Jon,

I agree, Rockefeller Forest is a truly amazing place. However, the
sign you saw:

> I read a sign in the park that said Rockefeller Forest(the contiguous
> old-growth portion of the park) contains seven times the biomass per acre,
> living and dead, of any other biome on earth.

seems to be overstated. Some figures:

- a plot in Rockefeller Forest: total tree biomass 3857-4642 metric
tons per hectare, Sequoia stem biomass 3442-4143 t/ha (1)
- a plot in Goat Marsh RNA, Washington (mostly Noble Fir): stem
biomass 1687 t/ha (2)

In terms of wood volume:

- Rockefeller Forest: Sequoia stem volume 9059 - 10903 cubic meters
per hectare (1) or 8071 m3/ha (3)
- a plot in Giant Forest (mostly Giant Sequoia): stem volume 3331 m3/
ha (3)
- the plot in Goat Marsh RNA: stem volume 3120 m3/ha (3)
- Wallaby Creek stand in Kinglake National Park, Victoria, Australia
(mostly Eucalyptus regnans): total volume 3270 m3/ha, main trunk
volume 2973 m3/ha (4)

The Wallaby Creek stand is mentioned to have highest measured total
wood volume outside western North America (4). Unfortunately it burned
earlier this year (5).

Thus, biomass per acre in Rockefeller forest seems to be 2-3 times
(not 7 times) higher than any other biome. Or if they consider all the
western coniferous forests belong to the same biome, then 2.7-3.7
times higher than any other biome. Of course, 2-3.7 time higher is
incredible too.

Hopefully BVP is reading this thread and provide corrections and
updates.

Sources:
(1) http://www.springerlink.com/content/r4718838620l2713/fulltext.pdf
(2) 
http://www.fs.fed.us/pnw/publications/pnw_1972_franklin001/Supplements/FRNA_Supp.NO.10_GoatMarsh_GH_1_19.pdf
(3) 
http://article.pubs.nrc-cnrc.gc.ca/RPAS/rpv?hm=HInit&afpf=x00-050.pdf&journal=cjfr&volume=30
(4) Van Pelt, Sillett & Nadkarni (2004): Quantifying and Visualizing
Canopy Structure in Tall Forests: Methods and a Case Study. In Lowman
& Rinker (eds.): Forest Canopies, second edition. Elsevier.
(5) http://www.parkweb.vic.gov.au/1park_display.cfm?park=121

- Kouta
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