From: Thomas.Croat at mobot.org (Tom Croat) on 2008.05.05 at 13:21:50(17555)|
The term "rain forest" is not a standard or formal
designation. In the Holdridge Life Zone System which I use the term
"rain forest" is used in a variety of designations. A standard range of
wetness would range from Tropical dry forest to Premontane dry forest to
Tropical moist forest, Premontane wet forest, Tropical wet forest,
Tropical rain forest, Premontane rain forest, Lower montane rainforest,
Montane rain forest. The effective degree of wetness is the critical
feature and may be owing to a lot of rain or a cooler temperature and
thus a reduced amount of transevaporation so that a single life zone
could range form sea level to 2000 m depending on the amount of
precipitation. Pluvial lowland forest is the wettest, hottest and is
rather restricted, known only from NW S. America in Colombia where it
may rain 36 feet a year.
From: aroid-l-bounces at gizmoworks.com
[mailto:aroid-l-bounces at gizmoworks.com] On Behalf Of ExoticRainforest
Sent: Thursday, May 01, 2008 9:31 AM
To: Discussion of aroids
Subject: [Aroid-l] Epiphyllums/Off topic
I appreciate that Julius. But I never intended to start a non-aroid
discussion on Aroid l. I have sent a note to Dr. Croat in hopes he will
provide me with a better description of what is scientifically
understood to be a rain forest.
I am NOT a Cactus person, but will add my two cents to this mix.
It appears that this ''debate'' is now centered around the
narrow determination of the difference between a ''rain forest'' and a
''tropical deciduous forest". Being from Trinidad, and having traveled
in Fr. Guyana, I can assure all that tree-growing Cacti I am familiar
with, in most cases do NOT make a distinction, and that they do not
suddenly stop growing or existing in what the experts consider ''true
rain forests''. I have seen climbing epiphitic Cacti high in the wet
canopy, who knows what genera they may be determined to belong to once
they are collected, and Taxonomists get their hands on them. If, as it
is being said, the range of the Cactus genus Epiphyllum is from Southern
Mexico, all of Central America, and all down the Western side of S.
America, I can assure all that in many of these areas, especially in
Panama and W. Colombia, W. Bolivia and W. Brazil there are REAL rain
forests with Cacti growing in them, I don`t know how many species and of
they may be!
The discussion also got turned around, as it was Steve who was
''warning'' that the cacti in question would NOT tollerate a freeze, the
other guy twisted this around to say that Steve had written that they
WOULD take low temps./freezes.
My two cents.
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