Intact core tetraether membrane lipids of marine planktonic Crenarchaeota were quantified in water column-suspended particulate matter obtained from four depth intervals (~70, 500, 1,000 and 1,500 m) at seven stations in the northwestern Arabian Sea to investigate the distribution of the organisms at various depths. Maximum concentrations generally occurred at...
Networks are a structure common to many disciplines. Research on
networks has taken different forms in domains such as graph theory, sociology,
vascular networks, small-world networks, geomorphology, ecology, evolution and
engineering. Networks may be modeled as non-spatial networks (unvalued
graphs), which contain only topological information, or as spatial networks (valued...
A healthy river ecosystem is the definitive mark of success in international water quality
planning and management, but until the world's international river basins achieve this kind of success,
there must be other means to assess progress. In this paper, a theoretical background establishes the
complexities inherent in water quality...
Spectral profiles, transformed divergence values, and feature space derived
from Landsat Thematic Mapper (TM) data were used to analyze the ability of four false color
composites to discriminate between different classes of salt-affected soils. To compare the
spatial distribution of salt-affected soil classes, maps were generated for each false color...
A key problem managers face is how to allocate scarce
resources among various activities or projects. Linear
programming, or LP, is a method of allocating resources
in an optimal way. It is one of the most widely used operations
research tools and has been a decision making aid in almost...
Deer grazing outside your window can be a welcome sight, unless
the deer are eating your favorite flowers. Their spring and summer
browsing can kill or severely damage young garden and landscape plants.
Once deer are attracted to your yard, discouraging them is not easy. But, there are ways you...
Oregon has 45 species of birds that nest in holes (cavities) in
rotting or dead trees (snags). But, though they are very valuable for
wildlife, many snags in urban areas are cut down
and removed for aesthetic reasons or because they
are considered a hazard. If you have some dead...