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Urban natural resources management

Science Spotlights

The global composite index of the wildfire-water risk shows spatial distribution of risk from wildfire impacts on water resources. About half of the area globally (51%) is at moderate risk (values between 20 and 40).
Freshwater resources are vital to humans and our natural environment. Water systems around the world are at risk resulting from population growth, urban development, ecosystem degradation, climate change, and over the past several years, from large catastrophic wildfires. Scientists developed the first global evaluation of wildfire risks to water security bringing us a step closer to a global database that maps key wildfire-water risk indicators...
Bacterial exudates covering second instar kermes scales feeding at the junction of new and one-year-old growth.
Disease complexes, the result of insects and plant pathogens interacting to compromise their plant hosts, are becoming increasingly common worldwide. These disease complexes represent an imminent threat to plant biodiversity, because the combined activity of insects and pathogens can cause more damage with a potential for increased spread than diseases caused by a single organism. To better understand and better manage emerging disease complexes...
New book provides visual guide to disease identification for 84 hardwood and 32 conifer tree diseases in the Great Plains. This book includes color illustrations, a glossary of technical terms, and indexes of hosts and pathogens. It covers diseases of foliage, roots, stems, and branches soil-borne and wilt diseases, and the safe handling and use of pesticides.
Cover of Exotic Brome-Grasses in Arid and Semiarid Ecosystems of the Western US – Causes, Consequences, and Management Implications
Invasive annual brome grasses are resulting in altered fire regimes and conversion of native arid and semi-arid ecosystems in the western United States to annual grass dominance. The problem is particularly acute in sagebrush shrublands where cheatgrass (Bromus tectorum) has resulted in annual grass fire cycles that are placing numerous native species such as greater sage-grouse at risk and threating ecosystem services such as livestock forage,...