The IUCN Red List of Threatened Species is the world’s most comprehensive inventory of the global conservation status of plant and animal species. It uses a set of criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world.
The inside line of a grass bed or a creek channel.
A weather condition accompanied by high, clear skies, and a sudden drop in temperature.
Abrupt edge of a weedbed caused by a change in depth, bottom type, or other factor.
Distinct variation in otherwise constant stretches of cover, structure, or bottom type. Basically anything that “breaks up” the underwater terrain.
