A descriptive model of bed material routing was developed for alluvial streams exhibiting sequences of pools and armored riffles. The model assumes that channel geometry, sediment transport competence and the availability of sediments for transport are all non-uniform in the downstream direction. Bedload transport is described as occurring in two...
Marine heatwaves (“MHWs”) are discrete periods of anomalously warm ocean conditions that can lead to shifts in the distribution and abundance of marine organisms. Low-trophic level, pelagic forage species are frequently among those affected by MHWs, often resulting in considerable impacts upon their predators. In the North Atlantic Ocean, Atlantic...
Juniper (Juniperus spp.) woodlands are native but expanding ecological communities that were historically limited by the natural fire return interval of the sagebrush (Artemisia spp.) steppe. These woodlands are often a mix of pinyon pine (Pinus spp.) and juniper that have increased significantly over the last century. This expansion has...
The Southern Ocean plays an important role in the ocean’s uptake of heat and carbon yet the processes controlling this uptake are not well understood. To date, more than 100 biogeochemical profiling floats that measure water column pH, oxygen, nitrate, fluorescence, and backscattering at 10-day intervals have been deployed throughout...
More than 2,000 male newts were collected during the summer
and maintained unfed at 10°C both pre- and post-irradiation.
Exposures ranging up to 30 kR were given with 300 kVp X-rays and
⁶⁰Co gamma rays. Half of the newts were injected (I. P.) with 15 g
DMSO/kg (the maximum sublethal...
The effects of discharged sewage on physico-chemical conditions
and the distribution and abundance of marine benthic animals were
studied in Shilshole Bay, a part of Puget Sound, off Seattle,
Washington. For over 50 years prior to 1965, when this study was
initiated, 87,300 pounds (32,400 pounds BOD) per day of...
