The second answer...
From: [log in to unmask] (Tim Nelson)
To: [log in to unmask]
Date: 97-04-03 12:23:24 EST
I'll try to answer your questions below. I'll insert my answers in ALL
CAPS so you can find them.
On Wed, 2 Apr 1997 [log in to unmask] wrote:
> Dear algae-L
> I am looking for original sources for three commonly held beliefs that I've
> had difficulty verifying. Please send original sources for reference to
> articles which mention any or all of these three myths/facts:
> 1) Algae produces Oxygen and/or sequesters Carbon 1500 times faster than
THAT NUMBER SEEMS A BIT HIGH. IT COULD BE CORRECT FOR SOME SPECIES OF
ALGAE AND SOME TREES. HOWEVER, THERE IS A SIGNIFICANT QUESTION OF WHAT
UNITS YOU ARE USING TO MEASURE PHOTOSYNTHESIS. TREES HAVE LOTS OF
NONPHOTOSYNTHETIC TISSUE. THEY ALSO CONTAIN SUBSTANTIAL NON-LIVING TISSUE
(WOOD). WHEN YOU CALCULATE A PHOTOSYNTHETIC RATE, DO YOU DIVIDE BY THE
MASS OF PHOTOSYNTHETIC TISSUE IN AN ORGANISM, THE MASS OF LIVING TISSUE IN
THE ORGANISM, OR THE TOTAL MASS? TO GET A RATIO LIKE 1500:1, MY GUESS IS
THAT THEY WERE DIVIDING BY TOTAL MASS. SORRY THAT THIS ISN'T THE HARD
ANSWER YOU'RE LOOKING FOR: IT DOES PROVIDE SOME THINGS TO BE CAUTIOUS
> 2) Algae produces 90% of the oxygen on the earth (only 10% from trees)
AGAIN, THIS SEEMS A BIT HIGH, BUT NOT OUT OF THE REALM OF REALITY. THE
MAJORITY OF THE EARTH'S SURFACE IS COVERED BY WATER.
> 3) Fossil records show that blue-green algae is the earliest form of life
NOT LIKELY. FOSSIL RECORDS INDICATE THAT BACTERIA WERE PRESENT EARLY ON,
AND IT WASN'T TOO LONG BEFORE CYANOBACTERIA (AKA, BLUE-GREEN ALGAE)
APPEARED. HOWEVER, THE EARLIEST BACTERIA WERE PROBABLY NOT
> Many thanks in advance for this info!
> Will Kidd
> Knoxville, TN USA
> [log in to unmask]