Biology
(
İngilizce
)
Arkive tarafından sağlandı
Very little is known about the biology of this tree but presumably, as with the other members of the podocarp family, animals attracted to the fleshy outer covering disperse the seeds. Germination occurs in wet mud and a strong taproot is rapidly grown to anchor the young plant to the soil; so that periodic floods will not sweep it away (3). These trees are probably finely tuned to the seasonal fluctuations of water in the streams and lakes of their natural habitat. Cultivation has so far only succeeded from cuttings (3).
Conservation
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İngilizce
)
Arkive tarafından sağlandı
Retrophyllum minus receives nominal protection within the Chûtes de la Madeline Reserve (2).
Description
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İngilizce
)
Arkive tarafından sağlandı
This relatively small conifer is found in and around water. The convoluted trunk is dark in colour and heavily fissured, and the small leaves are green. Seeds are borne singly, hanging from the twig and surrounded by a rounded, fleshy seed coat, rather than in cones (3).
Habitat
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İngilizce
)
Arkive tarafından sağlandı
Inhabits riverbanks and lakeshores; Retrophyllum minus is known as a 'rheophyte' because of this association (1).
Range
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İngilizce
)
Arkive tarafından sağlandı
Retrophyllum minus is endemic to the small South Pacific island of New Caledonia (1). Today the species has an extremely restricted range being found only on the Plaine des Lacs (1).
Status
(
İngilizce
)
Arkive tarafından sağlandı
Classified as Endangered (EN - C1+2a) on the IUCN Red List 2002 (1).
Threats
(
İngilizce
)
Arkive tarafından sağlandı
This species has suffered from habitat loss on the island of New Caledonia, for mining extraction and recreational activities (1). In the dry season, bush fires threaten the small remaining population (2). Changes in the water regimes of the small rivers in the area (there is already a large dam project realised) are likely to be detrimental to the survival of this unusual tree (3).
Retrophyllum minus
(
İngilizce
)
wikipedia EN tarafından sağlandı
Retrophyllum minus, the bois bouchon, is a species of conifer in the family Podocarpaceae. It is endemic to New Caledonia.[1]
It is a sparsely branched small tree with a flared trunk which tapers towards the top and has rough bark.[2] It produces pear-shaped fruits that are dark-red when mature.[2]
The species occurs near rivers and lakes of the Plaine des Lakes in the south of Grande Terre.[2] It is a rheophyte (grows in running water), the only such conifer known.[3]
It is threatened by habitat loss to mining and wildfire.[1]
References
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- Wikipedia authors and editors
Retrophyllum minus: Brief Summary
(
İngilizce
)
wikipedia EN tarafından sağlandı
Retrophyllum minus, the bois bouchon, is a species of conifer in the family Podocarpaceae. It is endemic to New Caledonia.
It is a sparsely branched small tree with a flared trunk which tapers towards the top and has rough bark. It produces pear-shaped fruits that are dark-red when mature.
The species occurs near rivers and lakes of the Plaine des Lakes in the south of Grande Terre. It is a rheophyte (grows in running water), the only such conifer known.
It is threatened by habitat loss to mining and wildfire.
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Retrophyllum minor
(
Fransızca
)
wikipedia FR tarafından sağlandı
Retrophyllum minor appelé "Bois-bouchon" est un conifère du genre Retrophyllum endémique de Nouvelle-Calédonie.
Description
Aspect général
Cette espèce se présente comme un arbrisseau ou un arbuste au tronc très évasé vers le bas, effilé vers le haut[2].
Bois
Le bois est formé d'une structure très aérée, formée par de minces lamelles séparées de couches d'air (dans le bois sec) ou d'eau (dans le bois vert).
Il est très peu dense, ce qui explique le nom vernaculaire de l'espèce[3].
Répartition
Cette espèce ne se trouve qu'en Nouvelle-Calédonie, dans le Sud de la Grande Terre, dans la Plaine des Lacs et ses environs immédiats[2].
Statut UICN
Cet arbre est considéré en danger par l'UICN. Son habitat est notamment menacé par les feux de brousse[3].
Notes et références
-
↑ IPNI. International Plant Names Index. Published on the Internet http://www.ipni.org, The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens., consulté le 13 juillet 2020
-
↑ a et b « Retrophyllum minus (Carrière) C.N.Page », sur endemia.nc (consulté le 5 février 2020)
-
↑ a et b Bernard Suprin, Stars du caillou - Les arbres, Nouméa, Nouvelle-Calédonie, Editions Grain de sable, collection Faune & Flore, juin 1996, 54 p. (ISBN 9782841700073), p. 8
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Retrophyllum minor: Brief Summary
(
Fransızca
)
wikipedia FR tarafından sağlandı
Retrophyllum minor appelé "Bois-bouchon" est un conifère du genre Retrophyllum endémique de Nouvelle-Calédonie.
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Retrophyllum minor
(
Portekizce
)
wikipedia PT tarafından sağlandı
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Retrophyllum minor: Brief Summary
(
Portekizce
)
wikipedia PT tarafından sağlandı
Retrophyllum minor é uma espécie de conífera da família Podocarpaceae.
Apenas pode ser encontrada na Nova Caledónia.
Esta espécie está ameaçada por perda de habitat.
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Retrophyllum minus
(
Ukraynaca
)
wikipedia UK tarafından sağlandı
Поширення, екологія
Країни поширення: Нова Каледонія. Зростає по берегах річок і озер на ультраосновних ґрунтах.
Опис
Невелике дерево або чагарник, 2-3 м заввишки. Кора груба, потріскана, волокниста, злегка лущиться на короткі і товсті вертикальні смуги, від світло до темно-коричневого кольору. Листки на молодих деревах 39 × 3-4,5 мм, на дорослих 7-20 × 2,5-5 мм. Пилкові шишки одиночні, іноді в групах по п'ять або більше, овальні, 4-8 × 2-2,5 мм. Насіння кульове або грушоподібне, 11-12.5 мм в діаметрі, вкрите м'ясистим покриттям темно-червоним після дозрівання. Поверхня насіння груба і пориста.
Загрози та охорона
Найбільш прямі загрози походять від лісових пожеж і розробок, пов'язаних з видобутком корисних копалин. Інші загрози походять від коливань потоків води і ґрунтових вод. Одна субпопуляція росте в фр. Chûte de la Madeleine Reserv.
Посилання
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Retrophyllum minus
(
Vietnamca
)
wikipedia VI tarafından sağlandı
Retrophyllum minus là một loài thực vật hạt trần trong họ Thông tre. Loài này được (Carrière) C.N.Page miêu tả khoa học đầu tiên năm 1988 publ. 1989.[1]
Chú thích
Liên kết ngoài
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Retrophyllum minus: Brief Summary
(
Vietnamca
)
wikipedia VI tarafından sağlandı
Retrophyllum minus là một loài thực vật hạt trần trong họ Thông tre. Loài này được (Carrière) C.N.Page miêu tả khoa học đầu tiên năm 1988 publ. 1989.
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