Providing a quantitative assessment of threatened plant populations, that holds for varying management scenarios, has become an essential part of conservation planning. Here, renowned plant ecologists provide information on: major threats to plants, when and where to conduct a plant viability assessment (PVA), what type of PVA to conduct, what alternative options to PVA are available, what information is required for which kind of viability assessment, what attributes of the population in question should be considered, and what the limits of the PVA would be. As such, this volume can be used as a training tool for the environmental manager or a teaching aid for reviewing the current state of knowledge on plant population viability.

I. Threats to Plant Population Viability.- 1 Why Plant Population Viability Assessment?.- 2 Threats to Rare Plant Persistence.- 3 Factors Affecting Persistence in Formerly Common and Historically Rare Plants.- 4 The Relationship Between Plant-Pathogen and Plant-Herbivore Interactions and Plant Population Persistence in Fragmented Landscape.- 5 The Origin and Extinction of Species Through Hybridization.- II. Modeling Approaches for Population Viability Analysis.- 6 Approaches to Modeling Population Viability In Plants: An Overview.- 7 The Problems and Potential of Count-Based Population Viability Analyses.- 8 Habitat Models for Population Viability Analysis.- III. Addressing Plant Life Histories in Population Viability Analysis.- 9 Assessing Population Viability in Long-Lived Plants.- 10 Considering Interactions: Incorporating Biotic Interactions into Viability Assessment.- 11 Modeling the Effects of Disturbance, Spatial Variation, and Environmental Heterogeneity on Population Viability of Plants.- 12 Projecting the Success of Plant Population Restoration with Viability Analysis.- IV. Conclusions.- 13 Plant Population Viability: Where to from Here?.