Thanks for the explanation Kouta! 2009/9/20 Kouta Räsänen <[email protected]>: > > Jon, > > The figures I mentioned are for the old-growth portion. From the > description of the study area in the reference # 1 (see above): "An > old stand of very large trees on alluvial flats within this > biogeographic section was selected for study." That study finds the > volume of coarse woody debris (inlcuding standing and fallen dead > logs) to be 797 m3/ha and biomass 262 t/ha. Thus, dead aboveground > material increases total volume and biomass values only 5.6-6.8%. > > Regarding the sign (if it really was 7 times higher), my guess is that > they consider all the western coniferous forests belong to the same > biome, and they simply have not had figures for big forests outside > North America. > > - Kouta > > >> I may have paraphrased the sign incorrectly, but it may have also been >> referring to all of the dead trees on the ground as well. Also I >> believe it specifically meant the contiguous old-growth portion of >> Rockefeller Forest, if that matters. Nevertheless, agreed that even >> 2-3.7 is amazing. >> Cheers, >> Jon >> >> 2009/9/19 Kouta Räsänen <[email protected]>: >> >> >> >> > 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/Supplement... >> > (3)http://article.pubs.nrc-cnrc.gc.ca/RPAS/rpv?hm=HInit&afpf=x00-050.pdf... >> > (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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