The invasion of true clover into New Zealand is the focus of this analysis of the human role in the introduction and proliferation of nonnative species.
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.