The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
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,*† KENDRA HOEKZEMA,† SARAH L. MESNICK,§
DANIEL ENGELHAUPT,¶ IAIN KERR,** ROGERPAYNE** and C. SCOTT BAKER
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
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Alexander1,2,3*, Debbie Steel1,2, Kendra Hoekzema2, Sarah Mesnick4, Daniel Engelhaupt5, Iain Kerr6, Roger Payne6
DYNAMO and TOGA-COARE observations and reanalysis-based surface flux products are
used to test theories of atmosphere-ocean interaction that explain the Madden-Julian
Oscillation (MJO). Negative intraseasonal outgoing longwave radiation, indicating deep
convective clouds, is in phase with increased surface wind stress, decreased solar heating,
and increased surface turbulent heat flux—mostly evaporation—from...
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Vessel (R/V) Roger Revelle in DYNAMO, in accordance with
MJO moisture recharge theory. Local surface
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first of
dozens of former students to answer our plea in the
newspaper for help.
Roger Houglum
Carl
This study describes the surface configuration of
Goodhue County and attempts to determine the origin of that
configuration. The research has a descriptive portion--an
objective examination of land surface configuration and the
composition and distribution of rock material underlying
that surface, and a theoretical portion--a speculative
examination of the factors...
Local property-owning residents maintain high levels of interest
and awareness regarding a neighboring natural resource complex.
Factors, however, such as proximity, personal interests, use patterns
and economic considerations cause local inhabitants to have an
inaccurate perception of the natural resource complex. The nature
of local resident perception can be analyzed...
Volcanic and sedimentary deposits of the Mount Jefferson area (MJA) record a fourmillion-year
history of arc-related volcanism related to the subduction of the Juan de Fuca plate
beneath North America. 171 mapped stratigraphic units over an area of 150 km² reveal four
periods of volcanic activity resulting in diverse composition...
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went above and
beyond the duties of any GCR. Finally, thank you Roger Nielsen for sparking my
The Mount Fubilan Intrusion is part of a geologically young hypabyssal stock in the Star Mountains of Papua New Guinea. This stock was mapped as the Ok Tedi Intrusive Complex and divided into four separate bodies: the Mount Fubilan, Sydney Intrusion, Kalgoorlie, and Ningi Intrusions. Hydrothermal fluids caused alteration of...
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members of my committee (Dr. Ed Taylor, Dr. Roger Nielsen, and Dr
Jon Kimerling) also helped in my