As biometrics-based identification and identity authentication become increasingly widespread in their deployment, it becomes correspondingly important to consider more carefully issues relating to reliability, usability and inclusion. One factor which is particularly important in this context is that of the relationship between the nature of the measurements extracted from a particular biometric modality and the age of the sample donor, and the effect which age has on physiological and behavioural characteristics invoked in a biometric transaction.

Alaska Trees and Shrubs has been the definitive work on the woody plants of Alaska for more than three decades. This new, completely revised second edition provides updated information on habitat, as well as detailed descriptions of every tree or shrub species in the state. New distribution maps reflect the latest survey data, while the keys, glossary, and appendix on non-native plants make this the most useful guide to Alaska trees and shrubs ever published.

This is by far the best and most comprehensive manual and illustrated guide to native and naturalized vascular plants—ferns, conifers, and flowering plants—growing in aquatic and wetland habitats in northeastern North America, from Newfoundland west to Minnesota and south to Virginia and Missouri. Published in two volumes, this long-awaited work completely revises and greatly expands Norman Fassett’s 1940 classic A Manual of Aquatic Plants, yet retains the features that made Fassett’s book so useful.

 Features include:
 *  coverage of 1139 plant species, 1186 taxa, 295 genera, 109 families
 *  more than 600 pages of illustrations, and illustrations for more than 90% of the taxa
 *  keys for each species include references to corresponding illustrations
 *  habitat information, geographical ranges, and synonomy
 *  a chapter on nuisance aquatic weeds
 *  glossaries of botanical and habitat terms
 *  a full index for each volume

Wetland ecologists, botanists, resource managers, public naturalists, and environmentalists concerned with the preservation of wetland areas, which are increasingly threatened, will welcome this clear, workable, and comprehensive guide.

This is by far the best and most comprehensive manual and illustrated guide to native and naturalized vascular plants—ferns, conifers, and flowering plants—growing in aquatic and wetland habitats in northeastern North America, from Newfoundland west to Minnesota and south to Virginia and Missouri. Published in two volumes, this long-awaited work completely revises and greatly expands Norman Fassett’s 1940 classic A Manual of Aquatic Plants, yet retains the features that made Fassett’s book so useful.

 Features include:
 *  coverage of 1139 plant species, 1186 taxa, 295 genera, 109 families
 *  more than 600 pages of illustrations, and illustrations for more than 90% of the taxa
 *  keys for each species include references to corresponding illustrations
 *  habitat information, geographical ranges, and synonomy
 *  a chapter on nuisance aquatic weeds
 *  glossaries of botanical and habitat terms
 *  a full index for each volume

Wetland ecologists, botanists, resource managers, public naturalists, and environmentalists concerned with the preservation of wetland areas, which are increasingly threatened, will welcome this clear, workable, and comprehensive guide.

Approximately 75 percent of all fungi that have been described to date belong to the phylum Ascomycota. They are usually referred to as Ascomycetes and are commonly found and collected by mushroom enthusiasts. Ascomycetes exhibit a remarkable range of biodiversity, are beautiful and visually complex, and some, including morels and truffles, are highly prized for their edibility. Many play significant roles in plant ecology because of the mycorrhizal associations that they form. Thus it is remarkable that no book dedicated to describing and illustrating the North American Ascomycetes has been published in over sixty years.

Filling the gap between technical publications and the limited representation of Ascomycetes in general mushroom field guides, Ascomycete Fungi of North America is a scientifically accurate work dedicated to this significant group of fungi. Because it is impossible to describe and illustrate the tens of thousands of species that occur in North America, the authors focus on species found in the continental United States and Canada that are large enough to be readily noticeable to mycologists, naturalists, photographers, and mushroom hunters. They provide 843 color photographs and more than 600 described species, many of which are illustrated in color for the first time. While emphasizing macroscopic field identification characteristics for a general audience, the authors also include microscopic and other advanced information useful to students and professional mycologists. In addition, a color key to the species described in this book offers a visual guide to assist in the identification process.

Lake Michigan, winding creeks, sprawling swamps, and one of the world’s great rivers--Illinois’s variety of aquatic habitats makes the Prairie State home to a diverse array of fishes. The first book of its kind in over forty years, An Atlas of Illinois Fishes is a combination of nature guide and natural history. It provides readers with an authoritative resource based on the extensive biological data collected by scientists since the mid-1850s. Each of the entries on Illinois’s 217 current and extirpated fish species offers one or more color photographs; maps depicting distributions at three time periods; descriptions of identifying features; notes on habitat preference; and comments on distribution. In addition, the authors provide a pictorial key for identifying Illinois fishes.

Scientifically up-to-date and illustrated with over 240 color photos, An Atlas of Illinois Fishes is a benchmark in the study of Illinois’s ever-changing fish communities and the habitats that support them.