size.
>  Hills are largely bare rock.  Depressions have collected fine particles
> and are beginning to grow sizeable tangles of brush.  There are no large
> trees, although some are growing back.  In the main these are fast-growing
> species with shallow root systems, easilly knocked over by storm or
> frequent flash floods.  Still, there is a small forest of sorts growing
> around the rim of depressions.  With a fair amount of still water, there
> are clouds of insects in the brush.  Many amphibian and freshwater
> populations are exploding as a result of the good food supply and cover.
> 
> The savannah and forest biomes whre their larger cousins used to hang out
> have been decimated.  There's a lot of howling desert out there.  Ground
> plants are beginning to recover, but there isn't the even distribution of
> plant biomass that used to support herd animals.  Gone with the herd
> animals are, of course, the top predators.  Life is more concentrated in
> smaller patches.  Some solitary ankylosaurs graze along riverene
> greenbelts, but floods and mammals are making egg-laying hazardous for
> non-flying species in the restricted space of lake and river-margin biomes.