John Wesley Powell Center for Analysis and Synthesis

All Working Groups

Filter Total Items: 65
Date published: June 6, 2012
Status: Active

Distribution of Fibrous Erionite in the United States and Implications For Human Health

Fibrous erionite, a zeolite mineral, has been designated as a human carcinogen by the World Health Organization and is believed to be the cause of extraordinarily high rates of malignant mesothelioma and other asbestos - related diseases in several villages in Central Turkey. A recent study by the University of Hawaii in collaboration with the U. S. Environmental Protection Agency in Dunn...

Date published: June 1, 2012
Status: Active

System analysis of land use and climate effects on ecosystem services affecting C and N exchanges with the atmosphere and water cycles

Current land use practices have affected ecosystem structure and processes in ways that have degraded delivery of key ecosystem services controlling exchanges of carbon and nitrogen with the atmosphere and surface and groundwater systems. These impacts are observed in the emissions of greenhouse gases (GHG) and N pollution in our nation’s water systems and coastal areas. Improvements in...

Date published: April 2, 2012
Status: Active

Global Croplands and Their Water Use for Food Security in the Twenty-first Century

Global climate change is putting unprecedented pressure on global croplands and their water use, vital for ensuring future food security for the world's rapidly expanding human population. The end of the green green revolution (productivity per unit of land) era has meant declining global per capita agricultural production requiring immediate policy responses to safeguard food security amidst...

Date published: February 29, 2012
Status: Active

Integrating ecological forecasting methods to improve applications for natural resource management: An invasive species example

Projecting the effects of climate change on plant and animal species distributions and abundance is critical to successful long‐term conservation and restoration efforts. There have been significant recent advances made in the areas of: (1) climate forecasts; (2) habitat niche modeling; (3) mechanistic modeling; and (4) observation techniques and networks. However, projections of biological...

Date published: February 29, 2012
Status: Active

Circumpolar assessment of ecological mismatch between avian herbivores and plant phenology

The timing of breeding is constrained in Arctic ecosystems and small temporal differences in when individuals breed can have large effects on fitness. Arctic ecosystems are generally warming more rapidly than other ecosystems which, for migratory species, can cause an imbalance, or mismatch, between when they have evolved to breed versus when it is optimal to breed environmentally. Geese are...