 | Steve Anderson, Mitchel White, Duane Atwood - 1991 - 58 páginas
...identifiable threat. GLOBAL RANK (As determined by The Nature Conservancy) Gl Critically imperiled globally because of extreme rarity (5 or fewer occurrences,...of its biology making it especially vulnerable to extinction. (Critically endangered throughout range). G2 Imperiled globally because of rarity (6 to... | |
 | Walter Fertig - 1995 - 296 páginas
...HER1TAGE RANKS GLOBAL RANK (G): based on range-wide status of a species. Gl Critically imperiled globally because of extreme rarity (5 or fewer occurrences,...of its biology making it especially vulnerable to extinction. (Critically endangered throughout its range). G2 Imperiled globally because of rarity (6... | |
 | 1995 - 248 páginas
...Ranks appearing in italics are considered tentative at this time. G1 = Critically imperiled globally because of extreme rarity (5 or fewer occurrences or very few remaining individuals or acres) or because of some factor(s) making it especially vulnerable to extinction. G2 = Imperiled globally... | |
 | William B Honachefsky - 1999 - 290 páginas
...Conservancy (1982: Chapter 4, 4.1-1 through 4.4.1.3-3). GLOBAL ELEMENT RANKS G1 Critically imperiled globally because of extreme rarity (5 or fewer occurrences or very few remaining individuals or acres) or because of some factor(s) making it especially vulnerable to extinction. G2 Imperiled globally... | |
 | John Shepard, Crispin Guppy - 2001 - 430 páginas
...range, rather than a national or global rank. The following ranks are used: 1 critically imperilled because of extreme rarity (5 or fewer occurrences or very few remaining individuals) or because of somefactor(s) making it especially vulnerable to extirpation or extinction 2 imperilled because of... | |
| |
Critically imperiled globally because of extreme rarity (5 or fewer occurrences or very few remaining individuals or acres) or because of some factor(s) making it especially vulnerable to extinction. 