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The mean annual population density of earthworms was found to be 164.6 m-2 during a period of detailed study between October 1971 and September 1972. In a year of less detailed study between November 1972 and October 1973 the population density was 117.5 m-2 (139.8 m-2 when the type of extraction method was allowed for). Mean biomass densities in the two(More)
Two methods of extraction were used in the estimation of snail population densities in woodland litter. The time-consuming-Vágvölgyi technique proved to be 6.25 times more efficient than infra-red heat extraction but it was shown that the results obtained by the latter method could be easily corrected to conform with those of the former. Snail density(More)
We investigated the pattern of crystal co-orientation at different length scales, together with variations in chemical composition and nanomechanical properties in the teeth of the modern sea urchin Paracentrotus lividus with electron backscatter diffraction (EBSD), electron probe microanalysis, energy-dispersive X-ray spectroscopy and nanoindentation(More)
* Acting Professor, University of California at Los Angeles ("UCLA") School of Law. kang@law.ucla.edu; <http://www.law.ucla.edu/faculty/kang>. For helpful conversations and comments, I thank Rick Abel, Keith Aoki, Stephen Bainbridge, Paul Bergman, Stuart Biegel, Gary Blasi, Daniel Bussel, Evan Caminker, Ann Carlson, Margaret Chon, Richard Fallon, Catherine(More)
The mean annual population density of enchytraeids in the litter and upper 6 cm of soil was found to be 14,590 m-2. Mean individual weights approximated 116, 158 and 151 μg wet wt. in the litter, 0–3 cm and 3–6 cm strata respectively. The mean biomass was estimated to be 1.908 g wet wt m-2. Vertical migration was shown to occur, the upward migration in late(More)