Conservation status of Buddlejas
TABLE 1 Occurrence records of four Buddleja species endemic to the Himalayas, with latitude and longitude, collection years, location descriptors, data sources (Global Biodiversity Information Facility (GBIF), Chinese Virtual Herbarium (CVH) or observation from field surveys), and status (with the number of plants recorded in the respective collection years).
Latitude (N) Longitude (E) Collection years
Buddleja colvilei 27°32′44″ 27°5′32″ 27°30′55″ 27°32′12″ 27°42′38″ 27°21′29″ 27°5′57″ 27°31′8″ 27°33′15″
90°43′16″ 87°58′46″ 89°45′12″ 90°11′57″ 91°9′20″ 88°58′19″ 87°55′55″ 90°32′53″ 88°27′6″
Buddleja delavayi 25°44′21″ 26°38′16″ 27°10′37″ 25°40′10″ 25°40′13″ 25°58′18″
98°41′46″ 99°54′23″ 99°17′13″ 99°56′28″ 99°57′29″ 100°21′43″
Buddleja sessilifolia 27°42′55″ 27°37′56″ 27°35′31″ 27°14′28″ 27°46′48″ 27°10′27″ 27°39′56″ 27°46′47″
98°25′24″ 98°35′51″ 98°33′53″ 98°39′59″ 98°29′52″ 98°46′2″ 98°31′10″ 98°27′57″
Buddleja yunnanensis 23°3′45″ 23°1′56″ 23°2′3″ 23°6′14″ 23°53′3″ 23°52′58″ 22°50′10″
101°4′21″ 101°12′47″ 101°13′8″ 101°10′46″ 100°57′1″ 100°56′55″ 101°3′4″
2022
1992, 2022 2021 2020 2019
20152, 20183 20152, 20183 2018
1884, 2023 2006
20122, 20173 1940 1929 2018
20102 20152, 20183
20152, 20183, 20223 20152, 20183 20152, 20183
20152, 20183, 20223 20102, 20153 20212, 20223 20212, 20223
20202, 20223 20202, 20223 20202, 20223 20202, 20223 20202, 20223 20202, 20223 2012
Location Bumthang, Bhutan Chintapu, Ilam, Nepal Punakha, Thimpu, Bhutan
Yadong, Tibet, China Goruwale, Nepal Trongsa, Bhutan Sikkim, India
Source
GBIF GBIF GBIF
Wangdue Phodrang, Bhutan GBIF Lhuentse, Bhutan
GBIF
Observation Decline (26/73) Observation Decline (42/57) GBIF GBIF
Jianchuang, Yunnan, China Observation Decline (29/40) GBIF4 GBIF4
Datang Cun, Yunnan, China GBIF Yunnan
Yunnan
Jianchuang, Yunnan, China GBIF4 Binchuang, Yunnan, China
Gongshan, Yunnan, China Gongshan, Yunnan, China Kachin Sate, Myanmar Kachin Sate, Myanmar Gongshan, Yunnan, China Fugong, Yunnan, China Gongshan, Yunnan, China Gongshan, Yunnan, China
Ninger, Yunnan, China Ninger, Yunnan, China Ninger, Yunnan, China Ninger, Yunnan, China Zhenyuan, Yunnan, China Zhenyuan, Yunnan, China Simao, Yunnan, China
1Numbers indicate the number of mature plants recorded in the latest survey/first survey. 2Intial survey year. 3Year of resurvey. 4Recorded as Buddleja heliophila.
Observation4 (4)
Observation Stable (.300/.300) Observation Decline (15/160) Observation Decline (110/133) Observation Decline (68/90) Observation Decline (2/20) Observation Disappeared (0/28) Observation Stable (1/1) Observation Stable (36/36)
Observation Decline (2/3) Observation Decline (7/10) Observation Stable (2/2) Observation4 Observation4 Observation4 CVH
Decline (5/6) Stable (1/1) Stable (1/1)
Status (number of plants)1
621
colvilei, eight of B. sessilifolia, six of B. delavayi (including B. heliophila) and seven of B. yunnanensis to use for automated assessment (Table 1). We found that all four Buddleja spe- cies had restricted distributions, with relatively small extents of occurrence and areas of occupancy, few occurrence lo- cations and small populations (Table 2). All three automa- ted assessments evaluated B. delavayi and B. yunnanensis as Endangered and B. colvilei and B. sessilifolia as Vulnerable, whereas our assessment based on our field studies is that both B. delavayi and B. yunnanensis should be categorized as Critically Endangered, B. sessilifolia as Endangered and B. colvilei as Vulnerable. The areas of occupancy calculated by the automated assessments
were notably different from that of the field assessments, particularly for B. sessilifolia and B. delavayi. Following the Red List criteria (IUCN, 2012), unique occurrences refer to cleaned and filtered records, subpop- ulations indicate distinct groups with limited genetic exchange, and locations are areas where a single threat can affect all individuals. The number of locations differs between the automated and traditional assessment methods (Table 2) because the former is based on unique occurrence records whereas the latter is based on direct field investigations. Buddleja colvilei is widespread, but this species is at risk of extinction because of logging and harvesting of wood
Oryx, 2024, 58(5), 618–626 © The Author(s), 2024. Published by Cambridge University Press on behalf of Fauna & Flora International doi:10.1017/S0030605323001503
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140
