Disturbance, Survival, and Succession: Understanding Ecological Responses to the 1980 Eruption of Mount St. Helens -- Geological and Ecological Settings of Mount St. Helens Before May 18, 1980 -- Physical Events, Environments, and Geological-Ecological Interactions at Mount St. Helens: March 1980-2004 -- Survival and Establishment of Plant Communities -- Plant Responses in Forests of the Tephra-Fall Zone -- Plant Succession on the Mount St. Helens Debris-Avalanche Deposit -- Geomorphic Change and Vegetation Development on the Muddy River Mudflow Deposit -- Proximity, Microsites, and Biotic Interactions During Early Succession -- Remote Sensing of Vegetation Responses During the First 20 Years Following the 1980 Eruption of Mount St. Helens: A Spatially and Temporally Stratified Analysis -- Survival and Establishment of Animal Communities -- Arthropods as Pioneers in the Regeneration of Life on the Pyroclastic-Flow Deposits of Mount St. Helens -- Posteruption Arthropod Succession on the Mount St. Helens Volcano: The Ground-Dwelling Beetle Fauna (Coleoptera) -- Causes and Consequences of Herbivory on Prairie Lupine (Lupinus lepidus) in Early Primary Succession -- Responses of Fish to the 1980 Eruption of Mount St. Helens -- Amphibian Responses to the 1980 Eruption of Mount St. Helens -- Small-Mammal Survival and Colonization on the Mount St. Helens Volcano: 1980-2002 -- Responses of Ecosystem Processes -- Mycorrhizae and Mount St. Helens:Story of a Symbiosis -- Patterns of Decomposition and Nutrient Cycling Across a Volcanic Disturbance Gradient: A Case Study Using Rodent Carcasses -- Lupine Effects on Soil Development and Function During Early Primary Succession at Mount St. Helens -- Response and Recovery of Lakes -- Lessons Learned -- Ecological Perspectives on Management of the Mount St. Helens Landscape -- Overview of Ecological Responses to the Eruption of Mount St. Helens: 1980-2005. The eruption of Mount St. Helens on May 18, 1980, had a momentous impact on the fungal, plant, animal, and human life from the mountain to the far reaches of the explosion's ash cloud and mudflows. Although this intense natural event caused loss of substantial life and property, it also created a unique opportunity to examine a huge disturbance of natural systems and their subsequent responses. Based on one of the most studied areas of volcanic activity, this book synthesizes the ecological research that has been conducted for twenty-five years since the eruption. Research from geology as well as plant and animal ecology has been integrated in this unprecedented look at the complex interactions of biological and physical systems in the response of the volcanic landscape. Lessons from the volcano inform our larger understanding of ecosystem disturbances, natural processes, and the impact of land-use practices. Included are results of significant and long-term research on vegetation, mycorrhizae, plant and animal interactions, arthropods, amphibians, mammals, fish, lakes, nutrient cycling, geomorphology, and environmental management. This comprehensive account will be of value to those interested in natural history, ecology, disturbance, conservation biology, limnology, geoscience, and land management. Questions about what actually happens when a volcano erupts, what the immediate and long-term dangers are, and how life reasserts itself in the environment are discussed in full detail. Virginia Dale is a Corporate Fellow in the Environmental Sciences Division at Oak Ridge National Laboratory. She is also an adjunct faculty member in the Department of Ecology and Evolutionary Biology at the University of Tennessee. Fred Swanson is a Research Geologist at the USDA Forest Service Pacific NW Research Station in Corvallis, OR. Charles Crisafulli is an Ecologist at the USDA Forest Service Pacific Northwest Research Station in Olympia, WA.