Aktiviteter pr. år
Abstract
Il genere Plumbago ha una concentrazione di specie indigene in Africa tropicale orientale e nel Madagascar: nove specie su un totale compreso tra dodici e venticinque specie. Però, nella Flora of Ethiopia and Eritrea, vol. 5, pubblicato nel 2006, solo due specie indigene sono stati accettati: la largamente diffusa e comune specie P. zeylanica e una nuova specie, P. truncata, limitato a sud-ovest dell’Etiopia. Il nome P. truncata non è stato formalmente convalidato. Allora, più collezioni e osservazioni di Plumbago sono state fatte in Etiopia durante e dopo la preparazione del Flora of Ethiopia and Eritrea, e questi informazioni sono utilizzati qui: dopo una revisione di tutto il materiale di Etiopia e Eritrea, e un comparazione con materiale di Africa tropicale orientale, si è concluso che P. truncata è conspecifi ca con P. dawei, nota per l’Uganda, Kenya, Tanzania e Madagascar, e che un’altra specie conosciuta per l’Africa tropicale orientale (Kenya e Tanzania), P. montis-elgonis, é stata raccolta anche in due stazioni nel sud-ovest dell’Etiopia. In Etiopia, le due specie rare, P. dawei e P. montis-elgonis, sono limitate alle aree originariamente coperti da foresta umida: P. dawei si trova nella foresta pluviale di transizione (Transitional Rain Forest) e anche nella foresta fluviale (Riverine Forest), ma P. montis-elgonis si trova nella zona più bassa della foresta afromontana umida sempreverde (Moist Afromontane Evergreen Forest), secondo i tipi di vegetazione defi niti da Friis, Sebsebe Demissew e van Breugel. La distribuzione ed ecologia di P. dawei e P. montis-elgonis in Africa orientale e il Madagascar viene riesaminata, utilizzando i dati quantitativi disponibili. La distribuzione è stata ottenuta da dati d’erbario, mentre sono state valutate anche la distribuzione potenziale e lo stato di conservazione generale delle due specie. Malgrado loro rarità, almeno in Etiopia, le due specie siano da attribuire alla categoria IUCN Least Concern (LC) se si basi la stima sulla dimensione del EOO o sulla dimensione del AOO con grande cellule. Inoltre viene riproposto un nuovo trattamento del genere Plumbago in Etiopia e Eritrea, tenendo conto delle nuove scoperte secondo le norme della Flora of Ethiopia and Eritrea.
The genus Plumbago has a concentration of indigenous species in eastern tropical Africa and Madagascar: nine out of a total of between twelve and twenty-five species. In the Flora of Ethiopia and Eritrea, Vol. 5, published in
2006, only two indigenous species were accounted for: the widespread and common P. zeylanica and a new species, P. truncata, restricted to south-western Ethiopia. The name P. truncata was not formally validated. Since then more collections and field observations of Plumbago have been made in Ethiopia: after revision of the entire material it is concluded that P. truncata is conspecific with P. dawei, known from Uganda, Kenya, Tanzania and Madagascar, and that another tropical East African species, P. montis-elgonis, known from Kenya and Tanzania, also occurs in south-western Ethiopia. In Ethiopia the two species are restricted to areas originally covered by moist forest: P. dawei to Transitional Rain Forest and Riverine Forest, while P. montis-elgonis to the lowermost zone of the Moist Afromontane Forest, as these vegetation types have been defi ned by Friis, Sebsebe Demissew and van Breugel. The distribution and ecology of P. dawei and P. montis-elgonis in eastern Africa and Madagascar is also reviewed, using quantitative data available: the distribution as documented by herbarium material is shown, the potential distribution of the species is modelled, and the conservation status of the species is estimated. In spite of their rarity, the two species are attributed to the IUCN category Least Concern (LC) when the category is estimated using EOO and AOO with moderate or large cell size. A rewritten account of the genus Plumbago is provided in the format of the Flora of Ethiopia and Eritrea, taking account of the new findings.
The genus Plumbago has a concentration of indigenous species in eastern tropical Africa and Madagascar: nine out of a total of between twelve and twenty-five species. In the Flora of Ethiopia and Eritrea, Vol. 5, published in
2006, only two indigenous species were accounted for: the widespread and common P. zeylanica and a new species, P. truncata, restricted to south-western Ethiopia. The name P. truncata was not formally validated. Since then more collections and field observations of Plumbago have been made in Ethiopia: after revision of the entire material it is concluded that P. truncata is conspecific with P. dawei, known from Uganda, Kenya, Tanzania and Madagascar, and that another tropical East African species, P. montis-elgonis, known from Kenya and Tanzania, also occurs in south-western Ethiopia. In Ethiopia the two species are restricted to areas originally covered by moist forest: P. dawei to Transitional Rain Forest and Riverine Forest, while P. montis-elgonis to the lowermost zone of the Moist Afromontane Forest, as these vegetation types have been defi ned by Friis, Sebsebe Demissew and van Breugel. The distribution and ecology of P. dawei and P. montis-elgonis in eastern Africa and Madagascar is also reviewed, using quantitative data available: the distribution as documented by herbarium material is shown, the potential distribution of the species is modelled, and the conservation status of the species is estimated. In spite of their rarity, the two species are attributed to the IUCN category Least Concern (LC) when the category is estimated using EOO and AOO with moderate or large cell size. A rewritten account of the genus Plumbago is provided in the format of the Flora of Ethiopia and Eritrea, taking account of the new findings.
| Bidragets oversatte titel | Il genere Plumbago (Plumbaginaceae) in Etiopia e Eritrea |
|---|---|
| Originalsprog | Engelsk |
| Tidsskrift | Webbia |
| Vol/bind | 67 |
| Udgave nummer | 2 |
| Sider (fra-til) | 157-177 |
| Antal sider | 21 |
| ISSN | 0083-7792 |
| DOI | |
| Status | Udgivet - 15 dec. 2012 |
Emneord
- Det Natur- og Biovidenskabelige Fakultet
- Botanik
- Etiopien
- Plumbaginaceae
- Plumbago
- floristik
- plantegeografi
- conservation
- regnskov
- økologi
- Flora of Ethiopia and Eritrea
Fingeraftryk
Dyk ned i forskningsemnerne om 'Il genere Plumbago (Plumbaginaceae) in Etiopia e Eritrea'. Sammen danner de et unikt fingeraftryk.Aktiviteter
- 1 Andet (priser, ekstern undervisning samt andet). - Gæsteophold ved andre institutioner
-
Botanisk feltarbejde i mindre kendte egne af Etiopien (2012)
Friis, I. (Deltager)
26 okt. 2012 → 23 dec. 2012Aktivitet: Andre aktivitetstyper › Andet (priser, ekstern undervisning samt andet). - Gæsteophold ved andre institutioner