Mom and Dad are both geologists, so I was raised knowing way too much about this stuff.
I found some more info, and wanted to post it.
The location of the study in my previous post was at - Sabana (18”18’N, 65’5O’W) in the northeastern Luquillo Mountains of Puerto Rico.
There's another paper by the same people who list the location of this test in Puerto Rico as
The study was conducted at El Verde (18°19’N, 65°49’W) in the Luquillo LongTerm Ecological Research (LTER) site, within the subtropical wet forest life zone.
The pH there ranges between 4.7 to 5.9.
http://academic.uprm.edu/publications/c ... 93-100.pdf
Another study, located again in Puerto Rico
The RGA watershed is located in the north-central part of Puerto Rico
Soil pH ranged between 4.5 to 5.3
http://etmd.nal.usda.gov/bitstream/1011 ... 855930.pdf
This one is for the Caribbean side of Cost Rica:
This study was conducted at EARTH University at the conﬂuence of Parismina and Destierro rivers, in the Caribbean lowlands of Limon Province, Costa Rica
pH range of 3.7 to 4.8
http://www.bio-nica.info/biblioteca/Jim ... taRica.pdf
And finally from the Caribbean cost of Columbia:
The region known as Cienaga Grande de Santa Marta is part of the exterior delta of the Magdalena River and is the largest Estuarine lagoonal complex in Colombia.
pH range of 5.8 to 6.85
http://www.uprm.edu/biology/profs/chine ... _e1998.pdf
The low pH of some of these places really shocked me. Sphagnum peat moss has a pH of around 4.5, so that would be very close to some of these soils.
However, I've been looking into Emperor Scorpion care since I saw one in person and thought it would be coolest pet ever. (Like a giant jet-black shell-less hermit crab!
) Imagine my surprise when I learned that this tropical exo-skeletoned arthropod that molts is recommended to be kept on sphagnum peat moss. My initial reaction from having hermits was complete terror, thinking about all the warnings I had heard about pitted exos and bad molts. Yet expert caretakers have been keeping them this way for decades with no exo problems, and the scorpions live out full life-spans of around 8 years. Since their native soil is acidic rainforest, they're already adapted to the low pH. Also, the acidic soil is a bonus in captivity as it prevents the growth of harmful microorganisms.