290:
1628:
308:
25:
591:(subspecies, plant varieties, and other designations below the level of the species) may be assigned global T-ranks. A T-rank is appended to the G-rank for the including species. N-ranks and S-ranks presented with T-ranks apply to the particular infraspecific taxon, not its including species. Most taxa given such ranks have trinomial (three-word) rather than binomial (two-word)
674:– Range of ranks due to uncertainty, where x would be a repetition of the initial letter for Global, National, or Subnational rankings, e.g. G2G3 would mean a global rank ranging from G2 to G3. Limited to two ranks of difference, beyond which the status would be U for Unrankable (i.e. N1N4 would instead be listed as NU).
433:
specified subnational unit within a nation. Letter-based notations are used for various special cases to which the numerical scale does not apply, as explained below. Ranks at various levels may be concatenated to combine geographical levels, and also to address infraspecific taxa (subspecies and plant varieties).
701:
Any NatureServe rank may be used alone, or G-, T-, N-, and S- ranks may be combined in that sequence, such as a G5N3S1 rank for a particular species (or ecological community) within a particular subnational unit of a particular nation. An entity has only a single global rank (G-rank alone, or G-rank
432:
Most NatureServe ranks show the conservation status of a plant or animal species or a natural ecological community using a one-to-five numerical scale (from most vulnerable to most secure), applied either globally (world-wide or range-wide) or to the entity's status within a particular nation or a
546:(not located despite extensive and intensive searches, with rediscovery not reasonably expected). Extinction is here considered a global (range-wide) phenomenon, while extirpation applies to loss within a particular national or subnational area, with the entity still extant elsewhere.
612:
Note, however, that regionally native species or other taxa that have recently arrived in the area of interest by natural means (such as wind, floods, or birds), without direct or indirect human intervention, are ranked by the same methodology and notation as for other native taxa.
608:- Used at the national or subnational levels, E indicates taxa not native in the specified area, even historically, but currently or historically present there due to direct or indirect human intervention; such taxa are often termed exotic, escaped, non-native, adventive, or waif.
385:
levels. These designations are also referred to as NatureServe ranks, NatureServe statuses, or
Natural Heritage ranks. While the Nature Conservancy is no longer substantially involved in the maintenance of these ranks, the name TNC ranks is still sometimes encountered for them.
424:. The NatureServe Explorer website presents a centralized set of global, national, and subnational NatureServe ranks developed by NatureServe or provided by cooperating U.S. Natural Heritage Programs and Canadian and other international Conservation Data Centers.
566:
Thus, for example, a G3 species is "globally vulnerable", and an N2 species is "nationally imperiled" for the particular country the rank is assigned. Species with G, N, or S rankings of 4 or 5 are generally not the basis for major conservation actions.
562:- Recorded within a nation or subnation, but local status not available or not yet determined. When combined with a global rank of G1 to G3, local status is 'Indeterminate,' but the entity is nevertheless presumed vulnerable, if still extant.
629:, typically encountered as isolated individuals, are rarely themselves targets of conservation attention, are generally given a placeholder global rank of HYB, and not ranked at the national or subnational levels.
692:– Not applicable, meaning not suitable for conservation activities, typically used for hybrids with no conservation value, or non-native ecosystems (e.g. agricultural fields).
1682:
1677:
1672:
943:
1662:
155:
58:
661:- When appended to X or H, the letter 'C' indicates species or other taxa extant in captivity or cultivation, although otherwise extirpated or extinct.
649:
doubling. Some of these hybrid-derived species are quite rare (ranked G1), but others are so widespread, abundant, and secure as to deserve a G5 rank.
803:
1051:
1667:
1046:
389:
NatureServe ranks indicate the imperilment of species or ecological communities as natural occurrences, ignoring individuals or populations in
261:
202:
637:
known or suspected to be of hybrid origin are ranked using the same methodology and notation as for other species. For example, many fertile
515:— (uncommon but not rare, but with some cause for long-term concern; typically having 101 or more occurrences, or 10,001 or more individuals).
332:
238:
460:- Ranks designated at a subnational level (S-rank) for a particular next-lower geographical unit within a nation, such as a state in the US.
1448:
212:
1280:
1498:
702:
and T-rank combination), but may have different N-ranks or S-ranks for different nations or subnations within its geographical range.
1616:
175:
165:
130:
552:- Possibly extinct or extirpated (of historical occurrence but not known recently extant, with some reasonable hope of rediscovery).
1550:
289:
1478:
1657:
796:
743:
35:
1533:
1270:
575:
Several less frequent special cases are addressed through other notation in the NatureServe ranking system, including:
1545:
923:
325:
76:
1513:
1039:
789:
279:
161:
120:
1380:
1319:
873:
44:
1297:
979:
863:
823:
208:
1631:
1370:
1205:
1029:
1009:
1593:
1336:
1131:
1126:
1004:
318:
1611:
1518:
1503:
1302:
1187:
1116:
1019:
913:
50:
307:
1453:
1061:
853:
1493:
1473:
1458:
1428:
1324:
1621:
1538:
1508:
1488:
1096:
1014:
999:
989:
964:
959:
401:
established through human intervention beyond the species' natural range, as for example with many
54:
1463:
1365:
1312:
1071:
994:
716:
382:
198:
40:
1528:
1523:
1443:
1438:
1433:
1423:
1405:
1390:
1244:
903:
469:
The most commonly encountered NatureServe conservation statuses at the G-, N-, or S-level are:
408:
NatureServe ranks have been designated primarily for species and ecological communities in the
358:
1483:
1468:
1289:
1210:
1182:
1177:
1136:
1106:
1101:
1066:
984:
928:
868:
858:
441:
NatureServe conservation statuses may be applied at any or all of three geographical levels:
218:
151:
1652:
1578:
1568:
1375:
1172:
1121:
1111:
1076:
974:
969:
933:
898:
893:
888:
833:
812:
8:
1385:
1360:
1353:
1275:
1197:
918:
908:
878:
711:
378:
126:
92:
843:
295:
97:
1341:
1215:
1146:
938:
398:
390:
171:
140:
1598:
1307:
1265:
1151:
1034:
394:
1329:
1024:
848:
626:
543:
402:
751:
525:— (common, widespread, abundant, and lacking major threats or long-term concerns).
1056:
592:
505:— (rare; typically having 21 to 100 occurrences, or 3,001 to 10,000 individuals).
1086:
234:
1646:
1583:
1573:
1346:
1237:
1225:
1220:
642:
417:
409:
354:
269:
244:
454:- Ranks designated at a national level (N-rank) for a particular nation, and
1260:
485:— (typically having 5 or fewer occurrences, or 1,000 or fewer individuals).
781:
361:(TNC) as a means for ranking or categorizing the relative imperilment of
350:
495:— (typically having 6 to 20 occurrences, or 1,001 to 3,000 individuals).
646:
638:
539:
353:
in cooperation with the
Natural Heritage Network, was developed in the
186:
116:
105:
1400:
1232:
421:
776:
416:, but the methodology is global, and has been used in some areas of
24:
1156:
883:
633:
However, reproducing or other self-maintaining, population-forming
374:
634:
362:
448:- Ranks designated at the global (or range-wide) level (G-rank),
1141:
652:
413:
370:
366:
588:
436:
680:– Unrankable, due to conflicting or absent information.
645:formed by interspecific hybridization followed by
1683:Fauna of the United States by conservation status
1678:Flora of the United States by conservation status
1673:Biota of the United States by conservation status
578:
1644:
1052:Other effective area-based conservation measures
39:, potentially preventing the article from being
1047:Integrated Conservation and Development Project
16:Conservation status assigned by the NatureServe
1663:Biota of North America by conservation status
797:
570:
464:
326:
653:Taxa extant only in captivity or cultivation
811:
599:
804:
790:
333:
319:
59:reliable, independent, third-party sources
77:Learn how and when to remove this message
696:
616:
437:Global, national, and subnational levels
53:by replacing them with more appropriate
36:too closely associated with the subject
1668:Biota of Mexico by conservation status
1645:
785:
738:
736:
734:
732:
686:– Not ranked, i.e. not yet assessed.
349:system, maintained and presented by
18:
13:
729:
14:
1694:
924:Conservation biology of parasites
777:https://explorer.natureserve.org/
770:
750:. NatureServe Inc. Archived from
744:"NatureServe Conservation Status"
1627:
1626:
1040:Tropical rainforest conservation
944:Vulnerability and susceptibility
665:
306:
288:
280:Lists of organisms by population
34:may rely excessively on sources
23:
1589:NatureServe conservation status
874:Conservation-induced extinction
427:
347:NatureServe conservation status
980:Conservation management system
864:Conservation-dependent species
824:Index of conservation articles
587:- When desired, infraspecific
579:Subspecies and plant varieties
379:natural ecological communities
1:
1206:Assisted natural regeneration
1010:Ecoregion conservation status
722:
381:, on the global, national or
264:Conservation of Nature (IUCN)
1658:Biota by conservation status
1594:Special Area of Conservation
1132:Landscape-scale conservation
1127:High conservation value area
1005:Community-based conservation
7:
1612:List of conservation issues
1020:Evidence-based conservation
914:Mutualisms and conservation
705:
209:Conservation Dependent (CD)
10:
1699:
1062:Roadless area conservation
854:Compassionate conservation
571:Ranks for additional cases
529:
472:
465:Commonly encountered ranks
152:Critically Endangered (CR)
1607:
1561:
1416:
1253:
1196:
1165:
1085:
952:
832:
819:
1449:Central African Republic
1097:Conservation designation
1015:Environmental protection
1000:Conspicuous conservation
990:Conservation photography
965:Conservation development
960:Conservation agriculture
600:Non-native (exotic) taxa
127:Extinct in the Wild (EW)
1188:Human–wildlife conflict
1072:Site-based conservation
995:Conservation psychology
813:Conservation of species
717:Listing priority number
262:International Union for
1245:Species reintroduction
904:Latent extinction risk
399:non-native occurrences
359:The Nature Conservancy
98:IUCN Red List category
1617:List of organisations
1271:Hawaiian honeycreeper
1211:Ecosystem restoration
1183:Habitat fragmentation
1178:Fortress conservation
1137:Marine protected area
1107:Conservation easement
1102:Conservation district
1067:Roadside conservation
985:Conservation movement
929:Species translocation
869:Conservation genetics
859:Conservation behavior
697:Combinations of ranks
627:interspecific hybrids
617:Interspecific hybrids
1579:Planetary boundaries
1569:Conservation officer
1173:Conservation refugee
1122:Habitat conservation
1112:Conservation reserve
1077:Wetland conservation
975:Conservation grazing
970:Conservation finance
934:Conservation welfare
899:In-situ conservation
894:Extinction threshold
889:Ex-situ conservation
748:NatureServe Explorer
483:Critically imperiled
397:, and also ignoring
199:Near Threatened (NT)
919:Nature conservation
909:Marine conservation
879:Conservation status
712:Conservation status
235:Data Deficient (DD)
93:Conservation status
1216:Island restoration
1147:Open space reserve
939:Threatened species
754:on 5 February 2009
302:NatureServe status
275:NatureServe status
245:Not Evaluated (NE)
219:Least Concern (LC)
1640:
1639:
1599:Soil conservation
1152:Wildlife corridor
1035:Forest protection
1030:Forest management
513:Apparently secure
343:
342:
87:
86:
79:
1690:
1630:
1629:
1514:Papua New Guinea
1406:Cryopreservation
1371:Gray nurse shark
1025:Flagship species
849:Captive breeding
806:
799:
792:
783:
782:
764:
763:
761:
759:
740:
593:scientific names
403:invasive species
357:in the 1980s by
335:
328:
321:
310:
296:Red List classes
292:
227:Other categories
189:
143:
108:
89:
88:
82:
75:
71:
68:
62:
27:
19:
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1643:
1642:
1641:
1636:
1603:
1557:
1412:
1330:Indian elephant
1249:
1192:
1161:
1157:30 by 30 target
1088:
1081:
1057:Riparian buffer
948:
835:
828:
815:
810:
773:
768:
767:
757:
755:
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708:
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619:
602:
581:
573:
532:
475:
467:
439:
430:
339:
305:
299:
293:
266:
263:
187:
172:Vulnerable (VU)
162:Endangered (EN)
141:
106:
100:
83:
72:
66:
63:
48:
28:
17:
12:
11:
5:
1696:
1686:
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1680:
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1665:
1660:
1655:
1638:
1637:
1635:
1634:
1624:
1622:List of people
1619:
1614:
1608:
1605:
1604:
1602:
1601:
1596:
1591:
1586:
1581:
1576:
1571:
1565:
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1559:
1558:
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1534:United Kingdom
1531:
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1501:
1496:
1491:
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1471:
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1418:
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1395:
1394:
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1388:
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1381:Painted turtle
1378:
1373:
1368:
1358:
1357:
1356:
1351:
1350:
1349:
1339:
1334:
1333:
1332:
1322:
1317:
1316:
1315:
1305:
1300:
1298:American bison
1292:
1287:
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1285:
1284:
1283:
1273:
1263:
1257:
1255:
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1218:
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1185:
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1175:
1169:
1167:
1163:
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1154:
1149:
1144:
1139:
1134:
1129:
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1114:
1109:
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1099:
1093:
1091:
1083:
1082:
1080:
1079:
1074:
1069:
1064:
1059:
1054:
1049:
1044:
1043:
1042:
1037:
1027:
1022:
1017:
1012:
1007:
1002:
997:
992:
987:
982:
977:
972:
967:
962:
956:
954:
950:
949:
947:
946:
941:
936:
931:
926:
921:
916:
911:
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896:
891:
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771:External links
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294:Comparison of
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253:Related topics
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1584:IUCN Red List
1582:
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1577:
1575:
1574:De-extinction
1572:
1570:
1567:
1566:
1564:
1560:
1552:
1549:
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1546:United States
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1236:
1235:
1234:
1231:
1227:
1226:afforestation
1224:
1223:
1222:
1221:Reforestation
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1203:
1201:
1199:
1195:
1189:
1186:
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1018:
1016:
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986:
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666:Variant ranks
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418:Latin America
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1347:Bengal Tiger
1303:Arabian oryx
1294:Land mammal
1281:Golden eagle
1117:Gap analysis
844:Biodiversity
834:Conservation
756:. Retrieved
752:the original
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428:Introduction
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117:Extinct (EX)
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49:Please help
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1653:NatureServe
1519:South Sudan
1504:New Zealand
1198:Restoration
758:18 December
641:species of
538:- Presumed
395:cultivation
383:subnational
373:, or other
351:NatureServe
1647:Categories
1454:Costa Rica
1417:By country
1337:Slow loris
1313:Polar bear
1166:Key issues
953:Approaches
723:References
647:chromosome
544:extirpated
503:Vulnerable
188:Lower Risk
142:Threatened
51:improve it
41:verifiable
1494:Mauritius
1474:Indonesia
1459:Hong Kong
1429:Australia
1401:Seed bank
1391:Sea otter
1261:Arthropod
1233:Rewilding
1087:Protected
639:polyploid
625:- Modern
493:Imperiled
422:Caribbean
391:captivity
375:organisms
67:July 2018
55:citations
1632:Category
1539:Scotland
1509:Pakistan
1489:Malaysia
1325:Elephant
1254:By taxon
884:Endemism
706:See also
420:and the
1562:Related
1551:forests
1499:Namibia
1479:Ireland
1464:Iceland
1376:Manatee
1366:Dolphin
1320:Cheetah
836:biology
635:species
540:extinct
530:Letters
473:Numbers
371:animals
363:species
107:Extinct
45:neutral
1529:Uganda
1524:Sweden
1444:Canada
1439:Brazil
1434:Belize
1424:Angola
1397:Plant
1386:Salmon
1361:Marine
1276:Raptor
1238:marine
1142:Marxan
523:Secure
414:Canada
367:plants
1484:Italy
1469:India
1342:Tiger
1290:Fungi
1089:areas
643:ferns
304:below
298:above
1354:Wolf
1308:Bear
1266:Bird
760:2013
589:taxa
412:and
345:The
300:and
239:list
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672:#x#
623:HYB
558:or
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731:^
690:NA
684:NR
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