400-year-old records are combined with a 2006 study to create a comprehensive analysis of 430 plant varieties across this nine-island system off the coast of New Hampshire and Maine.
An update of past reports on the trends and geographic patterns of threatened or endangered species, taking a county-level comparison to find new areas of species rarity.
International organizations seriously concerned with the preservation of biodiversity find themselves confronted with the enormous task of establishing a hierarchy of sites in need of attention.