In recognition of the need to determine dynamic properties of naturally frozen materials, a research project was conducted to measure the dynamic properties (dynamic moduli and damping ratio) of naturally frozen wedge ice samples obtained from the Fairbanks, Alaska area. Cyclic triaxial and resonant column test systems were employed to...
US forestlands are increasingly subject to disturbances including wildfire, insects and disease, and urban and exurban development. Devising strategies for addressing these "forest threats" depends on anticipating where individual disturbances are most likely and where they might occur in combination. However, many spatial data sets describing forest threats are produced...
Published September 1951. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
As people encroach increasingly on natural areas, one question is how this affects avian biodiversity.
The answer to this is partly scale-dependent. At broad scales, human populations and biodiversity
concentrate in the same areas and are positively associated, but at local scales people and biodiversity are
negatively associated with biodiversity....
As people encroach increasingly on natural areas, one question is how this affects avian biodiversity.
The answer to this is partly scale-dependent. At broad scales, human populations and biodiversity
concentrate in the same areas and are positively associated, but at local scales people and biodiversity are
negatively associated with biodiversity....
Full Text:
., Radeloff, V. C., Lepczyk, C. A., Keuler, N. S.,
Wood, E. M., Stewart, S. I. and Hammer, R. B. (2014
As people encroach increasingly on natural areas, one question is how this affects avian biodiversity. The answer to this is partly scale-dependent. At broad scales, human populations and biodiversity concentrate in the same areas and are positively associated, but at local scales people and biodiversity are negatively associated with biodiversity....
Previously unaddressed aspects of how equatorial currents affect long Rossby wave phase speeds are investigated using solutions of the shallow-water equations linearized about quasi-realistic currents. Modification of the background potential vorticity (PV) gradient by curvature in the narrow equatorial currents is shown to play a role comparable to the Doppler...
Fire-prone landscapes are not well studied as coupled human and natural systems (CHANS) and present many challenges
for understanding and promoting adaptive behaviors and institutions. Here, we explore how heterogeneity, feedbacks, and external
drivers in this type of natural hazard system can lead to complexity and can limit the development...
Published August 1917. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Dams impound the majority of rivers and provide important societal benefits, especially daily water releases that enable on-peak hydroelectricity generation. Such “hydropeaking” is common worldwide, but its downstream impacts remain unclear. We evaluated the response of aquatic insects, a cornerstone of river food webs, to hydropeaking using a life history–hydrodynamic...
Full Text:
in
figure 6 Dam River State
Hydropeaking
index
Mean
EPT % n Years
Data
source
A Hoover