Andrew Thanks.
The evolution of fish ( increase in numbers and diversity ) and evolution of diatoms is closely interlinked. The earliest known fossil diatoms date from the early Jurassic (~185 Ma) Kooistra, W. H. C. F.; Medlin, L. K. (1996). "Evolution of the diatoms (Bacillariophyta) : IV. A reconstruction of their age from small subunit rRNA coding regions and the fossil record". Mol. Phylogenet. Evol. 6: 391–407. sedimentary evidence suggests an earlier origin. ^ Schieber, J.; Krinsley, D.; Riciputi, L. (2000). "Diagenetic origin of quartz silt in mudstones and implications for silica cycling". Nature 406 (6799): 981–985. doi:10.1038/35023143. PMID 10984049. Damming of rivers has also interfered with the silica cycle by reducing flow of silt down rivers. http://friendsofsebago.blogspot.in/ How Maine's Sea-Run Fish were Dammed into Oblivion: 1864. Citation: Boardman, Samuel L. 'Aquaeculture': in Ninth Annual Report of the Secretary of the Maine Board of Agriculture. 1864. Augusta, Maine. Stevens & Sayward, Printers to the State. Also pub. in Maine Farmer, March 23, 1865 "Everyone knows, too, that many of the species of fishes which remain permanently in our fresh waters, have very much decreased in numbers, as well as in size and fatness. People say that this is a necessary consequence of the building of dams and mills, and filling the streams with obstructions of various kinds for the industrial pursuits of a civilized community." Please note the year - 1864 / 1865 The Dependence of the Fishes on the Diatoms Albert Mann. Ecology, Vol. 2, No. 2 ( Apr., 1921 ), pp. 79-83 Stable URL: http://www.jstor.org/stable/1928919 “No diatoms, no hake” "There is no better illustration in science of the practical value of ecology than is afforded by the diatoms. The economic importance they are now [1921] seen to have might have been understood fifty years earlier [i.e, 1871] and some use might have been made of their value during that period of time, if the inter-relation of these remarkable plants with other forms of aquatic life had been prominent in the minds of investigators. As it is, they remained for many years little more than the playthings of microscopists, prized and wondered over because of their astonishing beauty, collected at great expense by enthusiastic amateurs, and illustrated in costly books, which may be searched through in vain for any hint of their worth outside of that belonging to their symmetry of form and striking loveliness of design." For the past 90 / 140 years Diatoms have been badly neglected, we are trying to remedy the situation. Another post on Friends of Sebago Bay blog - http://friendsofsebago.blogspot.in/2010/11/fosl-letter-to-ferc-11-26-10.html The restoration of Diatoms and Fish is a very important Geoengineering / Bioengineering / Geobioengineering goal. regards Bhaskar www.nualgi.com/new On Feb 11, 6:43 pm, Andrew Lockley <and...@andrewlockley.com> wrote: > This fascinating article in new > scientisthttp://www.newscientist.com/mobile/article/dn21441-most-fish-in-the-s... > > Discusses this paper > Journal reference: Proceedings of the Royal SocietyB, DOI: > 10.1098/rspb.2012.0075 > > So what have fish got to do with geoengineering? A lot, imo. > > If the sea is so vulnerable to extinctions that it can't sustain fish, and > requires re seeding from rivers, we best work harder to protect it from > anoxia, acidification and other AGW related horrors. > > As the article points out, these treats are coming down the pipe at us > already. > > A -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com. To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
