[Aroid-l] When is a rain forest not a rain forest?

From: pjm at gol.com (Peter Matthews) on 2008.05.02 at 00:10:16(17523) Dear Steve, Maybe rainforests can gracefully mutate from one thing to another over time, and according to circumstances. In eastern Australia, there has been a long-term tussle between coastal rainforests (temperate to tropical) and the dry inland forests, which also vary from north to south. As a result, in the vicinity of coastal northern New South Wales, temperate to tropical rainforest elements encounter temperate to tropical dry forests, and a complex mosaic of different forest types can be seen over very short distances. The mosaics have their own kind of beauty, when seen from the air (even if pure rainforests exist, we should not regard them as the only kind of beauty). The mosaics may be created by fire and drought allowing dry forests to penetrate the rainforest areas, and by the opposite allowing rainforest to penetrate the dry forest areas. Pyromaniacal humans have had a hand in this over thousands of years, and probably also in central America, and in areas of Asia where tropical moonsoon regions have boundaries with temperate seasonal regions. I guess the herbs just have to do the best they can, while forest the and climate changes around them. I wonder what aroid seeds look like in arid and fire-prone areas. Peter +More On 5/1/2008, "Marek Argent" wrote: >Steve, > >You are right, in North America there are no rainforests, only deciduous subtropical forest, in Panama or Southern Mexico down throught Brazil and other Southamerican countries you can find evergreen tropical rainforest, the same in Asia, down to about 20 deg. of N latitude there are deciduous forests and where the monsoon climate begins there equally start the rain forest. And of course it also depends from the subclimate, when it's dry and cold of too hot, the rainforest od not occur at all (like Sahara in Africa), the rainforest are present only in the narrow area between the tropics, the equatorial Africa. >Every continent except Europe (and Antarctica :) ) has it's own belt of tropical rainforest. It is always cut by the Ecuator, then there are deserts, priairies and similar dry bioms, and as we go longer there are deciudous leaf-bearing (?) forest gradually replaced by the coniferous evergreens taygah. Also rainforest do do not occur in high mountains even when the latitude could allow them to grow there. > ----- Original Message ----- > From: ExoticRainforest > To: Steve Lucas Exotic Rainforest > Sent: Thursday, May 01, 2008 9:49 AM > Subject: [Aroid-l] When is a rain forest not a rain forest? > > > Well, now I'm terribly confused! A note published on the Aroid l last night from Leo Martin, director of the Cactus and Succulent Society of America indicates Epiphyllum species are not rain forest plants. But they live in rain forests. "Steve - They aren't rain forest plants. I've seen some of them in Mexico. There are indeed cacti that are rain forest plants but Epiphyllum in general aren't, with the possible exception of E. chrysocardium. They are denizens of tropical deciduous forest. In other words, 4 months of summer rain, 8 months of no rain (but with normal nighttime dew.) Most (not all) of Mexico has this climate regime. I haven't been to Central America but there's plenty of tropical deciduous forest there too." > > This dilemma appears to involve the definition of what is and isn't a rain forest. I've read many times in Dr. Croat's material these forests are known to have dry, moist and wet regions and I thought I understood that. But now it appears I am left to consider plants that live in the dry region not to be rain forest plants. I'm really confused and obviously have a lot more to learn. But, I am trying. > > I spent a good deal of the night working Mr. Martin's note into the page and am doing my best to not take a position. I am not an expert and will not try to defend a position just because I don't understand all the ramifications. But this one is rattling my mind! > > http://www.exoticrainforest.com/Epiphyllum%20phyllanthus%20subsp.%20phyllanthus%20pc.html > > Steve > > > __________ NOD32 Informacje 3068 (20080501) __________ > > Wiadomosc zostala sprawdzona przez System Antywirusowy NOD32 > http://www.nod32.com lub http://www.nod32.pl > > > >------------------------------------------------------------------------------ > > > _______________________________________________ > Aroid-L mailing list > Aroid-L at www.gizmoworks.com > http://www.gizmoworks.com/mailman/listinfo/aroid-l > > > __________ NOD32 Informacje 3068 (20080501) __________ > > Wiadomosc zostala sprawdzona przez System Antywirusowy NOD32 > http://www.nod32.com lub http://www.nod32.pl > > >

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