links are under construction.
Metal atoms in Cyclotella meneghiniana (see Marginalia below)
group of unicellular, photosynthetic microorganisms is well-known for
a wonderous, intricate architectural beauty. However, there is more
to a diatom than simply its pretty face. As a major branch
in the tree of life, over the past 250 million years from a mosaic
of genetic sources it has evolved molecular metabolic machinery adaptive
to a variety of circumstances, and it has generated a species diversity
rivalling that of flowering plants. Diatoms have evolved to become important
local and global players in recycling life's critical nutrients, influencing
the composition of the earth's environments and powering the planet's
aquatic ecosystems, as well as elucidating their history. This web site
focusses on their evolution and ecology.
1 May 2015
lost recovery from eutrophication:a
cautionary tale of climate change from a lake in Saxony.
How Diatoms Sequester Carbon.
Chrissy Spencer (Georgia Tech, October 2015). A simple but exceptionally
clear graphic explanation of the iron fertilization hypothesis, diatom
growth and carbon sequestration in Antarctic eddies (video, 5:46 min).
The collateral effects of such fertilization on a large scale merit
Why we should trust scientists [or, 'the collective experience of geeks']. Naomi Oreskes (Harvard University), TED lecture (video, 19 min).
Peter Sinclair's Climate Denial Crock of the Week. The best single stop for what climate change scientists and deniers are currently saying and the public reactions to their positions.
Beauty of Diatoms: from the Marine Food Web to Nanotechnology
by Mark Hildebrand,
Scripps Institution of Oceanography ((video,
50 min) - an introduction to diatoms - their basic cell biology, ecology
and application to nanotechnology from a lecture in 2004
and notes on diatom evolution
in diatoms. An
of the roles of metals in diatom metabolism.
Video (50 sec) of a single cell of the
diatom Cyclotella meneghiniana imaged using x-ray flourescence
tomography showing the 3-dimensional spatial distribution of elementally
different metal atoms (from M. D. de Jonge et al. 2010. Proceedings
of the Academy of Sciences USA 107:1576).
The diatom cell. An introduction to the organelles of diatoms.
diatoms got their name.
- cleft confervas, or carved at the joints.
Washington Square Park, New York City, ca. 1855; fountain not flowing. Image: Luther S. Harris (2003) Around Washington Square: an illustrated history of Greenwich Village, JHU Press. Original photo by Silas A. Holmes, The J. Paul Getty Museum.
calendar and perspectives on the evolution
posters of Vermont lakes and online Primer & Guide
24" x 36" (61 x 91 cm) posters and guide are expected online
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Cite any and all works on this website as derived from www.diatom.org
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