منابع مشابه
Red list species update fears
Next year is International Year of Biodiversity but the latest report last month from the International Union for the Conservation of Nature (IUCN) marks a grim introduction to the year with growing numbers of species under threat. The Red List of Endangered Species is the world's most comprehensive information source on the global conservation status of plant and animal species with much infor...
متن کاملList Update Posets
This note discusses partially ordered sets (posets) as a structural device for proving or disproving 3/2 as the optimal competitive factor of a randomized on-line algorithm for the list update problem against an oblivious adversary. It represents incomplete work meant for communication to others interested in this problem. This work started in the fall of 1994 when the authors were at ICSI Berk...
متن کاملList Update Problem
We present an optimal on-line algorithm for the List Update Problem when the request sequence has some particular structure.
متن کاملred - an R package to facilitate species red list assessments according to the IUCN criteria
The International Union for the Conservation of Nature Red List is the most useful database of species that are at risk of extinction worldwide, as it relies on a number of objective criteria and is now widely adopted. The R package red - IUCN Redlisting Tools - performs a number of spatial analyses based on either observed occurrences or estimated ranges. Functions include calculating Extent o...
متن کاملSpecies Conservation Profiles compliant with the IUCN Red List of Threatened Species
The International Union for Conservation of Nature (IUCN; www.iucn.org) is the world ́s largest environmental network, with 1,300 member organizations and relying on the input of about 16,000 experts. It provides knowledge and tools that enable and promote the sustainable development at a global level. Among its many outputs, the Red List of Threatened Species (www.iucnredlist.org) is the most w...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2009
ISSN: 0960-9822
DOI: 10.1016/j.cub.2009.11.007