Ecosystems are highly heterogeneous systems subjected to important levels of environmental variability; however, it is common in terrestrial biogeochemical models to assume homogeneous properties of the elements of the system or constant environmental conditions. For some processes, heterogeneity in these models is treated very simplistically, but there is not much...
Magnetotelluric (MT) data from two sites 150 and
300 km southeast of San Francisco, California (geomagnetic
dipole latitude: 43 degrees, L approximately 1.9) show that
the usual MT assumption of spatially uniform external magnetic
fields is violated to a significant degree in the period
range 10-30 s. Inter-station transfer functions...
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functions" by Gary D. Egbert, Markus Eisel,
O. SierraBoyd, and H. Frank Morrison
Gary D. Egbert and
Magnetotelluric (MT) data from two sites 150 and
300 km southeast of San Francisco, California (geomagnetic
dipole latitude: 43 degrees, L approximately 1.9) show that
the usual MT assumption of spatially uniform external magnetic
fields is violated to a significant degree in the period
range 10-30 s. Inter-station transfer functions...
Full Text:
. SierraBoyd, and H. Frank Morrison
Engineering Geoscience, University of California, Berkeley, CA
Magnetotelluric (MT) data from two sites 150 and
300 km southeast of San Francisco, California (geomagnetic
dipole latitude: 43 degrees, L approximately 1.9) show that
the usual MT assumption of spatially uniform external magnetic
fields is violated to a significant degree in the period
range 10-30 s. Inter-station transfer functions...
This compilation follows the Fifty-Seven-Year Index to the Sierra Club Bulletin annuals, 1893-1949, compiled by Dorothy H. Bradley and George Shochat and published by the Club in 1952. This index covers the monthly issues from 1950 through 1976 as well as the annuals, which were dated as monthly issues but...
Swamp rice offers tropical populations the most feasible means
of obtaining a dependable and plentiful supply of protein-rich cereals.
An acre of swamp rice land will support many persons and the crop
does not cause erosion. A further production of this type of rice appears
warranted in Sierra Leone and...
I conducted a study to identify potential spawning habitat for anadromous salmonids above a 60-year-old hydropower dam in the headwaters of the North Umpqua River in Oregon. Like many other historical salmonid-bearing rivers, little documentation exists for anadromous fish presence above potential natural obstacles upstream of Soda Springs Dam. My...
Artificial reefs create less productive fish communities than their natural counterparts mostly due to differences in habitat complexity and food potential. Are there other factors contributing to this decrease in productivity, such as the material of the habitat? I tested the response of the tidepool sculpin, Oligocottus maculatus, to man-made...
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SCULPIN AND MICROHABITAT CHOICE
By Sierra Payne
INTRODUCTION
BACKGROUND
• Fisheries declining