This report is divided into several sections. The first provides information
on the current status of wetlands, the Corps' regulatory role, its statutory
enforcement authority, and its interpretation of that authority. The next
section describes the Portland District's enforcement structure and procedures.
A case study detailing the District's treatment of...
This paper is organized as follows. First, there is a
overview of the U.S. National Marine Sanctuary Program,
including program goals, history and present status, and
sanctuary locations. Trends in multiple use management,
sanctuary size, intergovernmental cooperation, Congressional
intervention in program management, public involvement, and
the 1992 Congressional reauthorization are...
Measurement of plant moisture stress of 1-2 m understory conifers
was made in "reference stands" on the H. J. Andrews Experimental
Forest in 1970-1972. Maximum stress each year (measured between midnight
and dawn) is closely correlated with the position of each community
along one axis of an ordination of the...
In the past two decades, occurrences of summertime upwelling-driven low dissolved oxygen (DO) events, or hypoxia, have increased along the northeast Pacific coast. If hypoxic events are severe enough to cause marine species mortality, the areas affected are often called "dead zones." In 2002 and again in 2006, the events...
Ocean acidification (OA) has emerged as an important focus of research and policy in this decade. Ocean acidification specifically refers to changes in the inorganic carbon system in the ocean resulting from its absorption of human-released CO₂ from the atmosphere. Anthropogenic atmospheric CO₂ levels are rapidly increasing; much of this...
This report is organized into four chapters that provide background on watershed
topics, GIS applications, and methodology related to development of the TBNEP
Watershed Information System. The need for this product is established in Chapter two.
First, the role of ecosystem management and the Tillamook Bay watershed is presented
before...
This report is organized into four chapters that provide background on watershed
topics, GIS applications, and methodology related to development of the TBNEP
Watershed Information System. The need for this product is established in Chapter two.
First, the role of ecosystem management and the Tillamook Bay watershed is presented
before...
Nearshore hypoxia within the Northern California Current (NCC) system is a seasonal phenomenon caused by coastal upwelling and occurs mainly during late-summer and early fall. The effects of low oxygen levels on fish and invertebrate communities, particularly during early-life history stages, however, are poorly known for this area. I investigated...
There are many links between exposure to environmental pollution and risks to human health. While advances in the fields of toxicology, exposure science, and environmental chemistry have shown light on many of these links, many more research challenges remain. One major challenge is how to accurately characterize the toxicity of...