Lee- No, the painting analogy didn't take...
I think John's point was that the wind vector isn't quite random, with prevailing winds providing a bias. That the seedbank was the primary source of seedlings, once the conditions for germination are present, and subsequent conditions for seedling growth and maturation. -Don > Date: Mon, 23 Nov 2009 10:03:37 -0600 > From: [email protected] > To: [email protected] > Subject: Re: [ENTS] global warming animals and plants > > Don: > > I think that in a warming dry climate trees die off rapidly at the > southern edge of their range, whereas in a warming wet climate, they die > slowly and are pushed out by species from further south that can use a > warm climate more efficiently. At the north edge there is expansion in > both cases due to many mechanisms of seed dispersal. I am not sure how > the pallette and painting analogy would work. > > Lee > > DON BERTOLETTE wrote: > > Lee- > > In discussing the migration of forest ecosystems up and down the North > > Rim (North Kaibab Plateau) with Dr. John Vankat (Ohio U., Miami; > > retired), it was clear to me that the primary vector of this migration > > wasn't Ent-like movements at night when nobody was looking, but the > > dying off live trees (retreating) at the ecotones, or the seedbank > > re-establishment of trees once there before (advancing). > > Without falling into a chicken and the egg conundrum, doesn't one have > > to assume that other vectors more or less random (wind carried seed, > > bird or animal carried seed) "laid out the palette, and climate > > painted the migrating forest ecosystems"? > > -Don > > > > > Date: Sun, 22 Nov 2009 11:24:50 -0600 > > > From: [email protected] > > > To: [email protected] > > > Subject: Re: [ENTS] global warming animals and plants > > > > > > Much of the response will be moving north along with the favored > > climate > > > for each species. Many animal species have moved north by a few hundred > > > miles in the last several decades. Trees are unable to respond as fast, > > > but recent studies show that young trees i the eastern U.S. are on > > > average 20-30 miles further north than mature trees for most species. > > > > > > Lee > > > > > > Sedore Demetriou wrote: > > > > Hi i'm doing a grade 7 project on how animals and plants would adapt > > > > to global warming ? > > > > > > > > > > > > > > -- > > > Eastern Native Tree Society http://www.nativetreesociety.org > > > Send email to [email protected] > > > Visit this group at http://groups.google.com/group/entstrees?hl=en > > > To unsubscribe send email to [email protected] > > > > ------------------------------------------------------------------------ > > Hotmail: Trusted email with Microsoft's powerful SPAM protection. Sign > > up now. > > <http://clk.atdmt.com/GBL/go/177141664/direct/01/%0Ahttp://clk.atdmt.com/GBL/go/177141664/direct/01/> > > > > -- > > Eastern Native Tree Society http://www.nativetreesociety.org > > Send email to [email protected] > > Visit this group at http://groups.google.com/group/entstrees?hl=en > > To unsubscribe send email to [email protected] > > -- > Eastern Native Tree Society http://www.nativetreesociety.org > Send email to [email protected] > Visit this group at http://groups.google.com/group/entstrees?hl=en > To unsubscribe send email to [email protected] _________________________________________________________________ Bing brings you maps, menus, and reviews organized in one place. http://www.bing.com/search?q=restaurants&form=MFESRP&publ=WLHMTAG&crea=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1 -- Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected]
