Perspectives on Cumulative Risks and Impacts

Cumulative human impacts on marine predators.

Stressors associated with human activities interact in complex ways to affect marine ecosystems, yet we lack spatially explicit assessments of cumulative impacts on ecologically and economically key components such as marine predators. Here we develop a metric of cumulative utilization and impact (CUI) on marine predators by combining electronic tracking data of eight protected predator species...

Understanding and Evaluating Cumulative Watershed Impacts

Considerable effort is devoted to evaluating cumulative watershed impacts during planning for forestry activities on federally managed lands. With the recently increased emphasis on reducing forest fuels, cumulative impact analyses must now evaluate a new suite of activities over a broader scale than had generally been considered in the past. It is useful to review the concept of cumulative imp...

Perspectives on communicating risks of chemicals.

The Agrochemicals Division symposium "Perfecting Communication of Chemical Risk", held at the 244th National Meeting and Exposition of the American Chemical Society in Philadelphia, PA, August 19-23, 2012, is summarized. The symposium, organized by James Seiber, Kevin Armbrust, John Johnston, Ivan Kennedy, Thomas Potter, and Keith Solomon, included discussion of better techniques for communicat...

Cumulative impacts of mountaintop mining on an Appalachian watershed.

Mountaintop mining is the dominant form of coal mining and the largest driver of land cover change in the central Appalachians. The waste rock from these surface mines is disposed of in the adjacent river valleys, leading to a burial of headwater streams and dramatic increases in salinity and trace metal concentrations immediately downstream. In this synoptic study we document the cumulative im...

Cumulative impacts of multiple grass carp releases